21203 Monument Rd SW is a 950 square foot house on a 5.16 acre lot with 1 bedroom and 1 bathroom. - it last sold on May 15, 1995 for $55,000. Based on Redfin's Vashon data, we estimate the home's value is $631,531.
Single-familyProperty Type
2011Year Built
5.16 acresLot Size
$665Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$631,531
$577K since sold in May 1995$59K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 20% lower than the average sale price ($790K) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Jul 3, 2012 • Final
Building mechanical residential
Install a wood stove in a residential building.
Electrical
HVAC
Jul 3, 2012 • Final
Building historical
Install a temporary mobile home for use during the construction of a single-family home.
ADU
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Bathroom Information
# of Full Baths: 1
Heating & Cooling
Heating Type: Baseboard Electric
Exterior
Exterior Information
Physical Condition: Average
Building Construction Quality: Fair
Building Type: Single Family
Property Information
Living Sq. Ft: 950
Ground Floor Sq. Ft: 950
Building Sq. Ft: 950
# of Stories: 1
Legal Description: N 1/2 OF NE 1/4 OF SE 1/4 OF NW 1/4 PLAT BLOCK: PLAT LOT:
Lot Information
# of Buildings: 1
Land Sq. Ft: 224,769
Municipality Name: KING COUNTY
Acres: 5.16
Zoning Code: RA5SO
County Use Description: SINGLE FAMILY(RES USE/ZONE)
Utility Information
Sewer Type: Private
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 1
Baths: 1.0
Sq. Ft.: 950
Stories: 1.0
Lot Size: 5.16 acres
Style: Single Family Residential
Year Built: 2011
Year Renovated: —
County: King County
APN: 082203 9031
Home facts updated by county records on Sep 5, 2026
Around this home
Schools
Chautauqua Elementary School
Public PreK-5 • Assigned • 0.9mi
8/10
Mcmurray Middle School
Public 6-8 • Assigned • 1.0mi
8/10
Vashon Island High School
Public 9-12 • Assigned • 0.7mi
9/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
2/10 Heat Factor
7 days above 87° expected this year, 15 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
6/10 Air Factor
8 unhealthy days expected this year, 9 days in 30 years
Provided by First Street
Historical weather
Vashon, WA • 98070
Average low and high temperatures (°F)
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77
55
76
58
70
54
59
47
51
43
48
41
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Sun exposure
In this area, properties receive around 8.8 hours in
June and 1.7 hours in December, placing it below the
U.S. average for solar exposure.
8.8 hrs
1.7 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$600,000 – $727,000
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