The present invention relates to completing a lease for property in an on-line computing environment. A distributed computer network can enable a user to access multiple databases and to obtain comparables data related to a property of interest for use in calculations. This can enable users to access the latest, broadest set of relevant property data and to select relevant comparable values quickly and with minimal manual intervention. An on-line property management environment can comprise a distributed computer network coupled to numerous client computers, a property services server platform connected to a local database, and numerous property information databases. Building owners or their agents can list their available space for rent on a web site hosted b (a property services server platform in a distributed computing environment. Commercial tenants or their agents requiring space can either directly enter the property services server platform or enter through allied sites.