House Extension Drawings in Sutton

Which postcode districts around Sutton do we cover for house extension work?

Every Sutton postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. Sutton fees below are the statutory England rates for 2026, not house extension estimates.

How does a house extension differ street by street across Sutton?

Roof pitch, wall build-up and plot depth change every few Sutton streets, and each one changes what a house extension can achieve at that address.

• Sutton (SM1) — house extension work in Sutton means edwardian terraces, 1930s semi-detached. Sutton is Edwardian centre, 1930s residential. Edwardian plots here are wider throughout SM1. Sutton Council decides the Sutton application, and Sutton High Street anchors the Sutton location plan.
• Carshalton (SM5) — house extension work in Carshalton means victorian terraces, georgian villas. Carshalton is Victorian and Georgian village. Georgian rear elevations here are usually the listed or locally listed face of the building throughout SM5. Sutton Council decides the Carshalton application, and Carshalton Ponds anchors the Carshalton location plan.
• Cheam (SM2, SM3) — a house extension in Cheam starts from georgian villas, 1930s semi-detached, and Cheam reads as Georgian village, 1930s semi-detached. Georgian rear elevations here are usually the listed or locally listed face of the building in SM2. Sutton Council assesses Cheam house extensions against its own Cheam character guidance, and the location plan we draw for Cheam references Cheam Village.
• Wallington (SM6) — house extension work in Wallington means edwardian villas, 1930s semi-detached. Wallington is Edwardian villas, 1930s semi-detached. Edwardian plots here are wider throughout SM6. Sutton Council decides the Wallington application, and Wallington station anchors the Wallington location plan.
• Worcester Park (KT4) — a house extension in Worcester Park starts from 1930s semi-detached, and Worcester Park reads as 1930s semi-detached. 1930s semis here have the deepest rear gardens in the area in KT4. Sutton Council assesses Worcester Park house extensions against its own Worcester Park character guidance, and the location plan we draw for Worcester Park references Worcester Park station.
• Belmont (SM2) — a house extension in Belmont starts from 1930s semi-detached, and Belmont reads as 1930s semi-detached. 1930s semis here have the deepest rear gardens in the area in SM2. Sutton Council assesses Belmont house extensions against its own Belmont character guidance, and the location plan we draw for Belmont references Belmont station.
• Hackbridge (SM6) — a house extension in Hackbridge starts from edwardian terraces, post-war, and Hackbridge reads as Edwardian terraces, post-war. Edwardian plots here are wider in SM6. Sutton Council assesses Hackbridge house extensions against its own Hackbridge character guidance, and the location plan we draw for Hackbridge references Hackbridge station.

Does Sutton planning policy restrict a house extension?

How designation changes a Sutton house extension: Sutton Council maintains 17 conservation areas, including Sutton Central, Carshalton Village, Beddington Park. Inside any of them a Sutton house extension cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Cheam Village sets the tone for Sutton casework.

Article 4 and your Sutton house extension: Sutton Council has made no borough-wide direction, so permitted development for a house extension in Sutton generally survives outside Sutton conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a KT4 owner records that a house extension was lawful.

Sutton housing stock: 1930s semi-detached dominates; Edwardian terraces and villas in Sutton central; Victorian cottages in Carshalton; post-war in Hackbridge. Outer south London suburban; generally permissive; Carshalton and Cheam conservation areas add heritage in pockets. Read that before choosing a house extension route in Sutton — construction, not postcode, sets what is achievable. Sutton Council charges £548 for a householder application and has 8 weeks to determine it.

What happens if a Sutton property sits on a boundary?

• Merton — adjoining Sutton, with 28 conservation areas centred on SW16. A house extension on the far side of the Sutton line is determined by Merton Council, so the Sutton quote for house extensions is checked against Merton guidance before it is issued.
• Croydon — adjoining Sutton, with 24 conservation areas centred on CR0. A house extension on the far side of the Sutton line is determined by Croydon Council, so the Sutton quote for house extensions is checked against Croydon guidance before it is issued.
• Kingston upon Thames — the Kingston upon Thames boundary runs against Sutton, so a house extension a street from Sutton is decided by Kingston Council instead. Kingston upon Thames runs 22 conservation areas across KT1 and its neighbours, which is why house extensions priced for Sutton are re-checked against Kingston upon Thames policy whenever the Sutton address sits on that edge.

Sources for this Sutton house extension page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.