House Extensions in Ealing
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At Bigness Group, we design and build elegant, high-performance house extensions in Ealing, helping homeowners create bright, functional spaces that add long-term value.
From period terraces in Hanwell and Ealing Broadway to detached homes in Acton and Northfields, we deliver bespoke extensions that fit perfectly with your home’s character and lifestyle.
We handle everything — concept, planning, structure, and construction — ensuring a smooth, efficient project from first sketch to final sign-off.
Design and Build Services
Our Ealing design-and-build team offers a complete service, combining creativity, technical skill, and local planning expertise:
Full measured survey and architectural drawings
Planning applications and permitted development guidance
Structural engineering and Building Control compliance
Interior layouts, kitchens, and lighting design
Dedicated project manager overseeing each stage
One contract, one team, one seamless process — that’s the Bigness promise.
Types of Extensions We Build
We construct every major form of home extension across Ealing, including:
• Glass Box Extensions – Contemporary designs with clean lines and natural light.
• Modern House Extensions – Transform your home with a sleek, light-filled modern extension.
• Single-Storey Extensions – Bright kitchen and dining areas with garden access.
• Double-Storey Extensions – Add bedrooms, bathrooms, and living space.
• Side-Return Extensions – Perfect for Edwardian and Victorian homes in Northfields.
• Rear Extensions – Expand towards the garden for open-plan living.
• Wrap-Around Extensions – Combine side and rear expansions for maximum space and light.
• Conservatories & Orangeries – Year-round glazed living areas.
• Loft & Garage Conversions with Extensions – Integrated vertical or lateral expansions for full property transformation.
Construction Standards
Every Bigness project in Ealing follows a strict, proven build process:
- Groundworks & Foundations – Engineered to local conditions and soil type.
- Steelwork & Structure – RSJs and frames installed for strength and open layouts.
- Walls & Roofing – Brick match, render, or cladding with warm-roof insulation.
- Windows & Glazing – High-performance, energy-efficient systems.
- Interiors & Finishes – Plumbing, electrics, plastering, and joinery to spec.
- Final Inspection – Building Control sign-off and structural warranty.
Local Knowledge
We know Ealing Council’s planning regulations inside out — from conservation zones in Bedford Park to larger suburban plots in Greenford.
Our experience with local design codes and heritage rules ensures smooth approvals and harmonious results that complement the area’s distinct architecture.
Costs and Financing
Every extension is unique, but here’s a general guide:
| Type | Typical Cost Range (2025) |
|---|---|
| Single-Storey Extension | £45,000 – £85,000 |
| Double-Storey Extension | £75,000 – £130,000 |
| Wrap-Around Extension | £90,000 – £160,000 |
| Side-Return Extension | £40,000 – £75,000 |
💡 Factors include size, materials, access, and specification level.
We provide transparent quotes with detailed breakdowns and stage payments.
Financing options may be available through our partner lenders for eligible clients — ask our team for guidance on home improvement financing.
The Process
1. Consultation & Site Visit – We meet you on-site to discuss ideas, goals, and feasibility.
2. Design & Planning – We prepare drawings, handle permissions, and finalise the budget.
3. Construction Phase – Our project manager oversees all work, ensuring safety and communication at every step.
4. Completion & Aftercare – Once finished, we conduct final inspections and provide warranty documentation.
We also offer optional maintenance plans to keep your new space performing at its best.
Why Choose Bigness Group
- Local expertise: in-depth knowledge of Ealing’s property styles and planning process.
- Full service: design, planning, structure, and interiors under one contract.
- Certified quality: compliant with UK Building Regulations and energy standards.
- Transparent pricing: itemised quotes and milestone payments.
- Proven reliability: trusted by homeowners across West London.
Bigness Group delivers more than extensions — we build lasting improvements to how you live and experience your home.
AQ
Do I need planning permission for an extension in Ealing?
Many single-storey projects fall under permitted development, but double-storey and heritage properties require planning approval. We handle the full process.
How long does construction take?
Average build time is 8–14 weeks for single-storey and 12–20 weeks for double-storey projects.
Can you match my existing materials?
Yes — we source brick, render, and tile to blend your new build seamlessly.
Do you work on listed or conservation homes?
Yes. Our architects are experienced with heritage compliance in Bedford Park and Ealing Broadway.
Our Recent Projects in Ealing
Recent Ealing builds include a modern kitchen extension in Acton, a wrap-around design in Hanwell, and a two-storey family addition in Ealing Common. Each reflects our trademark attention to detail, precision engineering, and timeless design — enhancing both space and lifestyle.
House Extensions in London by Borough
Bigness Group delivers professional house extensions across all London boroughs, including Ealing and West London’s surrounding areas. Our local expertise ensures each design aligns with council standards, neighbourhood style, and your property’s unique character.
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
Practical thinking for better-managed buildings.
Guidance, technical insight and practical perspectives on compliance, maintenance, building performance and long-term improvement.
