Garage Conversion
in Cardiff
Vetted local garage conversion specialists. Free quotes from FMB & CIOB-qualified builders in Cardiff. 3 quotes in 24 hours, no obligation.
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How Much Do Garage Conversion Cost in Cardiff?
Real prices from completed projects in Cardiff and the surrounding area. Costs vary by size, specification and access — use these as a starting guide, then get 3 free quotes for your specific project.
Convert an attached single garage into a habitable room — bedroom, office or playroom. Most fall under permitted development. 6–10 weeks on site.
Get quotes for this →Convert a double garage into a self-contained living space, en-suite annexe or large open-plan room. Strong ROI for £15k–£30k.
Get quotes for this →Convert a detached or outbuilding garage into an annexe, home office or studio. May require planning permission depending on use.
Get quotes for this →Costs depend on size, spec and access. The best way to know your exact price is to compare 3 quotes from vetted local specialists.
Get free quotes →Cardiff pricing note: South Wales building costs run 10–15% below the national average, making it one of the most affordable regions in the UK for home improvements. Cardiff and Newport are well-served by vetted local contractors. Prices shown are indicative ranges for Cardiff and South Wales. Always get at least 3 written quotes before committing to any builder.
Garage Conversion Specialists Who Know Cardiff
Home renovation activity in Cardiff continues to grow year on year. The area's varied housing stock, from older stone-built properties to new-build estates, means there is always strong demand for skilled, experienced local builders.
Before any builder appears on our Cardiff platform, we carry out a full vetting check covering public liability insurance, trade qualifications, company registration and verified customer feedback. Only builders who pass every stage are listed.
Our Cardiff builder network covers extensions, loft conversions, kitchens, bathrooms, roofing, driveways and more. Get up to 3 free, no-obligation quotes within 24 hours and choose the builder that best fits your project and budget.
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What Cardiff Homeowners Say About Our Garage Conversion Specialists
Single garage to extra bedroom on our Cardiff 1970s detached. Existing breeze-block walls properly insulated and dot-and-dabbed. Total £9000 over 6 weeks. Building regs sign-off first time, no remedials.
Compared two FMB garage conversion specialists in Cardiff through BestBuilders. Builder handled all building regs paperwork start to finish. Final spec £11440. Took 7 weeks. Final inspection passed first time. Estate agent valued the conversion at +£28k.
Six months in, the underfloor heating is doing what it should at sensible cost. Builder we found via BestBuilders in Cardiff specced ICF blocks for the new front wall - thermally vastly better than what was there. Total £13980. Already used them again for the kitchen.
Garage Conversion in Cardiff — FAQs
Plan Your garage conversion Project in Cardiff
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Cardiff homeowners make informed decisions about their garage conversion project.
Garage Conversion Cost Guide
Detailed UK price ranges, regional adjustments and worked examples for garage conversion projects.
Read Garage Conversion Cost Guide →All Garage Conversion Specialists
Browse our nationwide network of vetted garage conversion contractors covering all 519 UK towns.
Browse Garage Conversion Specialists →All Cost Guides
Compare prices across extensions, lofts, kitchens, bathrooms, roofing, driveways and solar projects.
View All Cost Guides →Planning your garage conversion project? Read these guides:
Planning Your Garage Conversion in Cardiff
Before you compare quotes, it's worth understanding the full UK price picture for garage conversion and how Cardiff sits within it. The guides below cover average costs, what affects your quote, and how to choose a builder you can trust.
UK Garage Conversion Cost Guide
Full price ranges, worked examples and the factors that move your quote — drawn from real project data across 519 UK towns.
Read the garage conversion cost guide →Garage Conversion Across the UK
Browse garage conversion services nationwide, see what's typical in your region, and request quotes from any UK location.
Visit the UK garage conversion hub →Planning Permission for Garage Conversion in Cardiff
Find out whether your garage conversion needs planning permission in Cardiff, what Permitted Development limits apply, and how rules differ in conservation areas, Article 4 zones, and listed-building settings.
Read the garage conversion planning rules →More homeowner resources: all UK building guides, cost guides, planning permission, comparisons, how-to guides and industry insights.