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Sustainable building
If you are a Duvall area resident with natural gas heating, you may be eligible for a free heat pump and other home upgrades.
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
August 30, 2026
External article, Seattle Times
How Seattle light rail became world’s first floating passenger train
August 27, 2026
Executive Zahilay opens modern recycling and transfer station to serve South King County, contributing to cleaner, safer, healthier communities while improving the natural environment
King County’s new South County Recycling and Transfer Station makes it more convenient for residents in South King County to recycle and dispose of hazardous waste while protecting local water quality and improving the natural environment in Algona, Auburn, and Federal Way.
May 30, 2026
External article, Seattle Times
Mass timber is faster, cleaner, cheaper way to build housing in Seattle
April 21, 2026
VIDEO: King County is working with communities to promote forest canopy in urban unincorporated areas
The Department of Natural Resources and Parks’ new Urban Forestry Program is conducting a study that will prioritize forest enhancement projects in unincorporated communities, building on decades of progress for rural forests.
March 28, 2026
External article, Seattle Times
Seattle light rail finally opens across Lake Washington
February 13, 2026
Updated King County Critical Area Ordinance enhances protection for environmentally critical areas, supports housing, and commercial agriculture
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.