Home extensions in East Molesey
Planning an extension in East Molesey? Compare extension types, see guide prices adjusted for East Molesey and book a free site visit.
- Postcode districtsKT7, KT8
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Covering East Molesey and nearby
Across KT7, KT8, we can visit, measure and advise. Neighbouring towns we cover include West Molesey (1 mile), Esher (2 miles), Walton-on-Thames (3 miles), Sunbury-on-Thames (3 miles), Weybridge (5 miles). Hampton, in Greater London, is roughly 1 mile from East Molesey and also on our list.
Which extension suits a East Molesey home?
In the South East, plenty of houses have already been extended once, which makes checking the remaining permitted development allowance an important early step.
Start by comparing single-storey rear extensions, wraparound extensions and double-storey extensions: between them they cover most of the layouts we see requested for houses like these.
Popular extension prices in East Molesey
Every figure below is a guide for East Molesey, adjusted for South East England build costs (×1.12) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
Do extensions in East Molesey need planning permission?
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).
Every extension type in East Molesey
- Conservatory replacement extensions · from £22,000
- Building regulations for extensions · from £1,000
- Extension plans and drawings · from £1,300
- Pitched roof extensions · from £24,500
- Flat roof extensions · from £23,500
- Glass box extensions · from £33,500
- Side extensions · from £24,500
- Wraparound extensions · from £40,000
- Annexe extensions · from £61,500
- Kitchen extensions · from £30,000
- Timber frame extensions · from £23,500
- Double-storey extensions · from £42,500
- Extensions over a garage · from £26,500
- Orangery extensions · from £33,500
- Side return extensions · from £20,000
- Utility and boot room extensions · from £15,500
- Home office extensions · from £17,500
- Bedroom extensions · from £29,000
- Bungalow extensions · from £29,000
- Planning permission for extensions · from £350
- Porch extensions · from £4,450
- Single-storey rear extensions · from £23,500
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in East Molesey
How much does an extension cost in East Molesey?
Using our South East England factor (×1.12), a standard-spec single-storey extension of 20 m² is a guide £45,500 to £58,500 including VAT, and a 32 m² two-storey extension £64,500 to £84,500. Your written price follows the survey.
How long does an extension take in East Molesey?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Do I need planning permission for an extension in East Molesey?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in East Molesey
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.