House extensions in Chessington
From a small utility to a two-storey addition, we take on house extensions throughout Chessington, starting with a free visit and a planning check.
- Postcode districtsKT6, KT9
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Chessington and surrounding towns
Our survey diary covers Chessington, including KT6, KT9. The same team covers Hook (0 miles), Surbiton (2 miles), Worcester Park (3 miles), New Malden (3 miles), Hampton (4 miles), all within easy reach. For homes towards Surrey, Ewell is around 3 miles away.
Which extension suits a Chessington home?
Across London, terraced houses with narrow side returns and tight access are the norm, which shapes everything from party wall notices to how materials reach the back garden.
Depending on the plot, glass box extensions and side return extensions are often the strongest options, with kitchen extensions worth considering where there is room.
Approvals for an extension in Chessington
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).
Guide prices for Chessington
Use these Chessington 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 | £34,000 – £43,000 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
Choose an extension type
- Orangery extensions · from £39,000
- Building regulations for extensions · from £1,150
- Side extensions · from £28,500
- Timber frame extensions · from £27,000
- Extension plans and drawings · from £1,550
- Extensions over a garage · from £31,000
- Flat roof extensions · from £27,000
- Bungalow extensions · from £34,000
- Home office extensions · from £20,500
- Glass box extensions · from £39,000
- Pitched roof extensions · from £28,500
- Double-storey extensions · from £49,000
- Conservatory replacement extensions · from £26,000
- Utility and boot room extensions · from £18,000
- Annexe extensions · from £71,500
- Kitchen extensions · from £35,000
- Bedroom extensions · from £33,500
- Single-storey rear extensions · from £27,000
- Planning permission for extensions · from £450
- Porch extensions · from £5,200
- Wraparound extensions · from £46,500
- Side return extensions · from £23,000
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
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Chessington
How much does an extension cost in Chessington?
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.
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 cover all of Chessington?
Yes, including the surrounding parts of Greater London. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Chessington, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Chessington
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.