Cheshunt house extensions
Planning an extension in Cheshunt? Compare extension types, see guide prices adjusted for Cheshunt and book a free site visit.
- Postcode districtsEN7, EN8, EN10
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
What works best for Cheshunt houses?
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
For many houses here, bungalow extensions, single-storey rear extensions or wraparound extensions gives the most useful space for the budget.
Where we work near Cheshunt
Site visits are available across Cheshunt (EN7, EN8, EN10). Neighbouring towns we cover include Hoddesdon (4 miles), Potters Bar (6 miles), Hertford (7 miles), Hatfield (9 miles), Welwyn Garden City (10 miles). Just over the Essex border, Waltham Abbey is about 1 mile away.
Approvals for an extension in Cheshunt
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).
Popular extension prices in Cheshunt
We publish guide prices so you can budget before anyone visits. For Cheshunt they are adjusted by ×1.06, the factor we use across East of England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
| Double-storey extensions | 32 m² | £61,000 – £80,000 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
Choose an extension type
- Pitched roof extensions · from £23,500
- Bedroom extensions · from £27,500
- Planning permission for extensions · from £350
- Single-storey rear extensions · from £22,000
- Bungalow extensions · from £27,500
- Orangery extensions · from £31,500
- Home office extensions · from £16,500
- Conservatory replacement extensions · from £21,000
- Extension plans and drawings · from £1,250
- Porch extensions · from £4,200
- Flat roof extensions · from £22,000
- Timber frame extensions · from £22,000
- Kitchen extensions · from £28,500
- Annexe extensions · from £58,000
- Side extensions · from £23,000
- Double-storey extensions · from £40,000
- Wraparound extensions · from £38,000
- Side return extensions · from £19,000
- Utility and boot room extensions · from £14,500
- Building regulations for extensions · from £950
- Glass box extensions · from £31,500
- Extensions over a garage · from £25,000
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Cheshunt
How much does an extension cost in Cheshunt?
Using our East of England factor (×1.06), a standard-spec single-storey extension of 20 m² is a guide £43,000 to £55,500 including VAT, and a 32 m² two-storey extension £61,000 to £80,000. Your written price follows the survey.
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 I need planning permission for an extension in Cheshunt?
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.
How long does an extension take in Cheshunt?
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 Cheshunt
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.