What is a wraparound extension?
A wraparound extension combines a side return and a rear extension into one L-shaped addition. It gives the largest possible ground floor, often creating an open-plan kitchen, dining and living space across the whole width of the house.
How much does a wraparound extension cost in Lisburn?
In Lisburn, a wraparound extension typically costs £1,900–£2,750 per m² of floor area, including VAT at 20% (standard rate). For a typical 28 m² project that is roughly £53,000–£77,000. Building costs in Northern Ireland run about 14% below the UK average, and the figures for Lisburn are adjusted to reflect that. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| Smaller project (20 m²) | £38,000–£55,000 |
| Typical project (28 m²) | £53,000–£77,000 |
| Larger project (39 m²) | £74,000–£107,000 |
| Rate per m² | £1,900–£2,750 |
The main things that change the cost:
- Total footprint and the amount of glazing
- Access for materials on terraced streets
- Drainage changes
- Agreements with neighbours on shared walls
A guide range is only a starting point: the guide price tool gives an instant figure for your size, and a free survey turns it into a fixed quote.
Do you need planning permission for a wraparound extension in Lisburn?
Here is how the rules work for a wraparound extension in Northern Ireland. In Northern Ireland a wraparound extension normally needs planning permission and building control approval.
In Northern Ireland building control approval comes from the council, usually through a full plans application or a building notice, with inspections during the work and a completion certificate at the end.
Our first visit includes a check of your planning history, so you know the route before paying for drawings.
What we handle
What we take care of:
- Walls, roof and glazing
- Building control completion
- Design and planning application
- Underfloor heating option, electrics and plastering
- Structural engineer’s design for steels and supports
- Written agreement with neighbours on shared walls
How long does it take?
Allow 12 to 18 weeks on site. Design and approvals come first and typically take 3 to 4 months, depending on the approval route.
Building in Lisburn
Across Northern Ireland, bungalows and chalet bungalows are common, so loft conversions and rear extensions are popular projects.
Projects in Lisburn (BT27 and BT28) are surveyed in person before we quote, so the price reflects your actual property.
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
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 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 wraparound extensions in Lisburn
What about the old back addition?
The side wall of the back addition is usually removed and replaced with a steel beam, so the old kitchen joins the new space.
How much does a wraparound extension cost in Lisburn?
In Lisburn, a wraparound extension typically costs £1,900–£2,750 per m² of floor area, including VAT at 20% (standard rate). A typical 28 m² project comes to roughly £53,000–£77,000. Your fixed price depends on the survey and drawings.
How long does a wraparound extension take in Lisburn?
Typically 12 to 18 weeks on site. Design and approvals beforehand usually take 3 to 4 months.
Can we keep a separate living room?
Yes. Many clients keep the front room separate and open up only the back of the house.
Do I need planning permission for a wraparound extension in Lisburn?
In Northern Ireland a wraparound extension normally needs planning permission and building control approval.
Is a wraparound worth it?
It gives the biggest ground-floor space without going upwards. Whether it adds value depends on your street and house, so we suggest checking local sale prices before committing.