King County · Seattle-Tacoma-Bellevue · population 6,787
Where Black Diamond stands
Population growing 9.6% per year.
Home value trajectory · last 10 years
Zillow ZHVI · monthlyLifestyle scores
Scores are heuristic estimates from population density, state, and known transit/walkable cities. Not based on a paid Walk Score / Transit Score API — see methodology for the formula.
Rent trajectory · last 5 years
Zillow ZORI · monthlyHome value vs rent · indexed to 100
Both rebased at first month of ZORI data (~2015)Rent vs buy
At a 24.6 price-to-rent ratio, the math is starting to lean toward renting in Black Diamond. Owner-occupier ROI requires longer holds and the assumption that prices keep appreciating roughly at the rate of rent.
How the momentum score breaks down
methodology →Black Diamond has held up across the cycle: home values at $783,218 with +4.5% 5-year CAGR. The bull case is structural — population, location, employer base — and holds even if next year's print is soft.
Black Diamond's bear case is the boring one: the cycle is real and any market that's run hard can stall. Watch for slowing population growth, rising days-on-market, or builder discounts as the early warning signals.
About Black Diamond
Black Diamond is a city in King County, Washington, with an estimated population of 6,787. It anchors the Seattle-Tacoma-Bellevue metro area. The population has grown 9.6% per year on average between 2020 and 2024 — among the faster-growing communities in the state. The median home value in Black Diamond is $783,218 as of 2026-04, down 2.0% over the last 12 months. Over the last five years, home values have averaged +4.5% annual growth (-2.5% from the 5-year peak). Rents in Black Diamond average $2,654 per month, roughly flat year-over-year (-0.0%). The composite momentum score is 63 of 100 (Rising). The market is healthy with prices supported by underlying demand.
▲ Bull case
▼ Bear case
Playbook
You're not in a frenzy but you're not getting bargains either. Make a competitive offer with normal inspection terms. Don't lowball — the listing will move with or without you.
Price at fair market value; expect movement in 30-45 days. Don't get clever with terms (rent-back, contingencies) — buyers in a Rising market have options.
Appreciation tailwind exists but cash flow requires discipline on price. Run the numbers conservatively and confirm rent comps before committing.
Local safety & alerts
No active National Weather Service alerts for King County right now.
Public-safety links are official .gov sources, not curated by us. King County routes NWS alerts; check the state EM portal for non-weather emergencies.
Cities like Black Diamond
Run the numbers for Black Diamond
Sources: Zillow ZHVI (home values), Zillow ZORI (rents), US Census ACS + place population. Updated when source agencies publish revisions.
Climate & natural-disaster risk
State-level averages from NOAA Climate Normals (1991-2020) and FEMA National Risk Index. City-level conditions can vary significantly within a state.
Local sports teams
Major professional teams the Seattle-Tacoma-Bellevue area cheers for. Detailed stats, schedules, and player pages on intherafters.com.
Current weather
Find rentals & listings
Open current Black Diamond listings on the major real-estate sites.
Links open the live search on the destination site — results are always current.
Local economy & environment
Humidity is annual average relative humidity (NOAA). Income is Census ACS 5-year estimate. Industries are largest employment sectors statewide (BLS); the local mix in a given city may vary.
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