House Extension Drawings in Kingston upon Thames

Which Kingston upon Thames postcodes does this house extension service cover?

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

What changes about a house extension in each part of Kingston upon Thames?

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

• Kingston (KT1, KT2) — a house extension in Kingston starts from georgian fragments, victorian terraces, 1930s semi-detached, and Kingston reads as Georgian and Victorian centre, riverside. Georgian rear elevations here are usually the listed or locally listed face of the building in KT1. Kingston Council assesses Kingston house extensions against its own Kingston character guidance, and the location plan we draw for Kingston references Kingston Market.
• Surbiton (KT5, KT6) — Edwardian villas, mansion blocks defines Surbiton, where edwardian villas, mansion blocks set what a house extension can do. Edwardian plots here are wider across KT5. Any Surbiton house extension is validated by Kingston Council, with Surbiton station the usual Surbiton reference point on the site plan.
• New Malden (KT3) — Edwardian villas, 1930s semi-detached defines New Malden, where edwardian villas, 1930s semi-detached set what a house extension can do. Edwardian plots here are wider across KT3. Any New Malden house extension is validated by Kingston Council, with New Malden High Street the usual New Malden reference point on the site plan.
• Chessington (KT9) — a house extension in Chessington starts from 1930s semi-detached, and Chessington reads as 1930s semi-detached, post-war estates. 1930s semis here have the deepest rear gardens in the area in KT9. Kingston Council assesses Chessington house extensions against its own Chessington character guidance, and the location plan we draw for Chessington references Chessington World of Adventures.
• Tolworth (KT5, KT6) — 1930s semi-detached, post-war flats defines Tolworth, where 1930s semi-detached, post-war flats set what a house extension can do. 1930s semis here have the deepest rear gardens in the area across KT5. Any Tolworth house extension is validated by Kingston Council, with Tolworth Tower the usual Tolworth reference point on the site plan.
• Norbiton (KT2) — Victorian terraces, Edwardian villas defines Norbiton, where victorian terraces, edwardian villas set what a house extension can do. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage across KT2. Any Norbiton house extension is validated by Kingston Council, with Norbiton station the usual Norbiton reference point on the site plan.
• Coombe (KT2, KT3) — 1930s detached and large semi-detached defines Coombe, where 1930s detached, edwardian villas set what a house extension can do. Edwardian plots here are wider across KT2. Any Coombe house extension is validated by Kingston Council, with Coombe Hill the usual Coombe reference point on the site plan.

What local planning policy applies to a house extension in Kingston upon Thames?

Kingston upon Thames conservation designations: there are 22 across Kingston Council, Kingston Old Town, Surbiton, Hampton Wick among them. Designation costs a Kingston upon Thames owner the permitted-development route: a house extension then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Kingston Old Town is the Kingston upon Thames designation that most often changes a house extension design.

Article 4 and your Kingston upon Thames house extension: Kingston Council has made no borough-wide direction, so permitted development for a house extension in Kingston upon Thames generally survives outside Kingston upon Thames conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a KT1 owner records that a house extension was lawful.

Kingston upon Thames housing stock: Edwardian villas in Surbiton and New Malden; Victorian terraces in Kingston central; 1930s semi-detached in Chessington and Tolworth; post-war in New Malden. Outer south-west London suburban; generally permissive; riverside conservation areas add character in Kingston town. Read that before choosing a house extension route in Kingston upon Thames — construction, not postcode, sets what is achievable. Kingston Council charges £548 for a householder application and has 8 weeks to determine it.

Who decides a house extension on the edge of Kingston upon Thames?

• Richmond upon Thames — the Richmond upon Thames boundary runs against Kingston upon Thames, so a house extension a street from Kingston upon Thames is decided by Richmond Council instead. Richmond upon Thames runs 72 conservation areas across SW13 and its neighbours, which is why house extensions priced for Kingston upon Thames are re-checked against Richmond upon Thames policy whenever the Kingston upon Thames address sits on that edge.
• Merton — cross the Kingston upon Thames boundary and Merton Council takes the house extension instead, applying 28 conservation areas of its own around SW16. We re-price house extensions at the Kingston upon Thames edge because Merton policy and Kingston upon Thames policy rarely align on house extension depth.
• Sutton — the Sutton boundary runs against Kingston upon Thames, so a house extension a street from Kingston upon Thames is decided by Sutton Council instead. Sutton runs 17 conservation areas across SM1 and its neighbours, which is why house extensions priced for Kingston upon Thames are re-checked against Sutton policy whenever the Kingston upon Thames address sits on that edge.

Sources for this Kingston upon Thames 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.