Rare Monsey shul and redevelopment opportunity! Rare Monsey institutional and redevelopment opportunity at 21 Rita Avenue. This historic property is home to one of Monsey’s earliest shuls and offers an exceptional setting for an existing congregation or for a rabbi, developer or organization seeking to establish and grow a new kehillah in the heart of Monsey. This renovated brick building of useable 2 floors with a basement currently operates as an established shul and includes a main Shul, women’s section, rabbi’s shtiebel, bathrooms, coffee room and complete shul amenities. Additional features include classrooms, a lunchroom, a mikvah, a functional matzah bakery and kosher kiosk and much more. Each complete floor contains approximately 2,500 square feet. The property provides the foundation for building a complete kehillah under one roof, with space for daily minyanim, Shabbos and Yom Tov davening, shiurim, community programming, a kollel, yeshiva, school and other communal services. Its established religious infrastructure allows a new kehillah to begin operating and growing without starting from an empty building. The second floor consists entirely of finished income-producing offices, providing immediate rental revenue. Construction has also begun on the third floor, with the exterior walls already erected and the roof and remaining interior work ready to be completed. The existing building does not maximize the property’s full potential. Additional buildable area may be available in front of the building, creating significant possibilities for expansion or redevelopment. The property is legal for yeshiva, school, commercial, religious and educational uses. Residential zoning also permits sleeping accommodations, offering further flexibility for institutional or residential occupancy. A buyer may continue operating the existing shul and offices, establish and expand a new kehillah, develop a larger religious or educational campus, complete the third floor, or explore a broader redevelopment, including potential multifamily residential use. Major multifamily residential use redevelopment potential with an approximately 45' × 100' buildable floor plate, approximately 4,500 square feet per level, with the potential for three floors plus a full basement totaling approximately 18,000 square feet. This is a unique opportunity to acquire a renovated, income-producing property with deep roots in Monsey’s history and substantial future potential.