Live, Work & Play! Welcome to 8 & 12 Mac Ave! Discover a rare waterfront investment and development opportunity in the heart of Keswick! Situated along the scenic Maskinonge River with direct boating access to Lake Simcoe, this unique property offers a private marina with approximately 20 boat slips, including a covered dock, two residential 2-bedroom apartments, and a guest suite, providing excellent income-generating potential. An exceptional opportunity for investors, developers, and boating enthusiasts seeking to combine business, lifestyle, and waterfront living. Explore the exciting possibilities for future waterfront redevelopment, including potential multi-storey condominiums, townhomes, retail space, or restaurant. Ideally located just minutes from Highway 404, shopping, restaurants, grocery stores, schools, parks, and everyday amenities. Phase I and Phase II Environmental Site Assessments completed in 2025. A truly unique opportunity to own a waterfront property with multiple income streams and future development potential in Keswick's growing waterfront community!