Modes of Sale

Our modes of sale are:

  • Build-To-Order (BTO) exercise
  • Sale of Balance Flats (SBF) exercise
  • Open booking of flats

Visit HDB Flat Portal for information on BTO projects to be offered in the current and upcoming sales exercise, such as flat types, number of units and town map. Prices and additional details will be posted during the sales exercise. To be notified of the sales exercises, please subscribe to HDB eAlerts. You may also read our frequently asked questions on sales exercise.

Applicants may be eligible for the various priority schemes to increase their chances of getting a flat. Nevertheless, to discourage non-selection of flats and prioritise applicants who are in urgent need to buy a flat, application restrictions will apply if you choose not to book a BTO or SBF flat when you are invited to do so.

Additionally, BTO/ SBF applicants who have received a queue position that is within the flat supply will not be eligible to apply for a flat in subsequent sales exercises until after their flat booking appointment. This is to give other applicants a chance to secure a flat.

An application is unsuccessful if you did not receive a queue number to book a flat, or the flats have all been booked before your queue number is due.

Build-To-Order (BTO)

The BTO system offers you flexibility in location and timing of your flat purchase. A BTO exercise offers a range of flat types across a few towns.

How the BTO process works

The flat types offered are Community Care Apartments, 2-room Flexi, 3-, 4-, 5-room and 3Gen flats. You may apply for your preferred flat type and town, and a computer balloting will be conducted to determine whether your flat application is successful.

First-timer families enjoy higher priority for BTO flats. Couples comprising a first-timer and second-timer are treated as first-timer families with the same priority benefits and privileges.

Here is an overview of the BTO process:

Overview of BTO process

Distribution of flat supply

More flats are allocated to first-timer families as they have a more pressing need for a home.

For seniors, at least 40% (minimum of 100 units per project) of the public flat supply of 2-room Flexi flats across Standard, Plus and Prime projects are set aside for them. Within this, half in Standard and Plus projects, and a quarter in Prime projects, are set aside for eligible seniors applying under the Senior Priority Scheme (SPS) (near existing home[1]) or Family Care Scheme (FCS) (Proximity). Any unused seniors’ quota will be distributed among the other non-senior households.
[1] For seniors applying a 2-room Flexi flat that is within 4 km of their owner-occupied property (either HDB flat or private residential property).

For second-timer families, up to 20% of the public flat supply will be set aside for them. If there are more second-timer families than the flat supply set aside for them, not all of them will be successful in their flat application.

BTO flat distribution for non-seniors for Standard flats

Flat Type First-timer Families Second-timer Families First-timer Singles
FPPS^ FCS (Proximity)* Others ASSIST FCS (Proximity)* Others FCS (Proximity)* Others
2-room Flexi# 10% 5% 5% 5% 5% 5% 30% 35%
3-room 40% 30% 10% 10% 5% 5% NA NA
4-room and bigger 40% 30% 20% NA 5% 5% NA NA
FPPS – Family and Parenthood Priority Scheme
FCS (Proximity) – Family Care Scheme (Proximity)
ASSIST – Assistance Scheme for Second-Timers (Divorced/Widowed Parents)
^ Within the FPPS quota, first priority is given to FT(PMC)s who apply for a 4-room or smaller flat in Standard projects.
* Within the FCS (Proximity) quota, first priority is given to applicants who apply for a flat to live with their parents/ child.
# For 2-room Flexi flats, the allocation quota will be among the non-senior public supply.

BTO flat distribution for non-seniors for Plus flats

Flat Type First-timer Families Second-timer Families First-timer Singles
FPPS FCS (Proximity)* Others FCS (Proximity)* Others FCS (Proximity)* Others
2-room Flexi# 10% 5% 5% 5% 10% 30% 35%
3-room and bigger 40% 30% 20% 5% 5% NA NA
FPPS – Family and Parenthood Priority Scheme
FCS (Proximity) – Family Care Scheme (Proximity)
* Within the FCS (Proximity) quota, first priority is given to applicants who apply for a flat to live with their parents/ child.
# For 2-room Flexi flats, the allocation quota will be among the non-senior public supply.

BTO flat distribution for non-seniors for Prime flats

Flat Type First-timer Families Second-timer Families First-timer Singles
FPPS FCS (Proximity)* Others FCS (Proximity)* Others FCS (Proximity)* Others
2-room Flexi# 10% 3% 7% 2% 13% 20% 45%
3-room and bigger 40% 20% 30% 3% 7% NA NA
FPPS – Family and Parenthood Priority Scheme
FCS (Proximity) – Family Care Scheme (Proximity)
* Within the FCS (Proximity) quota, first priority is given to applicants who apply for a flat to live with their parents/ child.
# For 2-room Flexi flats, the allocation quota will be among the non-senior public supply.

Allocation of ballot chances

Household Status No. of Ballot Chances
First-Timer (Parents & Married Couples) [FT(PMC)] 3
Other first-timer families/ couples 2
Second-timer families 1
Seniors 1
First-timer singles 1

Additional ballot chances after 2 unsuccessful applications

All first-timer families, including FT(PMC)s, will get 1 additional chance for every subsequent BTO application for a Standard flat, after they have been unsuccessful for 2 or more BTO applications (as a first-timer family) for Standard flats.

No. of Previous Unsuccessful BTO Applications for Standard Flats Typical Chances

Additional Chances

(+1 for every BTO application for Standard flats after 2 unsuccessful BTO applications for Standard flats)

Total Chances
FT(PMC) Non-FT(PMC) FT(PMC) Non-FT(PMC)
(a) (b) (c) (a) + (c) (b) + (c)
0 or 1 3 2 0 3 2
2 3 2 1 4 3
3 3 2 2 5 4
4 3 2 3 5 4

Note: The number of ballot chances will be capped at 5 for FT(PMC)s and 4 for non-FT(PMC) first-timer families.

Additional chances are not given for applications for Plus and Prime BTO flats as the flat supply is limited.

Sale of Balance Flats (SBF)

SBF exercise offers balance flats from earlier BTO exercises, surplus Selective En bloc Redevelopment Scheme (SERS) replacement flats, repurchased flats, etc.

How the SBF process works

A SBF exercise offers a wide range of flat types, locations, and prices. The flat types offered are  Community Care Apartments, 2-room Flexi, 3-, 4-, 5-room, Executive flats, and 3Gen flats. The flats are usually under construction, near completion or completed.

There is often strong interest in SBF flats, and the chances of getting a flat are slim. For a better chance to secure a flat, please apply for a BTO flat in Standard projects.

First-timer families enjoy higher priority for SBF flats. Couples comprising a first-timer and second-timer are treated as first-timer families with the same priority benefits and privileges.

Here is an overview of the SBF process:

Overview of SBF process

Distribution of flat supply

More flats are allocated to first-timer families as they have a more pressing need for a home.

For seniors, at least 40% of the public flat supply of 2-room Flexi flats across Standard, Plus and Prime projects are set aside for them. Within this, half in Standard and Plus projects, and a quarter in Prime projects, are set aside for eligible seniors applying under the Senior Priority Scheme (SPS) (near existing home[1]) or Family Care Scheme (FCS) (Proximity). Any unused seniors’ quota will be distributed among the other non-senior households.
[1] For seniors applying a 2-room Flexi flat that is within 4 km of their owner-occupied property (either HDB flat or private residential property).

For second-timer families, up to 5% of the public flat supply are set aside for them. If there are more second-timer families than the flat supply set aside for them, not all of them will be successful in their flat application.

SBF flat distribution for non-seniors for Standard and Plus flats

Flat Type First-timer Families Second-timer Families First-timer Singles
FPPS FCS (Proximity)* Others FCS (Proximity)* Others FCS (Proximity)* Others
2-room Flexi# 55% 30% 5% 3% 2% 2% 3%
3-room and bigger 60% 30% 5% 3% 2% NA NA
FPPS – Family and Parenthood Priority Scheme
FCS (Proximity) – Family Care Scheme (Proximity)

* Within the FCS (Proximity) quota, first priority is given to applicants who apply for a flat to live with their parents/ child.
# For 2-room Flexi flats, the allocation quota will be among the non-senior public supply.

The distribution for Standard flats will apply to non-Prime Location Public Housing (PLH) flats launched before the October 2024 BTO exercise, when these units are offered for sale in SBF exercises.

SBF flat distribution for non-seniors for Prime flats

Flat Type First-timer Families Second-timer Families First-timer Singles
FPPS FCS (Proximity)* Others FCS (Proximity)* Others FCS (Proximity)* Others
2-room Flexi# 55% 20% 15% 2% 3% 1% 4%
3-room and bigger 60% 20% 15% 2% 3% NA NA
FPPS – Family and Parenthood Priority Scheme
FCS (Proximity) – Family Care Scheme (Proximity)

* Within the FCS (Proximity) quota, first priority is given to applicants who apply for a flat to live with their parents/ child.
# For 2-room Flexi flats, the allocation quota will be among the non-senior public supply.

For 3-room and bigger flats, if there are fewer than 20 units available for public application, all of the flats will be set aside for first-timer families. Second-timer families will be invited to book a flat only if there are remaining flats after all first-timer families have been invited to book a flat.

The distribution for Prime flats will apply to PLH flats launched before the October 2024 BTO exercise, when these units are offered for sale in SBF exercises.

Allocation of ballot chances

Household Status
No. of Ballot Chances
First-Timer (Parents & Married Couples) [FT(PMC)] 3
Other first-timer families/ couples 2
Second-timer families 1
Seniors 1
First-timer singles 1

Additional chances are not given for applications SBF exercises as the flat supply is limited.

Open booking of flats

The open booking of flats offers unselected flats from past SBF exercises. Flat buyers can apply online and receive a queue number for flat booking on a first-come-first-served basis, and book a flat as early as the next working day, where possible.

Here is an overview of the process:

Open booking of flats - May 2023

To allow time for the preparation work, online applications will be suspended prior to each inject of fresh supply of flats or when all the flats are booked. To be notified of the upcoming sales exercises, please subscribe to HDB eAlerts.