421 9th St is a 1,837 square foot house on a 8,000 square foot lot with 3 bedrooms and 2 bathrooms. - it last sold on June 01, 1973 for $52,500. Based on Redfin's Del Mar data, we estimate the home's value is $2,972,764.
Single-familyProperty Type
1953Year Built
8,000 sq ftLot Size
$1,618Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$2,972,764
$2.9M since sold in June 1973$208K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 20.7% higher than the average sale price ($2.46M) of 5 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
R1-10
Low Density Residential Zone
The R1-10 Zone is designed to provide for an area of one-family residential development at a density level consistent with the City Community Plan. The standards of the zone are intended to preserve an open and uncrowded character and protect the unique residential environment of Del Mar. The standards are intended to promote and protect those special amenities associated with a district of single-family homes. Factors of topography and environmental sensitivities, the character of existing, low-density residential areas, and the need to identify Del Mar as a distinct and separate community shall be taken into account in administering the standards contained herein.
Permitted uses
Include but are not limited to:
Housing-Single unit
Property details
Exterior
Property Information
Subdivision Name: DEL MAR
Living Sq. Ft: 1,856
Building Sq. Ft: 1,856
# of Units: 1
Legal Description: LOT 4 BLK 88 TR 368
Lot Information
# of Buildings: 1
Land Sq. Ft: 8,000
Legal Lot Number: 4
Legal Block Number: 88
Acres: 0.1837
Zoning Code: R1
County Use Description: 1 FAMILY RESIDENCE
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,837
Stories: —
Parking Spaces: —
Basement: No
Accessible: No
Lot Size: 8,000 square feet
Style: Single Family Residential
Year Built: 1953
Year Renovated: 1987
County: San Diego County
APN: 3002221100
HOA Dues: —
Garage: No
Features: —
Home facts updated by owner on Aug 12, 2026
Around this home
Schools
Del Mar Hills Elementary School
Public K-6 • Assigned • 0.9mi
10/10
Earl Warren Middle School
Public 7-8 • Assigned • 2.9mi
8/10
Torrey Pines High School
Public 9-12 • Assigned • 2.2mi
10/10
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
3/10 Heat Factor
5 days above 86° expected this year, 14 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
4/10 Air Factor
4 unhealthy days expected this year, 4 days in 30 years
Provided by First Street
Historical weather
Del Mar, CA • 92014
Average low and high temperatures (°F)
66
49
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51
67
54
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55
68
59
70
62
74
65
75
65
75
65
70
58
67
53
65
51
Jan
Feb
Mar
Apr
May
Jun
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Aug
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Dec
Sun exposure
In this area, properties receive around 8.4 hours in
June and 7.3 hours in December, placing it above the
U.S. average for solar exposure.
8.4 hrs
7.3 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$2.83M – $3.42M
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