Skip to main content
A Singapore Government Agency Website How to identify
Official website links end with .gov.sg
Government agencies communicate via .gov.sg websites (e.g. go.gov.sg/open). Trusted websites
Secure websites use HTTPS
Look for a lock () or https:// as an added precaution. Share sensitive information only on official, secure websites.

Welcome to our refreshed website!

We've updated the site to make information easier to access and navigate. While some content may have been reorganised, you can browse our updated sections to find what you need.

Urban Redevelopment Authority (URA)

Roof

Find out what you can change at the roof level of your semi-detached house.

Last updated 6 June 2026

Pitched Roof

Isometric view of a house showing building envelope, setback lines, and road buffer/reserve.

The pitched roof shall be contained within the permissible building envelope.

Flat Roof / Terrace

Isometric diagram of a house showing permissible building envelope, setbacks, road buffer, and road reserve line.

Roof with less than 3m below the top extent of the permissible building envelope shall be a RC flat roof only. It must remain non-accessible except for maintenance purpose.

Roof terraces may be proposed on the attic floor. They shall be located at least 3m below the top extent of the permissible building envelope.

Pavilion / Trellis / Canopy

Isometric diagram of a modern house showing the building envelope and an open-sided pavilion.

Pavilion, canopy or trellis may be allowed over the roof terrace provided it is located within the permissible building envelope.

Parapet / Party Wall

Isometric diagram of a house with labelled features: 1.0m high parapet and 1.8m high party wall.

A 1.0m high parapet along the perimeter of the roof terrace/roof garden shall be provided.

A 1.8m party wall shall be provided along the common boundary line of two adjacent semi-detached houses