House extensions in Ewell
Looking to extend your home in Ewell? Start here: extension types, guide prices for Ewell, the planning rules that apply and how a project runs.
- Postcode districtsKT17, KT18, KT19
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Planning rules in Ewell
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 return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
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).
Covering Ewell and nearby
Postcode districts we cover around Ewell include KT17, KT18, KT19. The same team covers Epsom (2 miles), Banstead (3 miles), Leatherhead (5 miles), Esher (5 miles), East Molesey (5 miles), all within easy reach. Worcester Park, in Greater London, is roughly 2 miles from Ewell and also on our list.
Which extension suits a Ewell 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.
The types we would usually look at first for a home in Ewell are wraparound extensions, single-storey rear extensions and double-storey extensions, depending on the garden and how the house is laid out.
Ewell extension prices at a glance
We publish guide prices so you can budget before anyone visits. For Ewell they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
All extension types we build in Ewell
- Extensions over a garage · from £26,500
- Orangery extensions · from £33,500
- Home office extensions · from £17,500
- Porch extensions · from £4,450
- Wraparound extensions · from £40,000
- Bungalow extensions · from £29,000
- Conservatory replacement extensions · from £22,000
- Planning permission for extensions · from £350
- Bedroom extensions · from £29,000
- Double-storey extensions · from £42,500
- Extension plans and drawings · from £1,300
- Kitchen extensions · from £30,000
- Single-storey rear extensions · from £23,500
- Flat roof extensions · from £23,500
- Timber frame extensions · from £23,500
- Building regulations for extensions · from £1,000
- Side extensions · from £24,500
- Side return extensions · from £20,000
- Glass box extensions · from £33,500
- Annexe extensions · from £61,500
- Utility and boot room extensions · from £15,500
- Pitched roof extensions · from £24,500
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Ewell
How much does an extension cost in Ewell?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Ewell, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Ewell?
Yes, including the surrounding parts of Surrey. Site visits are free and there is no obligation.
Do I need planning permission for an extension in Ewell?
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.
Book a free site visit in Ewell
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.