PQT Construction

Corstone Contractors is a full-service general contractor that specializes in undertaking commercial construction projects. The company offers project evaluation, scheduling, feasibility study, architect selection assistance and planning services. It also provides bidding, pricing, permitting, warranty submission, budget preparation and value engineering solutions. Corstone Contractors coordinates with several financing institutions and offers assistance with release acquisition. The company additionally provides restoration services for damages due to fire and water. Corstone Contractors is located in Snohomish, Wash.

McKinstry was founded in 1960. However, it has a history dating back to 1934. George Allen and Merrill McKinstry formed the company as a result of the death of W.E. Beggs Company owner William Beggs. Like virtually all of the mechanical contractors of the 1960s, McKinstry originated as a plumbing and piping services firm. However, over the following decade, McKinstry added sheet metal, fire protection and temperature controls to its core capabilities and pioneered the design/build method of mechanical construction. McKinstry is now a full service mechanical contractor in the Pacific Northwest, with annual sales in the $100 million range. It employs around 650 staff and field technicians who help deliver a wide range of services, including mechanical construction, engineering, architectural metal, maintenance and facility management to many clients. Headquartered in Seattle, it also has branch facilities in Portland, Ore.