Thinking about converting your garage but not sure what it will cost? You are not alone. A garage conversion is one of the most popular ways to add usable living space to a home in Staffordshire, and the first question almost every homeowner asks is a simple one: how much will it cost?

At DJF Building, we have converted garages into home offices, gyms, playrooms and extra bedrooms across Burntwood, Cannock, Lichfield, Walsall and the wider Staffordshire area. In this guide we break down realistic 2026 prices, explain what affects the final figure, and help you budget with confidence.

How much does a garage conversion cost in 2026?

As a general guide, a garage conversion in the UK typically costs between £10,000 and £32,000, depending on the size of the garage, the type of room you want, and the amount of structural, electrical and plumbing work involved.

Here is a rough breakdown to help you plan:

  • Single garage conversion: around £12,000 to £24,000 for a standard 15–18 m² space, with many projects averaging close to £14,500.
  • Double garage conversion: typically £15,000 to £35,000+, reflecting the larger floor area and additional finishing work.
  • Cost per square metre: usually in the region of £1,000 to £1,500 per m² for a standard specification.

These are guide figures only. The most accurate way to understand your costs is a free site visit and quote, where we can assess the garage and talk through exactly what you want to achieve.

What affects the cost of a garage conversion?

No two garages are the same, and several factors influence the final price:

1. Integral vs detached garage

An integral garage (attached to the house) is usually cheaper to convert because electrics, heating and water are close by. A detached garage often costs more, as services have to be run further from the main property.

2. How you plan to use the space

A simple home office or playroom is generally more affordable than a room that needs plumbing, such as a bathroom, utility room or kitchenette. The more services involved, the higher the cost.

3. Insulation, flooring and finishes

A garage was never designed to be a warm, comfortable living space, so proper insulation, damp-proofing, flooring and plastering are essential. The quality of finishes you choose will also affect the budget.

4. Structural changes

Replacing the garage door with a wall and window, raising the floor level, or altering the roofline all add to the cost but are often key to making the room feel like a natural part of the home.

5. Building regulations

Garage conversions must comply with building regulations covering insulation, ventilation, fire safety and structural integrity. This is built into a professional quote and is not a corner worth cutting.

Do garage conversions need planning permission?

In many cases, a garage conversion can be carried out under permitted development rights, meaning full planning permission is not required. However, this depends on your property type, whether you live in a conservation area, and whether the garage is integral or detached.

Building regulations approval is almost always needed, even when planning permission is not. We guide every customer through this during the consultation, so you are never left guessing.

Is a garage conversion worth it?

For most homeowners, yes. A garage conversion is one of the most cost-effective ways to gain extra living space without losing garden, and it is usually faster to complete than a traditional extension. A well-finished conversion can also add value to your home and make it more appealing to future buyers, particularly when the garage is currently used for storage rather than parking.

If you need more room for a growing family, a dedicated workspace, or a home gym, converting the garage often makes far more financial sense than moving house.

Garage conversion costs: frequently asked questions

How long does a garage conversion take?

Most single garage conversions are completed within a few weeks, depending on the size and complexity of the work.

Will a garage conversion add value to my home?

A well-finished conversion can increase property value and broaden the appeal of your home to future buyers.

Can you convert a detached garage?

Yes. Detached garages can be converted into offices, gyms, studios or annexe spaces, though running services to them can add to the cost.

Do I need to insulate a converted garage?

Yes. Proper insulation is essential to keep the room warm, comfortable and energy efficient throughout the year, and it is required under building regulations.

Get a garage conversion quote in Staffordshire

Every home is different, so the best way to find out exactly what your project will cost is to speak to a local specialist. As a family-run, Checkatrade-rated builder based in Burntwood, DJF Building provides honest, transparent quotes with no hidden costs.

Learn more about our garage conversion services, or get in touch today to arrange a free consultation and discuss your ideas with our team.