Who we are

Corstone Contractors LLC is a full-service general contractor in the greater Seattle area, providing commercial general contracting services for new construction, Tenant Improvements, and remodels.


Corstone has extensive experience with retail, restaurant, veterinary/healthcare, and commercial projects across the Western States region. Our experience spans occupied remodels, additions/upgrades, and new construction for numerous corporate clients, developers, franchisees and private owners. Our ability to constantly deliver projects on tight deadlines has been key to establishing long lasting relationships with repeat customers.

Corstone is a general contractor located in the Seattle area and serving the entire Western States region. We are licensed and bonded in all Western States, providing comprehensive construction services for retail, restaurant, veterinary/healthcare, and commercial customers.


Mailing address: 

1910 Bickford Ave Ste A

Snohomish, WA 98290


Physical Location:

1910 Bickford Ave, Suite A

Snohomish, WA 98290

Corstone has extensive experience with retail, restaurant, veterinary/healthcare, and commercial projects across the Western States region. Our experience spans occupied remodels, additions/upgrades, and new construction for numerous corporate clients, developers, franchisees and private owners. Our ability to constantly deliver projects on tight deadlines has been key to establishing long lasting relationships with repeat customers.

  • CFO/Owner Erin VerHoeven
  • CEO/Owner Mark Tapert

Dedicated to exceptional customer service and project value.

It's this commitment to providing a hassle-free construction process at a competitive price that acts as the "finishing touch" to your project.

  • Celebrating 17 years in business

Project Highlights

MOD Superfast Pizza

Corstone has completed several projects for MOD Superfast pizza, including stand-alone locations and TI build-outs in existing retail / mall locations. In all cases, Corstone has completed the projects on strict timelines. Our ability to work closely with the MOD staff and operations teams to ensure successful coordination of customer vendors during final construction has been key to these successful deliveries.


Woodhaven Veterinary Clinic

Corstone completed the Woodhaven Veterinary Clinic project in 2012. The new construction project consisted of 4,807 square feet of state-of-the-art veterinary technology and care. Built for Dr. Ann Brudvik and her staff, the clinic houses: 5 Exam Rooms (including one Consult/Exam room with an exterior door); Treatment Area; Surgery Room; Radiology; Pharamcy / Lab; Special Procedures Roomo; Cat Ward; Dog Ward; Lounge / Staff Kitchen and Doctor Offices. The uniquely shaped triangular building is located on busy Edmonds Way. Special features include a vaulted reception ceiling, curved radius reception counter, stained concrete floors and installation of some of the latest in treatement technologies. The project was completed on schedule and according to budget.

Employments benefits

  • Medical
  • Dental
  • 401k