423 Halstead Avenue Exceptional investment and development opportunity in the heart of Mamaroneck! Located just one block from Metro North with direct access to NYC, this C-1 zoned property offers tremendous upside for investors, end-users, and developers alike. Set on a 6, 475 SF lot with a FAR of 0.88, the property allows for up to approximately 5, 698 buildable square feet, with additional potential under transit-oriented development incentives. Ideal for mixed-use redevelopment or expansion. Currently configured as a legal two-family property, featuring: two spacious 3-bedroom units with separate entrances, recently updated interiors with strong rental appeal, separate gas, electric meters and heating systems for each unit, oversized 2-car garage plus additional storage, perfect for immediate income generation while planning future development. Situated within walking distance to Mamaroneck Metro North, Harbor Island Park & Beach, and the vibrant Mamaroneck Avenue corridor filled with restaurants, shops, and entertainment. A rare opportunity combining location, income, and development potential in one of Westchester's most desirable and transit-oriented communities.