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Home Extensions

Kitchen extensions, side extensions, wrap around extensions, rear extensions, roof extensions, single storey extensions, double story extensions & garage extensions.

Home Improvements

Loft conversions, garage conversions, internal renovations, external renovations, bathrooms, kitchens, flooring, replacement doors, general repairs and much more.

New Builds

New builds all the way from concept to the finished build. Whether you already have plans or need help in planning our experienced team will be about to assist you.

WE ARE THE LEADING PROVIDER OF HOME EXTENSIONS, HOME RENOVATIONS AND NEW BUILDS IN HITCHIN, STEVENAGE, LETCHWORTH, BALDOCK AND HERTFORDSHIRE COUNTY.

DMH Building Contractors are Hitchin Hertfordshire’s premier  builders for home extensions – kitchen extensions, side extensions, wrap around extensions, rear extensions, roof extensions, single storey extensions, double story extensions & garage extensions. We specialise in a wide variety of successful bespoke home extension projects in Hitchin, Letchworth, Baldock, Stevenage and the wider Hertfordshire area, designed to expand your living space and breathe a new lease of life into your home, inside and out.

With a home extension in Hitchin, Baldock, Stevenage, Letchworth, you could make more space for a growing family or add value to your property where house values in Hertfordshire are strong.  Our extension designs are drawn up by our qualified, experienced home extension builders in Hitchin & Hertfordshire who can bring them to life in a matter of weeks. 

DMH Builders also do home renovations, from small home improvements like new flooring to larger projects such as loft conversions.

DMH Builders can also build you a new home from scratch with extensive experience with new builds in Hertfordshire.

Single Storey Extension2
Kitchen Extension
Extended living space
Living room extension
Loft bathroom
Single Storey Extension
Single Storey Extension Bi Folds
Kitchen
Bi Fold doors
Kitchen Renovation
Dining Space
Wrap around extension
Side extension
Modern living space
Kitchen Hitchin
Extension roof window

Why Choose Us?

We are very proud that we are now the 3rd generation in the Hamilton family to carry out this trade. Decent, honest team that truly has an eye for detail and take pride in each and every project.
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Price Promise

We pride ourselves on providing the best service and prices possible but in the event that you are quoted less elsewhere let us know before the start of the project and we’ll see if we can match it under our price promise.
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Free Consultation

Have a concept you would like to discuss to get an idea of costs? We would be delighted to have a chat, visit and provide you a quote. No obligation or any pressure selling.
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Trustworthy Builders in Hitchin

DMH Builders were fantastic from start to finish on our home extension in Hitchin. Great communications from the first phone call all the way to the work being finished. Builders were on time everyday and tidied up after themselves. The double story extension was finished to a very high standard. If you're looking for reliable builders in Hitchin we would highly recommend them and we have already recommended them to our friends. Thanks again to David and his team - Doreen Jones

Hours of works
Completed projects
Happy Customers
Years experience

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