Quality workmanship
Careful work, sound materials and proper attention to detail.
About Triarch
Experience behind every build.
A locally based construction company bringing decades of hands-on knowledge to projects across Donegal, Derry and the wider North West.
Our story
New company. Proven experience.
Established in 2026, Triarch Construction Ltd is backed by hands-on building industry experience dating back to 2000. That experience spans multiple trades and gives us a practical understanding of what it takes to deliver work properly.
We created Triarch to offer clients a dependable local construction partner: skilled, straightforward and committed to quality. Whether we are building a new home, extending an existing property or delivering specialist high-performance construction, our standards stay the same.
Trusted locally
Strong relationships and straightforward communication from start to finish.
Specialist expertise
Brian Grant is a Certified Passive House Consultant.
Talk to our team