Found Union Square powered by Sonder
140 Mason St.
View on map and nearby hotels
10 nights, 2 adults
Includes taxes and charges
10 nights, 2 adults
Includes taxes and charges
Why people book this hotel
“Good location to Bart and Muni”
“Location is excellent”
“Staff were very friendly and accomodating”
“Stuffs are helpful and talkative, welling to provide information”
“Super clean”
“Great location, good value, lovely staff, clean, modern and quite cool”
“Bathroom had adequate towels”
“It has small but well designed rooms great for one person or a couple and a nice…”
“I arrived during a power cut in downtown, staff handled well, good value, and cl…”
“The small guest kitchen was very useful for breakfast”
“No breakfast but a close restaurant open at 6”
Overview
Located in the heart of San Francisco, Sonder at FOUND Union Square is 400 metres from Union square and 800 metres from Moscone Center. It is a 5 minutes’ walk from San Francisco’s Powell Street BART and Muni station. Sonder at FOUND Union Square features free WiFi throughout the property. There is a 24-hour front desk at the property along with common spaces. There is also on-site laundry available for an additional fee. San Francisco City Hall is 1 km from Sonder at FOUND Union Square, while Coit Tower is 2 km from the property. The nearest airport is San Francisco International Airport, 23 km from the property.
Traveller reviews
Philip
solo_traveller
June 1, 2026
“Recommend this hotel.”
Super clean. Bathroom had adequate towels. The lady at reception was excellent. Having a laundry really helps. TV was a challenge but got there in the end. Good location to Bart and Muni. Staying again on the return trip home.
Badr
solo_traveller
June 1, 2026
“Welcoming but the smell is a problem”
The kindness of Alafa (I might write it wrongly, she is American Persian) she was so kind and did everything she can to solve the issues I faced at the hotel. Her kindness compensated every single problem. Thank you.
Vera Elvira
solo_traveller
May 24, 2026
“Good location, comfortable stay.”
Staff were very friendly and accomodating. Location is excellent.
Julija
solo_traveller
May 23, 2026
“Great cozy stay in central San Francisco”
There were a lot of negative reviews about the property conditions, it was not the newest, but it is well kept, cozy, I literally felt like home in there.
Romana
solo_traveller
April 22, 2026
“Great hotel for solo travelers and business people”
The hotel is located in an area that allows easy commute to all major attractions and conference venues as well as simple public transit commute from and to SFO Airport. It has small but well designed rooms great for one person or a couple and a nice communal area with a kitchen, lounge, and laundry on the second floor. Also there are a couple of great restaurants next door you can go to for lunch or dinner.
SiLVEN
solo_traveller
March 15, 2026
Public kitchen is good. Plenty disposable tableware and supplements can be used.
ChingYan
extended_group
February 20, 2026
Stuffs are helpful and talkative, welling to provide information.
Nicholas
solo_traveller
February 9, 2026
“Winning hotel but for the street noise”
Great location, good value, lovely staff, clean, modern and quite cool.
Erwann
extended_group
February 7, 2026
“Amazing!”
The staff is very friendly and helpfull. The beds are clean and confortable. Coffee/chocolate machine and the kitchen are optimal!
Ross
couple
February 2, 2026
I liked the shared lounge and hydration station area. As well as the staff
George
couple
January 24, 2026
“Great budget hotel”
Convenient location, clean and nice facilities
Claudia
extended_group
January 21, 2026
“Functional”
The bed was extremely comfortable and our room was very quiet (we got an inside one), which made for a great night sleep. The shared spaces were really nice, as was the location. We could walk to many places.
Firouzeh
extended_group
January 20, 2026
“It was two nights, and for the money was good. Bed was comfortable and no noise”
There was no closet to hang clothes, and there were only hangers inside bathrooms, next to bathroom door. Made it difficult to enter and not hit the hangers.and no place to hold hand towels by the sink in the room. There was drawer in the room if you can fold your clothes.
Jacqueline aparecida
family_with_children
January 19, 2026
The hotel is very centrally located, close to the subway and BART station. The small guest kitchen was very useful for breakfast. The washing machine and dryer were very useful. The locker for leaving our bags before and after the flight was a great help. We requested early check-in, but it wasn't possible.
He
solo_traveller
January 16, 2026
“To repeat again”
No breakfast but a close restaurant open at 6.00 AM. So fabulous and friendly. Common room for coffee, kitchen : very good idea Close to Chinatown and Fishermen warfs. Located in Downtown : so, the top.
Daisy
couple
January 2, 2026
“Good value”
I arrived during a power cut in downtown, staff handled well, good value, and clean
Guest
extended_group
December 23, 2025
“It was two nights, and for the money was good. Bed was comfortable and no noise”
There was no closet to hang clothes, and there were only hangers inside bathrooms, next to bathroom door. Made it difficult to enter and not hit the hangers.and no place to hold hand towels by the sink in the room. There was drawer in the room if you can fold your clothes.
Janis
couple
December 19, 2025
“Don’t ruin your trip to save a bit of money!”
Location!
Paulo Cesar
solo_traveller
December 14, 2025
“Great location and staff, but room condition and noise issues affected the stay.”
Overall, the staff were very friendly and helpful, and the hotel’s location was great: close to cafés, restaurants, bars, and public transport.
Man Wai
couple
December 10, 2025
“Nice stay in this hotel, if I will be back in SF, will definitely choose here.”
Good location (next to cable car), clean, nice staff. Also can have free coffee in the morning before go out.
Facilities
Cleanliness & disinfecting
Use of cleaning chemicals that are effective against Coronavirus, Linens, towels and laundry washed in accordance with local authority guidelines, Guest accommodation is disinfected between stays, Guest accommodation sealed after cleaning, Property is cleaned by professional cleaning companies, Guests have the option to cancel any cleaning services for their accommodation during their stay
Food & drink safety
All plates, cutlery, glasses and other tableware have been sanitized, Physical distancing in dining areas
General
Non-smoking rooms, Lift, Non-smoking throughout, Air conditioning
Internet
Internet services, WiFi, Free WiFi
Physical distancing
Contactless check-in/check-out, Cashless payment available, Physical distancing rules followed, Screens or physical barriers placed between staff and guests in appropriate areas
Reception services
Invoice provided
Safety features
Staff follow all safety protocols as directed by local authorities, Shared stationery such as printed menus, magazines, pens, and paper removed, Hand sanitizer in guest accommodation and key areas
Services
Laundry
King Room
The double room features air conditioning, a wardrobe, as well as a private bathroom boasting a bath or a shower and a hairdryer. The unit has 1 bed.
Queen Room
The double room features air conditioning, a wardrobe, as well as a private bathroom boasting a bath or a shower and a hairdryer. Rooms on the upper floors are reachable by lift. The unit has 1 bed.
Queen Room
The double room provides air conditioning, a wardrobe, as well as a private bathroom featuring a bath or a shower and a hairdryer. Rooms on the upper floors are reachable by lift. The unit offers 1 bed.
Standard Double Room
The double room offers air conditioning, a wardrobe, as well as a private bathroom boasting a bath or a shower and a hairdryer. Rooms on the upper floors are reachable by lift. The unit has 2 beds.
Superior Twin Room
The twin room offers air conditioning, a wardrobe, as well as a private bathroom boasting a bath or a shower and a hairdryer. The unit has 2 beds.
Twin Room
The twin room provides air conditioning, a wardrobe, as well as a private bathroom featuring a bath or a shower and a hairdryer. Rooms on the upper floors are reachable by lift. The unit offers 2 beds.
Quadruple Room
The quadruple room offers air conditioning, a wardrobe, as well as a private bathroom boasting a bath or a shower and a hairdryer. The unit has 4 beds.
Superior Quadruple Room
The quadruple room provides air conditioning, a wardrobe, as well as a private bathroom featuring a bath or a shower and a hairdryer. Rooms on the upper floors are reachable by lift. The unit offers 4 beds.
Hotel Policies
Price Watch
Email me price updates for Hotel Found Union Square powered by Sonder
Each day we'll check prices and send you an email for your selected dates at Found Union Square powered by Sonder.
If you don't have specific dates but would like to check prices for say next weekend or say next month we can check the price too.




