Which Kingston upon Thames postcodes does this loft conversion service cover?
Kingston upon Thames by postcode district: the stock we draw there, and the authority validating a loft conversion at each address. Statutory 2026 fees are national rates, shown for completeness and not because we set them.
| Postcode | Area | Dominant stock | What it means for a loft conversion |
|---|
| KT1 | Kingston upon Thames | Georgian fragments, Victorian terraces, 1930s semi-detached | KT1 is Kingston town centre and belongs to Kingston Council throughout. The Old Town streets within it are tight and heavily designated, so check the address against the designation map before assuming a rear dormer is permitted development. |
| KT2 | Kingston / Norbiton | Georgian fragments, Victorian terraces, 1930s semi-detached | KT2 covers Kingston and Norbiton and is Kingston Council's alone. The riverside end matters for anything at ground level: 11.16% of the borough's land sits inside Flood Zone 2, and it is the zone, not the history of the street, that settles whether a Flood Risk Assessment must go in with an application. Rarely an issue for a loft, always worth establishing. |
| KT3 | New Malden | Edwardian villas, 1930s semi-detached | KT3 covers New Malden, all of it Kingston. The housing is largely interwar — 28.0% of the borough's 70,420 dwellings carry a 1930-39 build date (VOA CTSOP4.1, 31 March 2025) — which usually means a hipped roof, and a hip-to-gable rather than a plain rear dormer. |
| KT5 | Surbiton / Tolworth | Edwardian villas, mansion blocks | KT5 takes in part of Surbiton and Tolworth, determined by Kingston under its own Local Plan. Tolworth's later housing sits on regular plots, which usually makes a full-width rear dormer a simpler proposition than on the older stock closer to the town centre. |
| KT6 | Surbiton | Edwardian villas, mansion blocks | KT6 is Surbiton, decided by Kingston. Designations reach across a good deal of this district, and where one applies the loft goes in as a full householder application instead of as a certificate of lawfulness. |
| KT9 | Chessington | 1930s semi-detached | A loft conversion at an KT9 address in Chessington is determined by Kingston Council under its own Local Plan policies for Chessington. |
How does a loft conversion differ street by street across Kingston upon Thames?
Ridge height, roof pitch and plot depth vary street by street across the borough, and each of them changes the amount of floor a conversion is able to return at a given address.
- Kingston (KT1, KT2) — a loft conversion in Kingston starts from georgian fragments, victorian terraces, 1930s semi-detached, and Kingston reads as Georgian and Victorian centre, riverside. Georgian roofs here are shallow and often behind a parapet in KT1. Kingston Council assesses Kingston loft conversions against its own Kingston character guidance, and the location plan we draw for Kingston references Kingston Market.
- Surbiton (KT5, KT6) — loft conversion work in Surbiton means edwardian villas, mansion blocks. Surbiton is Edwardian villas, mansion blocks. Edwardian roofs run deeper front-to-back throughout KT5. Kingston Council decides the Surbiton application, and Surbiton station anchors the Surbiton location plan.
- New Malden (KT3) — a loft conversion in New Malden starts from edwardian villas, 1930s semi-detached, and New Malden reads as Edwardian villas, 1930s semi-detached. Edwardian roofs run deeper front-to-back in KT3. Kingston Council assesses New Malden loft conversions against its own New Malden character guidance, and the location plan we draw for New Malden references New Malden High Street.
- Chessington (KT9) — loft conversion work in Chessington means 1930s semi-detached. Chessington is 1930s semi-detached, post-war estates. The 1930s hipped roof here needs a hip-to-gable before a rear dormer works throughout KT9. Kingston Council decides the Chessington application, and Chessington World of Adventures anchors the Chessington location plan.
- Tolworth (KT5, KT6) — a loft conversion in Tolworth starts from 1930s semi-detached, post-war flats, and Tolworth reads as 1930s semi-detached, post-war flats. The 1930s hipped roof here needs a hip-to-gable before a rear dormer works in KT5. Kingston Council assesses Tolworth loft conversions against its own Tolworth character guidance, and the location plan we draw for Tolworth references Tolworth Tower.
- Norbiton (KT2) — a loft conversion in Norbiton starts from victorian terraces, edwardian villas, and Norbiton reads as Victorian terraces, Edwardian villas. The Victorian butterfly and double-pitched roofs on these streets normally clear the 2.2 m head height a dormer conversion needs once the ceiling joists are raised in KT2. Kingston Council assesses Norbiton loft conversions against its own Norbiton character guidance, and the location plan we draw for Norbiton references Norbiton station.
- Coombe (KT2, KT3) — 1930s detached and large semi-detached defines Coombe, where 1930s detached, edwardian villas set what a loft conversion can do. Edwardian roofs run deeper front-to-back across KT2. Any Coombe loft conversion is validated by Kingston Council, with Coombe Hill the usual Coombe reference point on the site plan.
How do conservation areas and Article 4 affect a loft conversion in Kingston upon Thames?
Kingston upon Thames conservation designations: 22 of them, Surbiton, Hampton Wick and Coombe Hill among them. Inside one, the permitted-development route for a loft is gone, and the scheme turns into a £548 householder application determined over 8 weeks in place of the 6-week prior approval at £249. Surbiton is the designation that reshapes the most loft designs, and it usually does it at the front roof slope.
No blanket Article 4 over Kingston upon Thames: Kingston Council has not withdrawn permitted development across Kingston upon Thames, so a loft conversion outside a Kingston upon Thames conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a KT1 owner wants on file.
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 loft conversion 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 loft conversion on the edge of Kingston upon Thames?
- Richmond upon Thames — adjoining Kingston upon Thames, with 72 conservation areas centred on SW13. A loft conversion on the far side of the Kingston upon Thames line is determined by Richmond Council, so the Kingston upon Thames quote for loft conversions is checked against Richmond upon Thames guidance before it is issued.
- Merton — adjoining Kingston upon Thames, with 28 conservation areas centred on SW16. A loft conversion on the far side of the Kingston upon Thames line is determined by Merton Council, so the Kingston upon Thames quote for loft conversions is checked against Merton guidance before it is issued.
- Sutton — adjoining Kingston upon Thames, with 17 conservation areas centred on SM1. A loft conversion on the far side of the Kingston upon Thames line is determined by Sutton Council, so the Kingston upon Thames quote for loft conversions is checked against Sutton guidance before it is issued.
Sources for this Kingston upon Thames loft conversion 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.
