FOUND Union Square

Tenderloin, San Francisco

Hop on a cable car and let vacation mode commence. Explore the iconic sights, diverse restaurants, and countless shops that San Francisco has to offer. Just steps away from vibrant Market Street, your cozy space at FOUND Union Square awaits your arrival. You can’t miss this refurbished, black brick exterior with bold golden “FOUND” letters. As you enter the building, you’re met with a mid-century modern lobby coated with subway tile accent walls and herringbone style floors. Step outside and you're faced with the nine-story Westfield San Francisco Centre — where the shopping is endless. Grab a freshly roasted cup on the go from Blue Bottle Coffee. Take a short walk to the lively Union Square plaza. Or escape the city as the fountain sings and the flowers blossom at Yerba Buena Gardens. Discover some of the city’s famous sites like The Painted Ladies or Fisherman’s Wharf. After a day of exploring, the FOUND Union Square is the perfect place to rest your head at night.

The Sonder standard

Contactless check-in

Professionally cleaned

Fast WiFi

24/7 support

Top amenities

Lounge and Work Space

Air conditioning


Front Desk

Responding to COVID-19

We thoroughly clean and disinfect each Sonder before and after every stay. We also offer self check-in and 24/7 guest support via our app, so you can limit in-person interactions.
Learn more

Availability and rates


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.

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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

Air conditioning


Front Desk

Luggage Storage

Lounge and Work Space

Kid Friendly

The neighborhood


Tenderloin is situated between the Union Square shopping district and the Civic Center office district. Filled with animated streets, hip coffee shops, and alluring nightlife, it's the perfect place for travelers to uncover the gritty parts of San Francisco. It is home to the Great American Music Hall, eclectic eateries, and several other avant-garde venues awaiting discovery. While staying in this highly populated and active area, you may encounter some late-night noise.


Tenderloin, 140 Mason Street, San Francisco

Public Transit

Nearest Public Transportation: Powell. Public Transportation to Downtown: 0 min.


Driving time to downtown 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

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

  • There's no cable or luggage storage. We've partnered with Vertoe in multiple locations around San Fransisco for you to drop your bags.

  • 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?

Message our team at [email protected] for stays less than 45 nights. Message our team at [email protected] for stays 45 nights and longer.