High-spec construction, delivered across Bedfordshire and Hertfordshire.

JM Contractors are an established team of builders in Ampthill delivering extensions, full refurbishments and new-build homes across Bedfordshire and Hertfordshire. We work with private clients, architects and developers, managing projects from groundworks through to completion.

Our Work

What We Do

From structural alterations and interior reconfiguration to large-scale extensions and contemporary new builds, we deliver projects end-to-end with a focus on build quality, coordination and attention to detail.

  • Extensions and alterations
  • Full property refurbishments
  • Interior reconfiguration and structural works
  • Architect-led new build homes
  • In-house groundworks and foundations
  • Structural steelwork and alterations
  • Brickwork and external envelope
  • Roofing and weatherproofing
  • High-spec kitchens, bathrooms and finishes
  • Residential developer projects

Testimonials

We selected JM Contractors for their understanding of our vision and their ability to deliver the architect’s plans with care and precision. The team were efficient, reliable and highly skilled, even while we remained living in the property. We were delighted with the high-end finish and would gladly recommend them.

We used JM Contractors to build our home and the standard of workmanship was excellent. Everyone involved was helpful and knowledgeable, and Jamie was always on hand to guide us through planning and building regulations. We would happily recommend them to anyone undertaking a building project.

From start to finish, the quality of work was excellent, with close attention to detail and clear, honest communication throughout. The team were highly skilled, professional and a pleasure to work with. We would not hesitate to recommend JM Contractors.

Who We Are

Jamie Smith and Matt Lewzey

Founded in 2008 by cousins Jamie Smith and Matt Lewzey, JM Contractors has grown into a trusted team of builders based in Ampthill, working across Bedfordshire and Hertfordshire. Today the business is a hands-on team of 17, supported by a long-standing network of experienced delivery partners.

The most important thing we build is trust. Through careful planning, clear communication and experienced delivery, we ensure every project is completed to the highest standard.

Our strength lies in end-to-end delivery. Key stages – including groundworks – are delivered in-house, reducing reliance on third parties and maintaining control throughout the build. Projects are priced carefully against the agreed scope and specification, giving clients clear and realistic figures from the outset.

We work directly with private clients and collaborate with architects and residential developers on selected projects.

Contact

Planning a new build or renovation? Speak to Jamie about your project.