Black Diamond, WA Housing Market 2026: Median Home Price, Last 12 Months
What homes actually sell for in Black Diamond: a median closing price of $752,085 across 258 closings Resideline tracked over the last 12 months, with the sample size and mix stated plainly.
If you invest in or around Black Diamond, the number that matters is what homes actually close for, not what sellers are asking. Here is what Black Diamond sale prices look like right now, built from the closings Resideline tracked over the last 12 months, as of September 2026.
The snapshot
- •Closings tracked, last 12 months: 258
- •Median sold price, last 12 months: $752,085
- •Median sold $/sqft, last 12 months: $366
What the numbers say
Resideline tracked 258 closed sales in Black Diamond over the last 12 months, with a median closing price of $752,085. That median is the midpoint of what buyers actually paid, not what sellers hoped to get, which is why it moves differently from the asking prices you see on listing sites. These are the closings Resideline tracks and may differ from complete county or municipal records. 87% of the Black Diamond closings we track here are single-family houses, so these figures primarily reflect that segment, and the citywide $/sqft figure primarily reflects that segment as well. Across the 258 closings with usable living area, the middle half sold between $305 and $484 per square foot.
Figures last updated September 6, 2026 from closings Resideline tracked.
Median home price in Black Diamond, WA (September 2026)
The median home price in Black Diamond is $752,085, measured across the 258 closed sales Resideline tracked over the last 12 months.
How long a sale takes here
- •Listed to under contract: a median of 21 days, across 120 Black Diamond closings Resideline tracked in the last 12 months
- •Contract to closing: a median of 35 days, across 168 Black Diamond closings Resideline tracked in the last 12 months
From market read to offer price
A market read is the backdrop. The decision still comes down to one property and one number: what it is actually worth and what you should pay. Every Resideline report opens with this same market snapshot for the subject's exact ZIP code, then gives you the property's value, the sold comps behind it, and a market rent estimate. Pricing a specific deal? The free ARV calculator and rental property calculator run the numbers in about a minute.
And we show our work. Every estimate is frozen while the home is for sale and graded against the real closing price after it sells. See the live accuracy dashboard for the receipts, or read how the Area Market Snapshot works.
Run any Black Diamond address through Resideline and you will see the local market and the property's value together, in one report.
Cite this
Using these numbers? Please cite the source and the sample size:
Source: Resideline Market Watch
Market: Black Diamond, WA
Geography: incorporated municipality, Census place 5306330
Data updated: September 2026
Analysis period: last 12 months
Tracked closings: 258
Median sold price: $752,085
Median sold $/sqft: $366 (258 qualifying)
Property mix: 87% houses
https://resideline.com/blog/black-diamond-wa-housing-market
Writing about this market? Paste this into your post:
<a href="https://resideline.com/blog/black-diamond-wa-housing-market">
<img src="https://resideline.com/images/embed/black-diamond-wa.png" alt="Black Diamond, WA home sale price distribution, last 12 months" width="1000" style="max-width:100%;height:auto">
</a>
<p>Source: <a href="https://resideline.com/blog/black-diamond-wa-housing-market">Resideline Market Watch</a></p>
The local market statistics in this report are calculated from closed sales tracked by Resideline. Transaction coverage may differ from complete county or municipal records.
Every local market figure on this page is computed from closed sales Resideline tracked in Black Diamond over the last 12 months, and is refreshed when the data is. The closings we track within the Black Diamond city limits are not limited to listing-service sales: they also include foreclosure deeds, estate and family transfers, and other off-market sales that portal medians exclude, which is why 10% of the 258 closings in this window never appeared on a listing service, and the median of MLS-listed sales alone was $749,950.
Frequently Asked Questions
What is the median home price in Black Diamond?
The median sold price in Black Diamond over the last 12 months is $752,085, measured across 258 closings Resideline tracked.
What is the typical price per square foot in Black Diamond?
Among qualifying Black Diamond closings Resideline tracked over the last 12 months, the median sold price per square foot was $366, measured across 258 sales with usable living area. Median is used rather than average because outliers distort the mean.
Ready to Start Investing Smarter?
Join 2,000+ investors using Resideline.
3 free reports at signup. No card required.