WELCOME TO DATUM BUILD
You dream it. We build it.
House extension, renovation, refurbishment and conversion specialists in Watford, London, the Home Counties & beyond. Your home transformation starts here.
Full service builders
We cover everything – interiors, exteriors, bricklaying, plumbing, electrics, gardens, roofing, and much more.
Loved locally
We’ve built a proud reputation as one of the friendliest, most trusted building firms in Watford & the Home Counties.
20 years' experience
We’ve been delivering top quality transformations and satisfied customers just like you for more than two decades.
Proud Reputable Tradespeople
The builders who care about your home as much as you do
Datum Build is a full-service building and home improvement company, based in Watford and serving the surrounding area,
including London, the Home Counties and beyond.
Your home means the world to you, so your project means the world to us. We’re committed to delivering your vision with the added ‘wow’ factor – which is why we only deliver the very best in quality and service.
Home improvement services in Watford, London, the Home Counties and beyond
Home Extensions
One contractor for everything: design, building control compliance, project management, and all interior and exterior works.
Refurbishments & Renovations
Shaping and executing your vision, whether enhancing a single room or transforming an entire house.
Loft Conversions
A professional approach to your loft space, creating comfortable, well-insulated, easily accessed living spaces.
Let’s start your home transformation
Giving builders
a good name
We understand the things that matter to you, and your biggest potential concerns. That’s why your priorities are our priorities, too:
Proud Reputable Tradespeople
Explore our builds
Grade II Listed Farm, Leverstock Green
Rear Extension, Tring
Hill Farm, Berkhamstead
Garden Gym, West London
Proud Reputable Tradespeople