Homeowners with paid-off rooftop solar generally see a sale-price premium, but a leased system can complicate a sale. Zillow’s 2019 analysis found that homes with solar sold for 4.1% more on average than comparable homes without it, which was about $9,274 for the median-valued home at that time. A Lawrence Berkeley National Laboratory (LBNL) study found that buyers paid about $4 per watt, roughly $15,000 for an average 3.6 kW system. The size of the effect in your market depends on who owns the system, how old it is, and what local buyers value.
Two caveats matter. First, both studies are several years old, and the housing market, solar prices and incentives have changed since then. Second, they mostly describe homes with owned systems. Leased systems and power purchase agreements (PPAs) work differently in a sale, as covered below.
This guide summarizes what the research shows, when solar helps a sale, when it can slow one down, and what to do before you list. It is general information, not appraisal, tax or legal advice.