House Extensions in Hackney
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At Bigness Group, we specialise in designing and building bespoke house extensions in Hackney — where period charm meets modern living.
From Victorian terraces in Stoke Newington and Hackney Central to converted lofts in Clapton and modern homes in Dalston, we craft extensions that expand space, maximise light, and preserve the character of your property.
We handle the full process — from design and planning to construction and finish — ensuring a seamless experience and outstanding results, every time.
Design and Build Services
Our Hackney design-and-build team provides complete end-to-end project management:
Full measured survey, design, and 3D visualisation
Planning and permitted development advice for Hackney Council
Structural engineering and Building Control coordination
Kitchen, dining, and living area redesigns
Dedicated project management and progress updates
With one integrated team overseeing your project, you get total accountability, clear communication, and the quality that defines Bigness.
Types of Extensions We Build
We construct every major form of home extension across Hackney, including:
• Glass Box Extensions – Contemporary builds with minimalist architecture.
• Modern House Extensions – Sleek contemporary designs with minimal framing.
• Single-Storey Extensions – Ideal for narrow Victorian and Edwardian homes in Hackney Central.
• Double-Storey Extensions – Add valuable space on both floors for growing families.
• Side-Return Extensions – Perfect for Victorian and Edwardian terraces in Blackheath.
• Rear Extensions – Create light-filled dining spaces opening onto gardens.
• Wrap-Around Extensions – Combine side and rear layouts for seamless flow.
• Conservatories & Orangeries – Elegant glazed rooms for all seasons.
• Loft & Garage Conversions with Extensions – Transform underused space into stylish living areas.
Construction Standards
Every Bigness project in Hackney is built with precision and attention to detail:
- Groundworks & Foundations – Engineered for urban sites and terraced layouts.
- Steelwork & Framing – RSJs and beams installed for open-plan layouts.
- Walls & Roofing – Brick match or render finish with warm-roof insulation.
- Windows & Glazing – Energy-efficient systems meeting latest Part L standards.
- Interiors & Finishes – Plumbing, electrical, flooring, and bespoke joinery.
- Building Control Sign-Off – Certification and long-term workmanship warranty.
Local Knowledge
We have extensive experience with Hackney Council’s planning and conservation regulations, including works in De Beauvoir, Clapton Square, and Victoria Park.
Our designs respect local heritage while incorporating modern engineering and sustainable materials — ensuring smooth approvals and long-lasting results.
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 understanding of Hackney’s housing stock and council processes.
Integrated service: one team handling design, permissions, and build.
Skilled professionals: accredited trades and structural engineers.
Transparent pricing: detailed quotations and stage payments.
Proven results: trusted by homeowners across East London.
Bigness Group brings craftsmanship, reliability, and vision to every extension — built for modern life, inspired by heritage.
FAQ
Do I need planning permission for an extension in Hackney?
Many smaller extensions fall under permitted development, but conservation areas and listed properties need full approval. We handle all submissions.
How long does construction take?
Typically 8–14 weeks for single-storey and 12–20 weeks for larger or two-storey builds.
Can you work on listed or conservation homes?
Yes — we regularly design extensions for heritage properties within Hackney’s protected zones.
Do you manage interiors too?
Absolutely. We deliver full fit-outs including kitchens, flooring, and lighting.
Our Recent Projects in Hackney
Recent projects include a glass-roofed side return in Stoke Newington, a double-storey rear extension in Hackney Central, and a minimalist wrap-around in London Fields. Each showcases our balance of architectural sensitivity and modern precision, turning older properties into contemporary, functional homes.
House Extensions in London by Borough
Bigness Group delivers professional house extension services across all London boroughs, including Hackney and the wider East London area. Our local expertise ensures smooth planning, high-quality construction, and designs that respect the borough’s distinctive architecture.
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.
