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
What's Nearby
Nearby Areas
Features
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Bathroom Information
Total Baths: 0
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Fencing
None
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Lot Details
Lot Dimensions Source: Vendor Enhanced Lot Size Acres: 0.65 -
Lot Size Source: Assessor Lot Size Square Feet: 28314
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Listing Price Information
Original List Price: 425,000 Listing Contract Date: 2025-05-12 -
Lease Information
Listing Agreement: Exclusive Right To Sell
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Tax Information
Parcel Number: 5781021400
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Other Property Info
Source Listing Status: Active Source Neighborhood: 91977 - Spring Valley Directions: CrossStreet: Eileen Street Zoning: R-1 Source Property Type: Land Area: 91977 - Spring Valley
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Nearby Home Value
| Address | Estimate | Bed | Bath | Sq. Ft | Lot Size |
|---|---|---|---|---|---|
| La Mesa Avenue, Spring Valley, CA, 91977 | $149,000 | -- | -- | -- | 12,632.40 Sqft(Lot) |
| 1408 Coronado Ave, Spring Valley, CA, 91977 | $175,000 | -- | -- | -- | 6,393 Sqft(Lot) |
| Eucalyptus Street, Spring Valley, CA, 91977 | $489,000 | -- | -- | -- | 17,944 Sqft(Lot) |
| 9351 Vista Drive, Spring Valley, CA, 91977 | $450,000 | -- | -- | -- | 30,492 Sqft(Lot) |
| 39-1435 Capistrano Ave, Spring Valley, CA, 91977 | $260,000 | -- | -- | -- | 18,985 Sqft(Lot) |
| 8840 Leigh Ave, Spring Valley, CA, 91977 | $999,000 | -- | -- | -- | 203,425 Sqft(Lot) |
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ByOwner last updated this listing 06/04/2026 @ 19:31
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