Do more with less
Engineered buildings that revive the places they touch.
We started with a simple goal: to create well‑designed, well‑built spaces that improve people’s lives. Over 21 years, we have built extensions, studios, and new homes for families, businesses & communities across our region .
But the more we build, the more we see how construction affects the land around us. Cleared soil. Lost habitats. less wildlife, fewer wild places.
That’s why we are evolving — we are changing our methods, & partnerships with an approach to building that restores nature instead of removing it.
Custombuilt is built on a simple belief: We can build less, restore more, and still create beautiful spaces for people to live, work, and connect.
Every project is designed to:
Use fewer resources through modular, low‑impact building
Restore ecosystems with native planting and habitat creation
Reconnect people with nature through shared outdoor spaces
Measure real ecological outcomes, not just make claims
This isn’t sustainability. This is regeneration.
About us
What We Do Now
Design and build the spaces people need — extensions, studios, garden rooms, and small structures — but now every project includes:
Habitat‑positive design
Soil and water restoration techniques
Pollinator‑friendly planting
Wildlife corridors and green infrastructure
Low‑resource construction methods
Your project becomes part of a bigger picture: restoring the land, not taking from it.
Our Expertise
Industry Experienced Design and build service delivered by skilled Tradesmen
Written Quotes & Schedules
Health & Safety Compliant
20 years Construction Industry trading
Fully Insured Company
We deliver modular solutions
for your extra space
Custombuilt home extensions offer an advanced approach to expanding your living space.
Advantages of Custombuilt system
- Efficient Installation: we embrace off-site construction to minimize disruption to your home life
- Cost-Effective: by a simplified building process, that is on a personalized scale without large scale set-up costs
- Sustainability Benefits from materials and designs that promote energy use & reduce resource consumption
Great design flexibility to acheive the look you want
Why choose Custombuilt ...
Designed to enhance your home
Individually built with Craftsmanship
Experienced Project Management
See some of our past projects with 60+ posts here
Questions you might have
Q. How does we construct home extensions differently to traditional extensions
A. Our prefabricated frames replace traditional blockwork wall for your extension. Made away from your home in offsite workshops using insulated panels. This system is usually reserved for large scale developers.
Q. Why use modular building for your domestic extension
A Less disruption, more quality consistency, better thermal performance, thinner walls, more design flexibility, less delays
Q. Why change from traditional building to modular home extensions
A. For over 10years we built traditional buildings, During a 3 year advanced construction program became involved in modular construction, where the benefits were clear to see.. Ever since we've developed & integrated these techniques to our individual residential projects.
Q. Are modular extensions accepted by mortgage companies and building surveyors.
A. Yes. Advances in modular techniques over recent years mean that financial institutions , surveyors & valuers now embrace and encourage modern and modular methods of construction.
Q. How will a prebuilt extension add value to my property.
A. Additional living space when combined with a robust specification and thoughtful design, will enhance your property's appearance and value.
Q. Will a new extension improve my home.
A. Well planned additional space can transform your living experience. Our extensions can also massively increase the thermal performance of your home reducing heat loss and heating costs.
Read what our past customers say about Custombuilt
Recent Projects & Reviews
"We wanted an extension to our house. I honestly had no idea where to start. Custombuilt helped design the ideas I had in my head and made the extension possible. All the things that were jargon to me or beyond my knowledge they would be there to support and make the extension work run smoothly. Excellent communication, very reliable. Highly recommend this company, Thank you again!"
Camilla Davenport Single storey Extension, Sheffield
"I required an extra room, I had no plans or architects drawings. Custombuilt sent me some wonderful pictures, of what the end result could look like. From my initial idea, and the great expertise of Custombuilt, a fantastic extension was created. Pete and his team worked diligently through all manner of weather, and problems that were thrown at them, and I am so pleased, delighted in fact, with the result. I would not hesitate to recommend Pete and his team to anyone with an idea in their head. Sometimes dreams do come true. Many thanks "
Wendy Schofield, Single Storey extension, Chesterfield
PROJECT: Property remodeling
Single storey and double extensions
Loft conversion
Extensive renovation with CO2 & Energy saving systems
Create new bio-diverse habitats
"We had Custombuilt to do our double storey and single storey extension, plus complete renovation of our 1930's home. Pete project managed the whole thing with his team. On site everyday, with his trusted trades. His communication was second to none - kept us in the loop as we weren't on living on site. Plenty emails, what's apps and phone calls - talked us through each part of the process, which was very reassuring particularly when your spending large sums of money! There was barely a snag list at the end as he was so thorough but the little things there were got sorted super quick. Would highly recommend using Custombuilt, had complete trust and we have a beautiful home as a result. Thank you"
Miranda Murray, Single and double storey Extensions, Sheffield
3 storey extension , Renovation and
Loft conversion in Peak District
Engineered first floor solution
Recent client comments
"We committed to using sustainable materials and minimizing the carbon footprint where we can. The reduced need for heating and the addition of solar panels all contribute to lowering the structure's environmental impact."
"The extension is an enjoyable experience. Integrated entertainment, wi-fi connections, smart lighting, and underfloor heating all controlled on our apps."
"The open-plan design offers flexibility in room layout and the new garden room is a brilliant space to unwind."
"We've noticed a difference with the new extension. The rooms remain warm, free from drafts, providing a cozy and relaxing environment, even on the chilliest days."