
Adding on is often the best way to get more room without moving: a primary suite, a bigger kitchen, a second story on a rambler. Every addition ties new work to a house built under an older code. That is the part we design. Licensed Washington PEs, stamped drawings and calcs for permit. Need drawings and the permit run? Build Sherpas handles plans and permits.
Bump-outs and ground-level additions, second stories, garage additions and conversions, and big remodels with moved walls, vaulted ceilings and new roof lines.
The existing house, new shear walls and hold-downs, new footings beside old ones, and roof tie-ins with snow load on the combined roof.
Send plans or photos. Defined additions get a clear fixed price. Code, red-tag and open-ended work starts with a short hourly agreement.



Call (253) 319-3220 or use Contact Us. Send plans or photos. Defined projects get a clear fixed price; code and open-ended work starts with a short hourly agreement.
Dow Engineering PLLC
16202 64th St E Ste 117, Sumner, WA 98390
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Our family: Build Sherpas, WA Blower Door, MI Elements. Same office in Sumner.
Part of the Dow Engineering family, Sumner, WA