In Arizona it is common for homeowners associations (HOA) to require homeowners or their contractors to obtain the HOA's permission to install a solar system. There is usually a minor fee. At least one HOA has taken this to an extreem, charging for an architect to review the plans and installation for $1500 ($500, to have an architect review plans, plus a $1,000 refundable deposit to ensure the installation happens as submitted.).
Tim Steller of the Arizona Daily Star has a good article on this situation: