- Bing and Bing, Inc.32
- Bio Associates, Inc.1
- Bio Construction Corp.1
- Birch-Hillside Corp.1
- Birchwood Organization1
- Birchwood Park9
- Birnbaum, Philip183
- Blair Hall, Inc.1
- Blank and Zabb1
- Blaufeux, Maxfield4
- Blitman Construction Corp.8
- Blum, Edward1
- Blum, George1
- Boak and Paris9
- Boak and Raad65
- Bogdus Holding Corp.1
- Bonner Realty and Construction Corp.9
- Bonnie Lynn Realty Corp.1
- Boomer, Lucius6
- Borchard Affiliates, Inc.4
- Borchard Management Corp.7
- Borne-Chisner Development Corp.15
- Bosa Builders, Inc.1
- Bosa Building Corp.1
- Botannia Corp.1
- Boulevard Construction Corp.1
- Bradhurst Associates, Inc.1
- Brandinger, A.1
- Branton Apartments, Inc.1
- Braunstein, Benjamin18
- Brecher, Morris1
- Breed, Fuller, and Dick2
- Bres Realty Co.13
- Brett and Wyckoff, Inc.16
- Brett, Wyckoff, Potter, Hamilton, Inc.15
- Brevoort Associates, Inc.8
- Briarwood Court One Corp.1
- Briarwood Holding Corp.3
- Bricken Brothers, Inc.1
- Brill-Tishman Construction Co.3
- Briscope Management3
- Britz, Steven Pan3
- Broadway-New Street Corp.2
- Brody, S.A.2
- Broff, Irving1
- Broff, Stanley R.24
- Broka, Clifford V.2
- Bronxwood Towers, Inc.9
- Brookboro Realty Corp.1
- Brookfield Organization2
- Brown and Guenther11
- Brown, Guenther, Battaglia and Galvin8
- Brown, Guenther, Boos1
- Brown, Harris, Stevens, Inc.97
- Brown, Jack55
- Brown, Simon and Furtsch, Inc.2
- Brown, Wheelock, Harris and Co., Inc.1
- Brown, Wheelock, Harris, Inc.1
- Brown, Wheelock, Harris, Stevens, Inc.61
- Brown, Wheelock, Harris, Vought and Co., Inc.74