Wallasey house extensions
Planning an extension in Wallasey? Compare extension types, see guide prices adjusted for Wallasey and book a free site visit.
- Postcode districtsCH41, CH43, CH44, CH45, CH46, CH49
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Which extension suits a Wallasey home?
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.
Start by comparing side return extensions, kitchen extensions and double-storey extensions: between them they cover most of the layouts we see requested for houses like these.
Planning and building control in Wallasey
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).
Wallasey extension prices at a glance
Use these Wallasey 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 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
Wallasey and surrounding towns
We cover Wallasey and the postcode districts CH41, CH43, CH44, CH45, CH46, CH49. The same team covers Birkenhead (3 miles), Bootle (4 miles), Liverpool (4 miles), Litherland (4 miles), Bebington (5 miles), all within easy reach. Just over the Cheshire border, Ellesmere Port is about 12 miles away.
Choose an extension type
- Utility and boot room extensions · from £13,000
- Single-storey rear extensions · from £19,500
- Flat roof extensions · from £19,500
- Porch extensions · from £3,800
- Orangery extensions · from £28,500
- Annexe extensions · from £52,000
- Bungalow extensions · from £24,500
- Extension plans and drawings · from £1,100
- Kitchen extensions · from £25,500
- Wraparound extensions · from £34,000
- Timber frame extensions · from £19,500
- Building regulations for extensions · from £850
- Glass box extensions · from £28,500
- Pitched roof extensions · from £21,000
- Conservatory replacement extensions · from £19,000
- Planning permission for extensions · from £300
- Extensions over a garage · from £22,500
- Side return extensions · from £17,000
- Side extensions · from £20,500
- Home office extensions · from £15,000
- Double-storey extensions · from £36,000
- Bedroom extensions · from £24,500
Free site visit
We visit your Wallasey home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
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 Wallasey
How much does an extension cost in Wallasey?
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 Wallasey?
Yes, including the surrounding parts of Merseyside. Site visits are free and there is no obligation.
Do I need planning permission for an extension in Wallasey?
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.
How long does an extension take in Wallasey?
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.
Book a free site visit in Wallasey
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.