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The week’s hottest real estate listings, ranked by climate risk.

Glued to real estate posts on The New York Times, The Wall Street Journal, Dwell, Spaces, The Modern House, or Architectural Digest and wondering how those gorgeous homes will hold up in the next decades? I have you covered.
Heatmap has partnered with my new climate risk platform, Habitable. Every Friday, we add a climate risk score to the real estate listings featured in the news this week and ask: Could you live here as the climate changes?
Using a model developed by a team of Berkeley data scientists at Climate Check, Habitable scores each property for heat, flood, drought, and fire risk on a scale of 1-10. One represents the lowest risk and 10 is the highest. Our rating for each hazard is based on climate change projections through 2050. (You can check your own home’s climate risk here.)
For today’s edition, I apply the Habitable Index to waterfront homes featured in the news this week. Is it possible to live on the water without going under. Will Bill Koch unload his Cape Cod ‘peninsula’ (and if you buy that, he’s got more swampland in Florida to sell)? And will Malibu surfers have to wave goodbye to The Wave house ?

This modernist home designed by architect Serge Chermayeff is for sale on 2.32 acres in the pines of Wellfleet, home to an exclusive community of cottages where the elites of modern architecture summered together in the 1950s and ‘60s. Marcel Breuer, Serge Chermayeff, Walter Gropius, Constantino Nivola, the Saarinen family, Florence and Hans Knoll, their friends and clients all had homes or rented summer cottages here.
Only a short walk to the most swimmable ponds and to Newcombe Hollow Beach, this house is fantastically sheltered and absolutely habitable with barely a climate risk. Featured @thecreativesagent and listed for $2,895,000.

Hummingbird House on Seattle’s Lake Union is for sale. This waterfront houseboat is conveniently located directly across the lake from the houseboat where Tom Hanks lived in Sleepless in Seattle. The three-bedroom home is named after the hummingbirds who nest each spring on one of the several outdoor decks. The birds don’t need to worry about being uprooted because the climate risk here is minimal — no fire, low heat and drought risk. The flood risk is 7/10, which would normally be worrying, except this house sits on a floating dock and will rise and fall with the seiches. Seems okay. Sugar water all round!
Featured in SFGate and listed for $1,995,000.

An unexpected and very habitable beachfront home on Vineyard Sound in Woods Hole is for sale. Interiors have custom cabinetry throughout and large, light open rooms with sweeping views to the beach and across to Marthas Vineyard. Perfect for a four-season beach getaway, the house has its own private beach and jetty with surprisingly moderate flood risk — 5/10 — considering the great location.
Featured in Dwell and listed for $5,999,000.
Bill Koch, the 83-year-old billionaire, has put 11 vacant acres of his Osterville estate on the market for a combined $16 million. Koch told the Wall Street Journal that he has decided to sell the vacant lots ‘because real-estate values have appreciated, and he doesn’t need the property.’ Buyer beware: Of the two batches of land on the available 11 acres, the parcels at the SeaPuit address have 7/10 flood risk. The Indian Trail parcels have no flood risk.
As seen in WSJ and listed for a combined $16 million.

Frank Lloyd Wright’s architectural masterpiece on 14 acres of protected land in New Canaan, Connecticut, is for sale. He lived here when he was building the Guggenheim museum
Yes, it would be a dream to live here. This is a house that requires you to live up to its architectural magnificence — a 15-room horseshoe-shaped house cantilevered over a pond and waterfall with a greenhouse, guesthouse, and bridge to a nearby river. And yet, it is also a house that would crush your soul when it inevitably floods, which, sadly, it is likely to do. Just writing that is crushing.
Featured in Mansion Global and listed for $8 million.

What’s more unbelievable — that Middlesea, Billy Joel’s just-listed waterfront estate on 26 acres on Oyster Bay Harbor has a bowling alley, helicopter pad, two pools, an extra beach mansion with floating dock, boat ramp, and a beauty salon (but only 5 bedrooms?). Or that the place is unhabitable for almost $50 million? Extreme flood risk is guaranteed on the 2,000 feet of waterfront. Just say no.
Featured in WSJ and listed for $49,000,000.
Surfer and architect Harry Gesner’s family home is on the market for the first time. The visionary designer, best known for the house he built next door — The Wave House — lived in his dream home, called Sandcastle, from when he built it in 1974 until last year when he died at age 97. With 122 feet of beachfront on Gesner’s favorite surf break, Sandcastle was built with love and a lot of salvaged lumber and old telephone poles. There are some insane details including a tree house, spiral driftwood stairs, an enormous arched hearth, and … portholes? Where am I? Soon, (sadly) under the sea or burnt to the ground.
Featured in @takesunset and listed for $27,500,000.

It must be the week for offloading surfer-architect Henry Gesner houses. The Wave House is the house Gesner was most famous for, right next door to Gensler’s own home.
But the homes are polar opposites. The Wave House is light and airy inside. It has no dark wood, only wide open white spaces with undulating rooflines — more Jetson than Sandcastle’s Swiss Family Robinson.
Legendary record executive Mo Ostin, bought the house in 1987 and lived here until he died last year at age 95. But imagine the parties? His artists included Frank Sinatra, Jimi Hendrix, Joni Mitchell, The Who, Fleetwood Mac, and Prince. The Wave House’s best days may also be behind it, considering the extreme drought, flood, and fire risk. Truly, it is the end of an era.
Featured on the Dirt and listed for $50 million.
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Lunar Energy’s latest AI-powered system aims to integrate EVs into the automated demand response mix.
In theory, it’s straightforward to assemble the smart energy home: Solar panels, home backup batteries, and electric vehicles, plus smart thermostats, heat pumps, and water heaters — all the individual pieces can be had for the homeowner who can afford the up-front cost. The challenge is getting all those pieces to talk to one another.
Bay Area-based Lunar Energy is one of the tech firms that’s been trying to crack this problem. Today, it announced an upgraded version of its artificial intelligence-powered home energy control system, which not only integrates all those separate systems but also responds tactically to energy markets. CEO Kunal Girotra told me Lunar AI saves its users money by monitoring their home 24/7 and making decisions to charge, not to charge, or discharge so that they save the most money.
“Utilities are all moving to almost-real-time changes of rates,” he said. “You need software to handle that for you. I think that the race is on for who has the best AI machine learning algorithms to save the most amount of money. And so far, we seem to have a head start.”
Lunar’s first-generation system focused on generation, storage, and control. In other words, it connected elements like a home’s rooftop solar panels with the backup battery the residents might keep in the garage, using the AI to decide when to meet the home’s real-time energy needs with solar versus grid energy versus stored power. What it didn’t have was the ability to work with electric vehicles to manage charging and use the car’s battery as a bonus source of energy.
To fix this, Lunar has built its own bidirectional EV charger — one that can charge up the battery or discharge the car’s battery for a secondary use, like backing up the home’s power supply. Girotra, formerly the head of Tesla Energy, told me the problem with that functionality to this point has been the connection point between the car and the home electrical system. Carmakers and other companies in the space didn’t have the deep experience with electrical certifications to make the process seamless, he tells me. That led to setups like the original Ford Charge Station Pro, which required several different wall-mounted electrical boxes to connect the F-150 Lightning EV to the home.
Lunar’s charger is built to connect to its customers’ existing home Lunar energy system, which includes a microgrid interconnect device they call Lunar Bridge that islands the home in case of a power outage on the grid. In that way, the power stored in the EV battery is ready to back up the home in case of a blackout without any additional work — or to be optimized as part of a fully smart home that’s making money as part of a virtual power plant.
The company’s setup allows for another fun feature: “slow” charging that’s not slow at all, but actually two or three times as fast as the Level 2 charging most EV owners use to recharge their batteries overnight. Electric cars in the U.S. can typically take on only about 11 kilowatts of AC power from one’s home because of the limitations of their on-board hardware. Because Lunar’s system is fully DC, however, Girotra said the company decided to build a DC home charger, one that — like a Tesla Supercharger or other DC fast chargers out in the world — isn’t limited by that power cap. Lunar said it could use a combination of power from the grid, home solar, or home batteries to charge an EV at up to 25 kilowatts. That’s enough to recharge an EV in three to four hours rather than six to eight.
“If the standards get high, and if everybody sees cars can get charged in three hours, then all of a sudden people are like, ‘Wow, this is how I want it,’” he said. “Especially for 25% of the users who are like me, who always are running low on charge and they don’t mind a boost every now and then.”
Some of the other improvements in the second-gen system are more incremental. An inverter that’s 40% more powerful helps Lunar get its system up to enterprise scale. That’s crucial, as the world moves toward a place where more homes and businesses employ battery backup systems. Lunar’s new batteries come in modular 5 kilowatt-hour blocks ranging from 10 kilowatt-hours to 30 kilowatt-hours in a single unit and scale up to 300 kilowatt-hours for home or small commercial use; there’s also new pad-mounted configurations with capacity up to 1 megawatt-hour.
Batteries, though, are the simple part. Everyone from EV makers like Rivian to utilities like Octopus Energy is racing to make a person’s or a business’s batteries and solar panels and electric cars work for them, using the power of AI to account for moment-to-moment changes in energy prices and supply. Lunar’s new tech makes the case that the most important element is a single brain to integrate every last smart, electrified thing in your house.
The fundraise comes on the heels of a $50 million grant from the Department of Energy.
Almost all lithium-ion batteries on the market rely on graphite for their anodes, more than 90% of which is processed in China. That concentration has created a chokepoint in the Pentagon’s supply chain as the military increasingly turns to batteries to help its transportation network operate more quietly and reduce reliance on complex refueling logistics.
So when Congress passed the latest National Defense Authorization Act at the end of 2025, barring Chinese-linked battery materials from military use starting in 2028, Coreshell saw an opening. While the California-based silicon-anode battery startup had previously focused on automakers as its beachhead customers, it’s now shipping its first battery cells to the military for use on Navy ships and Army ground vehicles. On Wednesday, Coreshell announced a $30 million Series B to scale up manufacturing operations to meet the needs of this growing customer base.
“We’re entering a new stage where we’re no longer, I would say, demand limited,” Coreshell’s CEO Jonathan Tan told me. “This year we’ve had to put on second and third shifts, work nights and weekends, just to get the product out the door.”
Coreshell sets itself apart by going a step further than the NDAA requires. The law doesn’t make suppliers trace battery materials all the way back to the mine, which would be exceedingly difficult given China’s dominance across the battery supply chain. But Coreshell has nevertheless eliminated Chinese sourcing from its anodes by replacing graphite with silicon mined and refined in the U.S. by Ferroglobe, one of its Series A investors.
Ferroglobe and global investment firm Access Industries led the latest round, with defense contractor ADS also joining as a new strategic investor. The financing comes on the heels of a $50 million Department of Energy grant that Coreshell secured in August as part of a program to strengthen the domestic battery supply chain. That funding will support the company’s first commercial-scale facility, a 2-gigawatt-hour factory.
That’s about 20 times the size of the 100-ish-megawatt-hour plant the startup had originally envisioned, as the DOE grant has allowed Coreshell to “expand much further than we were originally expecting,” according to Tan. The company is now evaluating several potential U.S. sites and expects to announce its selection early next year. For now, it relies on unnamed contract manufactures, along with its small pilot line in San Leandro, to produce its cells. But once the gigafactory gets up and running, the startup plans to bring electrode production in house by 2028, followed by full cell assembly in 2029.
Building this plant will ultimately require significant additional capital. But Tan believes this latest vote of confidence from the federal government will help Coreshell to diversify its capital stack as it continues to fundraise. “That’s one of the great things about having such a notable DOE award is that it also allows us to attract multiple forms of capital,” he told me.
Silicon has long been recognized as a promising alternative material for battery anodes, as it can store far more energy than graphite. The catch is that it tends to swell during charging, causing it to break down quickly and ultimately leading to a much shorter cycle life. Coreshell says it’s extended its anode’s lifespan by giving it a proprietary coating, which Tan told me back in April essentially means “painting the inside of your battery” with an ultra-thin protective layer.
Other companies, such as Sila Nanotechnologies and Group14 Technologies, are also working to commercialize silicon anodes. But Coreshell says many of its competitors rely on more highly engineered, expensive forms of silicon, such as silane gas. By contrast, Coreshell uses metallurgical silicon, a cheap, raw commodity already widely used in aluminum alloys. That, Tan argues, gives the company a cost advantage not only over its competitors, but potentially Chinese graphite too.
Coreshell hasn’t yet demonstrated that its cells can meet the performance demands of the automotive industry, however. When the company raised its Series A in early 2025, it said it expected its automotive cells to exceed 1,000 charge cycles while retaining 80% of their original capacity. But Tan told me many defense applications don’t require such demanding performance targets, as Navy ships and ground vehicles are “not intending to have as many miles or missions or use cases on that same battery” as a consumer EV would.
That doesn’t mean the company is abandoning its automotive ambitions. As Tan pointed out, electric vehicles remain by far the largest source of global and domestic battery demand. “It’s natural for us to obviously utilize the security supply chain first,” he told me. “That allowed us to really get to commercialization, revenue, and production faster, because automotive qualification is this longer journey. But ultimately, we want to do both of those and more.”
Current conditions: A large storm is roaring across the Northeast that will shower Michigan and Upstate New York with rain and snow by tomorrow • AccuWeather declared an early end to the 2026 Atlantic hurricane season, which saw 10 named storms and only one hurricane in October, breaking a 121-year record for the latest first hurricane • It’s a mild, cloudy day at the Rethondes Clearing in France’s Forest of Compiègne, where the armistice that ended World War I was signed 108 years ago today.
Inflation is ticking up again, and faster than expected. That’s my colleague Matthew Zeitlin’s read on the latest numbers from the Bureau of Labor Statistics. Preliminary data from Heatmap and MIT’s Electricity Price Hub shows that electricity prices in particular spiked nearly 8% to 19.9 cents per kilowatt-hour in October from 18.5 cents in the same month last year. But that’s largely due to a change in the timing of a bill credit in California. Without that, the year over year price jump was just under 4%.

Ontario Power Generation, the state-owned utility in Canada’s most populous province, admitted in a public filing Wednesday that its megaproject to build the first small modular reactor in the rich world is costing a lot more than planned. The company is constructing the world’s first BWRX-300, the flagship reactor from GE Vernova Hitachi Nuclear Energy, at its Darlington plant. The project is an attempt to revive construction of atomic power stations in North America, Europe, and Japan by building the inevitably costly first-of-a-kind unit that can then be replicated at what the developers say will be a decreasing price. Using billions in Canadian ratepayers’ money to essentially de-risk an American-Japanese technology ruffled some feathers among the country’s nuclear boosters, who told me last month they want to see Ottawa approve construction of more of the Canucks’ homegrown reactor. In its latest earnings report, OPG said the BWRX-300, known as DNNP Unit 1, “is no longer expected to achieve the previously disclosed commercial operation date target of October 2030 or be completed with the previously disclosed estimated cost of $7.7 billion.”
Amid a flurry of funding cuts in the early days of the current Trump administration, the Department of Energy canceled an $87 million grant to the green cement startup Sublime Systems. In response, the company sued for damages. This week, the Somerville, Massachusetts-based firm filed legal documents accusing the agency of “refusing to comply with its basic discovery obligations and the schedule” for the case.
“The government has repeatedly delayed responding to Sublime’s discovery requests, and now the government is refusing to even meet and confer with Sublime until some indefinite date in the future,” read the joint status report filed with the U.S. Court of Federal Claims. “The upshot is that, as of today, the government has not produced a single document in response to Sublime’s requests for production (served nearly two months ago), it has provided no timeline by which productions will be completed, and it is refusing to search for core documents related to the May 2025 mass termination at the heart of this case.”
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The Energy Department’s Office of Energy Dominance Financing, formerly the Loan Programs Office, closed a $480 million loan for a Texas-based company’s effort to modernize and boost production from 22 offshore oil and gas platforms in the Gulf of Mexico. Arena Energy, the Woodlands, Texas-based company behind the initiative dubbed Project Elkhorn, said that the initiative will add 38,600 barrels of oil per day and up to 77 million cubic feet of natural gas per day to U.S. energy output.
“The United States is the world’s largest producer and exporter of oil and natural gas, and thanks to President Trump, American energy production will continue to grow,” Secretary of Energy Chris Wright said in a statement. “By providing financing for projects like Project Elkhorn, the Energy Department is expanding domestic production and strengthening our energy security to power American prosperity for decades to come.”
QuantumScape emerged years ago as the frontrunner in the race to commercialize solid-state batteries that last longer, charge more quickly, and function better under harsh conditions than liquid-based lithium-ion packs. On Wednesday, the San Jose, California-based startup unveiled what it called in a press release its “next-generation open platform for all-solid-state batteries.” Dubbed Osprey, the cells “deliver the world’s first public data demonstrating a sulfide-based cathode cycling 1,000 times under just one atmosphere of pressure.” In other words: “an unmatched capability that is necessary for automotive solid-state batteries.”
“Osprey is a next-generation platform that is built on our same core technology, the ceramic separator and anode-free design,” Siva Sivaram, QuantumScape’s chief executive, told me in an email last night. “It will allow us to provide the unique benefits of our ceramic separator to developers of all-solid-state batteries using sulfide-based cathodes.” The company plans to start mass producing its cells in 2028, he said.
Bill Gates boasts that he has committed more of his fortune to fighting climate change than virtually any other rich man in the world. But a new investigation by ProPublica found that he’s ramped up his investments in a landfill company, Republic Services, that spews millions of tons of greenhouse gases into the atmosphere. “It seems very likely that Bill Gates has the power to influence Republic’s behavior to make it more climate-friendly, even if that costs the company profits,” Ann Lipton, a legal scholar who studies corporate governance at the University of Colorado, Boulder, told the outlet.