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California Regional Multiple Listing Service

The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for viewer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional.

Based on information from California Regional Multiple Listing Service, Inc. as of the most recent time synced and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information

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Home / Spring Valley / Harness St
Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 Harness St Spring Valley, CA 91977 View All Photos

$425,000

| Active

Harness St

Spring Valley, CA 91977

0.65
Acres
1
Days on Market
260019164SD
MLS#
Land
Structure
Residential
Zone
Contact
Listing OfficeReal Broker

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
Acres
0.65
Lot Size (sqft)
28314.0
Parking Spaces
0.0
Property Type
Purchase
Subdivision
Spring Valley
County
San Diego
Region
Spring Valley
Zoning
R1
Original List Price
$425,000
HOA Fees
0.0
MLS #
260019164SD
Property Subtype
Land
Parcel Number
5781021400
MLS #
260019164SD
Date Listed
August 05, 2026
Address
Harness St
Location
Legal

The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for viewer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional.

Based on information from California Regional Multiple Listing Service, Inc. as of the most recent time synced and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information

Provided By
Listed by Dennis Rieder (#SAND-676399)
Listing Office: Real Broker (#SAND-7899)

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