Half a block south of Los Angeles’s ritzy Hancock Park neighborhood, a secret underground stream that draws its water from the mountains of Griffith Park runs across the backyards of several unassuming homes. On a quizzical block where each house provides a corresponding bridge to span the stream, Los Angeles–based architect Dan Brunn is busy erecting a 200-foot-long house that doubles as its own bridge.

The steel-framed Bridge House spans a small creek, framing the natural feature with lengths of steel, concrete footings, and—soon—glass-filled openings. (Courtesy Dan Brunn Architecture)

The 4,500-square-foot home is being built using the BONE Structure prefabricated steel construction system, a modular product developed by an eponymous manufacturer based out of Laval, Quebec, Canada. The all-steel system is fabricated entirely off-site and put together on-site, each element assigned an individualized bar code designating its placement. Brunn utilized a five-by-five-foot module “designed around experience, not transport or manufacture” to create the home.

The three-bedroom, shotgun-style house is arranged with a carport facing the street. From there, a living room, kitchen, and courtyard extend into the site, followed by a bathroom sandwiched between two smaller bedrooms. A master suite caps the back end of the home, concealing an office space located below that is accessible to the banks of the stream.

The home is designed using a custom five-foot- wide module provided by Canadian manufacturer BONE Structure that, according to architect Dan Brunn, is optimized for design and user experience. (Courtesy Dan Brunn Architecture)

Brunn said, “The precision of the BONE Structure system is so evident and clear, it’s like seeing the inside of a Swiss watch.”

The home is currently under construction and is expected to be complete late 2018.

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