Extending your home in Potters Bar
More space without moving: we plan and build extensions across Potters Bar, with one team for the drawings, the council and the build.
- Postcode districtsEN6
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Potters Bar 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).
Guide prices for Potters Bar
Use these Potters Bar guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
Covering Potters Bar and nearby
Our survey diary covers Potters Bar, including EN6. Nearby, we also take on projects in Borehamwood (5 miles), Hatfield (5 miles), Cheshunt (6 miles), Welwyn Garden City (8 miles), St Albans (8 miles). For homes towards Greater London, Barnet is around 3 miles away.
What works best for Potters Bar houses?
The East of England mixes market-town terraces, inter-war semis and modern estates. Clay soils are common in parts of the region, which can affect foundation design.
For many houses here, double-storey extensions, wraparound extensions or bungalow extensions gives the most useful space for the budget.
Extension types and starting prices
- Conservatory replacement extensions · from £21,000
- Double-storey extensions · from £40,000
- Extensions over a garage · from £25,000
- Timber frame extensions · from £22,000
- Glass box extensions · from £31,500
- Bungalow extensions · from £27,500
- Wraparound extensions · from £38,000
- Planning permission for extensions · from £350
- Annexe extensions · from £58,000
- Flat roof extensions · from £22,000
- Side return extensions · from £19,000
- Kitchen extensions · from £28,500
- Pitched roof extensions · from £23,500
- Bedroom extensions · from £27,500
- Building regulations for extensions · from £950
- Utility and boot room extensions · from £14,500
- Home office extensions · from £16,500
- Orangery extensions · from £31,500
- Extension plans and drawings · from £1,250
- Porch extensions · from £4,200
- Side extensions · from £23,000
- Single-storey rear extensions · from £22,000
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Potters Bar
How much does an extension cost in Potters Bar?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Potters Bar, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Potters Bar?
Yes, including the surrounding parts of Hertfordshire. Site visits are free and there is no obligation.
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 Potters Bar
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.