Do Solar Panels Increase Home Value? What Studies Show

Key Takeaways

• The two most-cited studies agree on direction: Berkeley Lab measured buyer premiums near $4 per watt (~$15,000 typical); Zillow found 4.1% higher sale prices for solar homes.
• The premium belongs to owned systems. Leased panels are a contract the buyer inherits — often a closing complication, not an asset.
• Premiums track electricity savings, so high-rate states should sustain them best; both studies predate 2026, a caveat honest sellers should know.
• Many states exempt solar's added value from property tax — meaning the value shows up at sale, not on your tax bill.

What the research actually measured

The gold-standard study remains Berkeley Lab's "Selling into the Sun," which analyzed nearly 22,000 home sales across eight states — about 4,000 of them with photovoltaic systems. Its finding: buyers consistently paid more for homes with owned solar, a premium averaging around $4 per watt of installed capacity, roughly $15,000 for a typical system of the era. Zillow's later analysis of listing data reached a compatible answer from a different direction: homes with solar sold for about 4.1% more than comparable homes without.

Two results, different methods, same direction. That's about as good as housing research gets.

The fine print that changes deals

Ownership is everything. The premiums attach to systems the seller owns outright. A leased system or PPA is a monthly obligation with a counterparty; the buyer must assume the contract (and qualify for it) or the seller must buy it out at closing. Agents' war stories about solar complicating sales are overwhelmingly lease stories.

Premiums decay with system age. Berkeley Lab found the effect strongest for newer systems — sensible, since the buyer is purchasing remaining production years. A 20-year-old array is roof furniture; a 3-year-old one is a utility contract that pays the buyer.

The premium is a savings shadow. Buyers pay for panels because panels pay them back in avoided bills. That logic keys the premium to local electricity rates and export policy: a 33¢/kWh state's buyers rationally pay more than a 12¢ state's for identical hardware. Study-era national averages will overstate today's premium in cheap-power markets and may understate it in expensive ones.

The studies predate 2026. Both landmark analyses were conducted while the federal credit existed and rates were lower. No comparable post-repeal study exists yet. Direction is well-supported; treat any specific dollar figure — including the ones above — as an era-stamped estimate, not a promise.

Does solar raise property taxes?

In much of the country, no — by explicit exemption. Florida excludes 100% of residential solar's added value from assessment (Statute 193.624); Texas does the same via Tax Code §11.27, claimed with a one-page form filed with your county appraisal district. Dozens of states run similar exemptions; a handful don't. The combination — value at resale, invisibility to the assessor — is one of solar's quieter financial features, and it's state law, so check yours by name in DSIRE or your revenue department's site.

Practical playbook for sellers and buyers

• Selling with owned solar: document everything — installation date, system size in watts (the premium metric), production history from your monitoring app, transferable warranties. Price the premium into the listing deliberately; appraisers vary in solar literacy, and your file is what educates them.
• Selling with a lease: call the provider early, get the transfer and buyout numbers in writing, and decide before listing whether to clear the contract. Surprise is the enemy of closings.
• Buying a solar home: verify ownership status first, then ask for production data and the utility's export tariff. You're buying a small power plant; diligence it like one.

The bottom line

Owned solar is one of the few home improvements with peer-reviewed evidence of resale payback — alongside its monthly savings, not instead of them. The honest 2026 framing: the direction is solid, the magnitude is local and somewhat dated, and ownership structure decides whether the panels on the roof are an asset or an encumbrance. Own the electrons and the value follows the house.

Keep reading: whether solar is worth it · what solar saves · the best time to install.