- Northern Executive Plaza
- Northgate Properties
- Northgate Properties
- Northglenn Service Ctr
- Northlake Business Park
- Northlake Business Park Co
- Northlake Corporate Park
- Northlake Property Management
- Northland Towers Management
- Northland Towers Management
- Northland Trumbull
- Northpark Town Ctr
- Northside Park
- Northwest Bank Tower Buildings
- Northwest Builders
- Northwest Corporate Ctr
- Northwest Office Ctr
- Northwood Medical Ctr
- Nortion Construction Bldg
- Norwest Bank Building
- NPR
- NRILLC
- Nts Development Co
- Nutmeg Management Corp
- NYNEX Business Ctr
- O'Brien Interests Inc
- O'Dovero Properties
- Oak Business Ctr
- Oak Hill West Realty
- Oak Lane Business Ctr
- Oak Park Business Ctr
- Oak Park Executive Suites
- Oak Park Medical Building
- Oak Point Development Group
- Oak Tower
- Oak Tree Business Ctr
- Oakridge-Winfield Pro Ctr
- Oaks Executive Building
- Oakwood Corporate Ctr
- Ober Building
- Ocean Bank
- Ocean City Lofts
- Ocean Executive Suites
- Ocean View Ctr
- OFC Building
- Office Building & Home
- Office Centers
- Office Centers
- Office Court Assoc
- Office Design & Construction
- Office Interiors Inc
- Office Mall
- Office Park 1800 Westborough
- Office Park 2000 Westbourgh
- Office Park At California Club
- Office Park LLC
- Office Park South
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Office Suites Plus
- Officeint Offices
- Officespaces
- Ogden Street Lofts
- Ohio One Corp
- Oil Center
- Oklahoma Tower
- Old Market Lofts
- Old Pickle Factory
- Old Troy Pike Office Building
- Olive Limited Partnership
- Oliver Lofts
- Oliver Waters Building
- Olympic Towers
- Omni Building Svc
- Omni Executive Ctr
- Omni Management Group
- Omni Offices
- Omnicare Clinical Research
- ONB Tower
- One 7000 Place
- One Arin Park
- One Boulder Plaza Mgmt Co
- One Camelback Office Building
- One Century Tower
- One Chagrin Highlands
- One Cherry Hill Leasing Office
- One Cherry Hill Management Ofc
- One City Plaza
- One Cleveland Ctr
- One Concord Ctr Management
- One Court Street Assoc
- One Dayton Ctr
- One Farragut Square S
- One Grand Ctr
- One Hundred Fairfield Assn
- One Hundred Park Avenue Bldg
- One Jackson Place
- One Main Place Building
- One Ninety Plaza Professional
- One Pacific Plaza
- One Park Place Executive Suite
- One Park Place Leasing Office
- One Pensacola Plaza
- One Post Road Fairfield
- One River Plaza Co
- One Segate Ofc Bldg & Leasing
- One Stop Business Ctr
- One Technology Plaza
- One Technology Plaza
- One Thousand Connecticut Ave
- One Thousand Connecticut Ave
- One Tryon Ctr-Security
- One West Building
- One-Ninety-One Peachtree Assoc
- ONEDTC Office Building Mgmt
- Ontario Professional Plaza
- Onyx Plaza
- Onyx Plaza
- Opine Rialto Ctr LLC
- Orange Commerce Tower
- Orange Grove Commerce Park
- Orange Medical Complex
- Orange Park Business Ctr
- Orchard Hill Office Park
- Oregon National Bldg
- Oregon Pacific Invstmnt Devmnt
- Orme Building
- Ormond Business Ctr Leasing
- Oroville Professional Arts Ctr
- Orpheum Centre Management
- Orpheum Electric Bldg
- Orpheum Lofts
- Osbourne's Commerce Plaza
- Oswego Falls Management
- OTS Business Ctr
- Overlook Leasing & Management
- Owens Medical Ctr
- P M Realty Group
- P S Commercial Properties
- Pacal Business Ctr
- Pacific Building Care
- Pacific Executive Plaza
- Pacific Med Plaza LLC
- Pacific Office Ctr
- Pacific Place Assoc
- Pacific Vii Realty Trust
- Packard Lofts
- Packard Lofts
- Pacwest Center
- PAL Bldg
- Palace Building
- Palace Lofts
- Pali Palms Plaza
- Palisades At West Paces
- Palm Beach Gardens Office Park
- Palm-Aire Building
- Palm-Aire Plaza
- Palmarina Office Park Inc
- Palmer Associates Inc
- Palmer Building
- Palmer Business Ctr Mktng Ctr
- Palmetto Bay Ctr
- Palmetto Bay Village Ctr
- Palmetto Court Office
- Palo Alto Business Park
- Palos Verdes Professional Ctr
- Paolino Properties
- Paragon At Southpoint
- Paragon Centre Office Park
- Paragon Two
- Paramont Office Building
- Paraworks
- Parc Centre Office Building
- Parc Lofts
- Parc Place Executive Ctr
- Pardee Medical Office Blg
- Parisian Construction
- Park 50 Technecenter
- Park Abbey Building
- Park At Allens Creek
- Park Avenue Lofts
- Park Center
- Park Central Building
- Park Central Mall
- Park Centre
- Park Centre West Corp
- Park Development Corp
- Park East Office Park
- Park Investment Co
- Park North Medical Ctr
- Park Place
- Park Place Business Ctr
- Park Place Ctr
- Park Place Lofts
- Park Plaza
- Park Plaza
- Park Plaza Co
- Park Plaza Medical Building
- Park Plaza Offices
- Park Plaza Properties
- Park Professional Building
- Park Sahara Office Ctr
- Park Side Towers Tenancy
- Park Square Bldg Office
- Park Terrace
- Park Tower
- Parkade Building Management
- Parkcenter 400
- Parkdale Office Complex
- Parkersburg Veterans Meml Bldg
- Parkland Plaza
- Parklawn Plaza
- Parkside Building
- Parkside Towers Co
- Parkview Office Tower
- Parkway Building Systems
- Parkway Business Ctr
- Parkway Commons
- Parkway Medical Ctr
- Parkway Professional Building
- Parkway Professional Ctr
- Parkway Professional Offices
- Parkway Properties Inc
- Parkway South
- Parkway Tower Office Bldg
- Parkway-Oakland General
- Parkwest Building Co
- Parlin-East One
- Parma Business Ctr
- Parnassus Heights Medical Bldg
- Partners In Radiology
- Pasadena Medical Building
- Pasadena Towers
- Pascagoula Professional Bldg
- Pasco Grand Corp
- Paseo Business Ctr
- Patriot Building Corp
- Pavilion Office Ctr LTD
- Pavillion 500
- Pax River Office Park
- PBMS Business Ctr
- Pe Lofts LLC
- Peabody Office Building
- Peachtree Lenox Bldg
- Pearl Building 10191 Corp
- Pearson Professional Ctr
- Pearson Professional Ctr
- Pearson Professional Ctr
- Pecos-Sunset Plaza Executive
- Peninsula Corporate Ctr
- Peninsula Professional Ctr
- Penn Center Building Mgmt
- Penn Park Office Complex
- Penn Plaza Assoc
- Pennington Co
- Pennyroyal Building
- PEO Solutions Co
- Pepsi-Cola Customer Svc Ctr
- Perkins Group Business Devmnt
- Permanente Medical/Dental Ofcs
- Permit Providers
- Perry Building & Supply Inc
- Perry Judd's Inc
- Petaluma Marina Business Ctr
- Peter Henderson Building
- Petro Plaza
- Petroleum Building
- Petroleum Building Inc
- Petroleum Center
- Petroleum Square II
- Petroleum Square II
- PGA Business Ctr LLC
- Phil Lenz Layer Building
- Philip D Mc Fadden Assoc LTD
- Philip White Building
- Phillips Point Management Ofc
- Philtower Building
- Phoenix Building
- Phoenix Capital Partners
- Phoenix Corporate Ctr
- Physicians & Surgeons Building
- Physicians Office Bldg Baptist
- Piano Works Management
- Pic Building
- Pickard Office Building
- Piedmont 14
- Piedmont Place
- Pierce Arrow Management Co
- Pierremont Executive Suites
- Pierremont Office Park
