Extensions & Structural Work
RSJ installation, load-bearing wall removal, foundations, shell builds, and complete extension projects.
Learn MoreOne team for every trade. Extensions, roofing, groundworks, renovations, carpentry and landscaping — all under a single contract, with one point of contact from foundations to finishing. Founded by Denis and Daniel, built on capability.
What We Do
One team, every trade, one contract. No juggling separate roofers, groundworkers and carpenters — we manage every phase in-house with precision engineering and reliable project control.
RSJ installation, load-bearing wall removal, foundations, shell builds, and complete extension projects.
Learn MoreEPDM, insulated warm roof systems, skylights, fascia, soffit, and complete roofing solutions.
Learn MoreExcavation, concrete footings, drainage, soakaways, and retaining walls to engineer specifications.
Learn MoreLayout reconfiguration, rewiring, plastering, flooring, UFH, and complete interior finishing.
Learn MoreFirst and second fix, stud partitioning, stairs, doors, skirting, and kitchen preparation.
Learn MorePatios, fencing, gates, pathways, steps, and garden regrading for practical outdoor spaces.
Learn MoreWhy Choose Us
Denis and Daniel founded DNDH with one principle: deliver engineered-quality construction with reliable project control.
From RSJs to load-bearing walls, warm roofs to full shell builds. Zero compromise on technical accuracy.
Clear scheduling and consistent communication. You'll always know what's happening on site and what's next.
Foundations, drainage, blockwork, carpentry, roofing, internals and landscaping—all delivered by one team under one contract. No subcontractor blame games, no gaps between trades.
See Our Work
Testimonials
"Dan and Denis have completely transformed our house into the home of our dreams. Their craftsmanship, knowledge, and attention to detail are second to none. Couldn't recommend them more highly."
"Denis and Dan recently carried out the works to the corner of our house. We are absolutely thrilled with the job from start to finish—nothing but professional. Thanks to these guys we have had our vision come to life!"
"Dennis and his team done an excellent job on our double story extension in Letchworth. The work was very neat and tidy and above standard. Dennis done lots of extra jobs also with no issues. Definitely recommend these lads."
Our Work
Get a free estimate within 24 hours. In a hurry? Send us a photo of the job on WhatsApp and we'll come back with a fast ballpark quote — no site visit needed to get the ball rolling.