Extending your home in Upper Norwood
We design and build house extensions for homes in Upper Norwood and the surrounding Greater London area, with guide prices adjusted for the region.
- Postcode districtsCR7, SE19, SE20, SE25, SE27, SW16
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Upper Norwood extension prices at a glance
We publish guide prices so you can budget before anyone visits. For Upper Norwood they are adjusted by ×1.3, the factor we use across London.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
Choosing the right extension in Upper Norwood
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.
For many houses here, glass box extensions, kitchen extensions or wraparound extensions gives the most useful space for the budget.
Where we work near Upper Norwood
Postcode districts we cover around Upper Norwood include CR7, SE19, SE20, SE25, SE27, SW16. We also work in nearby Norbury (1 mile), South Norwood (1 mile), Streatham (2 miles), Croydon (2 miles), Beckenham (3 miles). For homes towards Surrey, Banstead is around 8 miles away.
Planning rules in Upper Norwood
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 two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
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).
Every extension type in Upper Norwood
- Side return extensions · from £23,000
- Annexe extensions · from £71,500
- Bedroom extensions · from £33,500
- Single-storey rear extensions · from £27,000
- Porch extensions · from £5,200
- Timber frame extensions · from £27,000
- Conservatory replacement extensions · from £26,000
- Utility and boot room extensions · from £18,000
- Side extensions · from £28,500
- Planning permission for extensions · from £450
- Pitched roof extensions · from £28,500
- Glass box extensions · from £39,000
- Home office extensions · from £20,500
- Building regulations for extensions · from £1,150
- Wraparound extensions · from £46,500
- Kitchen extensions · from £35,000
- Flat roof extensions · from £27,000
- Orangery extensions · from £39,000
- Bungalow extensions · from £34,000
- Extensions over a garage · from £31,000
- Double-storey extensions · from £49,000
- Extension plans and drawings · from £1,550
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
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
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
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 Upper Norwood
How much does an extension cost in Upper Norwood?
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.
Do I need planning permission for an extension in Upper Norwood?
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.
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 Upper Norwood?
Yes, including the surrounding parts of Greater London. Site visits are free and there is no obligation.
Book a free site visit in Upper Norwood
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.