Garage Conversion Cost London
Thinking of converting your garage into a functional living space? A garage conversion is one of the smartest ways to unlock extra room in your home — whether you’re dreaming of a home office, guest bedroom, or playroom. But what does it cost?
At Planning Design London, we design thoughtful, compliant garage conversions that add value, comfort, and practicality to your home. Here’s what to expect when budgeting for your project.
Typical Garage Conversion Costs in London
Garage conversion prices can vary widely depending on several factors, including the size of the garage, its existing condition, and the complexity of the design. As a general guide, a basic single garage conversion typically starts from £10,000 to £15,000. A mid-range conversion, which includes insulation, plumbing, and electrics, usually falls between £15,000 and £25,000. For a high-spec conversion that incorporates features like an en-suite bathroom or a small kitchen, you can expect to pay upwards of £25,000.
Additional costs may arise if your garage is detached, has structural issues, or requires significant upgrades. For instance, underpinning the foundations, raising the floor level, or addressing damp problems can all increase the overall budget. It’s important to have a professional assess your garage early in the planning process to get a realistic estimate tailored to your specific needs.
What Affects Garage Conversion Costs?
- Several key factors impact the total price:
- Condition of the existing structure
- Type of conversion (office, bedroom, annex, etc.)
- Insulation, heating, plumbing, and electrics
- Internal finishes and fittings
- Planning permission (not always required)
- Building regulations compliance
- Any structural alterations or new windows/doors
We work with clients to develop clear, realistic budgets and provide detailed design packs ready for construction.
Garage Conversion Design Services
Our team provides end-to-end support, including measured surveys and concept plans, planning drawings with permitted development advice, building regulations drawings and technical design, and coordination with structural engineers and builders. We’ve helped clients across South London transform unused garages into stunning, energy-efficient living spaces — and we’d love to help you do the same.
Ready to Turn Your Garage into Living Space?
Whether you want to boost your home’s value or make space for your growing family, we’ll design your ideal garage conversion — with full transparency on costs and planning.
Contact Planning Design London today for a free quote and personalised advice.
