Single and double storey extensions, conservatory conversions, garage conversions and loft conversions across Northamptonshire. Built by a family business with over 50 years of experience.
Tell us about your project and we'll get back to you within one working day.
Tell us about your project and we'll get back to you within one working day.
For over 50 years, Boyson Construction has been transforming homes across Northamptonshire with carefully designed and skilfully built extensions and conversions. Whether you need extra living space, a brighter kitchen, or want to make better use of unused space in your home, we deliver projects that add real value to your property and the way you live in it.
Every extension and conversion we take on is fully project managed in-house. From initial design conversations and planning permission support, through groundworks, structural work, and the final finishes, you have one team responsible for the entire job.
We're a family business with deep roots in Northampton and a reputation built on quality workmanship, reliability, and honest communication. Every project is delivered on time, on budget, and finished to a standard our clients are proud to show off.
The most popular type of extension we build, single storey extensions add space exactly where you need it most. Whether it's a larger kitchen, an extended living area, a new dining space, or a home office, we design and build single storey extensions that flow seamlessly with your existing home. Includes full groundworks, structural works, roofing, and interior finishes.
For families needing more living space and additional bedrooms, a double storey extension transforms how a home functions. We build full double storey extensions including new bedrooms, en-suites, and expanded ground floor living areas. Every project is carefully planned to match the architectural style of your existing property.
Turn your old conservatory into a proper year-round living space. Many homeowners inherit a conservatory that's too hot in summer, too cold in winter, and barely used. We solve this by replacing the existing roof with a fully insulated, solid tiled roof, complete with insulation, plasterboard, and recessed LED lighting. The result is a space that maintains a comfortable temperature all year round and genuinely adds value to your home.
Turn an unused garage into a fully usable part of your home. Whether you want a home office, a guest bedroom, a playroom, or a self-contained annexe, we handle the full conversion, including insulation, structural changes, electrics, plumbing, flooring, and interior finishes. A garage conversion is one of the most cost-effective ways to add genuine living space.
Make the most of unused attic space with a professionally designed and built loft conversion. We handle dormer conversions, hip-to-gable conversions, and full loft conversions including new staircases, en-suites, and Velux windows, adding a full extra floor of usable living space without changing your home's footprint.
"Boyson Construction has worked on a number of projects for me. Initially after buying a 'doer-upper' Pete and team took on the large scale works to get the house into shape. Since then I have gone back to Pete and team for smaller projects knowing that they will offer me the best solution at a fair price and with quality work. The work Boyson Construction complete is always well considered and delivered with quality. The team are trustworthy, polite and courteous and deliver an excellent job with minimum disruption."
Lauren England
"I am writing to highly recommend Boyson Construction. I have known Pete for many years and have on many occasions hired him to carry out work for me, from having an extension at my previous home, to replacing all three bathrooms in another house, plus refitting two kitchens. Throughout the project, I found all the guys who work for Boysons to be professional, dependable, and highly skilled. They completed the work on schedule and were excellent at communicating any updates or changes. The quality of the finished work was outstanding."
Jayne Middleton
"Boyson Construction have been a great addition to our supplier/contractor network here at Northampton Saints RFC. From Summer work renovations to infrastructure projects we always consult with Pete and the team before commencing on these requirements, which ultimately often result in them carrying out the works. Always to a high level and reasonably priced, we will continue to use Boyson Construction to assist us in the future as their trust and commitment to our business is a valued collaboration."
Stuart Jenkins
"As a family we have used Boyson Construction for the past 25-30 years from a major 'back to brick' house renovation for my mother and garage conversion for us to many other smaller jobs in between. Any problem we ring Peter and it's sorted. Peter and his team are professional, reliable and totally trustworthy and I would have no hesitation in recommending them."
Angela Hayden
"Boyson Construction were fantastic throughout the entire project, renovating our home and fitting a beautiful new kitchen. Prompt and clear communication, problem solving and professionalism were the hallmark of our experience. The tradesmen were all wonderful. We cannot recommend Pete Boyson and his team too highly."
Mr M.
"Had a window fitted into the back of my house. It was nice for a builder to turn up in a nice clean van for the quote and actually turn up for the job professionally as well. No hidden costs, very professional and I must say Pete and his team very friendly."
Philip Johnson
One team handling the entire project, from structural work through every trade to final finishes
50+ years of building experience, a family business with deep roots in Northamptonshire
In-house project management, one point of contact from first meeting to final handover
Honest, transparent quoting, clear schedules of work and no hidden costs
We provide extensions and conversions across Northampton and the surrounding Northamptonshire towns and villages, including:
Get a free no-obligation quote for your extension or conversion project today.