- Gruenstein and Mayer2
- Grutman Brothers1
- Guest, Gertrude1
- Guyet, Paul1
- H and W Building Corp.2
- H. Clayton Smith and Co.12
- H. Stanley Hillyer, Inc.1
- H.J. Kalikow and Co., Inc.12
- H.J.G. Haft and Co., Inc.1
- H.S. Hillyer and Co., Inc.2
- HRH Construction Co., Inc.1
- Hageman, A.A.2
- Hageman, John2
- Halpern and Pintel3
- Hamilton, Iselin and Co., Inc.1
- Hampton Management Co.1
- Hanfield, Hillyer, and Bell, Inc.14
- Hanover Properties, Inc.2
- Harbill Building Corp.1
- Hardy, Brauneis, and Naumann1
- Harlemco Development Corp.1
- Harper Management7
- Harris, Newmark and Co.6
- Haven Building Corp.1
- Hearn, Ralph1
- Hegeman Harris Co., Inc.1
- Hehring Brothers Inc.1
- Helmsley-Spear, Inc.71
- Henry Fippinger, Inc.3
- Henry Phipps Estates2
- Herbert Albert Corp.1
- Herbert Charles and Co., Inc.232
- Herbert, McLean, Purdy Management Corp.5
- Herkimer Industries1
- Hidson and Grove Strees Inc.1
- Hilldale Properties Inc.1
- Hillside Holding Corp.2
- Hillyer and Bell21
- Hines and Hines, Inc.1
- Hirsch, Alexander2
- Hodgman1
- Hollyday and Ives, Inc.20
- Homefinders, Ltd.1
- Horace Ely and Co.1
- Horace S. Ely and Co.5
- Horn and Burke4
- Hotel Pierre, Inc.8
- Hovan Realty Corp.1
- Howard P. Hoffman Associates1
- Huberth and Huberth, Inc.1
- Hudon Towers Corp.2
- Hupfel, Jogn G.1
- Imperial Realty Corp.2
- Income Properties, Inc.12
- Irvin House Inc.1
- Irving Place Associates3
- Isidore Rosen and Sons, Inc.2
- J. L. Properties Inc.1
- J. Perlbinder and Sons1
- J. Rodman Realty Co.2