Thinking about expanding your home but reluctant to encroach on your garden or other outdoor space? Have you considered a garage conversion? Converting your garage could be the ideal solution; it makes efficient use of your existing space and is more budget-friendly when compared to other types of home improvements. However, lots of homeowners still ask the question – how much does a garage conversion cost in the UK? Below, we’ve written a short post about the average garage conversion costs you can expect – keep reading to learn more. 


modern home with rear extension

The Average Cost of a Garage Conversion

When it comes to the financial aspect of converting a garage, the costs can vary significantly depending on a range of factors. However, to give you a general sense, we’ve listed a few of the costs below;

  • Single Garage (15m2): The cost usually ranges from £6,000 to £15,000.
  • Double Garage (30m2): You can expect to pay between £12,000 and £30,000.

It’s crucial to remember that these figures are approximate and can fluctuate based on your specific needs, the existing layout of the garage, and other variables such as location and material costs.

Is a Garage Conversion Project Worth it?

Before you commit any resources to a garage conversion, it’s essential to consider both the advantages and disadvantages of such a project and some of these we have listed below.




1. Cost-Effectiveness; 

Converting a garage is generally less expensive than constructing a new extension from scratch. This is primarily because you’re repurposing an existing structure, which often requires fewer materials and less labour.

2. Space Efficiency; 

One of the most appealing aspects of a garage conversion is that it doesn’t consume any additional outdoor space. This is particularly beneficial if you have a smaller property or value your garden area.

3. Simplified Planning; 

Garage conversions often fall under ‘permitted development rights,’ making it easier to proceed without the need for stringent planning permissions.




1. Loss of Parking Space;

The most obvious downside is that you’ll lose your garage, which could be problematic if parking is scarce in your local area.

2. Building Regulations;

Garage conversions must comply with building regulations, which can add to the cost of the project. You will need to hire a qualified builder to carry out the work to ensure that it meets all of the necessary requirements.

3. Disruption;

Garage conversions can be disruptive, as they involve building work and may also require the installation of new utilities. If you are living in the home during the conversion, you may need to find somewhere else to stay for some of the time.

Deciding the Purpose of the Converted Space

The intended use of the converted space can significantly impact the overall cost. Whether you’re envisioning a new kitchen, bathroom, bedroom, home office, gym, or even a home cinema, each option comes with its own set of financial and logistical considerations. For instance, converting the garage into a bathroom would require plumbing installations, which could escalate costs.

Detailed Cost Breakdown

Whether it’s a single garage conversion or a larger-scale project, there are many different types of costs involved when you convert your existing garage. For example;

1. Removing Garage Doors: 

Expect to pay between £1,300 and £2,000 for this. The cost includes labour and materials needed to replace the garage door with a standard wall.

2. New Doors and Windows: 

The cost can range from £600 to £1,500, depending on whether you opt for standard or custom designs.

3. Flooring: 

Most garages have concrete floors that are not suitable for living spaces. You might need to spend £1,000 to £1,300 to make the floor habitable.

4. Insulation: 

Proper insulation is crucial for making the space comfortable and energy-efficient. This could cost you between £750 and £1,000.

5. Wall Removal: 

If your project involves removing walls, especially load-bearing ones, the cost can vary from £300 to £1,200.

6. Utilities: 

The utility costs can range from £1,000 to £4,000, depending on whether you need to install new electrical outlets, plumbing, or gas lines.

7. Administrative Costs: 

These are usually around £400 to £600 and include planning permissions or any council approvals that may be required.

8. Architect Fees:

 For more complex projects, hiring an architect could cost between £700 and £2,500.

9. Building Regulations Application:

 Expect to pay £500 to £1,000 for this, which includes application and inspection fees.

Different Types of Garage Conversion at Steve Rolt Home Improvements

Here at Steve Rolt Home Improvements, we specialise in garage conversions, offering a cost-effective way to add valuable living space to your home. Our service can transform garages into a variety of spaces, from home offices to playrooms, potentially increasing your home’s value by up to 10%. 

We provide an all-in-one service, ensuring that all work meets building regulations through our team of qualified NICEIC electricians and Gas Safe certified heating engineers. With a proven track record in Hertfordshire, Essex, and Cambridgeshire, we are a number one choice. If you have any questions, contact us today on 07739 723103 or email us at