Croeso i Peirianneg Sifil Gelli / Welcome to Gelli Civil EngineeringGelli Civil Engineering was established in May 1990 and is a family run business. The company carries out civil engineering highways projects and maintenance work as main contractor for a range of north and mid Wales public sector bodies.

In March 2015 the business moved to larger premises at the historic Market Hall in Tremadog and is celebrating 25 years in business. The company’s objective is to provide and maintain a high standard of workmanship, using a local supply chain.

AccreditationsThe company is accredited to ISO 9001; ISO 14001 and will be accredited to OHSAS 18001
in June 2015; CHAS; Constructionline; Investors in People and Considerate Constructors
Scheme. We are also members of CITB ConstructionSkills and CECA (Wales).