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Sustainable building
King County offers rebates for qualifying septic system and side sewer work based on income and/or location.
Green building tools
Help for professional builders to reduce waste, save money, and recycle. Earn recognition for adopting green building practices.
Energize! Heat Pump Program
Free and reduced cost heat pumps for residents in urban unincorporated King County areas of North Highline (White Center) and Skyway/West Hill.
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.
King County C-PACER Program
Property assessed financing mechanism to help commercial, industrial, agricultural and multifamily buildings become more efficient and resilient.
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
Nov. 25, 2024
External article, Seattle Times
Bomb cyclone shows cracks in WA’s electrical grid
Nov. 22, 2024
External report, KUOW
Climate pollution surges in Washington state after pandemic lull
Oct. 25, 2024
External report, KING5 News
Sound Transit approves route for West Seattle light rail extension
Oct. 25, 2024
External article, Vashon-Maury Island Beachcomber
Approaches to keeping Vashon housing affordable
Oct. 23, 2024
External article, Puget Sound Business Journal
Seattle area's office vacancy rate hits record high
Oct. 22, 2024
External article, Seattle Magazine
Report: Seattle’s Vacant Offices Could Become Shared Living Spaces
Apr. 23, 2024
King County highlights growing zero-emission fleet, announces $6 million EV charging grant
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.