0 Harness St, Spring Valley, CA 91977

—

Beds

—

Baths

—

Sq ft

About this home

Rare double-lot opportunity in Spring Valley. Two contiguous parcels sold together -- APNs 578-102-14-00 and 578-102-15-00 -- combining to create a highly flexible development site in one of San Diego County's most in-demand inland corridors. Under current 2026 California law, this site supports significant density. Build two single-family residences (up to approximately 3,000 sqft each), with ADU and Junior ADU potential on each lot per California's expanded ADU statutes. SB-9 lot-split and duplex provisions may unlock additional units, subject to County of San Diego zoning verification. Whether you are a builder looking for your next project, an investor positioning for long-term hold, or an end-user who wants to build custom and keep a second lot -- this is the kind of opportunity that rarely comes packaged this cleanly. No demo. No teardown. Just raw land, ready to go. Buyer to verify all zoning, permitted uses, utility availability, and development potential with County of San Diego prior to close.

Type

Residential

Year built

—

Lot

28,314 sq ft (0.65 ac)

Garage

—

HOA

None

Pool

View

—

Solar

—

Estimated payment

$2,680/mo

Principal & interest$2,149
Property tax (est.)$407
Home insurance (est.)$124

Down payment: 20% ($85,000)Interest rate %

Example only, not a loan offer. Rate is a placeholder; ask a lender for today's. Taxes vary by neighborhood (Mello-Roos).

Listing provided courtesy of Dennis Rieder, Real Broker. MLS# 260019164SD. Based on information from California Regional Multiple Listing Service, Inc. as of November 1, 2026 at 9:30 AM Pacific. Information is deemed reliable but not guaranteed and is provided exclusively for consumers' personal, non-commercial use to identify prospective properties they may be interested in purchasing. Coldwell Banker Associated Brokers Realty, CA DRE #00939614.