Garage Conversion Costs
Every conversion we do is fixed price, with no hidden extras. A single integral garage starts from £13,225 + VAT (£15,870 inc VAT), so that's a good figure to have in mind. When you're ready, get in touch and we'll pop round to measure up (it only takes about 10 minutes), then you'll get your confirmed written quote within 24 hours.
Book a free measure-up Call 01562 261 071
Guide prices at a glance
Guide prices are for a finished room such as a playroom, TV room, lounge, dining room, home office or study.
Why some quotes come in higher
Our cost sheets are based on the typical garage conversions we see, but every one is a little different in some way. We can give you a guide price, but we can only confirm a fixed price once we've measured up and talked through exactly what you want for your project.
Most conversions become TV rooms, playrooms, dining rooms or home offices, and most integral single garages are pretty similar in size and layout, but no two conversions are exactly the same. These are the usual reasons a quote ends up above the guide price:
Gas or electric meters in the garage
We check whether any meters will need moving. Moving a meter usually costs £1,000 or more. You arrange it through your supplier, who then books the network operator (such as National Grid) to do the work, so we can't price it for you. Contact your supplier for more information. A cheaper option is boxing it into an easy-access cupboard, which we can also do for a boiler or fuse board.
Kitchens, utilities and bathrooms
A room fitted out as a kitchen, utility or bathroom needs a lot more work to get the plumbing and drainage in, and that alters the cost.
Your choice of finish
Different lighting specifications, hardwood windows, triple glazing, flooring and decorating all change the price.
Flat roofs and low headroom
The insulated floor raises the level by about 4 inches. If headroom gets tight we raise the walls by 2 to 3 courses of brick and re-cover the roof in fibreglass or EPDM rubber.
Converting half a double garage
If there's no dividing wall, we build one to keep the new room fire-protected from the remaining garage.
Bigger than a typical garage
Guide prices assume up to 5m x 3m for a single and 5m x 5m for a double.
Want to see what a quote looks like? See a real one: every stage of the work, what isn't included, and the fixed price.
See a sample quote What every guide price includes
- Removal and disposal of the garage door, frame and all waste by skip
- New brickwork under the new front window, matched to your house using a national brick-finding service
- New uPVC window to match your existing windows, in whatever colour you have
- A structural lintel and new doorway through to the house, fitted with a door to match your existing ones
- Three double sockets, a light switch and a central ceiling light point
- A fully insulated, raised floor with a solid flooring base, ready for carpet, vinyl or laminate
- A fully insulated roof area (flat or pitched) to current Building Regulations
- Plasterboarding and skimming throughout
- Softwood or MDF skirting board and architrave where needed
Which garage do you have?
Find your garage below to see what's involved, a guide price, and the full cost sheet to download.
Single integral garage
This is you if:
- The garage sits inside the main footprint of the house
- There's a room (usually a bedroom) directly above it
- There's often a door through from the hallway or kitchen already
Built into the house itself, usually with a room above and often a kitchen behind. These are generally the easiest type of garage to convert.
- From
- £15,870 inc VAT
- Typical size
- Up to 5m x 3m
- Time on site
- 10 working days
Download the single integral cost sheet (PDF) 
Single attached garage with pitched roof
This is you if:
- The garage is joined to the house by one wall
- It has its own sloping, tiled roof
- There's no room above it
- You can often see the roof timbers or trusses from inside
Built onto the side of the house with its own sloping roof, and usually nothing above it. The roof space is often uninsulated with the timbers on show.
- From
- £16,540 inc VAT
- Typical size
- Up to 5m x 3m
- Time on site
- 10 working days
Download the pitched roof cost sheet (PDF) 
Single garage with flat roof
This is you if:
- The garage is joined to the house by one wall
- The roof is flat (usually felt, fibreglass or rubber)
- There's no room above it
- Headroom inside can feel a bit low
Built onto the side of the house with a flat roof and nothing above. Perfectly convertible, but meeting Building Regulations can take a little more work.
- From
- £19,660 inc VAT
- Typical size
- Up to 5m x 3m
- Time on site
- 12-14 working days
Download the flat roof cost sheet (PDF) 
Single garage as part of a double
This is you if:
- You have a double garage (two doors, or one extra-wide door)
- You only want to convert one half
- The other half stays as a garage, storage or bike shed
Converting one half of a double garage, normally the half nearest the house for easy access, and keeping the rest as a garage or storage. Usually straightforward.
- From
- £18,740 inc VAT
- Typical size
- Up to 5m x 3m
- Time on site
- 12-14 working days
Download the part-double cost sheet (PDF) 
Double garage
This is you if:
- You have a double garage and want to convert all of it
- It may be attached to the house or detached
- Sometimes there's a room above one half
Converting the whole of a double garage, whether it's attached to the house or standing on its own. Plenty of space for a large family room, or even a granny flat or annexe.
- From
- £24,000+ inc VAT
- Typical size
- Up to 5m x 5m
- Time on site
- 15-18 working days
Download the double garage cost sheet (PDF) 