House Extensions in Southend-on-Sea by Local Builders
Looking to expand your home in Southend-on-Sea? BTOM Construction specialises in high-quality house extensions, delivering complete build solutions from foundations to final finish. As experienced local builders in Southend, we create functional, long-lasting extensions tailored to your property and lifestyle.
From rear extensions and open-plan layouts to full structural alterations, we handle every stage of the project with precision and compliance with UK building regulations.
TYPES OF EXTENSIONS
We build all types of house extensions in Southend-on-Sea, including:
- Rear house extensions
- Side return extensions
- Wrap-around extensions
- Kitchen extensions
- Single and double storey extensions
Each extension is designed to maximise space, improve layout and increase property value.
FULL BUILD SERVICE
As a full-service building company in Southend, we manage every part of your extension:
- Groundworks and foundations
- Structural steel installation (RSJ)
- Brickwork and blockwork
- Roofing systems (including warm roof construction)
- Windows, doors and bifold installations
- Plastering and internal finishing
We ensure all work meets current UK building standards and is built for long-term durability.
STRUCTURAL WORK
Most house extensions require structural modifications. We specialise in:
- Load-bearing wall removal
- RSJ steel beam installation
- Creating large open-plan spaces
- Supporting upper floors and roof loads
All structural work is carried out safely and in line with engineering requirements.
COST OF HOUSE EXTENSIONS IN SOUTHEND
The cost of a house extension depends on size, design and structural complexity. Typical ranges:
- Small extensions: from £25,000
- Medium extensions: £40,000 – £70,000
- Larger projects: £80,000+
As a rough guide, extensions in Southend typically range between £1,800 – £2,500 per m², depending on specification.
We provide clear, fixed quotes with no hidden costs.
LOCAL BUILDERS IN SOUTHEND
We are based in Southend-on-Sea and regularly work in:
- Westcliff-on-Sea
- Leigh-on-Sea
- Shoeburyness
- Rochford and surrounding areas
Working with local builders ensures faster response times, better coordination with Southend building control, and a smoother overall project.
PLANNING PERMISSION
Do you need planning permission for a house extension in Southend?
Many extensions fall under permitted development, but larger or more complex projects may require planning approval. We can guide you through the process and work alongside architects or structural engineers when needed.
WHY CHOOSE US
- Experienced builders in Southend
- Full design and build service
- Strong structural knowledge (RSJ, load-bearing work)
- High-quality workmanship
- Real completed projects locally
RECENT PROJECTS
OTHER SERVICES
As local builders in Southend-on-Sea, we provide reliable home improvement and renovation services across the Essex region.
No rushed work, no hidden extras — just clean workmanship and clear communication from start to finish.
QUALITY GUARANTEE
We take pride in doing things properly — strong structure, clean finishing and clear communication throughout the project.
All work is completed to UK building standards and inspected at each stage, ensuring your home is safe, solid and built to last.
We don’t rush jobs or cut corners. If we build it, we build it properly.
FREE QUOTE
Tell us a bit about your project and we’ll get back to you with a clear, no-obligation quote.