William Trehy


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About William Trehy

William Trehy & Associates provide a professional solution to Engineering and Project Management requirements of individuals, small to medium size businesses, architects, developers, contractors and subcontractors

Products & services

building contractors


We can provide a general engineering over view of a proposed project in the form of a detailed report outlining key items that may need to be addressed immediately or which will affect the works or c…

private developers


We can provide a full detailed design of foul water drainage networks, surface water drainage networks, Service ducting networks, water main networks, steelwork, reinforced concrete, foundations, roo…

civil contractors


This service includes the compilation of calculations, construction drawings and specifications, the works that we cover are small bridge works, cattle underpasses, retaining walls, drainage, culvert…

agricultural works


The certificates can be issued on the basis of pre-agreed increments or on an admeasurement basis, so whether there is a main contractor appointed or not and the works is completed by direct labour, …

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