1. States
  2. /Washington
  3. /King County
  4. /Black Diamond
CSASeattle-TacomaMSASeattle-Tacoma-Bellevue#20/77 Income

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Showing latest year with year-over-year changes. Full permit history available with a paid plan. View plans →

Year

Insightsi

Construction activity in 2024 was down 19.3% from the prior year, with 96 housing units permitted.

  • •26% more units than the average King County town (76), suggesting faster-than-typical growth.
  • •Average unit valued at $346K — 32% above the King County average of $261K, indicating higher-end construction.
  • •All permits were for single-family homes — no multi-family construction.

Total Unitsi

96 ▼ 19.3%

2024

Total Valuei

$33.2M ▼ 22.5%

2024

Single-Familyi

100%

96 units

Multi-Familyi

0%

0 units

Black Diamond vs. Avg. King Co. Town (2024)i

Black DiamondAvg.Diff
Total Unitsi9676+26%
Total Valuei$33.2M$19.9M+67%
Single-Familyi9627+256%
Multi-Familyi049-100%
Buildingsi9630+220%
Value / Uniti$346K$261K+32%

Housing Units Permittedi

Solid line is Black Diamond; dashed line is King County average.

Construction Valuei

Solid line is Black Diamond; dashed line is King County average.

Census BPS