Enfield Lock house extensions
More space without moving: we plan and build extensions across Enfield Lock, with one team for the drawings, the council and the build.
- Postcode districtsEN3
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Areas we cover around Enfield Lock
Site visits are available across Enfield Lock (EN3). The same team covers Ponders End (2 miles), Enfield (3 miles), Chingford (3 miles), Edmonton (3 miles), Woodford Green (5 miles), all within easy reach. Waltham Abbey, in Essex, is roughly 1 mile from Enfield Lock and also on our list.
What works best for Enfield Lock 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.
Depending on the plot, wraparound extensions and side return extensions are often the strongest options, with kitchen extensions worth considering where there is room.
Popular extension prices in Enfield Lock
Every figure below is a guide for Enfield Lock, 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) |
|---|---|---|
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| 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 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
Planning rules in Enfield Lock
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).
All extension types we build in Enfield Lock
- Conservatory replacement extensions · from £26,000
- Side extensions · from £28,500
- Bedroom extensions · from £33,500
- Annexe extensions · from £71,500
- Double-storey extensions · from £49,000
- Building regulations for extensions · from £1,150
- Kitchen extensions · from £35,000
- Planning permission for extensions · from £450
- Bungalow extensions · from £34,000
- Porch extensions · from £5,200
- Home office extensions · from £20,500
- Orangery extensions · from £39,000
- Extensions over a garage · from £31,000
- Single-storey rear extensions · from £27,000
- Timber frame extensions · from £27,000
- Flat roof extensions · from £27,000
- Glass box extensions · from £39,000
- Side return extensions · from £23,000
- Wraparound extensions · from £46,500
- Utility and boot room extensions · from £18,000
- Extension plans and drawings · from £1,550
- Pitched roof extensions · from £28,500
Free site visit
We visit your Enfield Lock home, measure up, talk through what you want and check the planning position.
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
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Enfield Lock
How much does an extension cost in Enfield Lock?
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 Enfield Lock?
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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Enfield Lock, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Enfield Lock
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.