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Sustainable building
Green building tools
Help for professional builders to reduce waste, save money, and recycle. Earn recognition for adopting green building practices.
Building decarbonization programs
Apply for funding to weatherize, replace oil and gas heating with high-efficiency heat pumps and make other clean energy improvements to homes, businesses, and community and government buildings. Includes various Energize and C-PACER loan programs.
Septic System Maintenance and Side Sewer Repair Rebate Program
Rebates for work to improve septic systems and side sewers for qualifying locations and/or incomes.
Transfer of development rights program
Buy and sell the rights to build homes in certain places to provide important public benefits like farms, forests, open spaces, trails, and lands for wildlife. By transferring the rights to build in one place to another, landowners can make money, and the public can keep these special areas protected forever.
Current use taxation programs
Apply for reduced taxes on your rural property in exchange for conserving natural resources.
Surface water management fee discounts and cost-sharing program
Reduce your SWM fee by applying sustainable building practices that reduce and cleanse your stormwater.
King County surface water design manual
Help for engineers to design storm drainage systems that cleanse stormwater and reduce flooding problems for downstream neighbors.
Construction Stormwater Pollution Prevention Standards
How to keep your construction site clean in northwest rains.
Stormwater pollution prevention
Look up best practices to apply on business and multifamily lands to help control stormwater pollution to avoid fouling lakes, streams and Puget Sound.
Flood Elevation Program
Provides help to raise homes above flood level to reduce risk of damage from flooding.
Wetland information
Learn about the importance of wetlands, find maps, development regulations and supportive programs.
Pacific Northwest native plants
Identify native plants, find out how to grow them and where to order native plants that are adapted to thrive in our area.
Featured news
February 13, 2026
Updated King County Critical Area Ordinance enhances protection for environmentally critical areas, supports housing, and commercial agriculture
January 20, 2026
King County Awards $23.7 Million to Eight Affordable Housing Developments, Creating 672 Homes Countywide
October 22, 2025
External article, MyNorthwest
King County approves ambitious climate action plan
October 21, 2025
External report, KING5 News
King County Council passes updated climate plan through 2030, sets goal for carbon neutrality by 2050
October 21, 2025
King County to begin implementing five-year plan for climate action
August 15, 2025
External article, Seattle Times
Solar panels that fit on your balcony or deck are gaining traction in the US
March 27, 2025
VIDEO: King County scientists identify a potential breakthrough for treating salmon-killing tire chemical
Research by King County's Water and Land Resources Division confirmed the effectiveness of soil mixture that treats 6PPDQ, a toxic chemical found in tire dust that causes coho salmon to die before they return to their spawning grounds.
Strategic Climate Action Plan
Plan to increase resilience to climate damage and reduce climate pollution in King County. Updated every five years.
Resource recovery
Local efforts to establish a sustainable, circular economy by turning waste into resources.