Coldwell Banker Home Page
Local Realty Service Provided By: Coldwell Banker Solano Pacific
Property view
Listing view 2
Listing view 3

123 Round Hill Road, 
Tiburon, CA 94920

$5,695,000


5

Beds


6

Baths


4,608

Sq Ft


Single Family

Active

Listed by

Lena M Lionetti

Susan Hewitt

Golden Gate Sotheby'S International Realty

Last updated:

June 14, 2025, 03:02 PM

MLS#

325053375

Source:

CABAREIS

About This Home

123 Round Hill Road

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.

Home Facts

Single Family

6 Baths

5 Bedrooms

Built in 1957

Price Summary

5,695,000

$1,235 per Sq. Ft.

MLS #:

325053375

Last Updated:

June 14, 2025, 03:02 PM


Rooms & Interior

Bedrooms

Total Bedrooms:

5

Bathrooms

Total Bathrooms:

6

Full Bathrooms:

5

Interior

Living Area:

4,608 Sq. Ft.


Structure

Structure

Building Area:

4,608 Sq. Ft.

Year Built:

1957


Lot

Lot Size (Sq. Ft):

45,359


Finances & Disclosures

Finances

Price:

$5,695,000

Price per Sq. Ft:

$1,235 per Sq. Ft.

Source:CABAREIS
The information being provided by Bay Area Real Estate Information Services, Inc. is for the consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumer may be interested in purchasing. Any information relating to real estate for sale referenced on this web site comes from the Internet Data Exchange (IDX) program of the Bay Area Real Estate Information Services, Inc.. Golden Gate Sotheby'S International Realty is not a Multiple Listing Service (MLS), nor does it offer MLS access. This website is a service of Golden Gate Sotheby'S International Realty, a broker participant of Bay Area Real Estate Information Services, Inc.. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. The accuracy of all information, regardless of source, including but not limited to open house information, square footages and lot sizes, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals. The data contained herein is copyrighted by Bay Area Real Estate Information Services, Inc. and is protected by all applicable copyright laws. Any unauthorized dissemination of this information is in violation of copyright laws and is strictly prohibited. Properties in listings may have been sold or may no longer be available. Copyright 2025 Bay Area Real Estate Information Services, Inc.. All rights reserved.

Contact an Agent

Yes, I would like more information from Coldwell Banker. Please use and/or share my information with a Coldwell Banker agent to contact me about my real estate needs.

By clicking Contact I agree a Coldwell Banker Agent may contact me by phone or text message including by automated means and prerecorded messages about real estate services, and that I can access real estate services without providing my phone number. I acknowledge that I have read and agree to the Terms of Use and Privacy Notice.

 

Contact an Agent

Yes, I would like more information from Coldwell Banker. Please use and/or share my information with a Coldwell Banker agent to contact me about my real estate needs.

By clicking Contact I agree a Coldwell Banker Agent may contact me by phone or text message including by automated means and prerecorded messages about real estate services, and that I can access real estate services without providing my phone number. I acknowledge that I have read and agree to the Terms of Use and Privacy Notice.