Managing commercial real estate property by providing access to multiple commercial real estate services using an on-line property management environment. The on-line property management environment comprises a distributed computer network, such as the global Internet, coupled to numerous clients, a property services server platform connected to a local database, and numerous property information databases. The on-line property management environment improves the efficiency and effectiveness of commercial real estate transactions by providing a Web site that can serve as a commercial real estate professional' s workspace to obtain industry specific content, use support tools, benchmark performance, and access vendors in a personalized environment. The Web site can facilitate the offering of multiple services relating to the property management including site appraisal, engineering, and environmental services in an on-line computing environment such as the global Internet.