In the city's Villeray neighborhood, a cramped structure is recast as an open work-play space for a young family.

Affordable gestures abound in this transformation of a dilapidated former duplex in the Texas Hill Country.

A couple gets their hands dirty in Brooklyn by rehabilitating a 19th-century tenement to reveal decades of layers and scores of...

Two architects transform a modest midcentury home, incorporating walls of glass that yield 180-degree views of the San Francisco...

In a leafy Long Beach neighborhood, a modernist post-and-beam duplex by architect Clifton Jones Jr. combines two mirror-image...

Put off by Montreal’s rising rents, a young couple turn to first-time homeownership and dive into a design-led renovation.

With dramatic city views and over 6,000 square feet of living space, this loft is award-winning in its own right.

Apartment B9 is a top-floor duplex in the Lithuanian capital of Vilnius that looks much larger and loftier than its 1,077 square...

As stylish as the elegant Back Bay neighborhood around it, this spacious home is a must-see.

The industrial-modern Metamorphosis House is now a showcase for art.

In Paris, a makeshift duplex is tailor-made for a couple, their toddler, and their cat.

The owners might have three kids, but the idea for this unconventional addition came from the client’s childhood “dream house”...

True to the Craftsman archetype, the 1920s house offers a charming front porch and an interior full of well-maintained wood...

Freshly renovated, this three-story duplex in Crown Heights offers flexibility in living arrangements.

The pair of four-bedroom residences feature sliding glass doors that open the interior to a tropical-style backyard oasis and...

Rock musician Jon Bon Jovi has just sold his duplex apartment at 150 Charles Street for $15,995,000.

Inside a historic Victorian, ROAR Architects designs a flat for each sibling that connect to shared spaces.

The influential husband-and-wife team lived in the Upper East Side apartment, dubbed a "cultural hub for artists and designers,"...

The gorgeous, massive rooms of this pet-friendly residence are a wonder of intricate millwork and artisanal detail.

Carefully placed windows steep this crisp Chicago apartment in the texture of the city.

Persevering through a roller-coaster renovation, a San Francisco family makes room for extended relatives in their revamped...

The 20th-century unit hosts a trove of original detail, including a Charlotte Perriand–designed kitchen and a staircase by Jean...

Perched high in the city's Index Tower, the modern dwelling is fitted with luxe, custom-made finishes and spellbinding views.

Once a sea captain’s residence in the 1850s, Katie Mossman’s Greenpoint address comes with two units and a detached studio.

Architect Don Dimster celebrates the concept of communal family space with a pair of homes in Venice, California, for himself and...

Designed with his partner Ruth Schneider, the Laurel Canyon duplex sprouts organically from the hillside.

On the island of Zeeburgereiland, this duplex references Dutch maritime history and biophilic design.

Irving Berlin's glamorous Yorkville penthouse is now for sale.

A three-story building is transformed into a flexible residence that can serve as a single home or a duplex.

The legendary singer and actress called this light-filled duplex home for over 30 years.

Nestled in a pre-war duplex in New York City, the historic apartment is treated to a modern makeover.

Architect Max Kuo transforms a back house and garage into a white-gabled duplex for a diverse mix of residents.

MOA Architecture inserts a wood box into a Montreal duplex to make room for three generations of a growing family.

They took a deep dive into the ‘80s with their first rental; now a nostalgic couple moves into the next decade by reconstructing...

Nestled in a 19th-century church and school, these Bushwick apartments feature cathedral ceilings and Gothic details.

Patrice Rios, founder of interior design firm Troo Designs and custom shipping container business Sige&Honey, has combined her...