Zoning, building permits and septic rules in Town of Steilacoom, Washington
Town of Steilacoom is a town in Pierce County, Washington. 3 rules below are quoted from official sources and independently re-checked, most recently on November 12, 2026. Rules for unincorporated land are on the Pierce County page.
Answers from the rulebook for Town of Steilacoom
Town of Steilacoom’s own rules
Building code adoptedAdopted (with conditions)
Building construction inside Steilacoom town
Codes are adopted as amended by the Washington State Building Code Council
Adopts the 2021 International Building Code including Appendix E, the 2021 International Existing Building Code and the International Swimming Pool and Spa Code
Document is a town-hosted copy of Title 15; its currency was not confirmed
“the town of steilacoom hereby adopts the following codes, as amended by the washington state building code council pursuant to rcw 19.27.074 for the purpose of establishing rules and regulations for the construction, alteration, removal, demolition, equipment, use and occupancy, location and maintenance of buildings and structures, including permits and penalties:”
Permit feesVariable (with conditions)
Building permit fees inside Steilacoom town
Amounts are in a fee schedule adopted by council resolution, which was not opened
Valuation uses the ICBO Building Standards valuation data table without regional modifiers
“permit fees shall be determined by the fee schedule adopted by the town of steilacoom by resolution of the town council.”
Permit processPartial
Building permit review inside Steilacoom town
Review checks compliance with chapter 15.04, chapter 2.14 SMC and Titles 16, 17 and 18 SMC
Historic district work needs review under chapter 2.14 SMC (SMC 15.04.110)
Complete-application requirements in SMC 15.04.080 were not quoted
“no building permit shall be issued until the plans have been approved by the building official.”
Still unanswered
We looked and could not find an official answer yet. Silence is not permission; ask Town of Steilacoom or Pierce County directly.
Building permit — Building permits inside Steilacoom town
Owner-builder exemption — Owner-builder exemption inside Steilacoom town
Inspections — Building inspections inside Steilacoom town
Certificate of occupancy — Certificate of occupancy inside Steilacoom town
Local zoning — Zoning inside Steilacoom town
22 more unanswered
Zoning districts
Minimum dwelling size
Minimum lot size
Setbacks
Lot coverage
Building height
Living in an RV
Camping on your land
Tiny homes
Manufactured homes
Accessory dwellings
Who permits septic
Septic permit
Septic inspection
Off-grid sanitation
Well permit
Mandatory utility hookup
Agricultural exemption
Subdividing land
Driveway access
Building in a floodplain
Short-term rentals
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Town of Steilacoom publishes no rule on the point, not that none exists. Pierce County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Town of Steilacoom means bringing your own water and power. The kit we’d start with: