Horizon's dedicated technician will visit the property to confirm the system design, verify measurements, and adjust for shade and obstructions on roof. After the site evaluation, a solar design expert will make any number of adjustments to the customized plan to ensure everything looks and operates perfectly. From site visit to design, it can take between 3 to 5 weeks. After design plans are finalized, they will be submitted by Horizon to the local city government Authority Having Jurisdiction (AHJ) for permitting. Permit approvals are subject to schedule of the governing AHJ Department. This can take anywhere from 2 to 8 weeks.