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
$450,000
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
- 351 days |
- 7 |
- 0 |
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 |
|---|---|---|
| 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
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 mi
- 6/10Monte Vista High SchoolGrades: 9-12Distance: 1.5 mi
- 7/10Sweetwater Springs Elementary SchoolGrades: K-6Distance: 1.3 mi
A local agent can set up tours, give advice and negotiate with sellers.
- California
- San Diego County
- Spring Valley
- 91977
- 0 Harness St Unit 0
Nearby cities
Nearby zip codes
Other Spring Valley Topics
