Extensions in Putney: design, planning and build
Planning an extension in Putney? Compare extension types, see guide prices adjusted for Putney and book a free site visit.
- Postcode districtsSW6, SW13, SW14, SW15, SW18, W6
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Choosing the right extension in Putney
In London, space is at a premium and gardens are often short, so side returns, wraparounds and carefully planned rear extensions tend to make the most of every metre.
For many houses here, side return extensions, kitchen extensions or glass box extensions gives the most useful space for the budget.
Where we work near Putney
Postcode districts we cover around Putney include SW6, SW13, SW14, SW15, SW18, W6. We also work in nearby Roehampton (1 mile), Barnes (2 miles), Fulham (2 miles), Earlsfield (2 miles), Wimbledon (3 miles). East Molesey, in Surrey, is roughly 7 miles from Putney and also on our list.
Planning rules in Putney
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Putney extension prices at a glance
We publish guide prices so you can budget before anyone visits. For Putney they are adjusted by ×1.3, the factor we use across London.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
All extension types we build in Putney
- Side extensions · from £28,500
- Pitched roof extensions · from £28,500
- Annexe extensions · from £71,500
- Glass box extensions · from £39,000
- Extension plans and drawings · from £1,550
- Building regulations for extensions · from £1,150
- Double-storey extensions · from £49,000
- Timber frame extensions · from £27,000
- Extensions over a garage · from £31,000
- Utility and boot room extensions · from £18,000
- Home office extensions · from £20,500
- Orangery extensions · from £39,000
- Wraparound extensions · from £46,500
- Porch extensions · from £5,200
- Planning permission for extensions · from £450
- Kitchen extensions · from £35,000
- Flat roof extensions · from £27,000
- Conservatory replacement extensions · from £26,000
- Bedroom extensions · from £33,500
- Single-storey rear extensions · from £27,000
- Bungalow extensions · from £34,000
- Side return extensions · from £23,000
Free site visit
We visit your Putney home, measure up, talk through what you want and check the planning position.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Putney
How much does an extension cost in Putney?
Using our London factor (×1.3), a standard-spec single-storey extension of 20 m² is a guide £53,000 to £68,000 including VAT, and a 32 m² two-storey extension £74,500 to £98,000. Your written price follows the survey.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Putney, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do you cover all of Putney?
Yes, including the surrounding parts of Greater London. Site visits are free and there is no obligation.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Book a free site visit in Putney
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.