New-build homes
Carefully managed homes, built around your plans, your site and your future.
View serviceDonegal · Derry · North West
Built properly.
Built to last.
Trusted local construction expertise for new homes, renovations, commercial projects and specialist Passive House builds.
25+ yearsHands-on industry experience
Local expertiseServing the North West
Passive HouseCertified consultant in-house
What we do
Complete construction expertise
From the first groundwork to the final finish, we bring care, skill and clear communication to every stage.
Extensions & renovations
Thoughtful upgrades that add space, comfort and lasting value.
View servicePassive House construction
High-performance buildings designed for comfort and efficiency.
View serviceCommercial construction
Dependable delivery for practical, professional commercial spaces.
View serviceGroundworks & site development
A solid start for every project, completed with care and experience.
View serviceMica rebuilds
Considered rebuild solutions for homes affected by defective blocks.
View serviceWhy Triarch
Local people.
Professional standards.
Triarch Construction Ltd is a new company built on decades of practical experience across multiple trades. We combine local knowledge with a commitment to excellent workmanship.
Our storyHands-on building experience since 2000
Trusted network of skilled tradespeople
Quality workmanship at every stage
Direct, straightforward communication
Specialist expertiseBrian GrantCertified Passive House Consultant
Planning a project?