Single-storey rear extensions, lofts and side extensions you can build in Kingston upon Thames without full planning — and the exceptions.
Article 4 directions and trees. The borough holds 114 Article 4 areas in the national register and 7,145 tree preservation zones — the highest of the nine London boroughs that have published to that register. It still issued 969 lawful development certificates in the three years to March 2026.
| Measure | Kingston upon Thames | London |
|---|---|---|
| Article 4 areas in the register | 114 | — |
| Tree preservation zones in the register | 7,145 | most of the 9 boroughs in the tree register |
| Conservation areas (national register) | 28 covering 349 ha | 1,141 |
| Lawful development certificates issued | 969 | — |
| Householder approval rate | 78.4% | 83.0% |
| Certificate application fee | £274 | £548 for a householder application |
| Enforcement notices issued | 3 | 3,554 |
Sources: registers from the MHCLG Planning Data Platform, retrieved 1 September 2026, excluding revoked entries; decision and enforcement figures from MHCLG PS1 and PS2, twelve quarters to March 2026; fees from the Fees for Applications Regulations 2012 as amended, 2026 rates. Work to a protected tree without consent is a criminal offence under section 210 of the Town and Country Planning Act 1990, whatever the permitted development position.
In detailSingle-storey rear extension up to 3m deep (attached house) or 4m (detached); side extension up to half the original width; loft conversion up to 40m³ (terraced) or 50m³ (semi-detached); single-storey outbuilding within the curtilage; replacement windows and doors. All subject to material match, eaves setback (20cm), and not facing a highway.
No. Permitted Development rights apply only to houses (Class C3 dwellings). Flats and maisonettes require full planning for almost every external alteration.
Yes — significantly reduced. In a conservation area: side extensions and two-storey rear extensions are not PD; cladding is not PD; chimney removal needs planning; roof additions are restricted.
An LDC is a formal confirmation from the council that your proposal is lawful PD — recommended before building, useful when selling. Costs around £103 for council fees + drawings.
Yes. Building regulations are entirely separate from planning. Permitted Development removes the planning requirement only — you still need building control sign-off for structure, insulation, fire safety, drainage, and ventilation. We deliver both planning and building regs drawings.



Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every Kingston upon Thames postcode district we draw in, the stock that dominates it and the authority that validates a permitted development scheme there. Kingston upon Thames fees below are the statutory England rates for 2026, not permitted development scheme estimates.
| Postcode | Area | Dominant stock | What it means for a permitted development scheme |
|---|---|---|---|
| KT1 | Kingston upon Thames | Georgian fragments, Victorian terraces, 1930s semi-detached | KT1 covers Kingston upon Thames only; Kingston Council handles the permitted development scheme. |
| KT2 | Kingston / Norbiton | Georgian fragments, Victorian terraces, 1930s semi-detached | Kingston / Norbiton sits wholly inside KT2, so Kingston Council validates every permitted development scheme submitted from an KT2 address. |
| KT3 | New Malden | Edwardian villas, 1930s semi-detached | New Malden sits wholly inside KT3, so Kingston Council validates every permitted development scheme submitted from an KT3 address. |
| KT5 | Surbiton / Tolworth | Edwardian villas, mansion blocks | A permitted development scheme at an KT5 address in Surbiton / Tolworth is determined by Kingston Council under its own Local Plan policies for Surbiton / Tolworth. |
| KT6 | Surbiton | Edwardian villas, mansion blocks | Surbiton sits wholly inside KT6, so Kingston Council validates every permitted development scheme submitted from an KT6 address. |
| KT9 | Chessington | 1930s semi-detached | A permitted development scheme at an KT9 address in Chessington is determined by Kingston Council under its own Local Plan policies for Chessington. |
Roof pitch, wall build-up and plot depth change every few Kingston upon Thames streets, and each one changes what a permitted development scheme can achieve at that address.
How designation changes a Kingston upon Thames permitted development scheme: Kingston Council’s own list names 22 conservation areas, including Hampton Wick, Coombe Hill, Kingston Old Town. Inside any of them a Kingston upon Thames permitted development scheme 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. Coombe Hill sets the tone for Kingston upon Thames casework.
Article 4 and your Kingston upon Thames permitted development scheme: Kingston Council has made no borough-wide direction, so permitted development for a permitted development scheme 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 permitted development scheme 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 permitted development scheme route in Kingston upon Thames — construction, not postcode, sets what is achievable.
Sources for this Kingston upon Thames permitted development scheme 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.

Same-day fixed quote. MCIAT chartered. 98% first-time approval rate.
Start free quoteOr contact us about your project first