Harness St
Spring Valley, CA 91977
28,314Sqft(Lot)
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.
Property Details
Map
Map
Features
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Lot Information
Main Square Feet: 28314 Lot Size Acres: 0.65 Lot Size Source: Assessor Lot Size Square Feet: 28,314Property Information
Subdivision: Spring Valley Source Property Type: Land
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Listing Price Information
Listing Price: $425000Cash, Conventional, CalVetLoan, FHA, VaLoan
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Tax Information
Parcel Number: 5781021400
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Location Information
Direction: Google 8601 Harness St, Spring Valley and lots will be across the street. At the corner of Harness St and Sweetwater Rd. CrossStreet: Ellen Street
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Nearby Home Value
| Address | Estimate | Bed | Bath | Sq. Ft | Lot Size |
|---|---|---|---|---|---|
| Eucalyptus Street, Spring Valley, CA, 91977 | $480,000 | -- | -- | -- | 17,944 Sqft(Lot) |
| 1408 Coronado Ave, Spring Valley, CA, 91977 | $175,000 | -- | -- | -- | 6,393 Sqft(Lot) |
| 9351 Vista Drive, Spring Valley, CA, 91977 | $450,000 | -- | -- | -- | 30,492 Sqft(Lot) |
| 1435 39 Capistrano Ave, Spring Valley, CA, 91977 | $260,000 | -- | -- | -- | 18,985 Sqft(Lot) |
| Grand Avenue, Spring Valley, CA, 91977 | $230,000 | -- | -- | -- | 6,999 Sqft(Lot) |
| Jamacha Blvd, Spring Valley, CA, 91977 | $539,000 | -- | -- | -- | 15,784 Sqft(Lot) |
| Ramona Avenue, Spring Valley, CA, 91977 | $250,000 | -- | -- | -- | 6,534 Sqft(Lot) |
| 9240 Harness St, Spring Valley, CA, 91977 | $2,200,000 | -- | -- | -- | 348,480 Sqft(Lot) |
Similar Land To Harness St
Nearby For Sale
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ByOwner last updated this listing 08/16/2026 @ 18:57
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