Extensions in Leyland: design, planning and build
Looking to extend your home in Leyland? Start here: extension types, guide prices for Leyland, the planning rules that apply and how a project runs.
- Postcode districtsPR5, PR25, PR26
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Leyland 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).
What extensions cost in Leyland
We publish guide prices so you can budget before anyone visits. For Leyland they are adjusted by ×0.95, the factor we use across North West England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
Which extension suits a Leyland home?
Across the North West, terraced houses with small rear yards suit compact rear and side return extensions, while suburban semis have room for more.
The types we would usually look at first for a home in Leyland are kitchen extensions, side return extensions and double-storey extensions, depending on the garden and how the house is laid out.
Areas we cover around Leyland
Postcode districts we cover around Leyland include PR5, PR25, PR26. We also work in nearby Chorley (4 miles), Preston (5 miles), Blackburn (9 miles), Darwen (9 miles), Skelmersdale (11 miles). For homes towards Greater Manchester, Horwich is around 9 miles away.
All extension types we build in Leyland
- Side return extensions · from £17,000
- Single-storey rear extensions · from £19,500
- Double-storey extensions · from £36,000
- Wraparound extensions · from £34,000
- Bungalow extensions · from £24,500
- Pitched roof extensions · from £21,000
- Extension plans and drawings · from £1,100
- Flat roof extensions · from £19,500
- Orangery extensions · from £28,500
- Home office extensions · from £15,000
- Extensions over a garage · from £22,500
- Timber frame extensions · from £19,500
- Annexe extensions · from £52,000
- Porch extensions · from £3,800
- Planning permission for extensions · from £300
- Side extensions · from £20,500
- Building regulations for extensions · from £850
- Bedroom extensions · from £24,500
- Kitchen extensions · from £25,500
- Utility and boot room extensions · from £13,000
- Glass box extensions · from £28,500
- Conservatory replacement 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
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Leyland
How much does an extension cost in Leyland?
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.
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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do I need planning permission for an extension in Leyland?
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.
Book a free site visit in Leyland
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.