This home (APN: 148-063-20-00) MUST be sold together with the adjacent vacant LOT (APN: 148-063-21-00, MLS#: OC26010908). Welcome to this Coastal R3 Investment Opportunity. This Two Homes on One LOT + Additional Vacant LOT (listed separately) currently listed for sale in Oceanside. Discover an exceptional investment and development opportunity in the heart of Oceanside. This unique property features two homes on one LOT all situated within an R3 coastal zoning area, offering incredible flexibility for homeowners, investors, and developers alike. The main residence offers 1,246 square feet of living space with 3 bedrooms and 2 bathrooms on a 4,974-square-foot lot. The home has been freshly painted inside and out and features mini-split heating and air conditioning throughout the house and the attached addition for year-round comfort. Built in 2014, the attached addition provides an additional 580 square feet of living space and includes 2 bedrooms, 1 bathroom, and a full kitchen, making it ideal for multigenerational living, guest accommodations, or rental income. Together, both living spaces offer a total of 1,826 square feet, plus an additional 400-square-foot detached garage. Adding even more value is the separate 5,023 sqft vacant LOT, creating endless possibilities for future development. Under the R3 coastal zoning designation, buyers may have the opportunity to build a new home with up to four ADUs (two detached ADUs, one conversion ADU, and one JADU) or potentially develop a triplex. Buyers are encouraged to verify all development opportunities with the City of Oceanside. Ideally located just minutes from the iconic Oceanside Pier, Oceanside Harbor, beautiful beaches, Camp Pendleton, and major transportation corridors, including Highways 5, 76, and 78, this property offers the perfect combination of coastal living, income potential, and long-term investment value. Opportunities like this are incredibly rare. Whether you're looking to expand your real estate portfolio, develop additional units, or create a multigenerational coastal compound, this property offers unlimited potential.