London Daily

Focus on the big picture.
Wednesday, Oct 22, 2025

A Striking Cor-Ten Steel Home in Sonoma

A Striking Cor-Ten Steel Home in Sonoma

Designed by Mork-Ulnes Architects, the Triple Barn House is a rustic retreat made of glass, concrete, and steel.

Perched on a six-acre parcel just minutes from downtown Sonoma, California, is a steel-clad dwelling known as the Triple Barn House. The two-level home was built in 2016 by San Francisco–based Mork-Ulnes Architects for a couple seeking to reconnect with nature.



Dressed with Cor-Ten steel, the triple-gabled roof divides the 1,750-square-foot home into three zones: a workshop, a retreat, and a forum. A large concrete base holds the carport and main entryway.

Inspired by the area’s rural building typologies, the firm wrapped the home in metal cladding reminiscent of the iron-red soil found at the hillside site. "We chose Cor-Ten steel as the cladding material for its natural resistance to fire, as well as its resonance to agricultural buildings of the Sonoma Valley," says Casper Mork-Ulnes, the firm’s founder. "The natural soil of the Sonoma hillside is very iron rich, which gives it a rusted color, making the house tie back to earth."



Upon arrival, a broad, sculptural staircase leads to the main living areas on the upper level.



Expansive glazing invites ample natural light inside while capturing views of Sonoma’s rolling hills, forests, and farms.

Inside, crisp white walls present a stark contrast to the home’s rustic red exterior, and large picture windows and floor-to-ceiling glazing further enhance the light-filled atmosphere. In total, the dwelling spans 1,750 square feet, with spacious living areas connected by an open layout. Sliding glass doors open the professional-grade kitchen to a large, partially shaded outdoor area that frames captivating views.



Douglas fir floors add warmth to the home’s neutral palette.



The main dining area is located just steps from the bright, airy kitchen.

"My favorite feature is the way it feels like one continuous room, yet at the same time there are three zones existing under three roofs, each serving a different function," Mork-Ulnes notes.

In addition to free-flowing living spaces, the home has three bedrooms, two-and-a-half baths, and a double-height office and a bonus room on the lower level. Wooded trails weave around the property, offering many opportunities to enjoy nature.



As a chef and food educator, one of the current owners has used the open kitchen as a laboratory for healthy meals to inspire her job teaching. When planning the home, they sought to craft a space where they could "prep food together while also being able to move freely and smartly."



A large pantry sits off the kitchen, offering plenty of storage space.

"The house turned out to be more private than we expected," says one of the current owners. "It truly is a hideaway. It feels like we are in a world away from the hustle and bustle." Scroll ahead to see more of the residential retreat, now listed for $2,995,000.



An expansive cantilevered eave creates an extension of the kitchen with an outdoor bar and grilling/seating area. A thriving garden lies nearby.



Another lounge area, which the owners refer to as a forum, is located in the heart of the home, between the main living spaces and the primary suite.



The primary bedroom presents a quiet, calming environment, complete with picturesque views.



A Jack-and-Jill bathroom connects the additional two bedrooms, also sited on the upper level.



On the lower level, the concrete-clad office features a separate entrance. The space could also serve as a gym or artist’s studio.



Once the sun sets, the private side deck with soaking tub offers an idyllic setting for stargazing.


Newsletter

Related Articles

0:00
0:00
Close
US Administration Under President Donald Trump Reportedly Lifts Ban on Ukraine’s Use of Storm Shadow Missiles Against Russia
‘Frightening’ First Night in Prison for Sarkozy: Inmates Riot and Shout ‘Little Nicolas’
White House Announces No Imminent Summit Between Trump and Putin
US and Qatar Warn EU of Trade and Energy Risks from Tough Climate Regulation
Apple Challenges EU Digital Markets Act Crackdown in Landmark Court Battle
Nicolas Sarkozy begins five-year prison term at La Santé in Paris
Japan stocks surge to record as Sanae Takaichi becomes Prime Minister
This Is How the 'Heist of the Century' Was Carried Out at the Louvre in Seven Minutes: France Humiliated as Crown with 2,000 Diamonds Vanishes
China Warns UK of ‘Consequences’ After Delay to London Embassy Approval
France’s Wealthy Shift Billions to Luxembourg and Switzerland Amid Tax and Political Turmoil
"Sniper Position": Observation Post Targeting 'Air Force One' Found Before Trump’s Arrival in Florida
Shouting Match at the White House: 'Trump Cursed, Threw Maps, and Told Zelensky – "Putin Will Destroy You"'
Windows’ Own ‘Siri’ Has Arrived: You Can Now Talk to Your Computer
Thailand and Singapore Investigate Cambodian-Based Prince Group as U.S. and U.K. Sanctions Unfold
‘No Kings’ Protests Inflate Numbers — But History Shows Nations Collapse Without Strong Executive Power
Chinese Tech Giants Halt Stablecoin Launches After Beijing’s Regulatory Intervention
Manhattan Jury Holds BNP Paribas Liable for Enabling Sudanese Government Abuses
Trump Orders Immediate Release of Former Congressman George Santos After Commuting Prison Sentence
S&P Downgrades France’s Credit Rating, Citing Soaring Debt and Political Instability
Ofcom Rules BBC’s Gaza Documentary ‘Materially Misleading’ Over Narrator’s Hamas Ties
Diane Keaton’s Cause of Death Revealed as Pneumonia, Family Confirms
Former Lostprophets Frontman Ian Watkins Stabbed to Death in British Prison
"The Tsunami Is Coming, and It’s Massive": The World’s Richest Man Unveils a New AI Vision
Outsider, Heroine, Trailblazer: Diane Keaton Was Always a Little Strange — and Forever One of a Kind
Dramatic Development in the Death of 'Mango' Founder: Billionaire's Son Suspected of Murder
Two Years of Darkness: The Harrowing Testimonies of Israeli Hostages Emerging From Gaza Captivity
EU Moves to Use Frozen Russian Assets to Buy U.S. Weapons for Ukraine
Europe Emerges as the Biggest Casualty in U.S.-China Rare Earth Rivalry
HSBC Confronts Strategic Crossroads as NAB Seeks Only Retail Arm in Australia Exit
U.S. Chamber Sues Trump Over $100,000 H-1B Visa Fee
Shenzhen Expo Spotlights China’s Quantum Step in Semiconductor Self-Reliance
China Accelerates to the Forefront in Global Nuclear Fusion Race
Yachts, Private Jets, and a Picasso Painting: Exposed as 'One of the Largest Frauds in History'
Australia’s Wedgetail Spies Aid NATO Response as Russian MiGs Breach Estonian Airspace
McGowan Urges Chalmers to Cut Spending Over Tax Hike to Close $20 Billion Budget Gap
Victoria Orders Review of Transgender Prison Placement Amid Safety Concerns for Female Inmates
U.S. Treasury Mobilises New $20 Billion Debt Facility to Stabilise Argentina
French Business Leaders Decry Budget as Macron’s Pro-Enterprise Promise Undermined
Trump Claims Modi Pledged India Would End Russian Oil Imports Amid U.S. Tariff Pressure
Surging AI Startup Valuations Fuel Bubble Concerns Among Top Investors
Australian Punter Archie Wilson Tears Up During Nebraska Press Conference, Sparking Conversation on Male Vulnerability
Australia Confirms U.S. Access to Upgraded Submarine Shipyard Under AUKUS Deal
“Firepower” Promised for Ukraine as NATO Ministers Meet — But U.S. Tomahawks Remain Undecided
Brands Confront New Dilemma as Extremists Adopt Fashion Labels
The Sydney Sweeney and Jeans Storm: “The Outcome Surpassed Our Wildest Dreams”
Erika Kirk Delivers Moving Tribute at White House as Trump Awards Charlie Presidential Medal of Freedom
British Food Influencer ‘Big John’ Detained in Australia After Visa Dispute
ScamBodia: The Chinese Fraud Empire Shielded by Cambodia’s Ruling Elite
French PM Suspends Macron’s Pension Reform Until After 2027 in Bid to Stabilize Government
Orange, Bouygues and Free Make €17 Billion Bid for Drahi’s Altice France Telecom Assets
×