Photovoltaic systems of 10 kW or less installed on 1- or 2-family residential units are eligible for streamlined permitting and a fee reduction. PV projects can use a combined electrical and building permit instead of filling out two separate permits if the project meets certain installation and electrical requirements (as outlined on the combined permit form). In addition, electrical and building permit fees for all PV projects are reduced to $25 per $1,000 labor - lowered from the standard $25 per $1,000 of labor and equipment costs. This treatment was established by separate bills relating to electrical permits and building permits enacted in late 2011. Philadelphia has a Solar Installation Guidebook to assist residents and builders in Philadelphia through the process of obtaining the necessary permits and installing solar.