Maghull house extensions
More space without moving: we plan and build extensions across Maghull, with one team for the drawings, the council and the build.
- Postcode districtsL29, L31
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Maghull and surrounding towns
Across L29, L31, we can visit, measure and advise. The same team covers Kirkby (3 miles), Litherland (4 miles), Bootle (5 miles), Formby (6 miles), Liverpool (7 miles), all within easy reach. Just over the Lancashire border, Ormskirk is about 4 miles away.
What extensions cost in Maghull
Prices on this page use our North West England factor of ×0.95, 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) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
What works best for Maghull houses?
Across the North West, terraced houses with small rear yards suit compact rear and side return extensions, while suburban semis have room for more.
Depending on the plot, side return extensions and double-storey extensions are often the strongest options, with kitchen extensions worth considering where there is room.
Planning rules in Maghull
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.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Choose an extension type
- Kitchen extensions · from £25,500
- Timber frame extensions · from £19,500
- Side return extensions · from £17,000
- Annexe extensions · from £52,000
- Extensions over a garage · from £22,500
- Single-storey rear extensions · from £19,500
- Extension plans and drawings · from £1,100
- Flat roof extensions · from £19,500
- Double-storey extensions · from £36,000
- Conservatory replacement extensions · from £19,000
- Porch extensions · from £3,800
- Utility and boot room extensions · from £13,000
- Planning permission for extensions · from £300
- Pitched roof extensions · from £21,000
- Bungalow extensions · from £24,500
- Orangery extensions · from £28,500
- Side extensions · from £20,500
- Wraparound extensions · from £34,000
- Home office extensions · from £15,000
- Bedroom extensions · from £24,500
- Building regulations for extensions · from £850
- Glass box extensions · from £28,500
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Maghull
How much does an extension cost in Maghull?
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 I need planning permission for an extension in Maghull?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Maghull, 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.
Do you cover all of Maghull?
Yes, including the surrounding parts of Merseyside. Site visits are free and there is no obligation.
Book a free site visit in Maghull
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.