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0 Harness St

0 Harness St

Cdirt

Spring Valley, CA 91977

$425,000

Lot Size

0.65 acres

Asking $/Acre

$653,846

Days on Market

97

Property Type

Land

HOA/mo

N/A

MLS ID

260019164SD

This property is in Spring Valley (91977). View the Spring Valley land market →

About This Property

Rare double-lot development opportunity in Spring Valley -- APNs 578-102-14-00 and 578-102-15-00 sold together. Two contiguous parcels create a flexible canvas for builders, investors, and end-users navigating today's California housing landscape. Under current 2026 state law, the development potential is significant: build two single-family residences (up to ~3,000 sqft each), plus the potential for ADUs and Junior ADUs on each lot per California's expanded ADU statutes. SB-9 lot-split and duplex provisions may further unlock additional units, subject to County of San Diego zoning and verification.

Location

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What a Buyer Will Check

Worth a look: flat, splittable

0.63 acres of vacant residential land on Harness St, county land with a Spring Valley address, zoned RS, single-family residential, 6,000 sq ft lots. The zoning allows about 4 homes (7.3 per acre). The ground is close to flat: lidar puts the median slope at 5%, and the soil survey calls it stony clay, well drained, very limited for houses. It sits outside the flood zone and any fire zone. It has 16 m of public street frontage on Harness St, with Helix Water District water. Sewer is unknown.

From FEMA, USGS lidar, the USDA soil survey, CAL FIRE, SANDAG and county and city zoning, checked Nov 7, 2026. Public records, not a survey: confirm with the city or county before you buy.

Want to know more about this land or have questions?

Zoned Schools

  • Elementary

    Avondale Elementary · grades K-5 · La Mesa-Spring Valley

  • Middle

    Science, Technology, Engineering, Arts, and Math Academy at La Presa · grades 5-8 · La Mesa-Spring Valley

  • High

    Mount Miguel High · grades 9-12 · Grossmont Union High

The district's assigned schools for this parcel, from its attendance boundaries and rules. Boundaries change: confirm with the district before you buy.

Dirt Analysis
Cdirt
104% above comp value
Asking $425,000 vs ~$208,097 implied by sold-land comps
Lot size
28,314 sqft
Asking $/acre
$653,846
Zip median $/acre (sold)
$588,676
Comp-implied value
$208,097

Benchmarked against 2,889 sold-land comps (5-yr, recency-weighted) via zip price-size model · high confidence. Land value is site-specific — zoning, utilities, access, and buildability are not modeled. Not an appraisal.