Semi-detached rear extension in Leyland

How much does a semi-detached rear extension cost in Leyland?

In Leyland, our guide for a semi-detached rear extension is £1,790–£2,910 per square metre including VAT for a standard specification. North West prices sit below our West Midlands baseline; access on terraced streets is the main variable.

We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.

Do you need planning permission for a semi-detached rear extension in Leyland?

Here is how the rules in England apply to a semi-detached rear extension in Leyland.

English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.

A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.

If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.

Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.

What are homes in Leyland like to extend?

Stone and brick terraces are common around Leyland. Where houses back onto a ginnel or alley, deliveries can come in from the rear, which makes the build tidier. Semi-detached houses are common across Lancashire, and their side access makes rear extensions quicker to build.

How a semi-detached rear extension in Leyland comes together

1. Survey visit

   We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.

2. Drawings and budget

   Floor plans and elevations for the options, each with a guide price.

3. Planning and regulations

   We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.

4. Build and sign-off

   We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.

Semi-detached rear extensions near Leyland

From Leyland, the nearest places we also cover are Clayton-le-Woods (0.8 miles) and Chorley (4.4 miles).

• Semi-detached rear extension in Clayton-le-Woods
• Semi-detached rear extension in Chorley
• Semi-detached rear extension in Preston
• Semi-detached rear extension in Horwich
• Semi-detached rear extension in Blackburn

Other work in Leyland:

• Single-storey rear extension
• Two-storey rear extension
• Kitchen-diner rear extension
• Side return extension
• Wraparound extension
• Glazed rear extension

All rear extensions in Leyland