Catford house extensions
Every type of house extension in Catford, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsSE4, SE6, SE12, SE13, SE23, SE26
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Catford extension prices at a glance
Use these Catford 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) |
|---|---|---|
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
What works best for Catford houses?
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 Catford are glass box extensions, wraparound extensions and kitchen extensions, depending on the garden and how the house is laid out.
Covering Catford and nearby
Across SE4, SE6, SE12, SE13, SE23, SE26, we can visit, measure and advise. Nearby, we also take on projects in Brockley (1 mile), Blackheath (2 miles), New Cross (2 miles), Greenwich (2 miles), Beckenham (3 miles). Just over the Kent border, Swanley is about 9 miles away.
Do extensions in Catford need planning permission?
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.
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).
Choose an extension type
- Side extensions · from £28,500
- Glass box extensions · from £39,000
- Orangery extensions · from £39,000
- Flat roof extensions · from £27,000
- Porch extensions · from £5,200
- Single-storey rear extensions · from £27,000
- Extension plans and drawings · from £1,550
- Building regulations for extensions · from £1,150
- Pitched roof extensions · from £28,500
- Timber frame extensions · from £27,000
- Bungalow extensions · from £34,000
- Wraparound extensions · from £46,500
- Extensions over a garage · from £31,000
- Side return extensions · from £23,000
- Bedroom extensions · from £33,500
- Utility and boot room extensions · from £18,000
- Kitchen extensions · from £35,000
- Conservatory replacement extensions · from £26,000
- Home office extensions · from £20,500
- Planning permission for extensions · from £450
- Annexe extensions · from £71,500
- Double-storey extensions · from £49,000
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
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Catford
How much does an extension cost in Catford?
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 you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do you cover all of Catford?
Yes, including the surrounding parts of Greater London. Site visits are free and there is no obligation.
Do I need planning permission for an extension in Catford?
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.
Book a free site visit in Catford
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.