Skip to main content
All Well

Garage Conversion Cost Calculator

Estimate the cost of converting your garage into living space. Factor in garage size, intended use, plumbing requirements, and your borough for a personalised cost breakdown.

Frequently Asked Questions

Do I need planning permission for a garage conversion?

Most garage conversions fall under permitted development and do not require planning permission, as they do not increase the overall footprint of the building. However, you will need Building Regulations approval. Properties in conservation areas or with specific planning conditions may need to apply.

Does a garage conversion add value to my home?

A well-executed garage conversion can add 10-20% to your property value. Converting a garage into a bedroom or self-contained annexe typically offers the best return on investment, often adding more value than the conversion costs.

How long does a garage conversion take?

A standard garage conversion typically takes 3-6 weeks. More complex projects such as annexes with plumbing for kitchenettes or en-suites may take 6-8 weeks. The timeline depends on structural work needed and the intended use.

Related free tools

Kitchen Cost Calculator

Get an instant estimate for your kitchen extension project in South East London. Factor in extension type, size, finish level, and your borough for a personalised cost breakdown.

Bathroom Cost Calculator

Get an instant estimate for your bathroom renovation in London. Choose your bathroom type, size, fixture quality, and scope for a detailed cost breakdown.

Loft Cost Calculator

Estimate the cost of your loft conversion based on type (dormer, mansard, hip-to-gable), intended use, and location in South East London.

Painting Cost Calculator

Get an instant estimate for painting and decorating your home in London. Factor in room count, wall condition, paint quality, and your borough for a personalised cost breakdown.

See all free tools →