House Extensions in Tower Hamlets

At Bigness Group, we design and build exceptional house extensions in Tower Hamlets, helping homeowners transform their East London properties into modern, spacious, and light-filled homes.
From Georgian terraces in Stepney and Mile End to converted townhouses in Bow and Canary Wharf apartments, we create bespoke extensions that respect London’s historic architecture while adding contemporary functionality.

We manage the entire process — planning, design, engineering, and construction — ensuring your extension is delivered on time, on budget, and to the highest standard.

Design and Build Services

Our Tower Hamlets design-and-build team provides a complete end-to-end service:

• Full measured survey, design concepts, and 3D visuals

• Planning and permitted development management with Tower Hamlets Council

• Structural calculations and Building Control coordination

• Kitchen, dining, and interior planning for seamless flow

• Dedicated project management and milestone reporting

With Bigness Group, you work with one accountable team from start to finish — ensuring precision, transparency, and efficiency.

Types of Extensions We Build

We deliver all major types of house extensions in Tower Hamlets, including:

• Glass Box Extensions – Contemporary designs with clean lines and glass features.
• Modern House Extensions – Minimalist architecture with clean geometry and light.
• Single-Storey Extensions – Perfect for kitchens, dining, and open-plan spaces.
• Double-Storey Extensions – Add upper-level rooms or expand living areas below.
• Side-Return Extensions – Ideal for terraced homes in Bow, Stepney, and Limehouse.
• Rear Extensions – Create bright, modern garden-facing living spaces.
• Wrap-Around Extensions – Combine side and rear layouts for maximum space.
• Conservatories & Orangeries – Elegant, glass-rich designs for all-year use.
• Loft & Garage Conversions with Extensions – Expand vertically or convert existing structures.
• Basement Extensions – Create gyms, cinemas, or private lounges below ground.

Construction Standards

Every Bigness project in Tower Hamlets follows our structured six-step process:

1. Groundworks & Foundations – Engineered for urban soil conditions and tight access sites.

2. Structural Framework – RSJs and beams installed for strength and open-plan flow.

3. Walls & Roofing – Brick match, render, or cladding with superior insulation.

4. Windows & Glazing – Energy-efficient systems compliant with UK regulations.

5. Interior Finishes – Full electrical, plumbing, and bespoke joinery fit-outs.

6. Final Certification & Warranty – Building Control approval and workmanship guarantee.

Local Knowledge

We have extensive experience working with Tower Hamlets Council’s planning and conservation requirements, including heritage areas in Mile End, Spitalfields, and Bow.
Our team ensures that every extension meets local standards while enhancing your property’s design, energy efficiency, and long-term value.

Costs and Financing

Every extension is unique, but here’s a general guide:

💡 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.