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A scheme that allows 3-room or smaller flats to be combined into a jumbo unit is being reviewed, the Housing Board said on Sept 25, 2026.
The review comes after a jumbo flat in Telok Blangah – created by merging two three-room flats – was put up for sale at $2.18 million on Sept 19, 2026. People later raised their concerns about the listing to HDB.
6 Things About HDB Jumbo Flats
Here’s a closer look at the conversion scheme and HDB jumbo flats.
How did HDB jumbo flats come about?
In the 1980s, there were three- and four-room flats that were left unsold after completion due to low demand. To deal with the oversupply, HDB in 1989 combined the flats into larger ones by knocking down the wall between them.
Woodlands was the first town to have such flats. The others are in towns like Yishun, Jurong East, Bedok and Tampines.
The units can range from 1,400 sq ft to over 2,000 sq ft.
House Tour: Huge Mediterranean-style jumbo HDB flat in Woodlands
What is the conversion scheme?
The conversion scheme was introduced in 1993 and allows eligible owners who require more living space to combine their flat with a next-door unit to form a larger flat.
They must get HDB to make an assessment on the structural feasibility of combining the units before submitting their purchase application.
If that is approved, they can combine the two units into a single flat under one lease.
The combined flat can be sold on the open market after meeting the five-year minimum occupation period (MOP).
The owner must engage a registered renovation contractor to create at least one opening of at least 1m by 2m between the units.
A licensed contractor also needs to be hired to remove PUB meters for electricity, water and gas supply for one of the two units.
House Tour: An industrial-style Woodlands HDB Jumbo flat with five bedrooms by interior designer Prozfile
What are the eligibility conditions to form a jumbo flat?
The household must comprise a married couple or a family of parents and children to form a family nucleus.
Singles and joint singles are not eligible.
How long is the MOP?
Owners can sell their jumbo flat only after fulfilling the five-year MOP from the date of the second flat’s purchase.
This means that even if they have been living in their HDB flat for 10 years before buying the neighbouring unit, they must live in the combined unit for another five years before they can sell it.
The open concept in this Jumbo HDB (3-room and 4-room merged) was taken to the extreme in this abode. Even the sole bedroom was left without any doors or walls to fully enclose it. The closest thing to privacy for the room is achieved with bamboo blinds. Renovation cost $64,000 excluding furniture.
Can a jumbo flat be split into two units?
No. Once HDB has given approval to combine the flats, the unit must remain as one converted flat.
How many jumbo flats are there?
There are an estimated 2,900 jumbo flats in Singapore, out of about 1.1 million HDB flats.
This article was first published in The Straits Times.