House Extension Builders in Somerset
Is your home starting to feel a little too small? We deliver high-quality house extensions across Somerset and the South West – the perfect way to evolve your living space without the stress and expense of moving.
Our Home Extension Services
We’ve been helping local homeowners transform their properties since 1987.
As one of the most established house extension companies in Somerset, we
bring over 35 years of experience to every brick we lay.

Local Home
Extensions
Whether you’re looking for a rear, wrap-around, or multi story extension to expand your living space and add value to your home – our local team of Building Craftsmen can helpp.

Conservatories
& Orangeries
Our orangery and conservatory extensions are designed with solid masonry and high-spec roofing to ensure they are thermally efficientin winter and cool in summer.

Garden Rooms
& Offices
We build architectural-grade garden rooms that are fully insulated, wired for power and data, and built to the same exacting standards as a primary residence.
Whether you have a modern semi-detached or a traditional detached property,
we specialise in various home extension styles to help you get the most out of your space.

Rear House Extensions
A rear extension is a popular choice for opening up the back of your home. It’s an ideal way to create a larger, more social living area or a spacious kitchen-diner.

Two-Storey Extensions
When you need a significant amount of extra room, a two-storey extension is often the most effective solution, allowing you to build on both levels.

Wrap-Around Extensions
This is the ultimate transformational house extension, allowing for entirely new layouts, utility rooms, and ground-floor kitchen and shower rooms.

Kitchen & Dining Transformations
We work closely with kitchen designers and architects to ensure the skeleton of your extension is perfectly placed for your new kitchen and dining layout.
Frequently Asked Questions
Not always. Many smaller home extensions in Somerset fall under Permitted Development, meaning you don’t need full planning permission as long as you stay within certain limits.
However, if your home is a listed building or in a conservation area, the rules are stricter. During our initial consultation, we can help you understand what’s likely to be required.
Every project is unique, but most single-storey house extensions take between 10 and 16 weeks to reach completion. Larger two-storey projects or complex wrap-around extensions can take longer.
We provide a realistic timeline at the start of your project so you know exactly what to expect.
Costs can vary depending on the size, the materials used, and the complexity of the groundworks. We always provide detailed, itemised quotes rather than vague estimates. This ensures you can plan your budget with confidence, knowing there are no hidden surprises.
In most cases, yes – significantly. Adding a high-quality home extension to your Somerset home that increases your bedroom count or creates a modern, open-plan kitchen is one of the most reliable ways to boost your property’s market value.
We focus on ensuring the new build integrates perfectly with the original structure, which is key to maximising that return on investment.
While we build year-round, many homeowners prefer to break ground in the spring or summer to take advantage of better weather for the initial groundworks and structural phases.
However, starting in the autumn can often mean your new space is ready and fully decorated just in time for the following spring. We can manage the project effectively regardless of the season.
Our Extension Building Process
We know that adding an extension to your home is a big commitment. That’s why our process is designed to make the journey as smooth as the final finish:
1. Initial Consultation – We visit your home to discuss your vision, budget, and the feasibility of your ideas.
2. Detailed Proposal – Once we’ve understood the scale of the build, we’ll put together a straightforward breakdown of the costs.
3. The Build – Our tradesmen take over the site, handling everything from the initial digging and foundations to the structural work.
Why Choose Us for Your Extension?
No Subcontractors, No Delays
We send our own team of specialists to your site. This ensures better communication, tighter security, and a level of consistency in the brickwork and joinery that is second to none.
Technical Oversight & Budget Control
We treat every house extension in Somerset and the South West with professional rigour. We provide detailed, transparent costings upfront and manage every stage of the build to ensure it stays on time and within budget.
Over 35 Years of Expertise
From the seamless integration of new floorboards to bespoke storage solutions and high-end roof timbers, we focus on the details that make an extension feel like a home. The “finish” of our extensions is where we truly shine.

Decades of Happy Clients
We’re incredibly proud of the reputation we’ve built over the last 35+ years.
Here’s a glimpse of what our customers have to say about working with our team:
Doing whole house renovation for us after the fire. Really good company, work so far been of really good quality, fantastic communication from Kevin and Neil – always on hand to help, answer phone and emails promptly, hard working and helpful.

We’ve worked with Building Craftsmen on several projects over the years, and they’ve never let us down. Their attention to detail, communication, and ability to deliver on time is second to none. A dependable contractor who always goes the extra mile.

BCY and the team made the process seamless from start to finish. We couldn’t be happier with the result, the house is everything we wished for. All suppliers were extremely friendly and tidy throughout the project. We were particularly impressed with the communication and attention to detail.”


Ready to Extend
Your Home?
If you’re looking for a trusted extension builder in Somerset to help you create more space, we’re ready when you are. Let’s discuss how we can create a space that perfectly fits your lifestyle and your budget.