Endless Possibilities on a Premier Quarter-Acre Lot in the Heart of San Marcos. Welcome to 3704 La Colusa, a beautifully updated single-level home situated on an expansive corner lot in one of San Marcos’ most desirable neighborhoods. Offering a rare combination of move-in ready updates and incredible future potential, this 3-bedroom, 2-bathroom residence sits on a sprawling quarter acre lot, providing endless opportunities to create your dream property. In addition to the main living space, the attached garage is already outfitted with a closet and its own mini split unit— making it the perfect space for a 4th bedroom, home office, gym, or easily convertible attached ADU for multi-generational living or rental income. With a huge side yard ideal for RV or boat parking , and existing water and sewer hookups at the back of the property. The lot offers plenty of space to add a detached ADU, pool, or custom outdoor living space. There's even the option to create a separate driveway for ultimate privacy and flexibility. The interior has been thoughtfully refreshed with brand new carpet and hardwood flooring throughout, a brand new kitchen sink, faucet, and disposal, brand new countertops, fresh interior paint, and upgraded systems including a brand new roof and gutters, new water heater, new sewer line, and new central heat and A/C. A house leak detection and shut-off valve has also been added for peace of mind. Step outside to your own private backyard retreat.
Sold for $820,000 on 05/14/25
$820,000
3704 La Colusa Dr, San Marcos, CA 92078
3beds
1,100sqft
Single Family Residence
Built in 1964
0.25 Acres Lot
$803,800 Zestimate®
$745/sqft
$3,856 Estimated rent
What's special
Zillow last checked: 7 hours ago
Listing updated: May 15, 2025 at 11:00am
Listed by:
Jenica Martin DRE #01933551 925-787-1911,
Douglas Elliman of California, Inc.
Bought with:
Cynthia E Spencley, DRE #02049871
eXp Realty of Southern California, Inc.
Source: SDMLS,MLS#: 250023972
Originating MLS: San Diego Association of REALTOR

Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 3
- Bathrooms: 2
- Full bathrooms: 2
Heating
- Forced Air Unit
Cooling
- Central Forced Air
Appliances
- Included: Dishwasher, Range/Oven, Refrigerator
- Laundry: Gas & Electric Dryer HU
Interior area
- Total structure area: 1,100
- Total interior livable area: 1,100 sqft
Property
Parking
- Total spaces: 4
- Parking features: Attached
- Garage spaces: 2
Features
- Levels: 1 Story
- Pool features: N/K
- Fencing: Full
Lot
- Size: 0.25 Acres
Details
- Parcel number: 2193901100
- Zoning: R-1:SINGLE
- Zoning description: R-1:SINGLE
- Special conditions: N/K
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Stucco
- Roof: Shingle
Condition
- Year built: 1964
Utilities & green energy
- Sewer: Sewer Connected
- Water: Meter on Property
Community & neighborhood
Location
- Region: San Marcos
- Subdivision: SAN MARCOS
Other
Other facts
- Listing terms: Cash,Conventional,FHA,VA
Services availability
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Estimated market value
$803,800