Before buying a renovated HDB resale flat, check whether walls, windows, bathrooms, air-conditioning installations and other works were lawful. HDB’s current resale Terms and Conditions make an important distinction: the seller must rectify or remove unauthorised renovations identified before resale completion, but the buyer purchases on a caveat emptor basis and is responsible for irregularities, including unauthorised works made by the seller, that are discovered after completion. The HDB Branch’s resale inspection is designed to detect unauthorised work that could affect structural stability or HDB property; it does not certify the value, all workmanship or the safety of every fixture in the flat.
That means a beautiful open-plan apartment can carry risks not visible in the photos. An improperly hacked wall, altered window, defective waterproofing or enclosed common corridor can cause expensive rectification and delay. HDB says no renovation works should be undertaken while resale completion is pending; where work is done and damages the building, seller and buyer can be jointly and severally responsible. This guide shows how to examine the original plan, ask for permit evidence, obtain appropriate professional inspection and negotiate a lawful handover before committing to an Option to Purchase.
- Get the original HDB floor plan
- compare it with every major physical alteration
- ask the seller for HDB renovation permits and licensed-trade documentation
- check hacked walls, wet areas, household shelter, windows and air-conditioning
- do not treat HDB’s resale inspection as a full home survey
- obtain an independent Qualified Person when warranted
- record defects and promised rectification in the sale process
- require the seller to address identified unauthorised works before completion
- do not start early renovation
- preserve photographs, correspondence and any follow-up HDB inspection
- and set aside a separate repair reserve.
Contents: From first viewing to safe completion
- 1. Resale is a purchase of an existing physical home
- 2. The caveat emptor rule is a serious buyer warning
- 3. What the HDB Branch inspection actually checks
- 4. When the seller must rectify unauthorised work
- 5. Why problems discovered later can become the buyer’s responsibility
- 6. No early renovation pending resale completion
- 7. The original floor plan is the main comparison
- 8. Load-bearing walls and beams deserve specialist attention
- 9. Not every interior wall needs the same permit
- 10. The household shelter is a protected structure
- 11. Bathroom waterproofing is a common hidden issue
- 12. Wet areas should not be relocated by assumption
- 13. Windows have separate safety duties
- 14. Air-conditioning installation requires compliance
- 15. Doors, gates and fire-rated entrances
- 16. Common corridors cannot simply be annexed
- 17. Check service yards and laundry fittings
- 18. Electrical rewiring is separate from wall approval
- 19. Plumbing records need appropriate trade evidence
- 20. The HDB Directory of Renovation Contractors is useful but limited
- 21. Ask the seller for documents without making accusations
- 22. A Qualified Person can provide useful independent assessment
- 23. Use the HDB resale inspection for its proper role
- 24. Write known defects into the transaction discussion
- 25. Know when to decline a seemingly cheap flat
- 26. Sellers should inspect before marketing too
- 27. Resale completion may be delayed for rectification
- 28. What happens with new work before completion
- 29. A final buyer inspection is not a structural survey
- 30. Liability after purchase is why records matter
- 31. The final go-or-no-go decision
- 50 buyer and seller scenarios
- Frequently asked questions
- HDB official terms
1. Resale is a purchase of an existing physical home
Unlike a new flat delivered by HDB, a resale apartment may contain decades of work by previous owners. Some was approved; some may have been permit-free yet compliant; some may be unauthorised or physically defective.
Two flats with identical original plans can now look completely different. The visible difference is a reason to examine records, not immediate proof of wrongdoing.
An informed buyer asks what changed, what was authorised and whether the present condition is safe and suitable. A seller should be ready to explain significant modifications honestly.
2. The caveat emptor rule is a serious buyer warning
HDB’s resale terms state that the buyer purchases on a caveat emptor basis, meaning the buyer must check the condition and verify that renovation works are authorised and compliant with HDB and other competent authorities.
The same terms say the buyer is responsible for irregularities, including unauthorised works by the previous seller, discovered later. This is why relying solely on HDB’s own inspection is not enough.
Do not interpret the rule as permission for sellers to conceal problems. The seller still has formal obligations and legal advice may be needed where misleading statements or contractual breaches are involved.
3. What the HDB Branch inspection actually checks
After HDB accepts a complete resale application, its Branch Technical Executives arrange a flat inspection. HDB describes its purpose as detecting unauthorised renovations that may damage HDB property, other flats or structural stability.
The inspection is not a general building survey or valuation. It does not establish whether every renovation was well executed or whether every fitting complies with other laws.
Homebuyers should not tell themselves ‘HDB inspected it, so the pipes, wiring and all hidden structures are guaranteed safe.’ That is not what the service promises.
4. When the seller must rectify unauthorised work
HDB’s current resale procedure says the seller must regularise or remove unauthorised renovation work identified before completion, and resale approval can be withheld until required steps are satisfied.
Ask for the formal issue, proposed repair and evidence of the follow-up outcome. A seller’s promise to ‘deal with it later’ should not replace HDB’s completion requirements.
Some rectification may take time or cost significantly more than the original work. Address the risk before relying on a narrow moving timetable.
5. Why problems discovered later can become the buyer’s responsibility
HDB’s written conditions specifically warn that buyers are responsible for unauthorised renovations subsequently found even if the seller carried them out years earlier.
A buyer who discovers a hidden illegal alteration after moving in may face an obligation to put it right under the relevant rules. Whether another private party owes compensation is a separate contractual or legal question.
Treat approval records as valuable evidence, but remain realistic about concealed work and the limits of an ordinary visual viewing.
6. No early renovation pending resale completion
HDB’s resale terms state that no renovation works should be carried out while resale completion is pending. This prevents disputes over damage and preserves the condition of the home during transfer.
The terms also provide that seller and buyer can be jointly and severally liable for damage to the flat or building caused by renovation done during the pending period.
Do not arrange a contractor to begin hacking between exercising the OTP and legal completion, even if the seller offers informal access or the buyer is eager to move quickly.
7. The original floor plan is the main comparison
Obtain the relevant original HDB floor plan using the proper portal or property records. Mark bedrooms, load-bearing structural elements, bathrooms, household shelter, service yard and entrances.
Then compare the existing home room by room. A wall that used to divide the kitchen and dining area may be removed lawfully with permission in some situations, but it must be assessed against the actual rules and plan.
A drawing from an interior designer is useful for orientation but not definitive evidence that HDB approved the alteration.
8. Load-bearing walls and beams deserve specialist attention
Structural reinforced-concrete walls, beams and columns help support the building. HDB renovation guidelines restrict alterations that could affect their structural function, and wall demolition requires the applicable prior written approval.
Do not conclude a wall was safe to remove because it looked thin or other residents made similar alterations. Hidden reinforcing elements and the exact structural scheme matter.
Where a modification is material, seek a suitable Qualified Person or professional engineer’s assessment instead of personally investigating with tools.
9. Not every interior wall needs the same permit
Some changes are cosmetic, while wall demolition and alteration are subject to HDB’s work-specific approval process. The correct answer depends on the actual location and whether structural or safety systems are affected.
Ask which works were permit-required when they were carried out, and which current restrictions apply to proposed new changes. Historical and present rules need careful treatment.
Do not label every missing lightweight partition an illegal renovation solely because the flat no longer matches a basic model drawing.
10. The household shelter is a protected structure
HDB household shelters form part of important emergency protection arrangements. Their walls, door, frame, ventilation elements and specified fittings cannot be treated as ordinary decorative partitions.
A renovated flat with built-in cabinetry hiding shelter features should be checked for lawful access and compliance. A seller may have installed something attractive that is not allowed.
Ask for the relevant HDB rules and approved work records. Do not remove shelter fittings or make new holes without appropriate permission.
11. Bathroom waterproofing is a common hidden issue
A visually new bathroom can contain poor waterproofing, defective drains or altered pipes that cause leaks into the unit below. The HDB Branch’s resale inspection does not guarantee the concealed work is sound.
Inspect for damp ceilings, mould, grout failures, soft skirting and the history of downstairs complaints. A suitable professional can investigate when the potential cost is material.
Do not rely on a fresh coat of paint to prove the source of a leak is permanently fixed.
12. Wet areas should not be relocated by assumption
A seller may have moved kitchen or toilet fittings to create an open concept. Such work can affect plumbing, waterproofing, ventilation and applicable HDB restrictions.
Ask which approved plans and permits covered the change and whether registered plumbers carried out relevant regulated work.
A pleasing floor plan is not itself evidence that a new bathroom or kitchen position is legally permitted. Check before buying or planning another renovation.
13. Windows have separate safety duties
HDB states that casement windows must comply with the relevant Building Control requirements and sliding windows must have suitable safety features. The resale process can be held up until non-compliant windows are corrected at the seller’s expense.
Look for missing window restrictors, damaged fasteners, corrosion and signs of unauthorised replacement. Do not physically lean out to test external windows.
Ask whether an approved window contractor carried out applicable replacement works. The buyer should not assume the HDB branch performed a full window engineering assessment.
14. Air-conditioning installation requires compliance
Exterior condenser brackets, ledges, drainage and pipe routes must meet relevant HDB and technical requirements. An existing air-conditioner that cools well during the viewing can still have installation or water-leak problems.
Check the unit’s actual approved location and any available installer documents. Observe stains or dripping around the service yard, facade and neighbouring windows where safe.
Do not relocate condensers yourself or approve unqualified external work. Use the appropriate trained contractors and seek HDB guidance on proposed changes.
15. Doors, gates and fire-rated entrances
Some HDB homes require specific fire-rated entrance doors or other arrangements based on the block’s fire-safety design. A private designer’s replacement door may not match the original requirement.
Check whether the entrance door, grille gate or recess enclosure has proper approval and maintains fire escape access. The fact that a fitting looks newer or expensive does not prove compliance.
Ask about any required certification or rectification before legal completion, especially where a previous owner changed the entire doorway configuration.
16. Common corridors cannot simply be annexed
Some older flats qualify to buy a designated recess area through HDB’s formal scheme. Ordinary common corridors and other shared spaces cannot simply be enclosed by moving a gate outward.
An old gate in a recess is not proof the area was legally purchased. Confirm title and approval where the apparent extra space is part of the advertised flat.
Do not count unauthorised common area as the home’s owned floor space or accept the idea that many years of occupation makes an enclosure automatically legal.
17. Check service yards and laundry fittings
Air-conditioning ledges, service yards, external clothes-drying fittings and related structures can have specific HDB safety and technical conditions.
A previous owner might have enclosed or altered a space to create more storage. Check whether it is permitted and whether important pipes, drains and access routes remain usable.
Do not use a service or maintenance platform as ordinary living space merely because it has a tiled floor.
18. Electrical rewiring is separate from wall approval
A renovation permit for hacking does not prove all electrical work is safe or performed by an appropriately licensed person. HDB identifies EMA-licensed electrical workers for regulated installations.
Inspect visible power points, distribution-board condition and unusual cable routes, without opening live equipment. A professional can assess material concerns safely.
Keep electrical documentation where available, especially when kitchens were heavily modified or many new high-load appliances were installed.
19. Plumbing records need appropriate trade evidence
PUB-licensed plumbers are required for specified regulated plumbing and water service work. A decorative renovation quotation alone does not certify all associated pipe modifications.
Ask about replacement of old pipes, leaks, water-meter changes and concealed service routes. Check that work affecting common or public systems was handled lawfully.
If there is evidence of ongoing leakage or abnormal water bills, obtain proper diagnosis before the sale rather than assuming the seller will pay for it after handover.
20. The HDB Directory of Renovation Contractors is useful but limited
HDB requires contractors undertaking HDB renovations to be listed in the Directory of Renovation Contractors. That helps verify the firm may carry out relevant works under HDB rules.
HDB also states that registration is not an endorsement of workmanship. The buyer still needs evidence that the specific work was actually approved and correctly performed.
A contractor’s old HDB logo is not a substitute for permits, technical records or a Qualified Person’s judgment.
21. Ask the seller for documents without making accusations
Request copies or references for significant renovations, permits, approved layouts, invoices and the identity of contractors. Some sellers may have inherited the flat or bought it years after the changes, so records can be incomplete.
Missing paperwork is a risk requiring investigation, not automatic proof of wrongdoing. Clarify which alterations needed permission and how HDB records may be checked.
A calm written request produces better information than accusing the seller of hiding defects before the facts are known.
22. A Qualified Person can provide useful independent assessment
HDB explicitly advises resale buyers to engage a Qualified Person, such as a Building Surveyor, at their own cost to help check condition and renovation compliance.
This becomes particularly relevant for heavily remodelled flats, suspected structural changes or a history of water damage. The professional’s scope should be clear: a visual survey cannot guarantee concealed work that has never been opened.
Ask for a written report with observations, documentary gaps and recommendations. It can inform negotiations and the decision whether to proceed.
23. Use the HDB resale inspection for its proper role
After HDB accepts the application, Branch inspection is part of the resale process. If an issue is identified, the seller is expected to regularise or remove unauthorised work before HDB completes the sale.
Buyers can follow up on the status through the official HDB portal and the parties’ agents or solicitors. Do not personally order unsafe remedial work in a home you do not yet own.
Distinguish HDB’s formal approval for resale from a private promise by the seller that an issue was fixed.
24. Write known defects into the transaction discussion
A buyer may negotiate the price or ask for appropriate clarification about repairs. The agreed legal documents should accurately reflect any material obligations or timelines.
Do not attempt side agreements that misstate the HDB resale price or bypass HDB’s rules. A seller and buyer cannot contract to make a prohibited alteration lawful.
Use legal or professional advice when a defect is significant. A short text-message assurance can be inadequate for a costly structural issue.
25. Know when to decline a seemingly cheap flat
An apartment priced well below nearby transactions might have a legitimate reason, such as an urgent sale, unusual layout or extensive repair needs. It may also carry unresolved physical or legal risks.
Calculate the cost and feasibility of proper rectification before comparing it with a move-in-ready alternative. A discount is not a solution to an unknown structural defect.
A buyer can decide not to proceed if essential approval or financing information cannot be obtained within an acceptable risk level.
26. Sellers should inspect before marketing too
Sellers benefit from knowing whether earlier renovations require correction, because a problem discovered late can delay completion, disrupt a new home purchase or create additional expenses.
Review HDB records and address obvious safety issues before promising a handover date. If a prior contractor completed work improperly, investigate the appropriate remedy rather than conceal it.
Accurate marketing and documentation protect the seller’s credibility and the buyer’s ability to decide responsibly.
27. Resale completion may be delayed for rectification
HDB’s procedures say identified unauthorised works must be rectified before completion. Window non-compliance and other required repairs can also affect when final approval is given.
A household should not schedule non-refundable movers or end a tenancy on the assumption that every reported issue can be fixed immediately.
Keep a contingency for completion delays, legal advice and temporary accommodation. Housing decisions should survive a realistic problem rather than depend on perfect timing.
28. What happens with new work before completion
HDB’s terms say no renovation may be performed while resale completion is pending, and they describe joint and several liability where work during that period damages the flat or building.
A buyer eager to move walls before collecting keys can unintentionally create legal and financial exposure for both parties.
Follow the official handover sequence. Once lawful possession is obtained, apply for the relevant new renovation permits before contractors begin.
29. A final buyer inspection is not a structural survey
An agreed walk-through before completion helps confirm vacant possession, fixtures and visible condition. It is valuable but does not expose every concealed pipe or verify a reinforced-concrete wall.
Compare the home with earlier photographs and the contract, then raise material changes through the proper process. Do not assume a ten-minute final inspection is enough to resolve a complex engineering concern.
Use the Qualified Person’s report and HDB documentation where the stakes justify it.
30. Liability after purchase is why records matter
Once the transaction completes, later-discovered irregularities can become the buyer’s problem under HDB’s resale terms. Documentation of the original state, permits and seller representations may still matter to any separate private dispute.
Keep copies of the listing, OTP, correspondence, HDB results, survey and renovation invoices securely. A complete record gives advisers a better basis for determining rights and repair obligations.
Do not assume HDB’s caveat emptor rule answers every potential private contractual claim; consult a lawyer where there is evidence of a serious misrepresentation.
31. The final go-or-no-go decision
Before exercising an option, identify major physical changes and gather available permits, obtain an appropriate condition assessment, calculate repairs and ensure HFE and financing are realistic.
Before completion, check that seller-required unauthorised works have been regularised, that windows meet relevant safety requirements and that no improper early renovations have begun.
A strong HDB resale purchase is not simply a low price and fashionable interior. It is a legally transferable, safely maintainable home whose true costs the household understands.
50 HDB resale renovation scenarios
These examples identify questions that warrant verification. They are not technical diagnoses or case-specific legal judgments. The actual HDB rules and property records apply.
1. The kitchen wall has been removed
Compare with the original HDB plan and ask for HDB hacking approval. A spacious open kitchen may be lawful but appearance alone is not proof.
2. The seller says no permit was needed for every wall change
HDB’s rules distinguish types of work. Request evidence for the specific demolition and confirm whether permission was required.
3. A reinforced concrete column looks modified
Stop treating the issue as cosmetic and seek suitable professional assessment. Structural elements must not be altered casually.
4. The flat’s household shelter has extra holes
Review applicable HDB shelter restrictions. The door and walls form a protected safety element, not ordinary renovation surfaces.
5. An outdoor service ledge is enclosed as a room
Check the approved layout and technical rules. A tiled platform is not automatically permitted as indoor living space.
6. The entrance gate extends into the common corridor
Ask whether the recess area was legally purchased or whether the gate is unauthorised. Long-standing use does not create title.
7. The unit advertises a second kitchen in a bedroom
Ask about plumbing and allowed use. A new kitchen location may involve prohibited or regulated works.
8. The bathrooms were renovated last month
Inspect waterproofing, drainage and relevant work records. Recent tiles do not guarantee concealed systems are safe.
9. A downstairs neighbour reports ceiling seepage
Document the concern and investigate the source. The buyer should not assume the defect disappears on ownership transfer.
10. Window hinges show corrosion
HDB resale requires window safety compliance. The seller may need to replace or rectify non-compliant fittings before completion.
11. Sliding windows have no suitable safeguards
HDB’s terms require adequate safety features to prevent panels jumping tracks. Seek proper inspection and correction.
12. The seller removed a fire-rated door
Check whether the original doorway requires a fire-rated assembly and appropriate reinstatement. A stylish replacement may not comply.
13. The air-conditioner condenser sits on a makeshift bracket
Ask for proper installation evidence and professional safety advice. External equipment can endanger people below.
14. The kitchen has exposed wiring
Use a licensed electrical worker to assess safety, not a casual visual opinion. A building resale inspection is not an electrical certification.
15. The owner says HDB inspected everything and passed
HDB Branch checks a limited purpose; it does not certify every fixture, condition or hidden alteration. Independent diligence remains important.
16. The seller inherited the flat and has no renovation records
Missing records are not automatically wrongdoing. Compare the original plans and seek formal verification or professional assessment of material changes.
17. The designer’s plan says ‘approved’ without permit numbers
Ask for actual HDB permission and relevant documents. A designer’s note is not the authority’s formal decision.
18. The agent says the buyer will never be liable for old works
HDB’s current terms warn buyers of responsibility for irregularities discovered after completion. Correct the claim before making a binding decision.
19. The HDB Branch finds an unauthorised wall change
The seller is expected to regularise or remove it before completion. Ask for formal rectification and follow-up status.
20. The seller asks to rectify after buyers move in
That may conflict with HDB’s pre-completion requirements for identified unauthorised works. Consult HDB and the solicitor before agreeing.
21. A buyer wants to send a contractor before keys
HDB prohibits renovation while resale completion is pending and imposes liability for resulting damage. Wait until lawful completion and approved permits.
22. The seller offers to let the buyer hack walls early
Informal seller consent does not override HDB’s resale terms. Do not create joint and several liability for unsafe works.
23. A buyer sees a large discount on a heavily remodelled flat
Calculate legal and physical rectification exposure before treating the price as a bargain. Unknown structural risk can outweigh the discount.
24. An owner installed new windows using an unapproved contractor
Check compliance with BCA and HDB window safety requirements and obtain qualified rectification where necessary.
25. The bathroom has a hidden shower drain in a new position
Seek proper plumber and waterproofing assessment. A visually functional drain may still be poorly or unlawfully routed.
26. The resale flat has a built-in loft
Ask whether it is an approved and safe installation. A high-ceiling storage platform is not automatically authorised structural floor area.
27. A seller claims the previous owner was responsible
The current seller must meet HDB’s completion requirements; the buyer also faces later irregularity risk. Historical blame does not settle present duties.
28. A buyer wants to negotiate repair costs
Keep the arrangement transparent and compliant with HDB’s sale process. Do not misstate the property price or bypass required rectification.
29. The resale completion is delayed for windows
Check HDB’s directions and the seller’s obligations. Window compliance can keep completion in abeyance until corrected.
30. The kitchen renovation hides common service pipes
Investigate access needs and HDB rules. Service risers cannot be appropriated as unrestricted private cupboard space.
31. A condo inspection report is used for an HDB flat
Ask whether the surveyor understands HDB-specific permit, shelter and resale rules. Building type affects the legal questions.
32. The family has elderly residents who need accessibility
Inspect thresholds and bathroom layouts and verify whether past changes were lawful. Future modifications may require separate approval.
33. A contractor’s HDB registration appears genuine
Registration does not prove every particular work was permitted or well executed. Review project permits and workmanship.
34. The flat is being sold subject to tenant occupation
Clarify vacant possession separately from renovation compliance. The buyer needs both a lawful handover and an accurate condition assessment.
35. A seller wants to finish renovation just before the HDB Branch visit
New work should follow permitted timing and contractor rules. Once resale is pending, HDB’s no-renovation provision matters.
36. The buyer plans to refinance after purchase
Loan approval and valuation do not guarantee renovation compliance. Financing and physical due diligence are different checks.
37. Water stains were freshly painted over
Ask about past leaks and seek investigation when material. Paint can hide symptoms without repairing the underlying issue.
38. The owner extended the living room into a balcony
Check original approved plans and HDB rules. The extra usable appearance may include unauthorised modifications.
39. An agent says everybody has a similar balcony enclosure
Widespread practice is not legal approval. Verify the exact configuration rather than relying on neighbours.
40. The owner claims all electrical work was done by a family member
Regulated installations require appropriate licensed personnel. Ask for a competent safety assessment and records.
41. A buyer has just discovered a hidden illegal alteration after completion
Seek HDB and qualified professional guidance promptly. HDB’s terms warn that the buyer can be responsible for later-discovered irregularities.
42. The buyer believes HDB must reimburse all repairs
HDB’s caveat emptor terms do not promise reimbursement for every hidden defect. Separate contractual claims require individual legal assessment.
43. The seller concealed a serious issue in messages
Preserve evidence and seek proper legal advice; HDB inspection limitations do not determine every private misrepresentation claim.
44. A family considers commissioning a Building Surveyor
HDB explicitly advises buyers this can help verify works. Define the inspection scope and understand limits on concealed items.
45. The seller cannot obtain structural approval
Do not proceed on an assumption that a dangerous alteration can be kept. Determine the formal rectification requirement and cost.
46. An older flat has a professionally approved open layout
Keep the permits and inspect its current physical condition. An approved layout can still need ordinary repairs.
47. The buyer wants to inspect only on completion day
Meaningful diligence should occur before the binding option decision. A final walk-through is useful but cannot replace early checks.
48. A buyer is preparing a first-visit checklist
Bring original floor plan, ask about significant renovation history and photograph visible concerns with permission.
49. A flat shows irregular ceiling additions
Check whether structural, fire or service access is affected and seek suitable technical advice rather than assuming a decorative ceiling is harmless.
50. A seller wishes to avoid a delayed transaction
Inspect and address unauthorised work early, retain records and comply with HDB Branch requirements before marketing heavily.
51. The buyer has no repair reserve
Reconsider the purchase or budget, especially for a heavily modified resale home. Unforeseen works may be expensive.
52. The parties have completed the formal rectification
Keep HDB’s relevant confirmation, contractor evidence and any professional reports. The result should be documented for the future owner.
53. The family is ready to buy
Choose the home only after verifying significant alterations, actual condition, affordability, loan and legal completion. An attractive interior is not enough.
Frequently asked questions
Does HDB’s resale inspection guarantee all renovations are safe?
No. HDB says it checks for certain unauthorised work affecting property or structural stability, not every fixture or workmanship issue.
Must the seller remove unauthorised work before completion?
Yes, where HDB identifies work requiring regularisation or removal under its resale rules.
Can the buyer be responsible for old unauthorised work?
Yes. HDB’s caveat emptor terms warn of buyer responsibility for irregularities discovered after completion.
Can buyers renovate before HDB resale completion?
No. HDB’s resale terms prohibit renovation while completion is pending.
What if early renovation damages the building?
HDB’s terms provide for joint and several liability of buyer and seller for damage resulting from prohibited work.
Does removing a partition always require permission?
Check the specific HDB guidelines and wall type; regulated demolition or alteration may require prior written approval.
Are windows part of the resale compliance check?
The seller must ensure relevant safety requirements and may need rectification before completion.
Can HDB approve every past alteration retrospectively?
Do not assume so. The authority determines whether a particular issue may be regularised or must be removed.
What is an original floor plan used for?
Comparing the approved property layout against significant alterations and planning a safe inspection.
Should a buyer engage a Building Surveyor?
HDB advises considering a Qualified Person such as a Building Surveyor at the buyer’s expense.
Does a DRC-listed contractor prove the past work is approved?
No. Contractor listing and the particular renovation permit are different facts.
Is a false ceiling always an illegal renovation?
No. Check the actual work, technical conditions and applicable permits before classifying it.
Can buyer and seller make a private agreement to keep prohibited work?
They cannot override HDB or safety requirements by private consent.
What should I do before exercising OTP?
Compare plans, inspect important changes, request permits, evaluate risks and confirm financing and the true repair budget.
Official HDB and technical references
HDB’s express resale terms state that buyers bear later-discovered irregularity risks. Inspect thoroughly and seek independent qualified advice where needed; this guide does not certify any property.
- HDB Resale Terms and Conditions — Renovation and Windows
- HDB Resale Procedures — HDB Branch Inspection
- HDB Seller’s Resale Application Approval
- HDB Renovation Permit Application
- HDB Building Works Guidelines
- HDB Directory of Renovation Contractors
- PUB Licensed Plumbers
- BCA Window Safety
Continue Singapore property guides
- Resale Flat Viewing and Inspection
- HDB Renovation Contractors, Contracts and Permits
- HDB Floor Plans and Flat Layouts
- Conveyancing, OTP and Legal Completion
Editorial review 7 November 2026. General guidance; HDB and individual contractual obligations require real property-specific assessment. Immutable Clementi reference unchanged.
