Extensions in Altrincham: design, planning and build
Looking to extend your home in Altrincham? Start here: extension types, guide prices for Altrincham, the planning rules that apply and how a project runs.
- Postcode districtsM23, M33, WA14, WA15
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Areas we cover around Altrincham
Site visits are available across Altrincham (M23, M33, WA14, WA15). The same team covers Sale (3 miles), Urmston (4 miles), Stretford (5 miles), Irlam (5 miles), Cheadle Hulme (7 miles), all within easy reach. Just over the Cheshire border, Wilmslow is about 6 miles away.
What works best for Altrincham houses?
The North West has a high share of Victorian and Edwardian terraces with rear yards and outriggers, plus large areas of inter-war semis in the suburbs.
For many houses here, kitchen extensions, double-storey extensions or single-storey rear extensions gives the most useful space for the budget.
Planning rules in Altrincham
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 Altrincham
Use these Altrincham 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) |
|---|---|---|
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
Every extension type in Altrincham
- Bedroom extensions · from £24,500
- Side extensions · from £20,500
- Building regulations for extensions · from £850
- Glass box extensions · from £28,500
- Flat roof extensions · from £19,500
- Utility and boot room extensions · from £13,000
- Home office extensions · from £15,000
- Pitched roof extensions · from £21,000
- Double-storey extensions · from £36,000
- Extension plans and drawings · from £1,100
- Annexe extensions · from £52,000
- Wraparound extensions · from £34,000
- Timber frame extensions · from £19,500
- Orangery extensions · from £28,500
- Kitchen extensions · from £25,500
- Porch extensions · from £3,800
- Side return extensions · from £17,000
- Conservatory replacement extensions · from £19,000
- Extensions over a garage · from £22,500
- Single-storey rear extensions · from £19,500
- Planning permission for extensions · from £300
- Bungalow extensions · from £24,500
Free site visit
We visit your Altrincham home, measure up, talk through what you want and check the planning position.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
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 Altrincham
How much does an extension cost in Altrincham?
Using our North West England factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.
Do you cover all of Altrincham?
Yes, including the surrounding parts of Greater Manchester. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Altrincham, and the guide-price tool gives a range for your own size and finish in about a minute.
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 Altrincham
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.