1,211 of the 5,214 lots in Lake Tapps (23%) 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 3,953 lots are outside the urban growth area, where Pierce County's own ADU rules decide.
3,010 of the 5,214 lots in Lake Tapps (58%) have septic records on file with the Tacoma-Pierce County Health Department. 5,214 lots are inside a Pierce County sewer service area, and 0 are within 300 feet of a county sewer main.
Vacant land in Lake Tapps sold for a median of $214,663 per acre across 10 sales since October 1, 2023. Homes sold for a median of $904,128 across 513 sales. 457 new homes were permitted since October 1, 2021.
Of the 5,214 lots in Lake Tapps, 3,524 touch a mapped landslide hazard area, 1,845 an erosion hazard area, 903 a flood area and 939 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