Black Diamond WA
339 active listings out of 5.4K total properties we track across 14 Black Diamond ZIPs — listings, off-market homes, rentals, and full sales/tax history. Refreshed nightly.
Download Black Diamond, WA property data
3,288,578 property records for all of Washington — address, beds/baths, sqft, year built, status, list and last-sale price, price and tax history. Parquet or CSV.
Files are published by ZIP, county and state; this city is inside the state file.
Monthly snapshot · 325.0 MB Parquet · CSV (584.2 MB)
Records keep changing after a snapshot is compiled.
Rebuilt every day · same columns, same file layout
While you're here, take in the bigger picture — maps below show Seattle metro, not just Black Diamond. Same company, same dataset, different resolution.
Inventory breakdown
Distribution of the 339 currently-active listings in Black Diamond, WA. Full dataset covers 5.4K properties — listings, off-market homes, rentals, and full history.
ZIP codes in Black Diamond
Drill into any ZIP for hex-level breakdowns.
Nearby cities
Other Washington cities within driving distance.
Get Black Diamond, WA data in your app
GET https://api.straply.com/v1/markets/city/black-diamond-wa
Authorization: Bearer $STRAPLY_KEY{
"city": "black-diamond-wa",
"total_tracked": 5408,
"active": 339,
"median_list": 699950
}Black Diamond, WA real estate: market summary
As of November 2026, Straply tracks 5,408 homes in Black Diamond, WA, with 339 active for sale at a median list price of $699,950 (~$316/sq ft). Notably, the market is cooling — the median sale price is down 24% year over year.
- Median list price
- $699,950
- Median $/sq ft
- $316
- Active listings
- 339
- Median sale price
- $695,000 (-24% YoY)
- Properties tracked
- 5,408
Frequently asked: Black Diamond, WA real estate
What is the median home price in Black Diamond?
The median list price in Black Diamond, WA is $699,950 (about $316 per square foot), based on 339 active listings tracked by Straply as of November 2026.
What price range are homes in Black Diamond?
Active listings in Black Diamond, WA concentrate in: 36% $500k–$750k and 29% $750k–$1m.
Are home prices in Black Diamond going up or down?
The median sale price is $695,000, down 24% year over year. Straply tracked 241 sales here over the past 12 months.
How many homes are for sale in Black Diamond?
Straply is tracking 339 active listings in Black Diamond, WA out of 5,408 properties on record as of November 2026.
How old are the homes in Black Diamond?
Most homes in Black Diamond, WA were built in the 2020s. About 83% were built after 1980, while 6% predate 1940. The newest tracked home dates to 2026.
What types of homes are in Black Diamond?
Black Diamond, WA is mostly single-family homes (70% of listings). Also common: townhouses 25%.
How many bedrooms do homes in Black Diamond typically have?
The most common size in Black Diamond, WA is 2 bd.
What are the most active ZIP codes in Black Diamond?
The ZIP codes with the most active listings in Black Diamond, WA are 98010, 98051.
What areas are near Black Diamond?
Nearby markets Straply also tracks include North Bend, Maple Valley, Ravensdale, Covington.
Data as of November 2026. Source: Straply. For address-level history and programmatic access, use the Straply API.