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.
Lot/land
Price cut: $25K (5/1)
$425,000
0 Harness St #0, Spring Valley, CA 91977
0beds
0baths
0.65Acres
Unimproved Land
Built in ----
0.65 Acres Lot
$-- Zestimate®
$--/sqft
$-- HOA
What's special
Two contiguous parcelsRare double-lot
- 404 days |
- 118 |
- 1 |
Zillow last checked:
Listing updated:
Listed by:
Mance D Rieder DRE #02050930 Preferred:858-295-0556,
Real Broker,
Dennis B Rieder DRE #02014241 858-232-2929,
Real Broker
Source: SDMLS,MLS#: 250027245
Originating MLS: San Diego Association of REALTOR
Originating MLS: San Diego Association of REALTORFacts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 0
- Bathrooms: 0
Interior area
- Total structure area: 0
Property
Features
- Fencing: N/K
- Frontage type: Open Space,Other/Remarks
Lot
- Size: 0.65 Acres
Details
- Parcel number: 5781021400
- Zoning: R-1
- Zoning description: R-1
Utilities & green energy
- Water: N/K
- Utilities for property: N/K
Community & HOA
Community
- Subdivision: SPRING VALLEY
Location
- Region: Spring Valley
Financial & listing details
- Date on market: 5/12/2025
- Listing terms: Cal Vet,Cash,Conventional,VA
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 5/1/2026 | Price change | $425,000-5.6% |
Source:  SDMLS #250027245 Report a problem | ||
| 4/28/2026 | Listed for sale | $450,000 |
Source: SDMLS #250027245 Report a problem | ||
| 9/12/2025 | Listing removed | $450,000 |
Source: SDMLS #250027245 Report a problem | ||
| 5/12/2025 | Listed for sale | $450,000 |
Source: SDMLS #250027245 Report a problem | ||
Public tax history
Tax history is unavailable.
Monthly payment
Estimated monthly payment$1,822
All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
See how much you could borrow to make a competitive offer.
Climate risks
Neighborhood: 91977
Nearby schools
GreatSchools rating
- 6/10Science, Technology, Engineering, Arts, And Math Academy At La PresaGrades: 5-8Distance: 1.1 mi
- 6/10Monte Vista High SchoolGrades: 9-12Distance: 1.5 mi
- 7/10Sweetwater Springs Elementary SchoolGrades: K-5Distance: 1.3 mi
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- California
- San Diego County
- Spring Valley
- 91977
- 0 Harness St Unit 0
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