New development requires infrastructure (streets, sewers, storm drains). Local governments are forced to require developers to put in the necessary regional infrastructure for new home developments. The developer then adds the cost of this infrastructure to the price of each new home. The homebuyer pays more for the home, therefore increasing the amount of the mortgage.
Many developers opt for establishing a Community Facilities Districts (CFD) so they can sell the homes at a lower price. Prior to the sale of the homes, they are the only “voters” in the CFD and thus have the power to create the district for future property owners. The CFD has the power to issue tax-exempt bonds to pay for the infrastructure. The cost is then passed on to the homeowner in the form of annual special taxes. Without the CFD, the homebuyer would probably pay more for the home resulting in a higher mortgage would also be paying higher property taxes on the increased cost of the home.