10 Minute Bids
Design criteria

What the San Juan Islands builds to.

The design numbers each jurisdiction publishes, the ones the trusses, bracing, roofing and plumbing on your plans are drawn to.

San Juan Islands: published design criteria
WhereSnow loadDesign wind speedSeismic design categoryFrost depthEnergy code climate zone
San Juan County (unincorporated: Orcas / Eastsound, Lopez, San Juan outside Friday Harbor, other islands)25 psf (as printed)110 mphD112 in4C
Friday Harbor25 psf (as printed)110 mphD112 in4C

Sources: San Juan County (unincorporated: Orcas / Eastsound, Lopez, San Juan outside Friday Harbor, other islands): San Juan County Community Development · Friday Harbor: Town of Friday Harbor. Read 2026-09-28. Climate zones: Washington State Energy Code, Table R301.1. Every number is as the jurisdiction publishes it (its design criteria for houses, IRC Table R301.2(1)); a dash means it isn't published. Your lot can differ with elevation and exposure, so confirm it with the building department before you order.

Where

San Juan Islands towns.

Friday Harbor, Eastsound, Lopez Island, Deer Harbor, Orcas Island. Next door: Whatcom County · Skagit County · Whidbey & Camano. Every area

Questions

Takeoffs in San Juan Islands

Do you do takeoffs for houses in Friday Harbor?

Yes: any house in the San Juan Islands (Friday Harbor, Eastsound, Lopez Island, Deer Harbor and Orcas Island), and anywhere else. You upload the plan set; nothing has to be built yet.

Which trades can I order?

Metal and shingle roofing, siding, framing, electrical, plumbing, exterior and interior painting, flooring and finish carpentry, one trade or the whole house, all measured off the same 3D model.

Does it cost more in San Juan Islands?

No. The price is the same everywhere and you see it before you pay. The 3D model is included, and each trade after the first in the same order is half price.