At ILGSE, we pride ourselves on a solid reputation for structural engineering design, consultation, personal attention and responsiveness, and have built our business on work from repeat clients. Considered one of the preeminent leaders of historic preservation in Seattle, our hands-on practical knowledge of the behavior of existing buildings has been learned from decades of experience. While historic restoration is an intrinsic niche for our firm, we also have long-standing relationships with clients at the top of their field in affordable housing as we proudly support their efforts to provide safe, innovative, and supported services that allow new beginnings for people in stable housing. ILGSE provides structural engineering services for a wide variety of structures. For all of our projects, our company offers innovative, practical, and cost-effective consultation from the initial schematic designs through the completion of the construction process. The nuanced approach we have developed through years of experience with both new and existing buildings allows us to bring a thoughtful approach and detailing to make buildings that serve both form and function. Our long-standing relationships with both contractors and design teams throughout the region has resulted in structural designs that are both creative and efficient, but always with an eye towards constructability.
| Website | http://www.ilgross.com |
| Revenue | $5 million |
| Employees | 8 (6 on RocketReach) |
| Founded | 1991 |
| Address | 23914 56th Ave W Suite 200, Mountlake Terrace, Washington 98043, US |
| Phone | (206) 623-0769 |
| Industry | Civil Engineering, Architecture, Engineering & Design, Architecture, Construction, Real Estate, Professional Services |
| Keywords | Structural Engineering Design, Structural Engineering Services, Historic Building Restoration, Building Code Compliance, Structural Analysis Services, Feasibility Studies, Structural Calculations, Structural Drawings, Structural Rehabilitation, Structural Plans, Construction Drawings, Structural Reports |
| Competitors | HNTB, Jacobs, AECOM, Arup, Kiewit, Stantec, Thornton Tomasetti, Gannett Fleming, Walter P Moore, COWI +31 more (view full list) |
| SIC | SIC Code 87 Companies, SIC Code 871 Companies |
| NAICS | NAICS Code 54 Companies, NAICS Code 54133 Companies, NAICS Code 541 Companies, NAICS Code 5413 Companies |
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The I.L. Gross Structural Engineers LLC annual revenue was $5 million in 2026.
6 people are employed at I.L. Gross Structural Engineers LLC.
I.L. Gross Structural Engineers LLC is based in Mountlake Terrace, Washington.
The NAICS codes for I.L. Gross Structural Engineers LLC are [54, 54133, 541, 5413].
The SIC codes for I.L. Gross Structural Engineers LLC are [87, 871].