- Hemco Realty Corp.1
- Henkels, Charles H.8
- Henkim Realty Corp.1
- Henry A. Klar Realty13
- Henry Norman Associates Builders1
- Henry Puchall and Co.1
- Henwin Realty Corp.1
- Herbert Charles and Co., Inc.311
- Herbert, McLean, Purdy Management Corp.1
- Herman, Milton1
- Hermax Construction, Inc.1
- Herzog, Elias4
- Hess Associates3
- Hess, Paul1
- Hidson and Grove Strees Inc.1
- Highway Properties, Inc.1
- Hill Management Co.1
- Hilldale Properties Inc.1
- Hillpark Development Corp.1
- Hillyer and Bell20
- Hilton Builders Corp.1
- Hirsch, Alexander1
- Hoberman and Wasserman1
- Hoffman, F. Burrall, Jr.5
- Hohauser, William I.2
- Holland, Jack J.1
- Holland-Brecher Building Corp.3
- Holliswood Hills Apartments, Inc.1
- Homebound Building Corp.1
- Hood, Godley, and Fouihoux1
- Hood, Raymond12
- Horace Ely and Co.1
- Horace Ginsbern and Associates41
- Horowitz, Stanley L.3
- Hotel Pierre, Inc.7
- Hotpoint1
- House and Apartment Sales Corp.14
- Housing and Redevelopment Board of The City of New York1
- Hudson Manor Avenue Apartments, Inc.5
- Hunter Gardens, Inc.3
- I. Orlian and Sons5
- I.G. Wolf-R.A. White, Inc.1
- I.J. Associates, Inc.1
- I.J. Realty Corp.1
- I.M. Pei and Associates14
- Imarata, Lawrence1
- Imperial Square Associates10
- Income Properties, Inc.11
- Independence Terrace Corp.1
- Industrial Real Estate Development2
- Interboro Realty Co.9
- Ipswich Development Corp.16
- Irving Place Associates3
- Irving Seelig and Son2
- Irvmar Realty Corp.1
- Irvson Realty Corp.1
- Iser, Gustave W.7
- Ithaca Street Apartments Co.1
- J. L. Properties Inc.1
- J.C. and M.G. Mayer1