Extending your home in Epsom
From a small utility to a two-storey addition, we take on house extensions throughout Epsom, starting with a free visit and a planning check.
- Postcode districtsKT17, KT18, KT19, KT21
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Areas we cover around Epsom
We cover Epsom and the postcode districts KT17, KT18, KT19, KT21. We also work in nearby Ewell (2 miles), Banstead (3 miles), Leatherhead (4 miles), Esher (5 miles), East Molesey (6 miles). Just over the Greater London border, Chessington is about 3 miles away.
Planning and building control in Epsom
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 single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
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).
Which extension suits a Epsom home?
The South East has a broad mix of 1930s semis, post-war estates, newer developments and period cottages, and many houses have enough garden for a generous rear extension.
For many houses here, wraparound extensions, single-storey rear extensions or orangery extensions gives the most useful space for the budget.
Guide prices for Epsom
Use these Epsom guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
Every extension type in Epsom
- Bungalow extensions · from £29,000
- Flat roof extensions · from £23,500
- Side return extensions · from £20,000
- Building regulations for extensions · from £1,000
- Pitched roof extensions · from £24,500
- Extensions over a garage · from £26,500
- Conservatory replacement extensions · from £22,000
- Single-storey rear extensions · from £23,500
- Double-storey extensions · from £42,500
- Extension plans and drawings · from £1,300
- Bedroom extensions · from £29,000
- Annexe extensions · from £61,500
- Porch extensions · from £4,450
- Orangery extensions · from £33,500
- Utility and boot room extensions · from £15,500
- Wraparound extensions · from £40,000
- Timber frame extensions · from £23,500
- Side extensions · from £24,500
- Home office extensions · from £17,500
- Planning permission for extensions · from £350
- Glass box extensions · from £33,500
- Kitchen extensions · from £30,000
Free site visit
We visit your Epsom 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
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Epsom
How much does an extension cost in Epsom?
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.
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.
Do I need planning permission for an extension in Epsom?
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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Epsom, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Epsom
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.