Vaughn, WA: ADUs, septic or sewer, land prices and hazard areas

Can I build an ADU in Vaughn, WA?

0 of the 986 lots in Vaughn (0%) are zoned for houses inside an urban growth area. On those lots, Washington's HB 1337 requires the city or county to allow at least two accessory dwelling units (ADUs). Another 946 lots are outside the urban growth area, where Pierce County's own ADU rules decide.

Septic or sewer in Vaughn, WA?

414 of the 986 lots in Vaughn (42%) have septic records on file with the Tacoma-Pierce County Health Department. 972 lots are inside a Pierce County sewer service area, and 0 are within 300 feet of a county sewer main.

Land prices in Vaughn, WA

Vacant land in Vaughn sold for a median of $43,060 per acre across 18 sales since October 1, 2023. Homes sold for a median of $605,000 across 37 sales. 84 new homes were permitted since October 1, 2021.

Landslide, flood and wetland areas in Vaughn, WA

Of the 986 lots in Vaughn, 896 touch a mapped landslide hazard area, 428 an erosion hazard area, 434 a flood area and 169 an inventoried wetland, on Pierce County's maps.

From the Pierce County Assessor-Treasurer, the county's zoning, sewer, hazard and growth-area maps, and the Tacoma-Pierce County Health Department. Records as of October 2, 2026.

How these numbers are worked out · Guides

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