- Allyn & O'Donnell Realtors
- B & B Real Estate
- B & C Realty
- Carlson Gmac
- E R Realty
- Elmwood Towers Assoc
- G & D Properties
- Infinity Real Estate Group Inc
- M & A Realty LLC
- Martinelli & Martini Realtors
- Mayo Realty Inc
- Oakhill Home Ownership
- Open Source
- Partners Real Estate
- Trident Holyoke LLC
- Windsor Realty
