Creates the Solar-Ready Buildings Act. Requires all building permits issued 90 days after the effective date of this Act in a new, large multifamily residential building or a large multifamily residential building being renovated by a developer converting the property to an association to be built to accommodate the installation of a solar energy system on the roof. Requires all building permits issued 24 months after the effective date of this Act to accommodate the installation of a solar energy system on their roofs in new construction single-family residence or small multifamily residence that qualifies as an affordable housing development under the same project ownership and is located on a campus to be built to accommodate the installation of a solar energy system on their roofs. Requires that unless provided otherwise in this Act, all new residential and commercial buildings shall be built to accommodate the installation of an on-site solar energy system with preference for rooftop solar energy systems. Authorities shall develop and adopt amendments to their respective building codes within one year from the effective date of this Act to establish this requirement. Makes specific requirements for a solar energy system to produce electricity. Makes exemptions for developers in certain situations. Any person who fails to comply with or otherwise violates this Act is liable for a civil administrative penalty not to exceed $10,000 for each violation, or twice the estimated additional cost that would have been incurred by constructing a building to meet the requirements of this Act, whichever is greater. Applies to new buildings constructed after the effective date of this Act.