Extending your home in Leytonstone
Looking to extend your home in Leytonstone? Start here: extension types, guide prices for Leytonstone, the planning rules that apply and how a project runs.
- Postcode districtsE7, E10, E11, E15, E17, E18
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Popular extension prices in Leytonstone
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) |
|---|---|---|
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
Covering Leytonstone and nearby
Our survey diary covers Leytonstone, including E7, E10, E11, E15, E17, E18. Neighbouring towns we cover include Walthamstow (2 miles), Manor Park (2 miles), Stratford (2 miles), West Ham (2 miles), Ilford (3 miles). Waltham Abbey, in Essex, is roughly 8 miles from Leytonstone and also on our list.
Choosing the right extension in Leytonstone
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.
The types we would usually look at first for a home in Leytonstone are side return extensions, kitchen extensions and glass box extensions, depending on the garden and how the house is laid out.
Do extensions in Leytonstone 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 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.
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).
Choose an extension type
- Utility and boot room extensions · from £18,000
- Flat roof extensions · from £27,000
- Extension plans and drawings · from £1,550
- Planning permission for extensions · from £450
- Conservatory replacement extensions · from £26,000
- Pitched roof extensions · from £28,500
- Bedroom extensions · from £33,500
- Orangery extensions · from £39,000
- Kitchen extensions · from £35,000
- Double-storey extensions · from £49,000
- Porch extensions · from £5,200
- Bungalow extensions · from £34,000
- Single-storey rear extensions · from £27,000
- Glass box extensions · from £39,000
- Home office extensions · from £20,500
- Building regulations for extensions · from £1,150
- Side return extensions · from £23,000
- Annexe extensions · from £71,500
- Extensions over a garage · from £31,000
- Wraparound extensions · from £46,500
- Side extensions · from £28,500
- Timber frame extensions · from £27,000
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 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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Leytonstone
How much does an extension cost in Leytonstone?
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 cover all of Leytonstone?
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 Leytonstone?
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 Leytonstone, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Leytonstone
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.