Most people renovate their homes for comfort or style. Ed Begley Jr. renovated with energy efficiency in mind, and the investment paid off. According to the Los Angeles Times, the actor bought a two-bedroom house in Studio City, California, in 1988 for $225,000. He has since turned the house into a showcase for solar panels, energy-efficient devices, and an early home car-charging station. The house sold for $1,025,000 in 2014. The renovations, the paper reported, show how energy-efficient upgrades can add value.From a 1936 fixer-upper to a working eco labThe house was not a cutting-edge model. It was a 1936 construction. Begley invested decades in it, making gradual improvements, rather than a radical overhaul. When he put it up for sale, the 1,586-square-foot home had a rooftop solar panel array, a sun-tracking panel on the side of the backyard structure, a fruit orchard, and a drought-resistant landscape. He began adding these features soon after buying the home in 1988, building on an environmental outlook that dated back to the first Earth Day in 1970. He kept expanding the project as his budget and the technology allowed. A complete overhaul of an existing home with solar panels, energy-efficient appliances, and a car charging station may be too much. But 26 years of gradual improvement is a feasible alternative.The reality show that turned a house into a household nameBefore its latest incarnation as a fixer-upper, the house was a TV star. It was the backdrop for the HGTV/Planet Green reality show "Living With Ed," which followed Begley and his wife, Rachelle Carson-Begley, as they tried to make their home as environmentally friendly as possible while still livable. The show ran from 2007 to 2010 and emphasized rain barrels, solar cookers, and composting, topics that have since become more common in home design.Ed Begley Jr., an advocate for sustainable and energy-efficient living. Image Credit: Wikimedia CommonsThe federal research behind solar's resale premiumBegley's sale price is consistent with findings from a major federal study of thousands of home sales. The Lawrence Berkeley National Laboratory completed a study for the U.S. Department of Energy, examining nearly 22,800 home sales, including almost 4,000 solar installations, in eight states, from 2002 to 2013. They found that buyers paid about $4 per watt installed, or roughly $15,000 more for a home with an owned solar photovoltaic system. That represents a decade of sales data, not just one market or one year.What EV charging adds to a home's sale priceNewer research on home EV charging follows the same pattern. A peer-reviewed study, "Effects of expanding electric vehicle charging stations in California on the housing market," published in Nature Sustainability analyzed about 14 million California housing transactions between 1993 and 2021. It found that homes within one kilometer of an EV charging station sold for an average premium of about 3.3 percent compared with homes without one nearby. That study measured proximity to public charging infrastructure, not private home chargers, so it does not directly describe Begley's setup. Begley had EV charging installed on his own property well before that infrastructure was common in most neighborhoods, putting him ahead of a trend that data now show can add value to a home.The quiet savings efficient appliances add every yearAppliances work differently than solar or EV charging. Rather than raising the resale price, efficient appliances lower monthly costs for as long as the owner stays in the home, making them another long-term investment alongside the home's solar and EV upgrades. According to the EPA's ENERGY STAR program, run jointly with the Department of Energy, households that choose ENERGY STAR certified products save about $450 a year on energy bills, on average. Over 26 years, that adds up to meaningful savings, separate from whatever the house eventually sold for.What this means for the next generation of home buyersPremiums for solar panels, electric car charging stations, and energy-efficient appliances vary by state, system size, and how established the local charging infrastructure is. However, the studies cited here suggest buyers may pay more for homes with these systems installed, depending on the market. Begley bought a normal 1936 house and made his upgrades over 26 years, rather than doing everything at once, and sold it for more than four times what he paid. This gradual upgrade strategy may appeal to millennials and first-time buyers considering a fixer-upper.