Do Solar Panels Increase Home Value in Massachusetts?

One of the first questions I get asked when sitting down at a kitchen table is whether this investment will actually pay off if the house is sold in a few years. It is a smart question. Homeowners want to know if putting panels on the roof is like remodeling a kitchen, where you get the money back at resale, or if it is just an expense that disappears.

The honest answer is yes, solar does add real, measurable value to homes in Massachusetts. But not every homeowner realizes how the math actually works, what the state-specific rules are, or why some systems add far more value than others.

I am Dave Simmer, a NABCEP-trained solar professional based in Scituate. Since 2011, I have designed and overseen over 1,800 residential solar installations across the South Shore. I have seen homes with my systems sell, I have talked to the real estate agents involved, and I know how the local market views this technology. Here is the straight truth about solar and home resale value in our area.

The Short Answer: Yes — But Here's What Actually Drives the Number

National studies from organizations like the Lawrence Berkeley National Laboratory consistently show that homes with owned solar systems sell for a premium. On average, that premium sits between 3% and 5% of the home's total value. When you apply that percentage to median home prices on the South Shore, you are looking at a significant dollar amount. For a home valued at $800,000, a 4% premium translates to an additional $32,000 at the closing table (see how much does solar cost in Massachusetts?).

That number aligns closely with the initial cost of a properly sized solar installation, meaning you essentially recover your upfront investment in the equity of your home. But there is a massive caveat that you need to be aware of: this only applies to systems that you own outright or have financed through a loan.

Leased systems do not add value in the same way. When you lease panels, a third-party company owns the equipment on your roof. When you sell the home, the buyer has to agree to take over the remainder of your lease contract. While some buyers are perfectly happy to do this to get cheaper electricity, others view it as an encumbrance or a liability. If you want to build equity that translates to resale value, you need to own the system.

Buyer perception matters immensely here on the South Shore. We live in a state with some of the highest electricity rates in the continental United States. When a buyer is looking at two identical houses, and one comes with a $300 monthly electric bill while the other comes with a $15 monthly electric bill because the solar is paid off, the math is obvious. The home with solar offers a lower monthly cost of living, which justifies a higher purchase price. That financial reality is what drives the premium.

The Massachusetts Property Tax Exemption — An Underrated Benefit

When you make a significant improvement to your home—like adding a master suite, finishing a basement, or remodeling a kitchen—your town assessor takes notice. Your home's assessed value goes up, and your annual property tax bill goes up right along with it. This is a hidden cost of most home renovations that homeowners rarely factor into their budgets.

Solar is different in Massachusetts. State law explicitly exempts the added value of a solar energy system from your property taxes for a period of 20 years (see the full Massachusetts solar incentives guide).

In practice, this means you get the best of both worlds. The market value of your home increases because buyers are willing to pay more for a house with low utility bills. But your town cannot tax you on that increased value. If your solar system adds $30,000 to the resale value of your property, your property tax bill remains exactly what it would have been without the panels.

This is especially meaningful in South Shore towns like Hingham, Cohasset, and Duxbury, where property tax rates are already a significant part of the annual household budget. It is one of the few home improvements you can make that builds equity without increasing your tax burden. Understanding how the state protects this investment is key to seeing the full financial picture.

What Appraisers Actually Look At

When a buyer makes an offer on your solar-equipped home, their bank will send an appraiser to determine if the house is actually worth the agreed-upon price. Appraisers have specific methodologies for valuing solar panels in Massachusetts, and they do not just guess based on how the panels look.

Appraisers typically use one of two methods. The first is the income approach. They look at the amount of electricity the system produces annually, calculate what that electricity is worth based on current National Grid or Eversource rates, and project that value over the remaining lifespan of the system. The second method is the cost approach, where they look at what it would cost to install a similar system today, minus depreciation for the years the system has already been operating.

For an appraiser to add value, the system must be owned, properly permitted, and fully grid-connected. As a seller, you need to make their job easy. You should have a folder ready containing your original installation contract, proof of ownership or loan payoff, your municipal building and electrical permits, and the interconnection agreement from the utility.

You should also include documentation showing your enrollment in the SMART program (read the SMART program guide), if applicable, and a year's worth of utility bills demonstrating the net metering credits the system generates. When you hand an appraiser hard data proving the system eliminates a $3,000 annual utility expense, it is very difficult for them to ignore that value in their final report. Having your paperwork organized is what turns potential value into appraised value.

Does Solar Help You Sell Faster?

Beyond the final sale price, homeowners often wonder if solar makes a house easier to sell. The data and anecdotal evidence from the South Shore suggest that it does, provided the system is owned and marketed correctly.

Buyer appetite for energy efficiency has grown dramatically. Real estate platforms like Zillow and Realtor.com now allow buyers to filter searches specifically for homes with solar panels or energy-efficient features. By having solar, your home shows up in these targeted searches, attracting buyers who are specifically looking to avoid high utility costs.

I have spoken with local real estate agents who highlight the solar system in their listing descriptions right alongside the renovated kitchen and the proximity to the commuter rail. In a high-electricity-cost state like ours, telling a young family that they will not have to worry about summer air conditioning bills or winter heating spikes is a massive selling point. It removes a layer of financial anxiety for the buyer.

It is important that buyers understand how seamless the transition is. The net metering agreement you have with National Grid or Eversource transfers directly to the new owner with the property (learn how net metering works). They step right into your shoes and start receiving credits for the power the system produces from day one. Making sure the buyer's agent understands this process helps the home sell faster and prevents confusion at the closing table.

When Solar Doesn't Add as Much Value

I promised you honest numbers, which means I have to tell you when solar does not add the value you might hope for. Not every system is a gold mine at resale.

As mentioned earlier, leased systems are the biggest hurdle (see leasing vs. buying solar in Massachusetts). Because you do not own the equipment, you cannot sell it. You are transferring a contract, not an asset. If a buyer does not want to take over the lease, you may be forced to buy out the remainder of the contract yourself in order to close the sale, which directly reduces your net proceeds.

Age is also a factor. If you are selling a home with a system that is 20 years old, buyers know that the inverter will likely need replacing soon and the panels are nearing the end of their warrantied lifespan. An older system still provides value by generating electricity, but an appraiser will heavily depreciate it, and buyers will not pay a premium for aging technology.

Finally, poor design hurts resale. If a company installed an undersized system on a heavily shaded roof, it will not generate enough electricity to meaningfully offset the utility bill. When a buyer asks to see the electric bills and realizes the solar panels are only covering 20% of the home's usage, the premium vanishes. A system only adds value if it actually performs. This is why getting the design right on day one is so important for the long-term financial picture.

South Shore Towns Where Solar Value Is Especially Strong

The impact of solar on home value is amplified in specific markets, and the South Shore happens to be one of them. The math simply works better here than in many other parts of the country.

In towns like Scituate, Hingham, Cohasset, and Duxbury, median home prices are high. Because the solar premium is often calculated as a percentage of the total home value, a 3% or 4% increase on a high-value home results in a larger absolute dollar figure.

Furthermore, these towns are served by National Grid and Eversource, where we see some of the highest residential electricity rates in the state. The higher the cost of grid electricity, the more valuable the solar electricity becomes. A buyer in Plymouth or Norwell looking at a $400 monthly electric bill will place a much higher value on a solar system than a buyer in a state where electricity is cheap. The combination of strong real estate values and expensive utility rates creates the perfect environment for solar to maximize its return on investment at resale.

The Bottom Line

If you own your solar system outright, or if you purchased it through a loan, it adds real, measurable value to your Massachusetts home. The data supports it, appraisers recognize it, and buyers are willing to pay for it.

The Massachusetts property tax exemption ensures that you get to keep that added equity without paying higher taxes to your town. But remember that the value is entirely dependent on the system actually working well. A properly designed, well-installed system using quality equipment will yield a much better return at the closing table than a cheap system that underperforms.

If you are thinking about the long-term value of your home and want to see how the numbers would look for your specific roof, I am happy to run a design for you. No pressure, no sales tactics, just the honest math.

Want to understand what the system actually costs before you think about resale value? Read my guide on How Much Do Solar Panels Cost in Massachusetts?

Or ready to see what a system would cost?