36 Old Landing Road, Tiburon, CA 94920

← Back to search

$17,500,000

bedrooms

bathrooms

square feet

6,721

Acreage

5.34

Open Houses

year built

2007

Full Baths

Half Baths

Find out more

One of One. Rarely does a property combine architectural significance, extraordinary scale, and a true beachfront setting so effortlessly. Set directly on the San Francisco Bay in Tiburon, La Casa Dei Quattro Orizzonti (the House of the Four Horizons) is a remarkable 6,721± square foot, five-bedroom, five-bath modern estate offering exceptional privacy and seamless single-level living on a 5.33 acre mostly level lot that flows directly to the white sand beach and the Bay. Designed by noted Italian architect Andrea Ponsi, featured in numerous architectural and design publications, and built ground-up by Red Horse Constructors, the residence draws inspiration from California mid-century modernism. Conceived as four pavilions arranged around a serene interior garden courtyard, the home is defined by extraordinary scale, abundant natural light, strong architectural sight-lines and expansive, retracting walls of glass that create a continuous connection between indoors and out. The thoughtful design provides exceptional separation between grand scale public living spaces, the private primary wing, guest accommodations, and functional spaces including a three-car garage. An art collector’s dream, the public areas incorporate extensive gallery space while maintaining an open, light-filled environment for everyday living and entertaining. Distinctive design details enhance the spaces, including copper accents, custom lighting, vaulted ceilings, and modern Italian cabinetry. A dramatic central axis draws the eye from the entry through the home to the water, while expansive terraces and decks step gently toward the shoreline, where water activities, a spa, and the beach beckon. The gardens abound – from an orchard garden at the entry and a private Japanese garden adjoining the primary wing to flower and herb gardens and the native landscape along the Bay. Conceived in harmony with its exceptional setting, the eco-friendly home incorporates passive solar strategies, natural ventilation, photovoltaic solar and environmentally conscious materials, including ipe wood-slat ventilated exterior walls, copper roofing, and solar glass canopies. Private yet remarkably accessible, this is a singular Tiburon beachfront estate—an exceptional convergence of significant architecture, sustainable design, single-level living and an intimate connection to the San Francisco Bay.

Location
Subdivision	-
County	Marin County
Elementary School	-
Middle School	-
High School	-

Driving directions

Open houses

None scheduled.

Find out more

Tell us who you are, and we will have someone reach out to you.

Name*

Email*

Phone*

Message

I have a house to sell

By proceeding, you consent to receive calls, texts and voicemails at the number you provided (may be recorded and may be autodialed and use pre-recorded and artificial voices), and email, from Kotohomes, Mercury News, Stephanie Lamarre, and their network of service providers about your inquiry and other home-related matters.

Msg/data rates may apply. This consent applies even if you are on a do not call list and is not a condition of any purchase.

MLS number: 326070321

Listing agent: Stephanie Lamarre

Listing broker: Golden Gate Sotheby's International Realty (415) 464-9300

Last update: Thursday, September 17 2026 at 8:09 p.m. EDT

realogy mercurynews