Extending your home in Bow
Planning an extension in Bow? Compare extension types, see guide prices adjusted for Bow and book a free site visit.
- Postcode districtsE1, E3, E9, E13, E14, E15
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Covering Bow and nearby
Our survey diary covers Bow, including E1, E3, E9, E13, E14, E15. Neighbouring towns we cover include Stratford (1 mile), Stepney (1 mile), West Ham (2 miles), Canning Town (2 miles), Bethnal Green (2 miles). For homes towards Essex, Waltham Abbey is around 11 miles away.
Do extensions in Bow 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.
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 Bow
Every figure below is a guide for Bow, adjusted for London build costs (×1.3) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
Choosing the right extension in Bow
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.
Start by comparing glass box extensions, side return extensions and kitchen extensions: between them they cover most of the layouts we see requested for houses like these.
Choose an extension type
- Side extensions · from £28,500
- Pitched roof extensions · from £28,500
- Porch extensions · from £5,200
- Single-storey rear extensions · from £27,000
- Extension plans and drawings · from £1,550
- Utility and boot room extensions · from £18,000
- Double-storey extensions · from £49,000
- Timber frame extensions · from £27,000
- Annexe extensions · from £71,500
- Conservatory replacement extensions · from £26,000
- Kitchen extensions · from £35,000
- Extensions over a garage · from £31,000
- Building regulations for extensions · from £1,150
- Bedroom extensions · from £33,500
- Glass box extensions · from £39,000
- Planning permission for extensions · from £450
- Orangery extensions · from £39,000
- Bungalow extensions · from £34,000
- Home office extensions · from £20,500
- Wraparound extensions · from £46,500
- Flat roof extensions · from £27,000
- Side return extensions · from £23,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
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
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 Bow
How much does an extension cost in Bow?
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 Bow?
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 Bow, 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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Bow
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.