How Much Does a Garage Conversion Cost in Devon? 2025 Price Guide and Key Factors
- James Carter
- Oct 30
- 3 min read
Understanding the True Cost of a Garage Conversion
If you’re thinking about converting your garage into extra living space, one of the first questions that comes to mind is: how much will it cost?
The short answer is that garage conversions in Devon typically cost between £12,000 and £25,000, depending on the size, specification, and level of finish. But that’s just the starting point. Let’s explore the factors that influence price — and how to make sure you get genuine value for money.
Average Garage Conversion Costs in Devon (2025 Guide)
Conversion Type | Typical Cost Range | Description |
Single Garage Conversion | £12,000 – £18,000 | Converting a standard single garage into a bedroom, office, or snug |
Double Garage Conversion | £20,000 – £28,000 | More extensive works including insulation, partitioning, and heating |
Integral Garage Conversion | £10,000 – £16,000 | Usually lower cost as it’s already part of the main house structure |
Detached Garage Conversion | £18,000 – £30,000+ | Involves extra work such as connecting utilities and insulation upgrades |
All figures are averages based on 2025 Devon rates for full turnkey conversions.
Key Factors That Influence Garage Conversion Cost
1. Type and Condition of the Existing Garage
Older or detached garages may need more structural work — such as new foundations, damp proofing, or roof repairs. An integral garage (attached to your home) is generally quicker and cheaper to convert.
2. Intended Use of the New Space
A simple living area or playroom is relatively affordable. However, if you’re planning a bathroom, kitchen, or self-contained annexe, plumbing, drainage, and electrical upgrades can add £5,000–£10,000 to the total cost.
3. Quality of Finishes
Flooring, glazing, heating, and lighting choices all make a difference. A high-end finish can elevate your space but also increase spend.At Devon Garage Conversions, we help homeowners balance aesthetics and cost with smart material choices.
4. Building Regulations and Planning
While most garage conversions in Devon fall under permitted development, you’ll still need to comply with Building Regulations for insulation, fire safety, and ventilation. Fees for building control inspections typically range from £400 to £800, depending on your local authority.
5. Utility Connections
If the garage isn’t currently serviced by your home’s heating, plumbing, or electrics, adding these can be one of the biggest cost variables.
How to Keep Garage Conversion Costs Under Control
Here are some practical tips to manage your budget effectively:
Use an all-in-one specialist — working with one contractor for design, build, and compliance avoids duplication of costs.
Get a fixed-price quote — at Devon Garage Conversions, we provide clear, itemised pricing upfront with no hidden extras.
Plan your layout carefully — early design planning can avoid expensive mid-project changes.
Invest where it counts — insulation, heating, and glazing have long-term payback through comfort and energy efficiency.
Check for grants or incentives — some Devon councils offer energy efficiency or accessibility grants.
The Value Added by a Garage Conversion
A professional garage conversion doesn’t just add space — it adds value. According to recent UK property data, a well-designed conversion can increase your home’s market value by 10–20%.
In Devon, where space and flexibility are in high demand, conversions that create home offices, annexes, or guest suites are particularly sought after.
Why Choose Devon Garage Conversions
We specialise exclusively in garage conversions across Exeter, Tiverton, and Cullompton, delivering fully managed, building regulation–compliant projects.
Our service includes:
Free site survey and fixed quotation
Full building control liaison
All design, structural, and construction work
Quality assurance and warranty coverage
We’ve built our reputation on expert craftsmanship, transparent pricing, and local knowledge.
Thinking About Converting Your Garage?
If you’re planning a garage conversion in Devon, start with a transparent quote you can trust.
Contact Devon Garage Conversions today for a free consultation and cost breakdown tailored to your property.
👉 Request Your Quote — serving Exeter, Tiverton, and Cullompton with expert, fixed-price conversions.
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