How much for garage with loft?

I have an attached double garage which we'd like to raise the pitched roof on so that we can put in some sort of conversion. The garage isn't converted and I'd like to keep that space for the cars, but the extra room above it would be perfect for an office. How much does a garage with a loft cost now? If it impacts things much, we live in Nottingham

Asked by Luke on 12th Mar 2026
Expert Trade Answers
"Hi steve here.
Its not a straightforward question that i can provide a accurate quote for but to answer it in a general ball park figure.
It depends on specificationsetc . If its just a office and no one is sleeping there then its likely that you wont require a building warrant and planning consent and unlikely that youd require a habitation certificate . The cost for this type of work 30 /£40 thousand however it depends on structural work and clarifying whether the work requires planning and building warrant.
regards.
steve"
Answered on 12th Mar 2026 - Member since Aug 2025 - report
"Hello Luke,
Thank you for the question.
Keep the garage and build room on top may Cost you between £27000 - £40000.
Also please check if you need to apply for planning.
Kind regards,
Said Yazbeck"
Answered on 12th Mar 2026 - Member since Feb 2023 - report
"Hi,

Thank you for your question. Converting the space above a double garage by raising the pitched roof to create a room (such as a home office) is definitely possible, but the cost can vary depending on the existing structure, roof height, and the type of construction.

As a rough guide, projects like this typically range between £30,000 and £60,000+, depending on the structural work required, insulation, stairs access, windows, and the internal finish.

The best next step would be to have a quick look at the garage structure and roof layout to give you a more accurate estimate. If helpful, I’d be happy to arrange a short visit or discuss the details with you.

Kind regards,
Simon"
Answered on 12th Mar 2026 - Member since Nov 2023 - report
Find Tradespeople, compare up to 3 quotes!
It's FREE and there are no obligations
Ask a Trade
Got a question that only a tradesperson can answer? We have thousands of trades ready to answer any question you may have.
Ask your question
Ask a Trade

Are you looking for advice on a DIY project or have a question for our tradespeople?

We'll email your question to tradespeople who are skilled in your chosen category.

Your question will be made public - please do not include any personal details.

{{ first(ask.errors)[0] }}

By continuing you agree to the Community Guidelines.

Report Content

{{ first(reportForm.errors) }}

Thank you

Your report has been created and will be investigated shortly.

Ready to get a price for your home improvement project?
Get started

Over 1 million homeowners and over 50,000 tradespeople
use MyJobQuote nationwide each year