Bournemouth · Poole · Christchurch
Add Space & Value to Your Home Fixed-Price Conversions & Extensions
Fixed-price garage, loft and extension conversions and full renovations across Bournemouth, Poole and Christchurch. Create more space, add value and improve the way you live — without the stress of moving, and with a clear price from day one.
- Create more space
- Add value
- Improve the way you live
About Us
The Big Conversion Company Ltd.
At The Big Conversion Company, we pride ourselves on delivering high-quality, reliable, and professional building services across Bournemouth and the surrounding areas. From Loft and Garage conversions to Home Extensions and bespoke Kitchen and Bathroom renovations, we’re here to help you transform your space with ease and confidence.
Guided by our values of craftsmanship, transparency, and genuine customer care, we make the process smooth and stress-free — treating every home as if it were our own. Your peace of mind is just as important to us as the finished result.
- Garage conversions
- Loft conversions
- Home extensions
- Kitchen renovations
- Bathroom renovations
- Full refurbishments
Our Services
Great Conversions From Concept To Creation
We specialise in fixed-price garage conversions, loft conversions, home extensions and full renovations across Bournemouth, Poole and Christchurch.
Garage Conversions
Turn unused space into a functional living area — often without the need for planning permission. Ideal for home offices, playrooms, guest bedrooms and annexe spaces.
Learn more
Home Extensions
Expand your home and completely change how you live. We deliver rear extensions, side extensions and open-plan kitchen living spaces.
Learn more
Home Refurbishments
Completely upgrade your home to suit your lifestyle — full house refurbishments, layout reconfigurations, kitchen and bathroom upgrades.
Learn more
Loft Conversions
Maximise your home’s potential by transforming your loft into valuable living space. Perfect for additional bedrooms, en-suites and office space.
Learn moreInstant estimates
What could your project cost?
Use our free cost calculators for an instant guide price — no details required.
- 18+
- Years In The Industry
- 200+
- Happy Clients
- 200+
- Projects Completed
- 10+
- Trained Staff
Why Choose Us
The right conversion company can make or break your project
Fixed-price quotes
Fixed, upfront pricing — a clear quote from day one, never vague estimates.
Trusted trades, high standards
Using trusted trades and maintaining high standards.
We deliver what we promise
Delivering exactly what we promised.
Efficient project management
Managing projects efficiently to minimise disruption.
Many of our clients come to us after receiving confusing or incomplete quotes — we do things differently by ensuring everything is considered from the start.
Additional Services
We Also Offer
The Big Conversion Company also offer additional services which may interest you. Our fully qualified team are able to carry out any sort of home renovation project.
Kitchen Renovations · Bathroom Renovations · Plumbing & Heating · Electrics · Roofing.
Our work
Current and completed projects
A selection of real projects carried out by our team across Bournemouth, Poole and Christchurch.
Don't Know Where To Start?
We are here to help. If you have any questions or want to enquire more regarding one of our services, then contact our team today.
Why homeowners choose The Big Conversion Company
- Fixed-price quotes — you know the full cost before we start, with no surprises
- Garage, loft and extension conversions plus full renovations under one team
- Trusted local trades working to high standards across Bournemouth, Poole & Christchurch
- Efficient project management that keeps disruption to your home to a minimum
- We deliver exactly what we promise, treating your home as if it were our own
Garage conversions that add a whole extra room
A garage conversion is one of the most cost-effective ways to gain a new room — a home office, bedroom, playroom or snug — without moving or extending your footprint.
We handle everything from insulation, flooring and plastering to windows, heating and electrics, so your converted garage feels like a natural part of the home. And because our pricing is fixed upfront, you'll know exactly what your garage conversion costs before any work begins.
Conversion questions, answered
How much does a garage or loft conversion cost?
Do you cover my area?
Will I need planning permission?
How do I get started?
Reviews
What Our Customers Have To Say!
Rated 5.0 from 18 Google reviews
“Excellent all round from start to finish , used twice now , highly recommended”
Richie
“Our extension looks amazing, the team were prompt, knowledgeable, tidy and efficient. Highly Recommend.”
Lorraine
“Matt at the Big Conversion company was great. His company installed our new kitchen for us. Work was completed on schedule to a high standard. He was friendly, polite and coordinated well with all the other contractors we were using.”
Gail Stuart
“Matt and his team have helped us out with a number of projects and each time they have delivered 100%. We had our main ensuite bathroom completely remodelled and then an extension to create a downstairs guest room with ensuite.”
Marcus Cahill
“Matt and co. converted our large garage into a granny flat with a full utility. Matt and his team were great at communicating through the whole development.”
Adam
“Matt was really responsive from the point of requesting & providing a quote for the works, tweaking the quote when we made changes, and fulfilling the job within the estimated time frame.”
Kieran McNeill
Frequently asked questions
Do I need planning permission for a garage conversion?
Do I need planning permission for a loft conversion?
Do I need planning permission for an extension?
How long does a garage conversion take?
How long does a loft conversion take?
How long does a home extension take?
Ready for Your Fixed-Price Quote?
Whether you're planning a garage conversion, loft conversion or extension, our team is here to help. Tell us about your project and we'll give you a clear, fixed-price quote with no obligation.