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No matter your questions, we’re happy to help. With our experience, we’ll make sure the process is smooth and straightforward.
Expand your living space with quality house extensions in Surrey.
Bagnall Builders delivers stunning, stress-free results every time.
Most single-storey extensions take 8–12 weeks, depending on size and complexity.
We’ll give you a clear timeline upfront.
Some extensions fall under permitted development, while others require approval. We help you through the process.
In many cases, garage conversions fall under permitted development, meaning no planning permission is needed.
However, this depends on factors such as the property type, conservation area rules, and local council policies.
We will confirm your specific requirements and help with any planning applications if needed.
Absolutely. We specialise in seamless integration — your extension will feel like part of the original home.
Maximise Your Home’s Potential with Bagnall Builders
If you’re looking for trusted house extension contractors in Surrey and South West London, Bagnall Builders is your local expert.
Established in 1976, we are a family-run building company offering professional and cost-effective house extensions that enhance your lifestyle and increase property value.
Whether you need more space for a growing family, a stylish open-plan kitchen, or a light-filled rear extension — we’ve got the experience and expertise to bring your vision to life.
Extending your home is one of the smartest ways to improve your property without the stress and cost of moving.
A well-designed extension adds functional space and real long-term value. At Bagnall Builders, we specialise in high-quality:
Rear Extensions
Side & Wraparound Extensions
Double-storey Extensions
Kitchen & Dining Extensions
Loft Conversions and Garage Conversions
Our skilled team works closely with you, architects, and planning departments to ensure your extension is built to the highest standards — on time, and on budget.
For over 45 years, we’ve been the go-to builders in Surrey and South London. Clients choose us because we offer:
We take pride in every job — big or small — and always aim to exceed expectations.
We offer a turnkey solution for your extension project:
Site visit and detailed consultation
Architectural plans and structural engineering (if required)
Planning application guidance
Demolition and groundwork
Brickwork, structural repairs, and steelwork
Plumbing, electrical, plastering, and decorating
Roof installation and finishes
Windows, doors, and flooring
Final handover and optional ongoing maintenance
Rear Extensions
Perfect for creating an open-plan kitchen-diner or a larger family room.
These extensions add space and flow to your home.
Side Return Extensions
Ideal for terraced or semi-detached homes, a side extension uses wasted alley space to widen your living areas.
Wraparound Extensions
Combine a rear and side extension for maximum space — ideal for open-plan layouts and extra bedrooms.
Double-Storey Extensions
Need serious space?
A two-storey extension adds rooms on both levels, ideal for families needing extra bedrooms or bathrooms.
Garage Conversions
Convert your unused garage into a playroom, office, or guest suite without changing your home’s footprint.
If you’re planning a House Extension in Surrey, speak to the trusted team at Bagnall Builders. We offer free site visits, honest quotes, and expert advice tailored to your home and budget.
Call George on 01372 790095
Email: info@bagnallbuilders.co.uk
Based in Epsom | Covering Surrey, Morden, Wimbledon, and surrounding areas
Bagnall Builders: Your trusted partner for reliable building services and expert craftsmanship across Surrey and Epsom.
Bagnall Builders Epsom
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