Extensions & Structural Alterations in London
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Looking to expand your property and improve its layout? At Bigness Group, we deliver professional extensions and structural alterations in London, tailored to your needs and budget. Whether you want a kitchen extension, an extra bedroom, or structural modifications to open up space, our expert team ensures safe, compliant, and stylish results.
What We Offer
House Extensions
From rear and side extensions to wrap-around projects, we create additional space that blends seamlessly with your home.
Structural Alterations
We carry out wall removals, beam installations, and other structural works to transform layouts and improve flow.
Bespoke Design
Our architects and engineers design solutions that maximise light, space, and value.
Cost of Extensions & Structural Alterations in London
The cost depends on the size and complexity of the work:
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Small extensions – from £25,000
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Structural alterations (e.g., wall removal) – from £5,000
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Custom projects – individually priced after survey
👉 We provide transparent pricing and a free, no-obligation quote.
Why Choose Bigness Group?
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✅ Experienced team of builders and engineers
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✅ Compliance with all UK building regulations
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✅ High-quality workmanship with minimal disruption
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✅ Transparent pricing and clear timelines
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✅ Serving all London boroughs
Frequently Asked Questions
A: Many extensions fall under permitted development, but we’ll guide you through the process.
Q: Can you handle structural calculations?
A: Yes, our engineers prepare all necessary structural reports and calculations.
Q: How long will the work take?
A: Most extensions take 8–12 weeks, depending on complexity.
Our Latest Extensions & Structural Alterations Projects in London
Take a look at some of our recent extensions and structural alteration projects across London. From modern kitchen and rear extensions to major structural changes that open up living spaces, these projects showcase our ability to combine engineering expertise with creative design. Every project we deliver is safe, compliant, and built to last — adding both space and long-term value to London homes.
Extensions & Structural Alterations Company in London by Borough
At Bigness, we specialise in delivering high-quality extensions and structural alterations across London. Whether you’re planning to extend your kitchen, add an extra bedroom, or remove walls to create open-plan living, our team provides safe, compliant, and cost-effective solutions. Explore the boroughs below to find expert extension and structural alteration services near you.
Barking and Dagenham / Barnet / Bexley / Brent / Bromley / Camden / Croydon / Ealing / Enfield / Greenwich / Hackney / Hammersmith and Fulham / Haringey / Harrow / Havering / Hillingdon / Hounslow / Islington / Kensington and Chelsea / Kingston upon Thames / Lambeth / Lewisham / Merton / Newham / Redbridge / Richmond upon Thames / Southwark / Sutton / Tower Hamlets / Waltham Forest / Wandsworth / Westminster