Pettit Singleton Associates (PSA) is one of the North West’s largest Building Services Engineering practices, with offices located in Preston and Carlisle.

Our team’s mission is to provide the highest standard of service to our clients, with the aim of creating strong and trusted relationships whilst offering innovative, practical, and value-for-money building services solutions.

This has led to PSA being awarded many prestigious and technically demanding projects, such as the refurbishment of the Listed Christ Church building into the new Maritime Museum, the new Cumberland Sports Village, the first non-domestic Passivhaus (EnerPHit) compliant office refurbishment at Voreda House and the electrical design for the new solar PV at the Workington Leisure Centre.

As well as our unrivalled experience in healthcare, having worked for most of the North West’s NHS Trusts, we also have strong ties to education, public sector, industrial, commercial, leisure, and defence sectors.

The key to our success and growth over the years has been our total commitment to quality and service that is reflected in the projects we deliver.

Ultimately, our success can only be measured by client satisfaction, which is why we are proud that over 80% of our work is repeat business from existing clients.