House Extensions in Barking and Dagenham
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At Bigness Group, we design and build house extensions in Barking and Dagenham that expand living space, increase property value, and reflect your home’s character.
Whether you’re planning a single-storey rear extension, a wrap-around design, or a full double-storey upgrade, our team delivers quality craftsmanship with minimal disruption and maximum efficiency.
We manage the full process — from planning applications and design to structural works and finishing — ensuring your extension meets both your vision and local building regulations.
Design and Build Services
Our local Barking and Dagenham team provides complete design-and-build solutions under one roof:
- Architectural drawings and 3D visualisations
- Planning and permitted development advice
- Structural calculations and Building Control coordination
- Kitchen, dining, and living space redesigns
- Dedicated project management from start to finish
This integrated approach keeps your project on time, within budget, and built to last.
Types of Extensions We Build
We construct all major types of home extensions in Barking and Dagenham, including:
• Glass Box Extensions – Striking glass box extensions that redefine modern living.
• Modern House Extensions – Transform your home with a sleek, light-filled modern extension.
• Single-Storey Extensions – Ideal for kitchens, dining areas, or open-plan living.
• Double-Storey Extensions – Add space on both levels for bedrooms, offices, or bathrooms.
• Side-Return Extensions – Perfect for Victorian and Edwardian properties with narrow side gaps.
• Rear Extensions – Create bright and modern spaces opening onto your garden.
• Wrap-Around Extensions – Combine side and rear expansions for maximum space and light.
• Conservatories & Orangeries – Classic glazed additions for year-round use.
• Loft & Garage Conversions with Extensions – Integrated vertical or lateral expansions for full property transformation.
Construction Standards
Every project we deliver in Barking and Dagenham follows strict quality and safety standards:
- Groundworks & Foundations – Proper excavation and reinforcement for stability.
- Structural Steel & Frame – Precision-installed beams and load-bearing supports.
- Walls & Roofing – Brick match or render finishes; warm roofs with skylights.
- Glazing & Insulation – Energy-efficient windows and doors meeting Part L requirements.
- Internal Finishes – Electrics, plumbing, plastering, and bespoke joinery.
- Building Control Sign-Off – Full certification and long-term warranties provided.
Local Knowledge
We’re familiar with Barking and Dagenham Council’s planning policies and Building Control requirements. Our experience with residential extensions across the borough — from Becontree and Dagenham East to Barking Riverside — means your project is handled efficiently and compliantly from concept to completion.
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 understanding of Barking and Dagenham planning and building rules.
- Full service: design, permissions, structure, and interiors managed in-house.
- Quality assurance: accredited tradespeople and Building Control compliance.
- Transparent costs: fixed-scope quotations with milestone payments.
- Customer care: clear communication and aftercare from start to finish.
With Bigness Group, your extension is built for comfort, performance, and long-term value.
FAQ
Do I need planning permission in Barking and Dagenham?
Many smaller extensions qualify under permitted development, but larger or two-storey builds usually require full planning. We handle all applications on your behalf.
How long does an extension take to build?
Most single-storey projects take 8–14 weeks; double-storey or wrap-around designs take 12–20 weeks, depending on complexity.
Can you match my existing brickwork and style?
Yes — we carefully match materials and architectural details to ensure your new space looks seamless.
Do you work with new builds and period homes?
Absolutely — we adapt designs to both modern developments and older properties.
Our Recent Projects in Barking and Dagenham
Our recent projects across Barking, Dagenham East, and Becontree highlight how a well-designed extension can transform everyday living. From compact side returns to full double-storey builds, each project reflects our attention to detail, precise engineering, and seamless integration with existing homes.
Single-Storey Extensions in London by Borough
Bigness builds professional house extensions across all London boroughs — from Richmond and Wandsworth in the South West to Islington, Barnet, and Hackney in the North and East. Wherever you live, our local teams bring design expertise, planning knowledge, and reliable craftsmanship to every project.
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
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