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Most King County offices will be closed on Monday, February 19, for President's Day.  
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To serve, educate and protect our community by shaping and implementing King County's development and environmental regulations.


We are a national leader promoting responsible and sustainable development to foster environmental quality, economic vitality and social benefit.


Excellent service

We provide accessible and high-quality service to our community, customers and colleagues through accurate information and cost-effective and timely decisions.

Fairness and consistency

We apply regulations, policies and procedures in a predictable, clear and consistent manner for all citizens.


We treat our customers and colleagues with courtesy, professionalism and respect.


We actively seek to implement new ideas that support our vision and mission.


We work together. We establish clear objectives, respect differing views, and commit to cooperative problem-solving.


We strive to communicate effectively with our community, customers, and colleagues through listening, educating and sharing current information.

A good place to work

We value employee satisfaction within a diverse workforce. We promote employee development, responsibility, and accountability while providing necessary resources and a safe work environment. We take pride in the work we do.

Fiscal responsibility

We balance the costs of accomplishing our vision, mission and values with available resources and revenue.

Partnerships / Coordinate / Harmonize

We work with other regulatory agencies to coordinate overlapping regulations so they are seamless to citizens and other customers.

Technology & Science

Effective technology and science-based practices support the department's vision and mission.