Singapore HDB Classification

HDB (Housing Development Board) builds and sells a variety of units to cater to different family sizes and budgets. All HDB flat types are meticulously designed to be functional, comfortable, and meet different housing needs.
In addition, there are various units available for sale on the open market.

The resale unit may not offer certain features, such as bomb shelters and master bedrooms with attached bathrooms.

Source:

①https://www.hdb.gov.sg
②https://www.hdb.gov.sg/residential/buying-a-flat/finding-a-flat/types-of-flats

1. 2-Room Flexi HDB Flat

There are two types of two-room flexi units: 1. Area of 36 square meters (387.5 square feet)2. Approximately 45 square meters (484.4 square feet). This HDB flat is suitable for budget-conscious and older homebuyers. Seniors aged 65 and above can choose to buy such properties, with leases ranging from 15 to 35 years (in increments of 5 years), which can be extended up to the age of 95 for the buyer and their spouse.

HDB Functions:

● One bedroom
● One bathroom
● Kitchen
● Storage room and household shelter

2. 3-room HDB flats

The unit has an area of approximately 60 square meters (645.8 square feet) to 65 square meters (699.6 square feet) and features two bedrooms, one of which is the master bedroom with an en-suite bathroom. This unit is suitable for small families with limited budgets.

HDB Functions:

● Two bedrooms
● Kitchen
● Living and dining area
● Common bathroom
● Clothes drying area
● Storage room and household shelter

3. 4-room HDB flats

The unit has an area of approximately 90 square meters (968.8 square feet) to 93 square meters (1,001 square feet) and comes equipped with three bedrooms, one of which is the master bedroom with an en-suite bathroom. This unit is suitable for expectant parents.

HDB Functions:

● Three bedrooms
● Living and dining area
● Kitchen
● Common bathroom
● Clothes drying area
● Storage room and household shelter  

4. Five-Room Flat

These HDB flats have an area of about 110 square meters (1184 square feet) to 112 square meters (1205 square feet) and are ideal for families with more members. They come with three bedrooms, including a master bedroom with an en-suite bathroom.

HDB Functions:

● Three bedrooms
● Living and dining area
● Kitchen
● Common bathroom
● Clothes drying area
● Storage room and household shelter

5. 3-Generation Flat

To cater to the housing needs of multi-generational families, HDB launched its first three-generation apartment type in Sengkang in 2013, which is the second most common type of HDB housing currently available and also the type with the most room types. Measuring 1,237.8 square feet (115 square meters), it includes a total of four bedrooms, with two of them having en-suite bathrooms.

HDB Functions:

● Four bedrooms
● Living and dining area
● Kitchen
● Common bathroom
● Clothes drying area
● Storage room and household shelter

6. Executive Flat (Apartment-style HDB)

The unit has an area of 130 square meters (1,399.3 square feet) and is the largest among the HDB flats currently available. There are a total of three bedrooms, including a master bedroom with an en-suite bathroom. There is also a space that can be used as a study, and some units have a balcony.

HDB Functions:

● Living Area
● Dining Area
● Kitchen
● Public Bathroom
● Storage Room and household shelter  

7. Private Executive Housing (DBSS)

In 2005, the HDB launched private executive flats (Design, Build and Sell Scheme, or DBSS) units, which were public housing units built by private developers.

HDB Functions:

● Four bedrooms
● Large living space
● Public facilities such as a barbecue area and a multi-purpose sports field

8. Double-Storey Apartment Terrace Houses (Executive Maisonette)

A dual-storey apartment-type HDB is a type of HDB that is no longer being built and has been replaced by executive condominiums (ECs). Therefore, the supply of dual-storey apartment-type HDBs in Singapore is limited and mainly concentrated in mature towns such as Ang Mo Kio, Bishan, Bedok, Bukit Panjang, Bukit Batok, Choa Chu Kang, Hougang, Pasir Ris, Queenstown, Serangoon, and Sembawang.

HDB Functions:

● Two-story building
● Large size
● Equipped with three bathrooms
● Balcony space

9. "Jumbo flat"

"Premium" HDB units typically have an area of 1,339.6 square feet to 1,700 square feet (133.96 square meters to 170 square meters), as they are combinations of two three-bedroom or four-bedroom units. Therefore, such units at least consist of seven spacious rooms (at least larger than HDB units), and some "Premium" HDB apartments also come with a balcony.

HDB Functions:

● Large in size, up to 170 square meters
● Spacious
● Up to seven bedrooms
● Balcony space

10. HDB Terrace House (Terrace HDB)

Terrace HDB flats were built by the Singapore Improvement Trust (SIT) in the 1950s. A total of 285 terrace HDB flats were built in the Whampoa and Queenstown areas. Each one has approximately 84 square meters (900 square feet) of living space spread over two storeys.

HDB Functions:

● The same appearance and feel as a landed property
● Approximately 84 square meters (900 square feet) of living space
● Two-story design
● Located in a prime location, near Queenstown and Whampoa, etc.