HB 1818
In CommitteeHouse
Administration of plats
Concerning the administration of plats.
This status may be delayed. See Action History below for the latest updates.
How does a bill become law?
- Introduced: The bill is filed and assigned a number.
- Committee: A subject-matter committee holds hearings, takes public testimony, and decides whether to advance the bill.
- Floor Vote: The full chamber (House or Senate) debates and votes on the bill.
- Opposite Chamber: The bill repeats the committee and floor vote process in the other chamber.
- Governor: The Governor reviews the bill and decides whether to sign or veto it.
- Signed: The bill has been signed into law.
AI Analysis
This bill modernizes Washington’s land subdivision laws by replacing the outdated distinction between short plats and subdivisions with a uniform administrative process for dividing land. It introduces a new 'administrative lot split' option for residential properties and streamlines review timelines, public notice, and approval procedures to reduce delays and inconsistency across local jurisdictions.
- Replaces the distinction between 'short plats' and 'subdivisions' with a unified administrative process for dividing land into two or more lots, effective for applications submitted on or after July 1, 2026.
- Introduces a new 'administrative lot split' allowing property owners to split a single-family residential lot into up to two lots without public hearings, provided certain conditions (e.g., minimum lot size, utility availability, access rights) are met.
- Expands and clarifies the 'binding site plan' process for commercial, industrial, and mixed-use developments, allowing administrative approval and easier lot creation under local ordinances.
- Requires cities subject to growth management act density requirements (RCW 36.70A.635) to adopt ordinances allowing administrative lot splits by July 1, 2026, and preempts conflicting local rules.
- Mandates administrative (non-hearing) review for all plat applications submitted on or after July 1, 2026, with strict timelines for review and decision, and limits public hearings to cases outside urban growth areas.
- Repeals outdated statutes (e.g., RCW 58.17.030, .060, .090, .092, .275, .330) and updates definitions, approval procedures, and recording requirements to align with current land use laws.
Who is affected
- Residential property owners — Property owners who want to divide their land into fewer lots (e.g., for sale, lease, or inheritance) will benefit from a simplified process, especially under the new 'administrative lot split' option that allows splitting a single-family lot into two lots without public hearings or complex approval processes.
- Commercial and industrial developers — Developers and landowners seeking to subdivide commercial, industrial, or mixed-use property may use the updated 'binding site plan' process, which allows for administrative approval and more flexible lot creation under local ordinances.
- City, town, and county governments — Local governments must update their ordinances by June 30, 2026, to comply with the new uniform standards, and may need to hire or assign staff to handle administrative plat reviews instead of relying on public hearings.
- Homebuyers and property buyers — Homebuyers and future property buyers benefit from clearer, faster approval processes and more consistent standards, reducing uncertainty and potential delays in property transfers.
- Utility and infrastructure providers — Utility providers (water, sewer, electric, wireless) and irrigation districts must respond to notices and provide input during plat review, and may be required to provide infrastructure rights-of-way or confirm service availability.
Pro/Con Analysis
Potential Benefits (5)
The administrative lot split—especially for cities subject to RCW 36.70A.635—creates a streamlined, non-hearing path to create additional residential lots, directly increasing housing density and supply in single-family zones, which are historically restrictive and contribute to racial and economic segregation.
HousingPeopleRef: Sec. 37(1), (2), (3)Allowing further segregation of middle housing units (e.g., duplexes, townhomes) via unit lot subdivision after an administrative split enables more flexible, market-responsive middle housing production—benefiting first-time buyers and renters seeking affordable options.
HousingPeopleRef: Sec. 37(2)(b)(i), (2)(b)(ii)Prohibiting cities from reducing the total allowable dwelling units on split lots preserves the underlying zoning’s density potential, preventing local governments from using lot-split approvals as leverage to impose lower-density outcomes—protecting equity in housing opportunity.
HousingPeopleRef: Sec. 37(4)Allowing conditional dedication of right-of-way and frontage improvements—rather than requiring full upfront costs—reduces upfront financial barriers for owners seeking to split, especially where infrastructure costs would otherwise exceed the property’s equity.
HousingLean peopleRef: Sec. 37(3)(d)Standardizing plat review timelines and eliminating discretionary public hearings for most applications reduces administrative burden and litigation risk for local governments—though this benefit is offset by the need to adopt new ordinances and hire staff, the net effect is faster, more predictable processing for all parties.
Local GovernmentLean peopleRef: Sec. 2, Sec. 9(7), Sec. 38
Potential Concerns (5)
The administrative lot split provision may increase housing supply by enabling more infill and middle housing, especially in cities subject to growth management density mandates, but its narrow scope—limited to single-family zones and excluding commercial/industrial zones—limits broader impact on housing availability.
HousingPeopleRef: Sec. 37(2)(a), (3)(c)The requirement that both resulting lots meet minimum lot size under RCW 36.70A.635 may prevent lot splits in areas where minimum lot sizes exceed 5,000–10,000 sq ft—effectively excluding lower- and middle-income homeowners who own smaller lots (e.g., in older urban neighborhoods) from qualifying for the administrative split.
HousingPeopleRef: Sec. 37(2)(a), (3)(a)-(d)Mandating water/sewer availability certificates before approval may delay or block splits in areas where utility infrastructure is aging or underserved—disproportionately affecting lower-income neighborhoods where utilities are less developed.
HousingLean peopleRef: Sec. 37(3)(b)Requiring access rights be granted or conveyed before approval may impose hidden costs on property owners—especially those without equity or access to financing—who must secure easements or pay for road improvements before splitting, potentially deterring low- and middle-income owners.
HousingLean peopleRef: Sec. 37(3)(c)Denying administrative lot splits where critical areas (e.g., floodplains, wetlands) exist may prevent redevelopment in areas where lower-income households are more likely to reside—often in less desirable, hazard-prone zones due to lower land values—reducing housing options for vulnerable populations.
HousingPeopleRef: Sec. 37(5)
Who Is Most Affected
Homeowners in cities subject to RCW 36.70A.635 (e.g., Seattle, Bellevue, Tacoma) with single-family lots in zones allowing up to two units may now split their property administratively, increasing housing supply and potential inheritance options—especially beneficial for aging owners seeking to downsize or share equity with adult children.
Lower- and middle-income homeowners in older urban neighborhoods may be unable to qualify due to minimum lot size requirements or lack of utility access—potentially excluding those in historically redlined areas where parcels are smaller and infrastructure is strained.
Developers and builders may benefit indirectly from increased lot supply in single-family zones, enabling more middle housing projects—but the bill’s restriction to administrative splits (no public hearings) and exclusion of commercial/industrial zones limits direct commercial impact.
Local governments must adopt new ordinances by June 30, 2026, and shift from hearing-based to administrative review—requiring staff reassignment and training, but reducing litigation exposure and speeding approvals, especially in cities already implementing housing policies.
Utility providers must respond to split applications and issue availability certificates—adding administrative work, but also enabling more predictable infrastructure planning as lot splits become standardized and transparent.