123 Round Hill Road, Tiburon, CA 94920

← Back to search

$6,000,000

bedrooms

bathrooms

square feet

4,608

Acreage

1.04

Open Houses

year built

1957

Full Baths

Half Baths

Find out more

Perched on a secluded acre with sweeping views of the Belvedere Lagoon and the San Francisco skyline, this contemporary masterpiece offers the ultimate in privacy, serenity, and sophisticated living. Surrounded by a canopy of majestic oaks, the residence blends breathtaking natural beauty with refined modern design in a park-like setting. Step through the covered entry into a dramatic foyer anchored by striking stone-wrapped walls and wide-plank hardwood floors that flow effortlessly throughout the main level. The spacious living room is designed for both relaxation and entertaining, featuring custom built-ins, a sleek natural gas fireplace, and a state-of-the-art surround sound system. At the heart of the home is a chef’s kitchen that combines style and function with a butcher block island, handcrafted range hood, dual wall ovens, a white cast iron farmhouse sink, built-in refrigerator/freezer, walk-in pantry, and open-concept flow into the adjacent dining and living spaces. The formal dining room is anchored by a stunning 550-bottle climate-controlled wine cellar, enclosed in glass with floor-to-ceiling stonework — a showstopping focal point for dinner parties and wine tastings. The luxurious primary suite is a true retreat, with walls of glass that frame iconic views and spa-like amenities including heated floors, a freestanding soaking tub, dual vanities, his-and-hers toilets, custom cabinetry, and dual walk-in closets. On the lower level, a spacious family/media room with built-ins and surround sound is flanked by three elegant en-suite bedrooms, each offering premium finishes. A large laundry room with sink and laundry tub leads to a massive 1,225 square feet of finished storage space — perfect for wine, gear, or hobby use. The top floor offers flexible use with two stylish home offices and a lounge with a full designer bath — ideal as a guest suite or creative studio. Step outside onto a 1,000 square foot patio, ideal for alfresco entertaining, with direct access to the private backyard and panoramic views. Expansive wraparound decks on each level — totaling over 1,240 square feet — provide front-row seats to sunsets over the Bay and glittering city lights. The backyard is a peaceful escape, thoughtfully landscaped with a vegetable garden, rainwater harvesting, drip irrigation, and a rustic wine barrel bar that brings wine country charm home. This fully integrated smart home offers room-by-room touchscreen controls, built-in ceiling speakers, CAT6 wiring, 24-hour surveillance, and a full-home automatic-start natural gas generator — delivering convenience, security, and ease at every turn. This is more than a home — it’s a modern sanctuary where nature, luxury, and technology converge in perfect harmony. Welcome to your Tiburon escape.

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, Lena Lionetti, 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: NOT ON MLS

Listing agent: Lena Lionetti

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

Last update: Monday, April 21 2025 at 6:18 p.m. EDT

realogy mercurynews