Providing temporary use of a non-downloadable web application for accounting in connection with building design and construction project management for public works and private construction projects, for submitting and approving change orders in connection with building construction projects, for recording work performed and costs of labor and materials incurred in connection with building construction projects, for generating applications for payment in connection with building construction projects, for generating invoices in connection with building construction projects, for generating progress releases in connection with building construction projects, for generating final releases in connection with building construction projects, for generating reports in connection with building construction projects, for generating notices in connection with building construction projects, for generating cost summaries in connection with building construction projects, for importing and processing data from documents relating to building construction projects, and for coordinating data entry by multiple persons in connection with building construction projects; Providing a web site featuring temporary use of non-downloadable software for recording construction project job costs and profit margins, for certifying the completion of phases of building construction projects, for generating requests for payment in connection with building construction projects, and for processing accounts payable in connection with building construction projects