Do I need planning permission to convert my garage into a living space?

In most cases, no. Turning a garage into a habitable room is usually classed as internal work and falls under Permitted Development, so you often do not need planning permission to convert the existing space. You will need permission for a garage conversion if your home is listed, in a conservation area, has an Article 4 Direction, carries a condition requiring the garage to stay as parking, or if you are creating a separate or independent living space. Because planning permission for a garage depends on your specific address, always check with your local planning authority before you plan your garage conversion.