21820 312th Pl
Black Diamond, WA 98010
4 bd 4 ba 3,840 sqft Built 2018 Lot 32,387 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $743,000 | $618,000 | $1,361,000 | $14,203 |
| 2024 | $777,000 | $555,000 | $1,332,000 | $13,794 |
| 2023 | $980,000 | $349,000 | $1,329,000 | $14,876 |
| 2022 | $795,000 | $269,000 | $1,064,000 | $13,411 |
| 2021 | $598,000 | $269,000 | $867,000 | $11,733 |
| 2020 | $615,000 | $269,000 | $884,000 | $11,681 |
| 2019 | $591,000 | $260,000 | $851,000 | $10,766 |
Property facts
Year built
2018
Property type
single_family
Stories
2
Beds
4
Baths
4
Living area
3,840 sqft
Lot size
32,387 sqft
ZIP code
98010
City
Black Diamond
Street
312th Pl
Coordinates
47.32185, -122.05344
Comparable properties nearby
Frequently asked questions
When did 21820 312th Pl last sell?
No public-record sale is on file for 21820 312th Pl.
What is the current tax assessment for 21820 312th Pl?
The most recent total assessment for 21820 312th Pl (year 2025) is $1,361,000 with $14,203 in property tax.
When was 21820 312th Pl built?
21820 312th Pl was built in 2018.
How does 21820 312th Pl compare to others on 312th Pl?
We track 1 other property on 312th Pl. Browse the list under "Other properties on 312th Pl" to compare beds, baths, and sale history.
What are the property facts for 21820 312th Pl?
21820 312th Pl is a 4 bed, 4 bath, 3,840 sqft, 32,387 sqft lot single_family.
Is 21820 312th Pl a flip candidate?
No — 21820 312th Pl does not appear in our flips dataset.
Is 21820 312th Pl a tax-appeal candidate?
No — 21820 312th Pl is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-3.2%
Implied 1-yr
-12.6%
2026 Q3
$733.9K
2026 Q4
$704.8K
ZIP 98010 — Median Price History + Forecast
Explore nearby
Geography
Other properties on 312th Pl