How Much to Convert a Garage? Costs in 2025 Explained
If you’re wondering how much to convert a garage, the average cost in 2025 ranges from £7,500 to £20,000 in the UK, depending on the size, type and level of customization.
For most homeowners, this means you can turn your unused garage into a cozy bedroom, a stylish home office, or even a family living space at a price that adds significant value to your property.
But what factors affect these costs? What’s the cheapest way to transform your garage without sacrificing quality? This guide will cover everything you need to know including detailed price breakdowns hidden costs to watch out for and smart ways to save money. By the end, you’ll be ready to plan your dream garage conversion with confidence.
Key Facts About Garage Conversion Costs
Garage conversions are one of the most cost-effective ways to add extra living space to your home. Here are some quick facts to help you understand how much to convert a garage and why it’s worth considering:
- Affordable Investment: On average, a garage conversion costs much less than building an extension. You can expect to pay between £7,500 and £20,000 depending on the size and type of conversion.
- Boosts Property Value: Transforming your garage into a bedroom, office, or living space can increase your home’s value by up to 20%. It’s a smart way to get more space and a better return on investment.
- Flexible Options: Whether you want to create a home office, a playroom, or even a gym, garage conversions give you the flexibility to design a space that fits your lifestyle perfectly.
- Quick Turnaround: Most garage conversions take around 2-6 weeks to complete, so you won’t have to deal with a long construction process.
Average Garage Conversion Costs in the UK
So, how much to convert a garage in the UK? The average cost typically ranges from £7,500 to £20,000, but it all depends on the specifics of your project. Factors like the size of your garage, the type of conversion, and the finishes you choose can all impact the final price.
Here’s a quick breakdown:
- Single Garage Conversion: Expect to pay between £7,500 and £12,000. This is ideal for turning a small garage into a cozy bedroom or home office.
- Double Garage Conversion: Costs range from £15,000 to £20,000, perfect for creating a spacious living area or even splitting the space into multiple rooms.
- Partial Garage Conversion: If you only need part of your garage converted, it can cost as little as £5,000 to £8,000, depending on the work involved.
While these are average costs, every project is unique. For example, a simple transformation like turning a garage into an office may cost less than converting it into a fully equipped living space with insulation, plumbing, and electrical work.
Garage Conversion Cost Per Square Meter
When planning how much to convert a garage, one of the most common ways to estimate the price is by square meter. In the UK, the average cost of a garage conversion ranges from £300 to £650 per m², depending on the scope of work and materials used.
Here’s what this cost typically covers:
- Basic Structural Changes:
This includes flooring, walls, and ceilings. For example, insulating your garage and installing new drywall are key steps in making the space livable. - Utilities:
Adding electricity, plumbing, or heating will increase costs. For example, converting a garage to an office may only require extra sockets, while transforming it into a bedroom might need more significant electrical and plumbing work. - Finishes and Customization:
The final cost also depends on how you want the space to look. A simple setup for a home gym will cost less than a fully equipped guest suite with stylish flooring and built-in storage.
Cost Examples Based on Garage Size:
- Single Garage (15-20 m²): £4,500 to £13,000
- Double Garage (30-40 m²): £9,000 to £26,000
By calculating your garage conversion cost per square meter, you can easily estimate your overall budget and prioritize what’s most important for your project. Up next, we’ll dive into how costs vary by the type of garage conversion.
Cost of a Garage Conversion by Type
The type of conversion you choose plays a big role in determining how much to convert a garage. Different designs and layouts require varying levels of work, so let’s break it down:
Attached Garage Conversion
If your garage is connected to your house, converting it is usually more straightforward. Costs range from £7,500 to £12,000 depending on whether you need additional insulation, electrical work, or new windows. This is a popular choice for creating a seamless flow between your garage and your home.
Integral Garage Conversion
An integral garage (one built into the structure of your house) typically costs between £8,000 and £15,000. Since it’s already under your main roof, less structural work is required, making it one of the more affordable options.
Detached Garage Conversion
Converting a detached garage can cost anywhere from £10,000 to £20,000. These projects usually involve more work since you may need to add heating, plumbing, or even a new roof to make the space comfortable year-round.
Double Garage Conversion
A double garage offers plenty of space, but it also comes with higher costs. Expect to pay £15,000 to £26,000, depending on whether you’re turning it into one large room or dividing it into multiple functional areas.
Partial Garage Conversion
If you want to keep part of your garage for storage while transforming the rest into a usable space, this can cost as little as £5,000 to £8,000. It’s a great budget-friendly option for homeowners who need a balance of functionality.
Specialized Conversions
- Garage-to-Bedroom Conversion: Perfect for adding an extra bedroom for guests or family, costing £10,000 to £15,000.
- Carport-to-Garage Conversion: Turning an open carport into a secure garage can range from £5,000 to £10,000, depending on the level of enclosure and finishing.
- Garage-to-Office Conversion: Creating a quiet workspace typically costs around £8,000 to £12,000, with custom features like built-in desks or extra lighting adding to the price.
Luxury Home Builder: Crafting Custom Homes with Sophistication and Style

How Much Does Labour Cost to Turn a Garage into a Room?
Labour costs are a significant part of how much to convert a garage, and they can vary based on the type of work required and your location. On average, labour costs range from £1,000 to £5,000, depending on the complexity of the project and the tradespeople involved.
Here’s a breakdown of common labour costs:
General Builders
General builders typically handle structural work like walls, floors, and ceilings. Their rates can range from £150 to £250 per day depending on their experience and your region.
Electricians
Adding or upgrading electrical wiring for lighting, sockets, and appliances will cost between £300 and £1,000, depending on the number of outlets and complexity of the setup.
Plumbers
If your project involves installing a bathroom or running water to the converted space, a plumber might charge £350 to £1,500 for their work, depending on the extent of the plumbing required.
Carpenters and Joiners
For custom features like built-in storage, flooring, or doors, carpenters charge around £200 to £300 per day.
Painters and Decorators
Finishing touches, like painting and decorating, will cost between £500 and £1,500, depending on the size and detail of the work.
What Affects Labour Costs?
Several factors can influence how much you’ll pay for labour, such as:
- Location: Labour rates in London and the South East are typically higher than in other parts of the UK.
- Project Complexity: The more custom work or specialist skills needed, the higher the cost.
- Tradespeople Availability: Hiring skilled professionals during peak seasons may cost more due to high demand.
Hidden Costs and Common Surprises
While it’s easy to budget for the obvious expenses, like materials and labour, many homeowners are caught off guard by hidden costs that come with garage conversions. To avoid any surprises here’s a breakdown of additional costs you should keep in mind:
Planning Permission and Building Regulations
- In most cases, you won’t need full planning permission to convert your garage, but it’s crucial to check with your local council. Fees for approvals can range from £200 to £500.
- Building regulations approval is typically required to ensure your garage meets safety standards. Inspections and compliance certificates can cost between £300 and £800.
Insulation and Heating
- Converting a garage into a comfortable living space means adding proper insulation and heating. This can cost between £1,000 and £3,000, depending on the size of the space and the materials used.
Flooring Adjustments
- Most garages have uneven concrete floors, so leveling or adding flooring materials like laminate or carpet can add another £500 to £2,000 to your budget.
Windows and Ventilation
- If your garage doesn’t already have windows, installing them for natural light and ventilation is essential. Costs range from £1,000 to £3,000 per window, depending on the size and style.
Plumbing and Drainage
- If you’re adding a bathroom or kitchen area, plumbing and drainage work can cost anywhere from £2,000 to £5,000, depending on the complexity.
Electrical Upgrades
- Older garages might not have adequate wiring for modern appliances or lighting. Rewiring or upgrading the electrical panel can add another £1,000 to £3,000 to your costs.
Unexpected Repairs
- Once the work begins, you might uncover issues like dampness, structural weaknesses, or roof repairs. These can add £500 to £2,000 or more to your budget, depending on the severity.
How to Prepare for Hidden Costs:
- Set aside a 10-15% contingency fund to cover unexpected expenses.
- Get multiple quotes from contractors to avoid surprises.
Ask for a detailed cost breakdown in advance so you can identify potential extras early.
How to Upgrade Your Balcony Space with a Retractable Roof System

Money Saving Tips for Garage Conversions
Converting a garage doesn’t have to drain your savings. With a little planning and some clever strategies, you can keep costs under control without sacrificing quality. Here are some practical tips to save money on how much to convert a garage:
Stick to the Basics
- Focus on creating a functional space rather than adding expensive features. For example, instead of luxury flooring, opt for affordable but durable materials like laminate or vinyl.
- Skip non-essential extras like custom cabinetry if you’re on a tight budget.
DIY What You Can
- While certain tasks like electrical and plumbing require professionals, you can save by doing some of the simpler tasks yourself, like painting, decorating, or even installing furniture.
- YouTube and DIY tutorials can help guide you through small jobs safely.
Reuse and Recycle Materials
- Look for reclaimed or second-hand materials for flooring, windows, or doors. Websites like Gumtree or Facebook Marketplace are great places to find affordable options.
- If your garage already has sturdy flooring or functional wiring, reuse what’s there instead of starting from scratch.
Opt for a Partial Conversion
- If you don’t need the entire garage space, consider a partial conversion. This can significantly lower costs while still giving you extra usable space.
Get Multiple Quotes
- Always get at least three quotes from contractors. Prices can vary widely, and comparing them ensures you’re getting the best deal for your money.
- Don’t just choose the cheapest quote—make sure the contractor has good reviews and experience with garage conversions.
Plan for Efficiency
-
- Keeping the existing garage layout can save you money on structural changes. For example, leaving the garage door in place but adding insulation and interior paneling can cut costs.
Conclusion
Converting a garage is one of the smartest ways to maximize your home’s potential, whether you need more living space, an extra bedroom or a functional office.
While the cost of a garage conversion in 2025 typically ranges from £7,500 to £20,000, careful planning, budgeting, and prioritizing your needs can help you achieve your vision without breaking the bank.
By understanding the factors that influence costs—such as the type of conversion, labour, and hidden expenses—you’re now equipped to make an informed decision.
Remember a well executed garage conversion doesn’t just provide extra space; it’s an investment that can boost your home’s value and enhance your lifestyle.
So, whether you’re dreaming of transforming your garage into a cozy bedroom or finally creating that home office, take the next step with confidence. Start by getting quotes exploring your options, and making your unused garage work for you. The possibilities are endless!
FAQs
How much to convert a garage in 2025?
On average, converting a garage costs between £7,500 and £20,000 in the UK. The exact price depends on the size of the garage, the type of conversion and the level of customization.
Do I need planning permission for a garage conversion?
In most cases, you don’t need planning permission especially if you’re not altering the exterior significantly. However, you’ll need to comply with building regulations which ensure the space meets safety and quality standards. Always check with your local council for specific requirements.
Can I convert part of my garage and keep the rest for storage?
Yes! A partial garage conversion is a cost-effective way to gain extra living space while retaining some storage. It typically costs between £5,000 and £8,000 depending on the size and layout.
What’s the most affordable way to convert a garage?
To save money, keep the layout simple, reuse existing materials and focus on functionality over luxury. For example, converting a garage to an office can be done relatively cheaply if no major plumbing or structural changes are required.