About Us
A family-run building company with family values at its core — based in Harlow and usually working within one hour. Cambridge is a specific service-area exception.
JB Building
Projects Ltd
JB Garage Conversions is a family-run construction company based in Harlow, Essex, specialising in garage conversions, home extensions, refurbishments and structural steelwork. We normally work within about one hour of Harlow, with Cambridge also included.
Founded on the belief that every family deserves a home that truly works for them, we transform underused spaces into beautiful, functional rooms that families actually live in — playrooms, home offices, extra bedrooms, and open-plan living spaces.
We're not a large faceless contractor. We're a tight-knit team of skilled tradespeople who take genuine pride in every project we complete. From the first conversation to the final handover, you deal directly with us — no middlemen, no subcontracted strangers, no surprises.
10 Years
Workmanship Guarantee
Business-backed
£14k+
Full Single Guide
starting price
3
Detailed Case Studies
real project photos
Family Values
We treat every home as if it were our own. Respect, care, and honesty are non-negotiable on every job.
Public Liability Insurance
Ask us for current public liability insurance details. Each project follows the building-control route agreed for its scope.
Quality Craftsmanship
Every finish is inspected before handover. We don't cut corners — ever.
Local Specialists
We know our Harlow-centred service area and Cambridge projects. Local knowledge, local reputation, local pride.
Fixed-Price Contracts
The price we quote is the price you pay. Fully legal contracts provided for your protection.
End-to-End Service
Planning, building regs, construction, and certification — all handled under one roof.
Meet James Benton, of JB Garage Conversions
James Benton
Director, JB Garage Conversions
"Before I'm a builder, I'm a dad. Family is everything to me — and that shapes every single project I take on. I want to create spaces that are safe, warm, and full of life for the families who live in them."
James Benton is the director, founder, and driving force behind JB Garage Conversions. A qualified builder and carpenter with extensive hands-on experience, James started the company with a simple mission: to deliver the kind of quality and honesty he'd want for his own family's home.
As a father himself, James understands what it means to need more space — and what it means to trust a tradesperson in your home. That's why he insists on being personally involved in every project, from the initial survey right through to the final walkthrough.
James and his team have completed projects throughout the areas they serve — from single garage conversions to full home extensions — and every one has been approached with the same care and attention to detail he'd give his own home. If you want to know the questions to ask before appointing a builder, James has written a practical guide covering exactly that.
Our Ethos
Safe
We coordinate each conversion against the agreed drawings, specification and building-control inspection route. Safety-critical details are planned, checked and documented.
Warm
Proper insulation, efficient heating, and quality finishes mean the spaces we create are genuinely comfortable to live in — not just on paper.
Loving
We build spaces where families make memories. Playrooms, living rooms, bedrooms — every project is built with the people who'll use it in mind.
Our Credentials
Public Liability Insurance
Ask us for the current public liability insurance details applicable to your proposed project.
Building Regs Managed
Where included in the quotation, we coordinate applications and inspections. The building-control body decides whether to issue the completion or final certificate.
Written Contracts
Written contracts provided for every project — your rights and our commitments, clearly defined.
Customer Reviews
Read our customer reviews on Google and Trustpilot.
Federation of Master BuildersMember 174504Learn about our FMB membership Let's Build Something
Your Family Will Love
Tell us about your project. We will call as soon as possible, usually within an hour during 8am–8pm. Please allow up to 24 hours when demand is high.