House extensions in Edmonton
Looking to extend your home in Edmonton? Start here: extension types, guide prices for Edmonton, the planning rules that apply and how a project runs.
- Postcode districtsEN1, N9, N13, N17, N18, N21
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Guide prices for Edmonton
Prices on this page use our London factor of ×1.3, 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) |
|---|---|---|
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
Do extensions in Edmonton 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).
Choosing the right extension in Edmonton
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 Edmonton are glass box extensions, side return extensions and wraparound extensions, depending on the garden and how the house is laid out.
Areas we cover around Edmonton
Postcode districts we cover around Edmonton include EN1, N9, N13, N17, N18, N21. We also work in nearby Ponders End (1 mile), Tottenham (2 miles), Enfield (2 miles), Palmers Green (2 miles), Chingford (3 miles). Just over the Essex border, Waltham Abbey is about 5 miles away.
Choose an extension type
- Extensions over a garage · from £31,000
- Utility and boot room extensions · from £18,000
- Single-storey rear extensions · from £27,000
- Planning permission for extensions · from £450
- Building regulations for extensions · from £1,150
- Wraparound extensions · from £46,500
- Glass box extensions · from £39,000
- Home office extensions · from £20,500
- Annexe extensions · from £71,500
- Kitchen extensions · from £35,000
- Orangery extensions · from £39,000
- Extension plans and drawings · from £1,550
- Conservatory replacement extensions · from £26,000
- Timber frame extensions · from £27,000
- Flat roof extensions · from £27,000
- Porch extensions · from £5,200
- Pitched roof extensions · from £28,500
- Bungalow extensions · from £34,000
- Bedroom extensions · from £33,500
- Double-storey extensions · from £49,000
- Side extensions · from £28,500
- Side return extensions · from £23,000
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
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
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 Edmonton
How much does an extension cost in Edmonton?
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 Edmonton?
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 Edmonton, and the guide-price tool gives a range for your own size and finish in about a minute.
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.
How long does an extension take in Edmonton?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Book a free site visit in Edmonton
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.