SEATTLE, WA – June 25, 2026 – PRESSADVANTAGE –
Alki Deck Builders, a deck, dock, and outdoor living contractor based in West Seattle, has reached its tenth year in business and now offers geotechnical and Environmentally Critical Area (ECA) permitting as a standalone service for other contractors. The company developed the service around the permitting categories that Seattle’s terrain routinely demands, an area of the trade that many builders avoid.
Steep slopes, peat zones, landslide-prone areas, shoreline environments, and ECA designations cover a meaningful share of Seattle’s residential lots. Over the past decade, Alki Deck Builders has handled Geotech Report submissions, ECA project applications, liquefaction zone documentation, steep slope analyses, peat element zone reviews, landslide-prone area filings, and shoreline environment approvals. Because the permitting team works through these requirements regularly, it can identify the soil reports a project will need and the foundation system likely to pass inspection before construction begins. Helical piles, traditional concrete footings, and pin piles are each used depending on the geotechnical findings for a given site.
“Most of the lots the company takes on come with a steep slope, a shoreline, or an ECA designation, and that is where the expertise was built over the past ten years,” said Luke Triemstra, owner of Alki Deck Builders.
Decks remain the company’s core work. Alki Deck Builders constructs residential and commercial decks across platform, raised, multi-level, freestanding, rooftop, pool and spa, curved, cantilevered, screened, and covered styles, and also handles rebuilds, resurfacing, remodeling, and inspections. Each project moves through design consultation, 3D modeling, foundation installation, permit acquisition, and framing completed by the company’s own team, with design consultations offered virtually so a project can begin without an initial site visit.
Dock construction forms the company’s second specialization, a less common pairing in the regional deck market. The company builds and repairs stationary, suspended, piling, and custom residential docks in wood, tropical hardwood, composite, and PVC, covering design, construction, framing, and structural and piling repairs. For homeowners on Lake Washington, Lake Union, or the Elliott Bay shoreline, the combined capability allows a single contractor to handle both the deck and the adjoining dock rather than coordinating a separate marine builder.
Material selection reflects the wet Pacific Northwest climate. The company works in pressure-treated wood, cedar and Douglas fir, exotic hardwoods such as Ipe and Cumaru, composite, and PVC, with decking supported by TimberTech by Azek, Deckorators, Bison, Kebony, and Thermory. Kebony and Thermory are modified wood products engineered for wet climates without the upkeep of traditional hardwood. Underdeck drainage systems, custom-fabricated railings, integrated lighting, and privacy screening are available as part of a finished deck, and framing systems use wood, steel, aluminum, and pressure-treated LVL.
Beyond decks and docks, Alki Deck Builders builds attached, freestanding, and louvered pergolas, including motorized and fixed louvered models, along with patios, covered porches, saunas, outdoor kitchens, firepits, and built-in seating that extend a deck into a wider outdoor living space.
The company holds TimberTech Platinum certification and Deckorators Certified Elite status. Workmanship coverage is structured by frame type, with a seven-year workmanship warranty on steel frame decks and a two-year workmanship warranty on wood frame decks, alongside the standard TimberTech and Deckorators material warranties that apply to the products specified on each project.
About Alki Deck Builders: Alki Deck Builders is a deck, dock, and outdoor living contractor based in Seattle, Washington, owned by Luke Triemstra. The company specializes in custom residential and commercial decks and residential docks, supported by pergolas, patios, porches, saunas, and the geotechnical and ECA permitting work that Seattle’s terrain requires, serving Seattle and the surrounding Puget Sound region from 5220 37th Ave SW, Seattle, WA 98126. More information is available at the company’s website.
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For more information about Alki Deck Builders, contact the company here:
Alki Deck Builders
Luke Triemstra
+14256007664
luke@alkidecks.com
5220 37th Ave SW, Seattle, WA 98126, United States
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