It probably won’t surprise you to learn that the cost to convert a garage into a room is often significantly less than the cost of an attic conversion.

Having said that, the project is by no means a cheap one.

Garage conversions cost anywhere from £8,000 to £30,000. The biggest factors that determine the cost are the square footage of the garage and the reconfiguration necessary to convert the garage into a usable room.

To convert a standard garage that you would find built into a house, a good baseline figure is £8,000 to £12,000. To convert a double garage or a large outbuilding garage, you can reasonably double that price.

For those prices, here’s a list of the things that happen during the average conversion:

  • The front wall is reconfigured to replace the garage door with a solid wall, window and an external door if required
  • The internal walls are insulated
  • The internal walls are then plastered
  • The roof is insulated
  • The roof is then plastered
  • The floor level is raised to match the house
  • New electrics are installed to suit the layout
  • Central heating is integrated with a new radiator

This covers your standard garage conversion. The steps outlined above will transform most garages into a room that can be used for almost anything.

However, you may want or need some extras, such as:

  • Underfloor heating
  • Flooring – wooden floors, tiling, carpet, etc.
  • Plumbing
  • A new solid or GRP roof (outbuilding garages)
  • Skylights (outbuilding garages)

If you add extras like underfloor heating and plumbing, you can reasonably expect the cost to convert your garage into a room to jump by a few thousand.

Also, extending the garage will cost more and will involve garage conversion planning permission.

Is it worth it?

Making good use of the square footage of your home is important. If your garage is currently unused and you need more living space, a conversion will be worth it to give you a better standard of living and more room for the family.