House Prices

House Prices & Home Values Black Diamond, WA 2026


Average Data

average house price$702,754
average size per house2966 ft²
average price per ft²237 $ / ft²

04/05/2026 - The value range (VR) for house prices in Black Diamond, WA is $229/ sqft to $229/ sqft. An average home with 2966 sqft costs approximately $679,214 to $679,214. Black Diamond, WA includes 1 ZIP codes and it is located in King county. The lowest prices are found in ZIP 98010, while the highest are in ZIP 98010. The average price per sqare feet is $237. Our analysis is based on 11 property listings.

Avergage prices by ZIP codes Black Diamond

98010251 $ / ft²




Historical development of home values in Black Diamond

Year Estimated value (USD) Change vs. 2025
2010 $326,372 -53.6%
2011 $313,751 -55.4%
2012 $312,906 -55.5%
2013 $324,602 -53.8%
2014 $340,742 -51.5%
2015 $358,230 -49.0%
2016 $376,925 -46.4%
2017 $397,270 -43.5%
2018 $419,233 -40.3%
2019 $438,672 -37.6%
2020 $461,349 -34.4%
2021 $524,735 -25.3%
2022 $611,723 -13.0%
2023 $645,090 -8.2%
2024 $682,410 -2.9%
2025 $702,754 0.0%

Graph: estimated home values in Black Diamond over time (USD)



Example: 100% financing house in Black Diamond

Loan amount: $702,754

Interest rate: 6.00%

Fixed monthly payment: $4,213.37

Breakdown in the 1st month:
Interest portion: $3,513.77  –  Principal portion: $699.60

Yearly breakdown (100% financing)

Year Interest per year ($) Principal per year ($) Remaining balance at year-end ($)
1 $41,930.48 $8,629.90 $694,124.10
2 $41,398.21 $9,162.17 $684,961.92
3 $40,833.11 $9,727.28 $675,234.65
4 $40,233.15 $10,327.23 $664,907.41
5 $39,596.19 $10,964.20 $653,943.21
6 $38,919.94 $11,640.44 $642,302.77
7 $38,201.98 $12,358.40 $629,944.37
8 $37,439.74 $13,120.64 $616,823.73
9 $36,630.49 $13,929.89 $602,893.84
10 $35,771.33 $14,789.06 $588,104.78
11 $34,859.17 $15,701.21 $572,403.57
12 $33,890.75 $16,669.63 $555,733.93
13 $32,862.61 $17,697.78 $538,036.16
14 $31,771.05 $18,789.34 $519,246.82
15 $30,612.16 $19,948.22 $499,298.60
16 $29,381.80 $21,178.59 $478,120.01
17 $28,075.55 $22,484.83 $455,635.18
18 $26,688.73 $23,871.65 $431,763.53
19 $25,216.38 $25,344.00 $406,419.53
20 $23,653.22 $26,907.16 $379,512.36
21 $21,993.65 $28,566.74 $350,945.62
22 $20,231.71 $30,328.67 $320,616.95
23 $18,361.11 $32,199.28 $288,417.67
24 $16,375.12 $34,185.26 $254,232.41
25 $14,266.65 $36,293.73 $217,938.68
26 $12,028.13 $38,532.25 $179,406.43
27 $9,651.55 $40,908.83 $138,497.60
28 $7,128.38 $43,432.00 $95,065.60
29 $4,449.59 $46,110.79 $48,954.81
30 $1,605.58 $48,954.81 $0.00

Note: The calculation is based on a standard annuity mortgage with a fixed monthly payment over the entire term. Extra payments, interest rate changes, and additional purchase costs (e.g. taxes, notary fees) are not included.


How to sell in Black Diamond, WA


1500 sqft3900 sqft
Ø selling price$430,156$915,058
Ø fast selling$391,051$823,552
Ø high price sale$469,261$1,006,563

In 2026, houses in Black Diamond, WA will be offered at an average price of $237 per square foot. A 1,500 sqft home priced at $430,156 is 25.12% more expensive per square foot than a 3,900 sqft home priced at $915,058. Home prices in Black Diamond, WA vary significantly depending on the neighborhood and location. For a quick sale, a 2,700 sqft home should be listed at around $633,501. Sellers who can wait longer may achieve a higher price of up to $774,280.

FAQ – Home Values in Black Diamond

What is the median home value in Black Diamond in 2026?

In 2026, the typical home value in Black Diamond is about $702,754 for an average home size of 2966 square feet. This corresponds to an average price of roughly $237 per square foot.

What is the average cost per square foot in Black Diamond?

In 2026, homes in Black Diamond sell for an average of around $237 per square foot, with a typical range between $229 and $229 per square foot, depending on the property’s location, condition, and lot size.

What is the average home size in ?

The average home size in Black Diamond is about 2966 square feet, with an estimated 2026 value around $702,754.



Locations close to Black Diamond, WA

Bothell, WA197 $ / ft²
Carnation, WA236 $ / ft²
Duvall, WA350 $ / ft²
Bellevue, WA924 $ / ft²
Federal Way, WA265 $ / ft²
Auburn, WA230 $ / ft²
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