Specialty Contractors

Haskell Corporation

Heavy industrial/commercial, process/manufacturing construction; steel/pipe fabrication-ASME-Direct Hire capabilities in all disciplines. AGC member since 1991.
Phone: (360) 734-1200
Fax: (360) 734-5538
Street Address
1001 Meador Ave.
Bellingham, WA  98229
Mailing Address
P.O. Box 917
Bellingham, WA  98227

Hawk Mechanical Contractors, Inc.

Mechanical contracting - commercial/public works/industrial. AGC member since 2009.
Phone: (360) 794-8783
Fax: (360) 805-9321
Street Address
17220 W. Main St.
Monroe, WA  98272
Mailing Address
P.O. Box 547
Monroe, WA  98272

Hayward Baker Inc.

Our experience in design and construction of geotechnical construction services spans more than six decades. The Hayward Baker suite of techniques, equipment, and experience is comprehensive and is packaged to create the most effective and economical solution. AGC member since 2017.
Phone: (206) 223-1732
Fax: (206) 223-1733
Mailing Address
11180 E Marginal Way S
Tukwila, WA  98168

Henderson Partners, LLC

Excavation and utilities, framing and concrete, septic and sewers. AGC member since 2006.
Phone: (253) 851-5896
Fax: (253) 851-5826
11302 Burnham Dr. NW
Gig Harbor, WA  98332

Herzog Industries, LLC dba Herzog Glass

Everything in glass and metal. AGC member since 2017.
Phone: (206) 322-8444
Fax: (206) 322-9202
Mailing Address
4344 S 104th Pl.
Seattle, WA  98178

Holmberg Company Mechanical Contractors

Mechanical contractor, plumbing systems. AGC member since 1984.
Phone: (425) 822-2233
Fax: (425) 827-5735
15400 SE 30th Pl, Ste. 100
Bellevue, WA  98007

Holmes Mechanical Inc.

Industrial mechanical contractor. AGC member since 2016.


Phone: (360) 698-1977
Fax: (360) 698-1843
10890 Old Frontier Rd. NW
Silverdale, WA  98383

Hudson Bay Insulation Co.

Insulation of mechanical piping, ductwork, equipment, acoustical insulation, and fire stopping. Distributor of pre-insulated pipe supports. AGC member since 1988.
Phone: (206) 763-9484
Fax: (206) 763-7922
Street Address
210 S Hudson St., Ste. 375
Seattle, WA  98134
Mailing Address
P.O. Box 80424
Seattle, WA  98108
Luke Buoy
Spokane Office
Michael Clarno
Portland Office
Greg Zevely
Seattle Office
12225 NE Marx St.
Portland, OR  97230
Phone: (503) 688-1496
11616 E Montgomery
Spokane Valley, WA  99206
Phone: (509) 891-7110

Hughes Group LLC

The Hughes Group LLC provides professional services and installation support and specializes in logistics, custodial services, supplies, informational management systems and aircraft/airfield support operations. Additionally, Hughes groups provides traffic control services, striping and seal coating services as well as utility adjustment. AGC member since 2018.


Phone: (253) 588-2626
Fax: (253) 592-6127
Mailing Address
3701 S Lawrence Street
Tacoma, WA  98409