Important: This destination may have COVID-19 travel restrictions in place, including specific restrictions for lodging. Check any national, local, and health advisories for this destination before you book.

Skip to main content.
All properties in San Francisco, California, United States of America
1 room, 2 adults

Inn At Union Square - A Greystone Hotel, San Francisco

3.5-star3.5 stars
440 Post St, San Francisco, CA, 94102, United States of America

Boutique hotel, steps from SHN Curran Theatre
  • Free WiFi
  • Collect stampsYou can collect™ Rewards stamps here
  • Can't say enough about this property .... clean & well maintained boutique hotel,…Jan. 21, 2020
  • Super clean hotel room and friendly and courteous staff. The elevator is a bit scary and…Nov. 19, 2019

Inn At Union Square - A Greystone Hotel, San Francisco

from $221 CAD
  • Superior Room, 1 King Bed
  • Superior Room, 1 Queen Bed
  • Superior Studio, 1 King Bed
  • Superior Suite, 1 King Bed
  • Superior Studio, 1 Queen Bed

What’s around Inn At Union Square - A Greystone Hotel, San Francisco


  • In Downtown San Francisco
  • San Francisco Museum of Modern Art - 11 min walk
  • Moscone Convention Center - 13 min walk
  • Orpheum Theater - 16 min walk
  • San Francisco City Hall - 24 min walk
  • Exploratorium - 26 min walk
  • Lombard Street - 27 min walk
  • Oracle Park - 29 min walk

Getting around

  • San Francisco Intl. Airport (SFO) - 19 min drive
  • Oakland Intl. Airport (OAK) - 25 min drive
  • Hayward, CA (HWD-Hayward Executive) - 30 min drive
  • San Carlos, CA (SQL) - 28 min drive
  • Concord, CA (CCR-Buchanan Field) - 35 min drive
  • Novato, CA (NOT-Gnoss Field) - 42 min drive
  • San Francisco Station - 23 min walk
  • 22nd Street Station - 4 min drive
  • Bayshore Station - 9 min drive
  • Powell St & Post St Stop - 1 min walk
  • Powell St & Geary Blvd Stop - 2 min walk
  • Powell St & Sutter St Stop - 2 min walk

At a glance

Key facts

Hotel size

  • This hotel has 30 rooms
  • This hotel is arranged over 6 floors


  • Check-in time 3:00 PM-anytime
  • Check-out time is noon
Front desk staff will greet guests on arrival.

Required at check-in

  • Credit card required for incidental charges

  • Government-issued photo ID may be required

Travelling with others


  • No cribs (infant beds)


  • Pets not allowed (service animals welcome)


  • Free WiFi in public areas

  • Free WiFi in rooms



  • No parking

Payment types at the property

Other information

  • Smoke-free property
* See small print for additional details or extra charges

In the hotel

Food and drink
  • Room service
Things to do
  • Bicycle rentals nearby
  • Scooter/moped rentals nearby
Working away
  • Business center
  • 24-hour front desk
  • Concierge services
  • Tours/ticket assistance
  • Dry cleaning/laundry service
  • Laundry facilities
  • Free newspapers in lobby
  • Luggage storage
  • Wedding services
  • Multilingual staff
  • Porter/bellhop
  • Number of buildings/towers - 1
  • Elevator
  • Safe-deposit box at front desk
  • Fireplace in lobby
  • Braille or raised signage
  • Accessible bathroom
  • In-room accessibility
  • Roll-in shower
  • Wheelchair-accessible path of travel
  • Wheelchair-accessible parking
Languages Spoken
  • English
  • Spanish

In the room

Home comforts
  • Ceiling fan
  • Coffee/tea maker
  • Bathrobes
  • Slippers
  • Iron/ironing board
Sleep well
  • Hypo-allergenic bedding available
  • Blackout drapes/curtains
  • Turndown service
  • Premium bedding
  • Pillowtop mattress
Things to enjoy
  • In-room massage available
Freshen up
  • Private bathroom
  • Shower only
  • Designer toiletries
  • Hair dryer
Be entertained
  • 32-inch flat-screen TV
  • Premium TV channels
  • Tablet computer
Stay connected
  • Desk
  • Free weekday newspaper
  • Free WiFi
  • Phone
Food and drink
  • Refrigerator (on request)
  • Free bottled water
  • Daily housekeeping
  • In-room safe (laptop compatible)

Inn At Union Square - A Greystone Hotel, San Francisco’s small print

Also known as

  • Inn Union Square Greystone Hotel
  • At Union Square A Greystone
  • Inn At Union Square A Greystone Hotel
  • Inn At Union Square - A Greystone Hotel Hotel
  • Inn At Union Square - A Greystone Hotel San Francisco
  • Union Square Greystone
  • Inn At Union Square - A Greystone Hotel Hotel San Francisco
  • Inn At Union Square
  • Inn Union Square Greystone Hotel San Francisco
  • Inn Union Square Greystone Hotel
  • Union Square Greystone San Francisco


Guests can rest easy knowing there's a carbon monoxide detector, a fire extinguisher, a smoke detector, and a security system on site.

This property advises that enhanced cleaning and guest safety measures are currently in place.

Disinfectant is used to clean the property; commonly-touched surfaces are cleaned with disinfectant between stays; bed sheets and towels are laundered at a temperature of at least 60°C/140°F.

Social distancing measures are in place; staff at the property wear personal protective equipment; periodic temperature checks are conducted on staff; guests are provided with hand sanitizer.

Contactless check-in and contactless check-out are available.

Each guestroom is kept vacant for a minimum of 72 hours between bookings.

The property affirms that it adheres to the SafeStay (AHLA - USA) sanitization guidelines.

The name on the credit card used at check-in to pay for incidentals must be the primary name on the guestroom reservation.

We have included all charges provided to us by this property. However, charges can vary, for example, based on length of stay or the unit you book.

FAQs for Inn At Union Square - A Greystone Hotel, San Francisco

  • Does Inn At Union Square - A Greystone Hotel offer free cancellation for a full refund?
    Yes, Inn At Union Square - A Greystone Hotel does have fully refundable rooms available to book on our site, which can be cancelled up to a few days before check-in. Just make sure to check this property's cancellation policy for the exact terms and conditions.
  • Is parking offered at Inn At Union Square - A Greystone Hotel?
    Sorry, there's no parking at Inn At Union Square - A Greystone Hotel.
  • Are pets allowed at Inn At Union Square - A Greystone Hotel?
    Sorry, pets aren't allowed, but service animals are welcome.
  • What are the check-in and check-out times at Inn At Union Square - A Greystone Hotel?
    You can check in from 3:00 PM to anytime. Check-out time is noon.
  • Are there restaurants at or near Inn At Union Square - A Greystone Hotel?
    Yes. Nearby restaurants include Sears Fine Food (1-min walk), Scala's (1-min walk), and Daily Grill (2-min walk).

Recent reviews

Exceptional 9.4 From 390 reviews

Very Good 8.0
Great Hotel for SF
This is a great spot to stay when visiting SF: very convenient location, great service; and comfortable/clean room to stay in. Would definitely look here first when visiting SF again.
ca1 night romance trip
Exceptional 10.0
Good service, good small breakfast, well positioned, nice room but we can hear others talk.
ca5 night business trip
Good 6.0
The first room I was given was totally dark, with negligeable daylight. And the lift does not work properly, turning around in mid journey. I twice gave up and had to walk down from 6th floor.
Flemming, us1 night trip
Good 6.0
I booked with the Inn at Union square. that hotel was amazing when i stayed their. However this time they booked me with their other hotel King George. I really didnt care for that hotel it was uncomfortable, flat pillows, could not control the room temperature, shower was cold and black mold in the bathroom. I love the Inn at Union square. Everyone at King George was verynice and accomodating but agai. Uncomfortable
Stacey, us2 night trip
Exceptional 10.0
Looking forward to our next visit
The staff was incredibly friendly and helpful. The location is great and convenient to rear shopping and transport.
Sixto, us1 night business trip
Exceptional 10.0
Extremely helpful and friendly staff, always willing to help. Very convenient position both to access cable cars and shops. Only downside was the lack of a free shuttle service, but staff will arrange limo or taxi service to and from the airport
gb4 night trip
Exceptional 10.0
Super convenient, clean and accommodating. Great bed and snacks!
susan, us1 night trip
Exceptional 10.0
Beautiful hotel. Great staff, Charming, very clean and quiet. Loved breakfast , wine hour and the warm cookies . We really enjoyed our stay.❤️
Kim, us2 night family trip
Exceptional 10.0
Very clean and good service. Excellent location.
Diego, mx4 night trip
Exceptional 10.0
Excellent service and location.
Assanee, th8 night business trip

Inn At Union Square - A Greystone Hotel, San Francisco

Is the description of this hotel not correct? Tell us