House extensions in Preston
We design and build house extensions for homes in Preston and the surrounding Lancashire area, with guide prices adjusted for the region.
- Postcode districtsPR1, PR2, PR4, PR5, PR25, PR26
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Planning and building control in Preston
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.
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).
Choosing the right extension in Preston
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.
The types we would usually look at first for a home in Preston are double-storey extensions, kitchen extensions and side return extensions, depending on the garden and how the house is laid out.
Popular extension prices in Preston
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 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
Preston and surrounding towns
Postcode districts we cover around Preston include PR1, PR2, PR4, PR5, PR25, PR26. We also work in nearby Leyland (5 miles), Chorley (9 miles), Blackburn (9 miles), Darwen (11 miles), Lytham St Annes (12 miles). Just over the Greater Manchester border, Horwich is about 13 miles away.
Every extension type in Preston
- Planning permission for extensions · from £300
- Timber frame extensions · from £19,500
- Side return extensions · from £17,000
- Porch extensions · from £3,800
- Annexe extensions · from £52,000
- Bedroom extensions · from £24,500
- Flat roof extensions · from £19,500
- Home office extensions · from £15,000
- Single-storey rear extensions · from £19,500
- Orangery extensions · from £28,500
- Conservatory replacement extensions · from £19,000
- Extensions over a garage · from £22,500
- Utility and boot room extensions · from £13,000
- Pitched roof extensions · from £21,000
- Kitchen extensions · from £25,500
- Side extensions · from £20,500
- Double-storey extensions · from £36,000
- Extension plans and drawings · from £1,100
- Glass box extensions · from £28,500
- Wraparound extensions · from £34,000
- Bungalow extensions · from £24,500
- Building regulations for extensions · from £850
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
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Preston
How much does an extension cost in Preston?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Preston, and the guide-price tool gives a range for your own size and finish in about a minute.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
How long does an extension take in Preston?
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.
Book a free site visit in Preston
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.