The report details the process of creating a property marketing system, Spaces, for commercial real estate property owners and leasing agents. The system has been developed alongside a startup company, Objektia, in conjunction with their efforts to strengthen their product offerings by providing property marketing as a service. Spaces delivers an easy to use tool for everyday work tasks of the leaser, including creation of unique advertising, supply management, customer relationship management tools and lastly marketing analysis tools. The goal of Spaces is to enable leasers to attract more and better tenants, through high conversion advertising and subsequently improve the sales process through enhanced customer relations. The report describes theory regarding the commercial real estate market and web applications, the agile development process of Spaces, and how the end result will be used by leasers and marketed as a real world application to customers through Objektia. It is concluded that using these methods, a conceptual system and a promising product is created with capabilities for future real world implementation with Objektia.