A garage conversion turns an integral or attached garage into a warm, habitable room by insulating the floor, walls and ceiling, replacing the garage door with a wall and window, and adding heating, lighting and finishes.
Planning a garage conversion for a home in Lisburn means making a handful of decisions about materials, layout, finish and timing. We help you work through them at a free survey, then confirm in writing what it will cost for the options you pick. Most projects of this type need 2–6 weeks on site, and we cover every BT17, BT27 and BT28 address as well as the rest of County Antrim.
- Guide price
- £10,500–£24,000 inc VAT
- Time on site
- 2–6 weeks on site
- Postcodes
- BT17, BT27 and BT28
- Planning rules
- Northern Ireland
- Local area
- County Antrim
- Survey
- Free, with a written quote
Garage conversions prices in Lisburn
What will a garage conversion cost in Lisburn? Our guide range is £10,500–£24,000 including VAT. That figure is adjusted for Northern Ireland, about 14% below the national guide, and is intended for planning a budget. A firm written price for your chosen specification follows a free survey at your home.
| Type of job | What it usually involves | Guide in Lisburn |
|---|---|---|
| Integral single garage | A garage within the house footprint, with sound walls and a roof already in place. | £8,600–£15,500 |
| Attached single garage | A garage beside the house that may need roof, wall or floor upgrades. | £12,000–£21,500 |
| Double or detached garage | A larger or separate building, often with a shower room or kitchenette. | £19,000–£38,500 |
The main things that change the figure:
- Garage type: integral, attached or detached
- Condition of the floor, walls, roof and foundations
- Whether a shower room or kitchenette is included
- Heating method and ventilation for the new room
What do you get?
- Infilling the garage door opening with insulated wall and new window
- Insulated walls and ceiling built to building regulations
- New internal door or opening into the house
- Electrics, heating and ventilation by qualified trades, with certificates
- Plastering, skirting and decoration-ready finish
- Building control inspections and completion certificate
Homes in County Antrim
Belfast has long rows of red-brick Victorian terraces, Edwardian villas in the north and south of the city and large post-war estates, while towns such as Ballymena, Antrim, Larne and Carrickfergus mix terraces, semis and newer developments. Dark basalt appears in older rural buildings, and pebbledash or roughcast is a very common finish.
The north coast and glens are exposed to strong winds, salt and frequent rain, which affects render, roofline and outdoor work.
For a garage conversion in Lisburn, this means checking things like wall construction, roof structure and existing services before we put a figure on paper.
Permissions for a garage conversion in Lisburn
Which rules apply depends on where you live. For Lisburn, the answer is Northern Ireland, and the points below reflect that; we verify them with the council before quoting.
In Northern Ireland, converting a garage into living space usually needs no planning permission unless rights were removed by condition.
Building control approval is needed under the Building Regulations (Northern Ireland).
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
How does the job run?
We look at the job
Book a visit and we'll come to you. The survey covers measurements, the state of what's there now and any obvious constraints, so the price that follows is based on your actual home, not an average.
Your fixed price
The quote arrives in writing, not over the phone. It covers the full scope, the finishes you've chosen, any exclusions and the payment schedule, with a fixed price tied to that specification.
Getting ready
Next comes planning the work itself. We set a start date that suits you, line up the right trades, and make sure any approvals for a garage conversion are in place before the first day on site.
Finish and handover
During the work we protect the areas around it and tidy up at the end of each day. Once complete, we check the finish, remove our materials and hand over paperwork such as building control sign-off where it applies.
What you can expect from us
Questions about a garage conversion in Lisburn
Can you combine a garage conversion with other work?
Yes. Because we manage several trades under one contract, we can plan a garage conversion alongside other work on your Lisburn home, such as new windows with rendering, or a kitchen refit with an extension. Combining jobs can reduce repeat set-up such as scaffolding, skips and access, and every element is listed and priced in the same written quote.
Which postcodes in Lisburn do you cover?
We cover BT17, BT27 and BT28, along with the rest of County Antrim. If your postcode is not listed, get in touch anyway: our coverage is UK-wide, and we can usually arrange a survey wherever you live. Enter your postcode in the guide-price tool or contact form and we will confirm.
How much does a garage conversion cost?
A typical single garage conversion costs £10,500–£24,000, depending on whether the garage is integral, attached or detached and what the room is for. Integral garages usually cost least because the walls and roof are already sound. Adding a shower room, upgrading a flat roof or levelling a sloping floor adds cost. As a guide, allow roughly £550–£1,100 per square metre plus fixed costs. We confirm a fixed price after the survey.
Does the floor need raising?
Garage floors are usually lower than the house floor and slope towards the door for drainage. Most conversions raise the floor with a damp-proof membrane, insulation and either a screed or a timber floor, so it lines up with the house and removes the step. The final level depends on ceiling height and the door into the house. We measure both during the survey.
Can I keep some storage space?
Many people keep part of the garage for storage by building a dividing wall, leaving a smaller store at the front behind the existing door and converting the area behind into a room or utility. This keeps the look of the house unchanged and gives you somewhere for bikes and tools. The converted part still needs the same insulation, ventilation and fire separation.
Also covering areas around Lisburn
Coverage for Lisburn spans BT17, BT27 and BT28. Close by, Belfast, Castlereagh and Newtownabbey are covered too, and the rest of our UK-wide area follows the same survey-then-quote process from start to finish.