Rooftop terrace with artificial grass, white chairs, a small green table, metal railing, and a structure with a door and frosted panels, with trees and houses in the background at sunset.

OFFICE OF MOBILE DESIGN

Office of Mobile Design (OMD) is an award-winning architecture studio led by Jennifer Siegal, known for pioneering work in modular architecture, prefabrication, and mobile building systems. Based in California, OMD designs adaptable structures that respond intelligently to climate, context, and community, from fire-resistant homes and resilient ADUs to experimental installations and urban prototypes.

With over 25 years of expertise, OMD combines industrial precision with design innovation to create sustainable, flexible solutions for the built environment. Our work explores the future of living through off-site construction, proving that architecture can be both radically efficient and quietly poetic.

A sunlit room with large windows, a wooden floor, a textured wooden wall on the left, and a beige lounge chair near the windows.
Modern building with metal siding, large windows, and a translucent enclosed porch area, during sunset.

A leader in sustainable, modular architecture.

Factory-built with precision.

Live lighter on the earth.

A delivery truck with its back doors open, revealing a cozy living space inside with two people sitting on a bench. The house is a white exterior with a window showing a flower vase with sunflowers, and the truck is parked on a small porch with a lawn in the foreground.
Modern white house with large windows, a blue sky, a small swimming pool, outdoor chairs, and desert plants in the yard.

Why Modular?

Why Modular?

A yellow crane lifting a small house structure into the air against a partly cloudy sky.

Modularity without compromise is the defining feature of Office of Mobile Design’s design strategy.

Modular design allows for streamlined permitting, faster installation times, and sustainable constructions by combining the best of onsite and offsite construction methods. It also allows for greater precision, ensuring clean lines and a contemporary feel without compromising the personal touches that make a house feel like a home.

A desert landscape with yellow and white wildflowers, sparse bushes, and succulents, with rocky hills and a small building in the background under a blue sky.

Lightweight By Design

Each module is prefabricated off-site for precision and quality control, then delivered and assembled onsite, reducing construction waste and minimizing environmental impact. The design emphasizes clean lines, generous daylighting, and flexible interior layouts that respond to changing household needs.

Sustainability and resilience guide the material palette. Engineered wood, steel, and high-performance glazing work in tandem to create a durable envelope. Interior finishes are carefully selected for longevity, low VOC emissions, and aesthetic warmth, demonstrating that environmental responsibility and design excellence are not mutually exclusive.

Close-up of a rope on a staircase handrail, with stairs and metal framing in the background.

Modular and off-site construction offers a lightweight, sustainable approach by reducing material waste and embodied carbon through precise, factory-based fabrication. With most work done off-site, environmental disruption is minimized, with less soil disturbance, reduced noise, and shorter construction timelines preserve the integrity of the landscape. The result is efficient, high-performance architecture with a lighter footprint on both the site and the environment.

Hand-Craft Meets Precision-Craft

Meet Jennifer Siegal, Founder of OMD

Live in architecture.

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