General building · Conversions
Garage conversions in Brighton & Hove.
Turn an under-used garage into a home office, studio, music room, gym or extra bedroom — with every trade coordinated by one team from first visit to finished room.
About this service
Garage conversions, done properly.
A garage conversion is one of the most practical ways to add usable space without moving, but it's a proper building project. The floor usually needs raising and insulating, the walls and roof insulating, the garage door replacing with a wall and window, and new electrics, heating and decorating to finish.
That's exactly the kind of job Capstone is set up for. We plan the work, handle the carpentry and building, bring in the electricians, plumbers and plasterers we work with regularly, and run the whole programme so you have one point of contact.
We'll talk you through what's needed for Building Regulations at the start, so there are no surprises later.
Floors, walls & insulation
Raising and insulating the floor, and insulating walls and roof to make the space usable year-round.
Garage door infill
Replacing the garage door with a new wall, window or door.
Electrics & heating
New sockets, lighting and heating by trades we work with regularly, certified where required.
Plastering & decorating
A finished, paint-ready room — not a garage with a carpet.
Fitted storage & joinery
Built-in desks, shelving and storage to make the most of the room.
Specialist rooms
Music rooms, studios and gyms planned around how the space will be used.
Why Capstone
What you can count on.
One point of contact
You deal with Capstone from the first message to the final photo. If the job needs a plumber, electrician, plasterer or decorator as well, we line them up and run the programme — you're not juggling numbers.
A clear, written quote
You get the scope and the price in writing before anything is booked. No vague lines, nothing held back to add on at the end.
Only people we know
Everyone who works on a Capstone job is someone we know personally and have worked alongside. No strangers from a marketplace turning up at your door.
Finished, photographed and followed up
When the work's done you get an invoice and photos of the finished job, and we check in afterwards. If something isn't right, we come back and put it right.
Our work
Recent, related jobs.
What clients say
Real reviews, from Google.
“The guys were exceptional. Arriving at the agreed time, work carried out within our agreed timeframe, finish was outstanding and our house was left in an immaculate state.”
“Charlie and his team have been very helpful and efficient, always get the job done quickly.”
“I had to pass on a decking job recently because I was extremely busy. I trusted Capstone to take it on. They smashed it. Proper tidy work. The client was buzzing, no messing about. It's refreshing having another company you can genuinely rely on when you're overloaded. I'd confidently recommend them to anyone. It's a 10/10 from me.”
Questions
Garage conversions: common questions.
How much does a garage conversion cost in Brighton?
It depends on the size of the garage, its condition, what the room will be used for and the level of finish. We'll visit, scope it with you and give you a written quote covering the whole job.
Do I need planning permission for a garage conversion?
Many garage conversions don't need planning permission, but some do — for example where permitted development rights have been removed or the property is in a conservation area. Building Regulations approval is normally required. We'll talk it through at the start; it's always worth checking with Brighton & Hove City Council for your property.
How long does a garage conversion take?
It depends on the scope. You'll get a realistic programme with your quote.
Can you build a music room or home studio?
Yes. Rooms like music rooms and studios are planned around how they'll be used, including insulation and layout.
Where we work
Garage conversions across Brighton & Hove, Worthing, Goring-by-Sea, Saltdean, Peacehaven, Newhaven, Lewes, Haywards Heath, Burgess Hill and the rest of East & West Sussex. Not sure if you're in range? Send your postcode with your enquiry and we'll tell you straight away.
Related services
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Tell us about the job.
Send a few details — photos help — and Capstone will come back with a clear, written quote. Free, with no obligation. Covering Brighton & Hove and across Sussex.