By MBAKS Senior Policy Analyst Allison Butcher

At the end of the first quarter of 2018, King County is leading the way in building permit activity in the region, with single family permits up 19 percent and multifamily permits up 25 percent compared to the same period last year. Meanwhile, single-family permits have dropped 19 percent in Snohomish County and multifamily permits are down 58 percent year-over-year.  For the three-county region as a whole (King, Snohomish, and Pierce counties), permits are up 7 percent and 9 percent, respectively.

The Builders' Bulletin is intended to provide a convenient way to track housing in our market and includes information from the Northwest Multiple Listing Service, State of the Cities Data Systems, Office of Financial Management and the Washington State Employment Security Department.

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Contact: data@mbaks.com

Puget Sound Population Surge Led by Seattle, King County

As of April 1, 2025, the Puget Sound region reached a population of 4,534,300, growing by 50,400 people over the past year. This growth was led overwhelmingly by King County, which added 33,600 residents—accounting for two-thirds of the region's total increase. Seattle alone contributed nearly 19,000 new residents, surpassing 816,000 and outpacing the combined growth of Snohomish and Pierce counties. While Snohomish (+6,700) and Pierce (+7,300) counties saw steady, modest increases, growth in transit-connected suburbs like Shoreline and Redmond stood out. Kitsap County grew by 2,800, maintaining its trend of stable, moderate expansion. Overall, the region’s growth reflects continued urban and transit-oriented population shifts, even as statewide growth slows compared to previous years.

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USEPA photo by Eric Vance

LDC Inc. went to Washington, D.C. October 24 to advocate for sensible stormwater management regulations that lead to clean water for communities instead of mountains of paperwork.

Representing builders and developers who do business in Environmental Protection Agency Region 10, Clay White, principal planner, joined nine other NAHB members from across the country to meet EPA Administrator Scott Pruitt and his top local enforcement officials.

NAHB members suggested several ways EPA could improve the process, including:

• A simplified permit process for small lots. EPA's compliance template for single-family homes in large subdivisions that could also serve as a streamlined permit: it's concise and written in "builder language" because NAHB helped develop it.
• A "find it, fix it" approach. Rather than penalize first-time violators, EPA inspectors should provide compliance assistance during site visits and allow builders to correct minor infractions so they can do it right the next time.
• Better coordination among regulators. Multiple visits from local, state and federal inspectors to the same site can result in very different observations and citations. The EPA needs to allow the states, and not themselves, to play the lead role in stormwater enforcement.
• Continued participation in EPA's "Smart Sectors" Program. Homebuilders were invited to participate this business community partnership to develop sensible regulations while protecting the environment and public health.

White was pleased at EPA's response. "It was tremendous to meet with Administrator Pruitt and the EPA team on issues that are impacting our building community. I believe that this meeting will result in positive outcomes for the builders in our region."

For stormwater management resources, visit the NAHB Stormwater Toolkit.