- Case Builders, Inc.1
- Castle Gardens, Inc.1
- Caterina Building Corp.1
- Caton Holding Corp.1
- Caton Park Estates, Inc.1
- Cauldwell Terrace Construction Corp.1
- Cedarhurst Park Apartments, Inc.1
- Central Herrick Corp.1
- Central NBP Midlawn1
- Chain Building Corp.1
- Chatham-Phenix Building1
- Chelsea Associates1
- Chelsea Land Corp.1
- Churchill Land Corp.1
- Ciampa Organization1
- Ciampi, C.1
- Ciampson Realty Corp.1
- Ciluzzi Construction Corp.1
- Citadel Hall, Inc.1
- Citizens Savings Bank1
- City Builders, Inc.1
- Clarciam Realty Corp.1
- Clark T. Chambers, Inc.1
- Clark-Robinson Corp.1
- Clement E. Merowit and Co.1
- Climcheck, S.1
- Clinton Construction Corp.1
- Clinton Housing Association1
- Clinton Terraces, Inc.1
- Clover Building Corp.1
- Code Holding Corp.1
- Cohen, Rabbi Eugene1
- Coldwell Banker1
- Colemont Realty Corp.1
- Colonial Apartments, Inc.1
- Colonial Realty Co., Inc.1
- Colony Gardens, Inc.1
- Colton Realty Corp.1
- Columbia University College of Physicians and Surgeons1
- Commercial Builders, Inc.1
- Commodore Construction Co., Inc.1
- Commonwealth Syndicate, Inc.1
- Community Development Agency1
- Compton Estates, Inc.1
- Conco Realty Corp.1
- Concord Hall, Inc.1
- Concourse Building Corp.1
- Concourse Crescent Corp.1
- Concourse Properties, Inc.1
- Concourse and 181st Street Corp.1
- Congregation Netsah Israel, Inc.1
- Congress Gardens, Inc.1
- Connelly Brothers1
- Convent Gardens, Inc.1
- Convertible Homes, Inc.1
- Cooperman, Philip1
- Coral Gardens, Inc.1
- Corbin Terrace Apartments, Inc.1
- Corcoran, Francis L.1
- Cord Meyer Co.1