Home extensions in Caterham
More space without moving: we plan and build extensions across Caterham, with one team for the drawings, the council and the build.
- Postcode districtsCR3
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Planning and building control in Caterham
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).
What extensions cost in Caterham
Prices on this page use our South East England factor of ×1.12, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
Choosing the right extension in Caterham
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 Caterham are wraparound extensions, orangery extensions and single-storey rear extensions, depending on the garden and how the house is laid out.
Where we work near Caterham
Site visits are available across Caterham (CR3). Neighbouring towns we cover include Redhill (5 miles), Banstead (6 miles), Reigate (6 miles), Horley (8 miles), Ewell (9 miles). Coulsdon, in Greater London, is roughly 4 miles from Caterham and also on our list.
Every extension type in Caterham
- Conservatory replacement extensions · from £22,000
- Porch extensions · from £4,450
- Single-storey rear extensions · from £23,500
- Double-storey extensions · from £42,500
- Glass box extensions · from £33,500
- Timber frame extensions · from £23,500
- Annexe extensions · from £61,500
- Orangery extensions · from £33,500
- Flat roof extensions · from £23,500
- Side return extensions · from £20,000
- Utility and boot room extensions · from £15,500
- Home office extensions · from £17,500
- Side extensions · from £24,500
- Extensions over a garage · from £26,500
- Bedroom extensions · from £29,000
- Planning permission for extensions · from £350
- Kitchen extensions · from £30,000
- Pitched roof extensions · from £24,500
- Extension plans and drawings · from £1,300
- Building regulations for extensions · from £1,000
- Bungalow extensions · from £29,000
- Wraparound extensions · from £40,000
Free site visit
We visit your Caterham home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
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
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Caterham
How much does an extension cost in Caterham?
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.
Do I need planning permission for an extension in Caterham?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Caterham, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Caterham?
Yes, including the surrounding parts of Surrey. Site visits are free and there is no obligation.
Book a free site visit in Caterham
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.