Extensions in Stanley: design, planning and build
More space without moving: we plan and build extensions across Stanley, with one team for the drawings, the council and the build.
- Postcode districtsDH9
- Price regionNorth East England (×0.91)
- Planning rulesEngland
- Site visitFree, no obligation
Guide prices for Stanley
Prices on this page use our North East England factor of ×0.91, 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) |
|---|---|---|
| Orangery extensions | 16 m² | £40,500 – £51,000 |
| Kitchen extensions | 20 m² | £38,000 – £48,500 |
| Extensions over a garage | 12 m² | £22,500 – £29,500 |
| Conservatory replacement extensions | 14 m² | £27,000 – £35,500 |
| Single-storey rear extensions | 20 m² | £37,000 – £47,500 |
| Wraparound extensions | 25 m² | £52,000 – £66,000 |
Do extensions in Stanley 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).
Where we work near Stanley
Our survey diary covers Stanley, including DH9. Nearby, we also take on projects in Chester-le-Street (5 miles), Consett (5 miles), Durham (8 miles), Seaham (14 miles), Bishop Auckland (15 miles). Gateshead, in Tyne and Wear, is roughly 8 miles from Stanley and also on our list.
What works best for Stanley houses?
Across the North East, houses often have rear yards or modest gardens, so compact, well-lit single-storey extensions make the biggest difference.
Depending on the plot, utility and boot room extensions and kitchen extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Every extension type in Stanley
- Glass box extensions · from £27,000
- Wraparound extensions · from £32,500
- Double-storey extensions · from £34,500
- Extension plans and drawings · from £1,050
- Building regulations for extensions · from £800
- Kitchen extensions · from £24,500
- Utility and boot room extensions · from £12,500
- Orangery extensions · from £27,000
- Single-storey rear extensions · from £19,000
- Porch extensions · from £3,600
- Bedroom extensions · from £23,500
- Bungalow extensions · from £23,500
- Extensions over a garage · from £21,500
- Side return extensions · from £16,000
- Side extensions · from £20,000
- Pitched roof extensions · from £20,000
- Home office extensions · from £14,500
- Annexe extensions · from £50,000
- Conservatory replacement extensions · from £18,000
- Planning permission for extensions · from £300
- Flat roof extensions · from £19,000
- Timber frame extensions · from £19,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
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 Stanley
How much does an extension cost in Stanley?
Using our North East England factor (×0.91), a standard-spec single-storey extension of 20 m² is a guide £37,000 to £47,500 including VAT, and a 32 m² two-storey extension £52,000 to £68,500. Your written price follows the survey.
How long does an extension take in Stanley?
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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Book a free site visit in Stanley
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.