There are multiple listings for this address:
Unique Investment Opportunity in Twin Oaks Valley – only 10 miles inland. 4 contiguous parcels with 2 detached houses and 800 sf shed on 8.67 acres, including private road. Two houses: 515B, and 515A – appraised in October 2023 for a combined value of $2.2M! Appraisal did NOT include the 2 additional parcels. APNs 182-280-13, -14, -15, and 182-240-25. R-2 zoning. Unincorporated San Marcos – San Diego County jurisdiction. 515B was built in 1982, and currently has 4 bedrooms, 3 baths, plus a studio, with an attached 2 car garage. 515A was built in 1947, and currently has 4 bedrooms and 2 baths. Both houses and the shed have separate electric meters, and there is one 2 inch water meter at the shed. This is an opportunity for a builder to create a compound, or develop multiple properties. County zoning allows for ADU and detached workshops. Fantastic location: easy freeway access, both the 78 and 15 are less than 10 minutes away. Only 4 miles to Cal State San Marcos and Palomar College. Rare chance to build in Twin Oaks Valley!
Property Details
Price:
$1,800,000
MLS #:
NDP2504770
Status:
Active
Beds:
4
Baths:
3
Type:
Single Family
Neighborhood:
92069sanmarcos
Listed Date:
Jul 14, 2025
Finished Sq Ft:
2,368
Lot Size:
377,665 sqft / 8.67 acres (approx)
See this Listing
Schools
Interior
Exterior
Community Features
FHL
Financial
Map
Community
- Address515 Cassou RD San Marcos CA
- CitySan Marcos
- CountySan Diego
- Zip Code92069
Subdivisions in San Marcos
Market Summary
Current real estate data for Single Family in San Marcos as of Dec 16, 2025
267
Single Family Listed
73
Avg DOM
406
Avg $ / SqFt
$827,492
Avg List Price
Property Summary
- 515 Cassou RD San Marcos CA is a Single Family for sale in San Marcos, CA, 92069. It is listed for $1,800,000 and features 4 beds, 3 baths, and has approximately 2,368 square feet of living space.The current price per square foot is $760. The average price per square foot for Single Family listings in San Marcos is $406. The average listing price for Single Family in San Marcos is $827,492.
Similar Listings Nearby
Courtesy of Mylene Merlo, Broker. Disclaimer: All data relating to real estate for sale on this page comes from the Broker Reciprocity (BR) of the California Regional Multiple Listing Service. Detailed information about real estate listings held by brokerage firms other than include the name of the listing broker. Neither the listing company nor shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. The Broker providing this data believes it to be correct, but advises interested parties to confirm any item before relying on it in a purchase decision. Copyright 2025. California Regional Multiple Listing Service. All rights reserved.515 Cassou RD
San Marcos, CA
Unique Investment Opportunity in Twin Oaks Valley – only 10 miles inland. 4 contiguous parcels with 2 detached houses and 800 sf shed on 8.67 acres, including private road. Two houses: 515B, and 515A – appraised in October 2023 for a combined value of $2.2M! Appraisal did NOT include the 2 additional parcels. APNs 182-280-13, -14, -15, and 182-240-25. R-2 zoning. Unincorporated San Marcos – San Diego County jurisdiction. 515B was built in 1982, and currently has 4 bedrooms, 3 baths, plus a studio, with an attached 2 car garage. 515A was built in 1947, and currently has 4 bedrooms and 2 baths. Both houses and the shed have separate electric meters, and there is one 2 inch water meter at the shed. This is an opportunity for a builder to create a compound, or develop multiple properties. County zoning allows for ADU and detached workshops. Fantastic location: easy freeway access, both the 78 and 15 are less than 10 minutes away. Only 4 miles to Cal State San Marcos and Palomar College. Rare chance to build in Twin Oaks Valley!
Property Details
Price:
$1,800,000
MLS #:
NDP2504771
Status:
Active
Beds:
0
Baths:
0
Type:
Land
Neighborhood:
92069sanmarcos
Listed Date:
Jul 14, 2025
Lot Size:
377,665 sqft / 8.67 acres (approx)
See this Listing
Schools
Interior
Exterior
Community Features
FHL
Financial
Map
Community
- Address515 Cassou RD San Marcos CA
- CitySan Marcos
- CountySan Diego
- Zip Code92069
Subdivisions in San Marcos
Market Summary
Current real estate data for Land in San Marcos as of Dec 16, 2025
267
Land Listed
73
Avg DOM
406
Avg $ / SqFt
$827,492
Avg List Price
Property Summary
- 515 Cassou RD San Marcos CA is a Land for sale in San Marcos, CA, 92069. It is listed for $1,800,000 and features 9 acres.
Similar Listings Nearby
Unique Investment Opportunity in Twin Oaks Valley – only 10 miles inland. 4 contiguous parcels with 2 detached houses and 800 sf shed on 8.67 acres, including private road. Two houses: 515B, and 515A – appraised in October 2023 for a combined value of $2.2M! Appraisal did NOT include the 2 additional parcels. APNs 182-280-13, -14, -15, and 182-240-25. R-2 zoning. Unincorporated San Marcos – San Diego County jurisdiction. 515B was built in 1982, and currently has 4 bedrooms, 3 baths, plus a studio, with an attached 2 car garage. 515A was built in 1947, and currently has 4 bedrooms and 2 baths. Both houses and the shed have separate electric meters, and there is one 2 inch water meter at the shed. This is an opportunity for a builder to create a compound, or develop multiple properties. County zoning allows for ADU and detached workshops. Fantastic location: easy freeway access, both the 78 and 15 are less than 10 minutes away. Only 4 miles to Cal State San Marcos and Palomar College. Rare chance to build in Twin Oaks Valley!
Property Details
Price:
$1,800,000
MLS #:
NDP2504938
Status:
Active
Beds:
0
Baths:
0
Type:
Single Family
Neighborhood:
92069sanmarcos
Listed Date:
Jul 14, 2025
Lot Size:
377,665 sqft / 8.67 acres (approx)
See this Listing
Schools
Interior
Exterior
Community Features
FHL
Financial
Map
Community
- Address515 Cassou RD San Marcos CA
- CitySan Marcos
- CountySan Diego
- Zip Code92069
Subdivisions in San Marcos
Market Summary
Current real estate data for Single Family in San Marcos as of Dec 16, 2025
267
Single Family Listed
73
Avg DOM
406
Avg $ / SqFt
$827,492
Avg List Price
Property Summary
- 515 Cassou RD San Marcos CA is a Single Family for sale in San Marcos, CA, 92069. It is listed for $1,800,000 and features 0 beds, 0 baths, and has approximately 0 square feet of living space.The average price per square foot for Single Family listings in San Marcos is $406. The average listing price for Single Family in San Marcos is $827,492.