Modular 40: Family & Rental Home

As Featured at Sumu Resort.
Looking for a proven investment? A modified version of this house (customized with a sauna) is the crown jewel of the popular Sumu Resort in Estonia. Guests flock to these earth-sheltered cottages for their silence, uniqueness, and connection to nature. By choosing the Modular 40, you are investing in a structure with a track record of high-demand hospitality, perfect for a standout Airbnb rental or a private family summer cottage.

Layout: Synergy and Space.
This ”Option 40A” layout creates a functional family home by connecting four vaulted modules.

• Two Private Bedrooms: Flanking the house are two separate 9.4m² rooms, ensuring privacy for parents and children or two couples.

• Central Living: A dedicated 9.4m² living area provides a cozy gathering spot.

• Amenities: A fully finished 9.4m² bathroom module with a shower and toilet.

Geothermal Comfort & 100-Year Longevity The magic of Revonia lies in its earth-sheltered design.

• Cool in Summer, Warm in Winter: The surrounding soil acts as a geothermal insulator, drastically reducing heating and cooling costs.

• Healthy Living: Breathable lime plaster walls regulate humidity, creating an allergy-free environment perfect for deep, restorative sleep.

• Built to Last: With a reinforced concrete shell engineered to last a century, this is a low-maintenance asset that protects your investment for generations.

Specs at a Glance:

• Total Usable Area: ~37.3 m²

• Modules: 4 Vaulted Concrete Modules

• Capacity: 4+ people

• Included: Kitchen, Bathroom, Floor Heating, Ventilation

• Price: €84,900 (excl. VAT)

Frequently Asked Questions

Can I add a sauna to this model? Yes. While ”Option A” is designed with two bedrooms for maximum sleeping capacity, a modified version (like the one at Sumu Resort) can replace one of the rooms or modules with a luxury sauna. This is a popular customization for resort owners looking to increase nightly rates.

Is this suitable as a summer cottage? Absolutely. The Modular 40 is the ideal ”lock-up-and-leave” summer house. Because it is earth-sheltered and built of concrete, it is secure, storm-proof, and requires virtually no exterior maintenance – meaning you spend your holidays relaxing, not repairing.

Does it feel dark inside? Not at all. The house features triple-glazed wooden exterior doors and windows that flood the rooms with natural light. The vaulted ceilings also create an airy, spacious atmosphere that defies the ”underground” label.

How is it installed? The concrete modules arrive fully finished. Installation on your prepared plot (usually a compacted gravel base) typically takes just one day. Once the modules are connected, they are covered with soil, instantly blending your home into the landscape.

Video of this house’s installation can be seen here!