House Extensions in Enfield
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At Bigness Group, we design and build bespoke house extensions in Enfield, helping homeowners enhance space, light, and value through thoughtful design and expert construction.
From period homes in Palmers Green and Winchmore Hill to modern family houses in Enfield Town and Southgate, we create extensions that blend seamlessly with your home’s character.
Our full design-and-build service covers everything — from planning applications and drawings to structural work and interior finishing — ensuring your project runs smoothly from start to finish.
Design and Build Services
Our Enfield design-and-build team provides a complete, end-to-end solution:
- Architectural design, surveys, and 3D modelling
- Planning and permitted development advice for Enfield Council
- Structural calculations and Building Control liaison
- Full construction management and quality assurance
- Kitchen, flooring, and lighting integration for a complete finish
With one expert team handling every phase, you’ll enjoy a faster process, clear communication, and exceptional results.
Types of Extensions We Build
We construct every major form of home extension across Enfield, including:
• Glass Box Extensions – Contemporary builds with minimalist architecture.
• Modern House Extensions – Transform your home with a sleek, light-filled modern extension.
• Single-Storey Extensions – Open up your home with bright kitchen and living spaces.
• Double-Storey Extensions – Add rooms on both levels for family growth or resale value.
• Side-Return Extensions – Ideal for terraced homes in Palmers Green or Winchmore Hill.
• Rear Extensions – Perfect for modern garden-facing living.
• Wrap-Around Extensions – Combine side and rear layouts for spacious open-plan designs.
• Conservatories & Orangeries – Year-round glazed living areas.
• Loft & Garage Conversions with Extensions – Expand vertically or laterally for additional rooms.
Construction Standards
Every Bigness project in Enfield follows our strict quality and safety process:
- Groundworks & Foundations – Engineered to suit Enfield’s mixed ground conditions.
- Steelwork & Structure – RSJs and beams for stability and open interiors.
- Walls & Roofs – Brick or render finishes, tiled or flat roof options.
- Windows & Glazing – Energy-efficient materials meeting the latest Part L standards.
- Interior Fit-Out – Electricals, plumbing, flooring, and joinery completed to spec.
- Final Sign-Off – Building Control approval and workmanship warranty included.
Local Knowledge
We’re experienced with Enfield Council’s planning process, including conservation areas like Enfield Town and Winchmore Hill.
Our local expertise helps avoid delays, ensuring your extension gains fast approval and aligns perfectly with borough design guidelines.
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: deep knowledge of Enfield’s planning rules and housing styles.
- Full-service delivery: one point of contact from concept to completion.
- Certified professionals: Building Control-compliant and fully insured.
- Transparent costs: detailed quotations with milestone tracking.
- Proven quality: trusted by homeowners across North London.
With Bigness Group, your extension becomes a natural evolution of your home — designed to improve how you live every day.
FAQ
Do I need planning permission for an extension in Enfield?
Many smaller projects qualify under permitted development, but conservation areas and large builds require full planning. We manage all submissions on your behalf.
How long will my extension take to complete?
Most single-storey builds take 8–14 weeks, while double-storey or wrap-around extensions take 12–20 weeks, depending on design complexity.
Do you work on heritage or listed buildings?
Yes — our team has experience designing extensions that complement period and listed properties.
Can you include kitchens or bathrooms as part of the build?
Absolutely — we integrate full interior fit-outs, from cabinetry to lighting.
Our Recent Projects in Enfield
Our recent work includes side-return extensions in Southgate, wrap-around builds in Winchmore Hill, and full double-storey transformations in Enfield Town.
Each project combines smart design, robust construction, and refined detailing — all hallmarks of Bigness Group’s reputation for excellence.
House Extensions in London by Borough
Bigness Group provides high-quality house extensions across all London boroughs, including Enfield and the wider North London region. Our local specialists understand borough-specific planning rules, ensuring your project is designed, approved, and built with confidence.
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