WA Rev Code § 58.17.170 (2021)
2021 Revised Code of Washington|Title 58 - Boundaries and Plats|Chapter 58.17 - Plats—Subdivisions—Dedications.|58.17.170 - Written approval of subdivision—Original of final plat to be filed—Copies—Periods of validity, governance.

RCW 58.17.170 Written approval of subdivision—Original of final plat to be filed—Copies—Periods of validity, governance.(1) When the legislative body of the city, town, or county, or such other agency as authorized by RCW 58.17.100, finds that the subdivision proposed for final plat approval conforms to all terms of the preliminary plat approval, and that said subdivision meets the requirements of this chapter, other applicable state laws, and any local ordinances adopted under this chapter which were in effect at the time of preliminary plat approval, it shall suitably inscribe and execute its written approval on the face of the plat. The original of said final plat shall be filed for record with the county auditor. One reproducible copy shall be furnished to the city, town, or county engineer. One paper copy shall be filed with the county assessor. Paper copies shall be provided to such other agencies as may be required by ordinance.(2)(a) Except as provided by (b) of this subsection, any lots in a final plat filed for record shall be a valid land use notwithstanding any change in zoning laws for a period of seven years from the date of filing if the date of filing is on or before December 31, 2014, and for a period of five years from the date of filing if the date of filing is on or after January 1, 2015.(b) Any lots in a final plat filed for record shall be a valid land use notwithstanding any change in zoning laws for a period of ten years from the date of filing if the project is not subject to requirements adopted under chapter 90.58 RCW and the date of filing is on or before December 31, 2007.(3)(a) Except as provided by (b) of this subsection, a subdivision shall be governed by the terms of approval of the final plat, and the statutes, ordinances, and regulations in effect at the time of approval under RCW 58.17.150 (1) and (3) for a period of seven years after final plat approval if the date of final plat approval is on or before December 31, 2014, and for a period of five years after final plat approval if the date of final plat approval is on or after January 1, 2015, unless the legislative body finds that a change in conditions creates a serious threat to the public health or safety in the subdivision.(b) A subdivision shall be governed by the terms of approval of the final plat, and the statutes, ordinances, and regulations in effect at the time of approval under RCW 58.17.150 (1) and (3) for a period of ten years after final plat approval if the project is not subject to requirements adopted under chapter 90.58 RCW and the date of final plat approval is on or before December 31, 2007, unless the legislative body finds that a change in conditions creates a serious threat to the public health or safety in the subdivision.[ 2017 c 161 § 2; 2013 c 16 § 2; 2012 c 92 § 2; 2010 c 79 § 2; 1981 c 293 § 10; 1969 ex.s. c 271 § 17.]NOTES:Severability—1981 c 293: See note following RCW 58.17.010.