How to convert a garage – to make your room work for you

Expand your living area by transforming your garage into a spacious new room

Why should you convert a garage? Converting a garage into usable living space is an affordable and relatively simple job – but before you start, you’ll need to consider the following.

1. The build quality of your garage

Project planning building work

Image credit: David Merewether

Not all garages can be converted – some are old, shoddily built and could be asbestos ridden. However, if yours was professionally built in the last 25 years, is made of brick or block and is structurally sound, there’s a good chance you could convert it with very little fuss. Start by getting advice from a surveyor at the Building Control department of your local council.

2. The practicalities of the job

Garages are often on a different level from the house, so you may need to raise or lower floors or ceilings if you want your new room to flow on from the rest of your home. The garage door will need to be replaced with a window and matching bricks, so make sure your builder has access to materials that blend in with the rest of your house. You’ll need heating and insulation to make it usable all year round; plumbing, lighting and security also need to be assessed.

3. Building regulations


You’ll need to apply to your council for Building Regulations approval. If you live in a conservation area or want to extend the garage,you’ll also need planning permission. Some councils require it if you’ll be substantially changing the exterior of your house.

Planning Portal ( has advice on planning rules and Building Regulations.

4. Getting the work done

If you have an integral garage, the job should be quite simple and could even be taken on by a competent DIYer. If you do it yourself, expect it to cost around £6,000 once it’s been plastered, decorated and furnished. If you need to make structural changes or if your garage is detached, it will be a more complex job involving knocking down walls, for example, and will cost around £12,000 – in this case, you’ll need to contact an architect or a garage conversion company. It can take anything from 10 days to several months to complete, depending on the job.

Make your room work for you

Careful planning is a must to avoid costly mistakes. Think about the following:

1. How will you use the space?

How to convert a garage

Image credit: David Giles

If you’ve earmarked the new room as an office or a hobby room, you may want to keep it separate from your main living space; if it’s going to be a living area or kitchen it will need to flow seamlessly from the rest of the house, so you may need to knock through an interior wall.

2. Think about the door that links the garage with the house

How to convert a garage

Perhaps you could widen it so your new room avoids that thin, boxy feel. French windows that open onto the back garden will flood the room with light and make it feel bigger.

3. Moving a boiler or electricity meter

exposed boiler

Image credit: Design Hunter/npower

Moving the boiler or electricity meter to another room adds thousands of pounds to the cost, so box them in with pale-painted wooden units. Using a pale cream colour on the boxing avoids the stark, narrow feel some garages can suffer from.

4. Use the right materials outside

Avoid spoiling the kerb appeal of your home. Bricks and windows need to be matched as closely as possible to the rest of the house.

Want more project advice? READ: Loft conversions – how to plan and cost your dream space

Will you be converting your garage using these tips? We would love to hear how you got on with your project!

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