Found Union Square

4/5 Solid ()

Union Square, San Francisco

Culture and history mixed with new-age tech. Stay in the heart of San Francisco at Found Union Square. This recently remodeled building starts with a mid-century modern black and gray brick exterior. The refurbished lobby is coated with subway tile accent walls and herringbone-style floors. Earth tones and wood finishes add a simple yet modern touch to your space. Next door, stylish Bodega SF serves Vietnamese-inspired dishes, voted SF Bay Area 2022 restaurant of the year. And the shopping district is within walking distance. You could easily spend a day at Westfield San Francisco Centre — a nine-story mall with over 170 retail and food options. Take a stroll to The Painted Ladies or indulge in fresh seafood at Fisherman's Wharf. Treasure this high-spirited city at Found Union Square.

Top amenities

Lounge and Work Space

Air conditioning


Front Desk

See all amenities

The Sonder standard

Contactless check-in

Fast WiFi

Professionally cleaned

Fresh towels

Powered by Sonder

A collection of boutique hotels. No two properties are alike but all are powered by Sonder’s staff and mobile guest app.

Availability and rates

2 night min
December 2023
January 2024




Book with peace of mindCancel your reservation up to 3 days before check-in for a full refund

Please note: The layout, furniture, and decor of your space may vary from what's shown here.

Sonder Logo Outline
Content is loading...

Amenities at Found Union Square

The Sonder standard

Working, relaxing, and living. Our spaces have all the essentials you need for your stay.

Contactless check-in
Fast WiFi
Professionally cleaned
Fresh towels
24/7 support
Artisan coffee
Comfortable bedding
Shower amenities

Building amenities

Air conditioning


Front Desk

Luggage Storage

Lounge and Work Space

Kid Friendly

The neighborhood

Union Square

Filled with art galleries, cable cars, and shopping of all kinds, Union Square is a lively cultural center in downtown San Francisco. From boutique shops to big-name designers, the shopping here is world-class. It’s also easy to walk or ride public transit to a large part of the city. Stroll over to the Mission for murals and burritos, or ride a historic streetcar to the Ferry building for oysters and views of the bay. Whatever you end up doing, this Sonder is perfectly positioned to experience all this city has to offer.


Union Square, 140 Mason Street, San Francisco

Public Transit

Nearest Public Transportation: Powell. Public Transportation to City Center: 0 min.


Driving time to the city center is about 0 minutes.


  • There is no free street parking nearby

  • Paid street parking nearby

  • There are no free parking lots nearby

  • There's a paid parking lot nearby

Booking policies

Check-in is at 4:00 pm Checkout is at 11:00 am

You may request early check-in and/or late check-out after booking. Our team will do our best to accommodate any requests based on availability.


  • Wheelchair accessibility not available

  • Elevators available

House Rules

  • No smoking (not even on balconies/patios)

  • No pets (not even really cute ones) unless otherwise stated

  • No parties (not even really quiet ones)

* Please be respectful of your neighbors and keep noise to a minimum from 10:00 pm – 8:00 am.

Please note

  • There is no cable or daily cleanings.

  • This is a central location and prone to city noise.

  • License number: 1206719-12-181.

Flexible cancellation

We offer flexible cancellations for all bookings. Select the Flex Rate to cancel your booking up to 3 days before check-in and receive a full refund. For longer stays that are paid monthly, we require at least 30 days notice to cancel or modify without fees.

Anything else you'd like to know?

For all stays less than 90 nights, call our team at 1-617-300-0956 (or select an international phone number here) or email us at [email protected].

For stays 90 nights and longer, email our sales team at [email protected].