Single-storey rear extensions, lofts and side extensions you can build in Richmond upon Thames without full planning — and the exceptions.
Only outside the designations, and there are more of those here than anywhere: 85 conservation areas covering about 3,172 hectares. Where rights do survive, the borough is receptive — it granted 211 larger-extension prior approvals, a 73.0% rate on determined cases.
| Measure | Richmond upon Thames | London |
|---|---|---|
| Conservation areas (national register) | 85 covering 3,172 ha | 1,141 |
| Larger-extension prior approvals granted | 211 | 73.0% of those determined |
| Lawful development certificates issued | 1,323 | — |
| Householder approval rate | 80.2% | 83.0% |
| Decisions made under delegated powers | 99.1% | 97.0% |
| Householder appeals allowed after refusal | 43.8% of 667 | 40.8% of 13,067 |
Sources: conservation areas from planning.data.gov.uk, retrieved 1 September 2026, hectares computed from the published boundaries; decision figures from MHCLG PS1 and PS2, twelve quarters to March 2026; appeals from Planning Inspectorate casework decided 2016–2026. Inside a conservation area Article 2(3) removes Class A side extensions, cladding and Class B roof enlargement entirely, so the designation check settles most Richmond questions before the dimensions are reached.
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.



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Every Richmond upon Thames postcode district we draw in, the stock that dominates it and the authority that validates a permitted development scheme there. Richmond 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 |
|---|---|---|---|
| SW13 | Barnes | Georgian villas, Edwardian terraces | A permitted development scheme at an SW13 address in Barnes is determined by Richmond Council under its own Local Plan policies for Barnes. |
| SW14 | Mortlake / East Sheen | Edwardian villas, 1930s semi-detached | SW14 covers Mortlake / East Sheen only; Richmond Council handles the permitted development scheme. |
| TW1 | Twickenham | Georgian fragments, Victorian terraces, Edwardian villas | TW1 covers Twickenham only; Richmond Council handles the permitted development scheme. |
| TW2 | Twickenham / Whitton | Georgian fragments, Victorian terraces, Edwardian villas | TW2 covers Twickenham / Whitton only; Richmond Council handles the permitted development scheme. |
| TW9 | Richmond / Kew | Georgian terraces, Victorian villas | TW9 covers Richmond / Kew only; Richmond Council handles the permitted development scheme. |
| TW10 | Richmond / Ham | Georgian terraces, Victorian villas | Richmond / Ham sits wholly inside TW10, so Richmond Council validates every permitted development scheme submitted from an TW10 address. |
| TW11 | Teddington | Edwardian villas, Victorian terraces | TW11 covers Teddington only; Richmond Council handles the permitted development scheme. |
| TW12 | Hampton / Hampton Hill | Georgian villas, Edwardian terraces, 1930s semi-detached | Hampton / Hampton Hill sits wholly inside TW12, so Richmond Council validates every permitted development scheme submitted from an TW12 address. |
Roof pitch, wall build-up and plot depth change every few Richmond upon Thames streets, and each one changes what a permitted development scheme can achieve at that address.
Richmond upon Thames conservation designations: there are 72 on Richmond Council’s own list, Kew Green, Hampton Wick, Twickenham Riverside among them. Designation costs a Richmond upon Thames owner the permitted-development route: a permitted development scheme then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Barnes Village is the Richmond upon Thames designation that most often changes a permitted development scheme design.
Richmond upon Thames permitted development status: there is no borough-wide direction from Richmond Council, so a permitted development scheme at a SW13 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a Richmond upon Thames sale to argue it later.
What Richmond upon Thames is built from: Georgian in Richmond Green and Twickenham; Edwardian villas in Barnes and East Sheen; 1930s semi-detached in Whitton; riverside cottages along the Thames. Highest conservation area coverage in London; Royal Parks and Thames corridor add heritage layers; design quality heavily scrutinised. That mix decides the permitted development scheme route in Richmond upon Thames more than the postcode does.
Sources for this Richmond 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.

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