Extending your home in Wallington
Every type of house extension in Wallington, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsSM1, SM2, SM5, SM6
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Areas we cover around Wallington
Our survey diary covers Wallington, including SM1, SM2, SM5, SM6. Nearby, we also take on projects in Carshalton (1 mile), Sutton (2 miles), South Croydon (3 miles), Purley (3 miles), Croydon (3 miles). For homes towards Surrey, Banstead is around 4 miles away.
Planning rules in Wallington
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.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Guide prices for Wallington
We publish guide prices so you can budget before anyone visits. For Wallington they are adjusted by ×1.3, the factor we use across London.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
Which extension suits a Wallington home?
In London, space is at a premium and gardens are often short, so side returns, wraparounds and carefully planned rear extensions tend to make the most of every metre.
The types we would usually look at first for a home in Wallington are glass box extensions, wraparound extensions and side return extensions, depending on the garden and how the house is laid out.
Every extension type in Wallington
- Orangery extensions · from £39,000
- Pitched roof extensions · from £28,500
- Bedroom extensions · from £33,500
- Glass box extensions · from £39,000
- Building regulations for extensions · from £1,150
- Conservatory replacement extensions · from £26,000
- Extensions over a garage · from £31,000
- Home office extensions · from £20,500
- Single-storey rear extensions · from £27,000
- Annexe extensions · from £71,500
- Utility and boot room extensions · from £18,000
- Extension plans and drawings · from £1,550
- Side return extensions · from £23,000
- Wraparound extensions · from £46,500
- Porch extensions · from £5,200
- Planning permission for extensions · from £450
- Timber frame extensions · from £27,000
- Flat roof extensions · from £27,000
- Kitchen extensions · from £35,000
- Side extensions · from £28,500
- Bungalow extensions · from £34,000
- Double-storey extensions · from £49,000
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
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 Wallington
How much does an extension cost in Wallington?
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.
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 Wallington, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
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.
Book a free site visit in Wallington
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.