What is a barn conversion?
A barn conversion turns an agricultural or rural building into a home while keeping its character: the brick or stone walls, roof timbers and large openings. It involves structural repair, insulation, new services and often a new floor slab.
How much does a barn conversion cost in Lancashire?
In Lancashire, a barn conversion typically costs £1,700–£2,800 per m² of floor area, including VAT at usually 5% (reduced rate for creating a new dwelling). For a typical 150 m² project that is roughly £255,000–£420,000. That range is adjusted for the North West, where domestic building work typically costs around 6% below the national average. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| Smaller project (105 m²) | £178,500–£294,000 |
| Typical project (150 m²) | £255,000–£420,000 |
| Larger project (210 m²) | £357,000–£588,000 |
| Rate per m² | £1,700–£2,800 |
The main things that change the cost:
- Condition of the existing structure
- Insulation approach
- Planning conditions and ecology
- Access to the site
Use the guide price tool to see how size and specification change the figure, then ask for a written, itemised quote.
Do you need planning permission for a barn conversion in Lancashire?
Approvals for a barn conversion in Lancashire follow the rules for England. In England converting an agricultural building into a home needs either full planning permission or prior approval under Class Q of the permitted development rules, which limits floor space and the number of homes. Listed barns also need listed building consent.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
We check this for your address before design work starts, so there are no surprises later.
What we handle
Handled as part of most barn conversions:
- Planning or prior approval application
- Services, drainage and septic or treatment plant
- Insulation that respects the existing fabric
- Ecology and bat survey coordination
- Structural repairs and new floor slab
- New roof covering where needed
How long does it take?
The build itself usually takes 6 to 12 months on site depending on condition. Design and approvals come first and typically take 4 to 9 months, depending on the approval route.
Building in Lancashire
Terraced streets across the North West often suit rear dormers and single-storey kitchen extensions.
Towns we cover in Lancashire include Preston, Burnley, Blackburn, Blackpool, Fylde and Rossendale.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about barn conversions in Lancashire
How long does a barn conversion take?
Typically 6 to 12 months on site, depending on the building’s condition.
Do I need planning permission for a barn conversion?
Yes. A barn conversion needs planning permission or, in England only, prior approval under the agricultural permitted development rules where the building qualifies. Listed barns also need listed building consent.
How much does a barn conversion cost in Lancashire?
In Lancashire, a barn conversion typically costs £1,700–£2,800 per m² of floor area, including VAT at usually 5% (reduced rate for creating a new dwelling). A typical 150 m² project comes to roughly £255,000–£420,000. Your fixed price depends on the survey and drawings.
Do you build barn conversions in Lancashire?
Yes. We build barn conversions across Lancashire, including postcodes BB1, BB10, BB11, BB12 and BB18. Every project starts with a free home visit.
What about drainage without mains sewer?
A sewage treatment plant can be installed, subject to the environmental regulator’s rules where you live.