Real Homes.
Real Families.

Over 200 Passivhaus-certified modular homes delivered across Europe.

Every one produced in 3 weeks and delivered complete across Europe.

RIA Retreat by BIOBUILDS consumes just 2 kWh/m² per year, making it one of the most energy-efficient prefabricated homes ever measured.

For context, the Passivhaus standard requires under 15 kWh/m² per year, and the average European home uses 350 kWh/m² per year*.

Four core models: Nest (24 m²), Wanderlust (48 m²), Serenity (95 m²), and Sanctuary (142 m²). Each can be customized in layout, finishes, and configuration.

Because our system is fully modular, you can combine as many modules as you need on a single floor. The core models are what we offer as standard; anything beyond is a custom project tailored to you.

Yes. Two delivery options: turnkey (fully finished, move-in ready) or structure + envelope only (you handle interiors yourself).

Exterior options include Yakisugi charred wood cladding, Lunawood Thermowood, and painted panels. Interior finishes range from Scandinavian minimal to warm natural wood.

What you see on this page is what you get. These are real, completed homes photographed across seasons and locations throughout Europe.

The images are professionally composed to show each home at its best, but what you're looking at is the actual finished product, not computer renders or concept art. We also share time-lapse construction videos showing the full assembly process.