The Federation of Master Builders

J Harris Design & Build Limited

J Harris Design & Build Limited, Stevenage, Hertfordshire, SG1 3JN

Trading Address

10 Primrose Hill Road,


Tel: 07890 681129
Contact: Email us

When calling, please remember to say you got their number from the FMB website

Member details

Joined: 25/03/2015


J Harris Design & Build Ltd are a family run building contractors, now in their 4th generation. Based in Stevenage, we work in Hertfordshire and the surrounding area, covering all general building work and specialising in home extensions and loft conversions. 

We are known for our customer focused approach, with clear lines of communication that are geared towards delivering clients with a personal service which puts their requirements first. We deliver on time, on budget and with maximum attention to detail, with a high quality finish every time.

J Harris Design & Build are currently working alongside some of the leading architects in London and Hertfordshire on projects in the area. We have the technical knowledge and details that will turn your project from concept into something truly special. 

We offer an itemised costings spreadsheet as part of our quotation pack and have a Fixed Price Guarantee that gives you full peace of mind that your budget is in good hands.

All of our tradesman are highly qualified with years of experience. Our services include:

  • Architectural drawings
  • Engineers calculations
  • Full planning
  • Home extensions
  • Loft conversions
  • Roofing 
  • Landscaping & ground work
  • Bathroom installs
  • kitchens installs
  • Ceramic tiling 
  • Plastering
  • Rendering
  • Flooring
  • Plumbing and electrical work
  • Windows 
  • Driveways
  • Structural steel work
  • Bespoke carpentry
  • Stair cases


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