An HDB resale flat already exists.
You can walk through it. You can see the block, the neighbours, the MRT distance, the afternoon sun and the exact view from the window.
That makes resale feel simpler than BTO.
Operationally, it is not simply “buyer pays seller and gets keys.”
A resale transaction has to synchronise eligibility, financing, contract, valuation, HDB approval, CPF, loans, legal conveyancing and possession.
For the whole public-housing system, return to How HDB Works in Singapore. The existing market-level owner is How HDB Works | The Resale Market. This article owns the transaction path.
This article reflects HDB guidance available on 4 September 2026.
Quick Answer
The modern HDB resale buying path is broadly:
HFE → BUDGET / FINANCING → FIND FLAT → AGREE PRICE → HDB OPTION TO PURCHASE → REQUEST FOR VALUE IF NEEDED → EXERCISE OTP → BUYER + SELLER SUBMIT RESALE APPLICATION → HDB PROCESSING / ENDORSEMENTS / PAYMENTS → RESALE COMPLETION → KEYS
HDB guides buyers and sellers through My Flat Dashboard. A resale application is only complete after HDB receives both sides’ portions and the required supporting documents.
Official HDB process: Process for Buying a Resale Flat.
Step 1 — HFE Comes Before the Flat Contract
The HDB Flat Eligibility letter tells the household whether it is eligible for the resale purchase route, applicable CPF housing grants and an HDB housing loan where relevant.
HDB requires a valid HFE before a buyer enters the resale contract through the prescribed Option to Purchase.
This moves a crucial question upstream:
Can this household legally and financially use this housing route?
before:
Which flat do we emotionally want?
Step 2 — Decide How the Purchase Will Be Financed
Before agreeing on a price, the buyer should understand the combination of cash, CPF and housing loan available.
If using an HDB housing loan, the HFE must indicate eligibility for it before the seller grants the OTP. If using a financial-institution loan, HDB requires a valid Letter of Offer before the buyer exercises the OTP.
Official HDB guidance: Mode of Financing for a Resale Flat.
Step 3 — Find a Flat and Agree the Price
The resale price is negotiated between buyer and seller.
This is one of the fundamental differences from a new HDB flat sold directly by HDB.
But the negotiated number is not yet the HDB valuation.
That distinction becomes important because CPF usage and housing-loan calculations are tied to the value determined through HDB’s Request for Value process.
Step 4 — The Seller Grants the Prescribed OTP
Buyer and seller must use HDB’s prescribed Option to Purchase. HDB states that supplementary agreements relating to the sale or purchase are not valid under the Housing and Development Act.
The buyer pays an Option Fee negotiated with the seller between $1 and $1,000.
Once the OTP is granted, the seller cannot grant another OTP for the flat until the first one expires.
The Option Period is 21 calendar days.
Official owner: Option to Purchase When Buying a Resale Flat.
Step 5 — Request the Flat Value if CPF or a Loan Will Be Used
If the buyer intends to use CPF savings and/or a housing loan, HDB requires a Request for Value after the OTP is granted.
HDB currently requires the request to be submitted through My Flat Dashboard by the next working day after the Option Date, together with the required OTP page and a $120 processing fee including GST.
If the purchase is entirely cash-funded with no CPF and no housing loan, a Request for Value is not required.
Official guidance: Request for Value for a Resale Flat.
Step 6 — The Buyer Decides Whether to Exercise the OTP
If CPF or a housing loan is being used, HDB requires the buyer to wait for the flat value before exercising the OTP.
This is a critical control point.
Only now can the buyer see whether the agreed resale price sits above the value used for CPF and financing.
If the buyer proceeds, the OTP is exercised during the 21-day Option Period and an Option Exercise Fee is paid. HDB states that the Option Fee plus Option Exercise Fee cannot exceed $5,000 in total.
If the buyer does not proceed, the OTP can be allowed to expire and the Option Fee is forfeited.
Step 7 — Buyer and Seller Submit Separate Resale Applications
After the OTP is exercised, buyer and seller each submit their own portion of the resale application.
HDB currently requires both submissions to fall within the number of days agreed in the OTP and within seven days of each other.
The application becomes complete only when both portions and the necessary supporting documents have reached HDB.
Step 8 — HDB Checks the Transaction
HDB now checks whether the parties and transaction satisfy the resale rules.
This can include eligibility, ownership, financing, CPF, declarations, ethnic or citizenship quota conditions where applicable, and supporting documents.
The system is not merely recording a private sale.
It is verifying that the public-housing asset can legitimately move from one household to another.
Step 9 — Endorsements and Financial Plan
During processing, buyers and sellers are guided through My Flat Dashboard to endorse documents and confirm the financial plan.
The buyer’s purchase resources now have to reconcile:
- cash;
- CPF savings and grants;
- housing loan;
- purchase price;
- HDB value;
- stamp and legal fees;
- any cash-over-valuation amount.
A transaction can be affordable in total and still fail at this point if the wrong type of money is available at the wrong time.
Step 10 — Resale Completion
Completion is the handoff state.
The seller’s ownership closes.
The buyer’s ownership begins.
Loans, CPF refunds, purchase monies and legal documents are settled through the applicable process.
Keys pass to the buyer subject to the agreed completion arrangements and any approved temporary extension of stay.
Why Resale Can Be Faster but More Information-Heavy
A BTO buyer waits for a building to be constructed.
A resale buyer waits for a legal and financial transaction to complete.
The resale route can therefore deliver possession much sooner, but the buyer must assess a much richer existing object:
- remaining lease;
- flat condition;
- renovation;
- neighbours;
- orientation;
- town maturity;
- transaction price;
- valuation;
- COV;
- future maintenance.
Failure Mode: Agreeing on Price Before Knowing the Real Budget
The flat feels perfect.
The buyer stretches the offer.
Only after the Request for Value does the household discover that part of the price must be paid in cash above valuation.
The transaction then becomes a liquidity problem.
Budget should constrain the negotiation, not be reconstructed after it.
Failure Mode: Treating OTP as a Casual Reservation
The HDB-prescribed OTP is a legally binding contract once exercised.
The 21-day Option Period exists so the buyer can investigate, confirm financing and decide deliberately.
Use the period as a decision window, not a countdown to panic.
Failure Mode: Treating HDB Approval as Guaranteed
An agreed private price does not override public-housing eligibility rules.
The buyer and seller can agree commercially and still need HDB to accept the resale application.
This is why HDB resale is simultaneously a market transaction and a regulated public-housing transfer.
Forward Play: Follow the Flat
It begins with Household A.
A buyer finds it.
Price is negotiated.
The OTP freezes the opportunity for a defined period.
Valuation anchors CPF and financing.
HDB checks the transfer.
Completion moves the flat to Household B.
The building did not move.
The household state around it did.
Reverse Play: Start From Key Handover
For the buyer to receive the keys, several earlier states must all have succeeded.
Eligibility had to fit.
Financing had to fit.
The OTP had to be validly exercised.
The resale application had to be complete.
HDB had to accept the transfer.
Money and documents had to converge at completion.
A resale transaction is a synchronisation problem disguised as a property viewing.
The Deepest Answer
An HDB resale transaction works by taking a lived-in public home out of one household state and admitting it into another.
The market discovers the price.
The OTP turns agreement into a controlled contract.
The Request for Value anchors CPF and lending.
HDB verifies that the transfer still obeys public-housing rules.
Completion synchronises ownership, money and possession.
The flat already existed.
The transaction builds the lawful path that lets a different household call it home.
Continue Through the HDB System
Return to How HDB Works in Singapore and How the HDB Resale Market Works.
Next: How the HDB Resale Option to Purchase Works | The 21-Day Contract Window Between Buyer and Seller.