1104 ADVANCE ST Investor and builder opportunity in the heart of San Marcos! This approximately 0.15-acre lot offers an exciting opportunity to create an income-producing property in an established area just minutes from Texas State University and Downtown San Marcos. Zoned for duplex residential use, the property already has conceptual duplex plans prepared, giving buyers a head start on envisioning the possibilities. The proposed plans feature two spacious units, each designed with 3 bedrooms, 3.5 bathrooms and an attached garage-an attractive layout for the strong San Marcos rental market. Current 3-bedroom duplex rentals in the area are leasing around $1, 600 per month even without extensive updating, highlighting the potential for newly constructed units with modern finishes. Buyer to independently verify projected rents, zoning, building requirements and development feasibility. The location adds to the investment appeal, with convenient access to Texas State University, Downtown San Marcos, shopping, dining, the San Marcos River and major roadways. Whether you're looking to build and hold as a long-term rental, create housing near the university, or add a new multifamily property to your portfolio, this lot offers a rare opportunity to start with both the land and a duplex concept already in place.