SB 5552 aims to create a new category of building codes specifically for "kit homes" to increase affordable housing options. The bill defines kit homes as residential structures 800 square feet or smaller, built from prefabricated walls, floors, and roofs assembled on-site. It directs the State Building Code Council to establish these specific building codes for kit homes by December 31, 2025. This initiative is intended to provide more affordable small homes for homebuyers of modest means.
HB 2650 creates a tax deferral program for property owners developing affordable housing on underdeveloped land (like surface parking lots) in qualifying cities. It requires owners to complete construction within three years, offer housing to low/moderate-income households (costing ≤30% of income), and submit verification to cities within 30 days of a certificate of occupancy. Cities must then confirm compliance with affordability and construction standards before the Department of Revenue finalizes the sales/use tax deferral. The bill directly affects property developers, local cities administering the program, and the Department of Revenue. If requirements aren’t met, cities can deny the deferral or require interest on nonqualifying taxes.
HB 1717 creates a local sales and use tax remittance program for affordable housing projects in Washington. It allows cities and counties to adopt programs where developers of qualifying projects (with at least 50% units for low-income households at 30-38% of income for 40 years) can defer paying local sales taxes on construction costs. Developers must apply to local governments, meet affordability requirements, and complete projects within three years (extendable to five total), with local authorities setting application rules and oversight. The program directly affects nonprofit and for-profit housing developers, public housing authorities, and low-income households in qualifying projects.
HB 2269 allows counties to permit "middle housing" (like duplexes or small apartment buildings) on properties currently zoned for single-family homes in two specific areas: limited intensive rural development zones and designated urban growth areas. It requires counties to limit these projects to four units per lot and apply the same development standards (like setbacks and environmental rules) as single-family homes, without adding extra restrictions. The bill also mandates that middle housing in rural areas use public sewers or large on-site systems, while urban areas must have public water and sewer service. This policy directly affects property owners and developers in unincorporated Washington counties seeking to build more housing options.
HB 2228 requires Washington's state building code council to form a technical advisory group to recommend changes allowing "scissor stairs" (interlocking stairways with separate exits) in multi-unit residential buildings with more than two permanent dwelling units. The group must consider public safety, health, and construction costs in its recommendations, which must be ready for the 2027 building code update. This bill directly affects builders and developers of apartment-style housing, aiming to potentially simplify stairwell designs in such buildings. The advisory process expires on January 1, 2031, with no immediate code changes enacted.
HB 2304 expands the types of condominium buildings eligible for an express warranty of quality and insurance coverage, directly affecting developers of small residential projects. The bill allows developers to opt out of standard implied quality guarantees (like structural defects) if they provide an express warranty covering defects for specific periods: 1 year for workmanship, 2 years for systems (plumbing/electrical), and 10 years for structural elements. This applies to new or converted buildings with 12 or fewer units, including accessory dwelling units and structures under four stories (with specific configurations like parking or commercial space). Purchasers and future owners gain recourse through this warranty, while developers avoid implied warranty liabilities when meeting the coverage requirements. The change aims to streamline development for smaller condo projects without altering core buyer protections.
HB 1859 allows Washington religious organizations to develop affordable housing on their properties with increased density allowances. To qualify, at least 50% of units must be permanently affordable for low-income households (earning at or below 80% of local median income) for 50 years, with no discrimination based on protected characteristics. Religious organizations must cover all development fees and costs, and local governments must approve such projects if requested. This applies to new construction and rehab projects on religiously owned land, amending zoning laws to support affordable housing expansion.
SB 5587 mandates that the Washington center for real estate research produce biennial reports, starting in 2026, analyzing existing housing units and needs across various income levels in each county. These reports will track each county's progress in addressing housing gaps and meeting emergency housing needs. The bill also amends the Public Works Board's criteria for financial assistance. It requires the board to prioritize public works projects that promote infill development or increase affordable housing in counties identified in these reports as having a gap between existing housing and housing needs.
Senate Bill 5471 authorizes counties to permit "middle housing" in specific unincorporated areas, including designated urban growth areas and certain limited rural development areas. This allows for up to four residential units on parcels typically zoned for single-family homes. Counties implementing this must ensure middle housing development standards are no more restrictive than those for single-family residences, while still allowing objective standards like setbacks to apply. All such housing must be served by appropriate water and sewer services, and county actions to implement these provisions are exempt from certain administrative and judicial appeals.
HB 1096 requires certain Washington cities, those with minimum density requirements under the Growth Management Act, to establish an administrative process for splitting residential lots. This process allows an existing residential lot to be divided into two, facilitating the creation of new middle housing or single-family homes, often with simultaneous review of a building permit. The lot split can be approved administratively by a planning director, without a public hearing, if specific conditions are met regarding lot size, utilities, and access. The bill aims to increase housing options for homeowners and prospective buyers, with the Department of Commerce providing guidance and grants to cities for implementation.