Chessington — covered by Kingston Council.
Planning permission drawings delivered by an MCIAT chartered team.
Building regulations drawings delivered by an MCIAT chartered team.
Loft conversion drawings delivered by an MCIAT chartered team.
House extension drawings delivered by an MCIAT chartered team.
Mansard roof extensions delivered by an MCIAT chartered team.
Garage conversion drawings delivered by an MCIAT chartered team.
Basement conversion drawings delivered by an MCIAT chartered team.
Structural calculations delivered by an MCIAT chartered team.
Measured building survey delivered by an MCIAT chartered team.
Party wall services delivered by an MCIAT chartered team.
Rear dormer drawings delivered by an MCIAT chartered team.


KT9 primarily covers Chessington in Kingston upon Thames.
Decisions for KT9 are made by Kingston Council. Standard Permitted Development rules apply for most rear extensions and loft conversions on terraced and semi-detached houses, unless the property is in a conservation area, is listed, or sits under an Article 4 Direction. Article 4 in Kingston upon Thames: No.
Building regs from £950. We do not charge hourly. Free site survey across all KT9 addresses.
From first call to planning decision: typically 12–14 weeks. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination. Kingston Council timelines align with the national norm.
Chessington in KT9 is characterised by the housing stock of Kingston upon Thames — broadly edwardian villas in surbiton and new malden.

Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every KT9 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. KT9 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| KT9 | Chessington | 1930s semi-detached | KT9 covers Chessington only; Kingston Council handles the drawing package. |
| KT1 | Kingston upon Thames | Georgian fragments, Victorian terraces, 1930s semi-detached | Adjoining district to KT9, also inside Kingston upon Thames for drawing package purposes. |
| KT2 | Kingston / Norbiton | Georgian fragments, Victorian terraces, 1930s semi-detached | Adjoining district to KT9, also inside Kingston upon Thames for drawing package purposes. |
| KT3 | New Malden | Edwardian villas, 1930s semi-detached | Adjoining district to KT9, also inside Kingston upon Thames for drawing package purposes. |
| KT5 | Surbiton / Tolworth | Edwardian villas, mansion blocks | Adjoining district to KT9, also inside Kingston upon Thames for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few KT9 streets, and each one changes what a drawing package can achieve at that address.
KT9 (Chessington) conservation designations: there are 22 across Kingston Council, Kingston Old Town, Surbiton, Hampton Wick among them. Designation costs a KT9 (Chessington) owner the permitted-development route: a drawing package then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Surbiton is the KT9 (Chessington) designation that most often changes a drawing package design.
Article 4 and your KT9 (Chessington) drawing package: Kingston Council has made no borough-wide direction, so permitted development for a drawing package in KT9 (Chessington) generally survives outside KT9 (Chessington) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a KT9 owner records that a drawing package was lawful.
The building fabric around KT9 (Chessington): 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. A drawing package in KT9 (Chessington) is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Kingston Council.
Sources for this KT9 drawing package 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.
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