Complete Your Profile

The contact details listed below are missing from your profile and are required to proceed. You'll only need to enter these one time.

Results

Share Feedback

Language and Region
Currency

View My Preferences

Advertise

Enter your email to login or create a free account

The username or password you entered is incorrect. Please try again. Remember passwords are case sensitive. If you forgot your password, click to reset it.

If you continue to see this message, your account may be locked due to too many failed attempts. Please contact Customer Support at 1-800-613-1303.

Email*

Email is required This value should be a valid email.

Password*

Password is required

Forgot Password? Remember Me

or continue with

By clicking the button, you agree to LoopNet's Terms of Use and Privacy Notice.

You must register your contact information to view secure information on this listing.

Error occurred with your registration, please try again.

That email address has already been registered. Please try another or click forgot password.

First Name*

First name is required

Last Name*

Last name is required

Email*

Email is required This value should be a valid email.

Password*

Password is required Password is too common or does not have at least 8 characters

I agree to receive marketing messages from CoStar Group and its affiliates by email, SMS, and phone, including automated or prerecorded messages. I can unsubscribe at any time. Standard message and data rates may apply. Privacy Notice

or continue with

By clicking the button, you agree to LoopNet's
Terms of Use and Privacy Notice.

Thank you!
Your account has successfully been created.

Are you primarily looking to use LoopNet to...

FIND properties to lease or buy

LIST properties to lease or sell

This feature is unavailable at the moment.

We apologize, but the feature you are trying to access is currently unavailable. We are aware of this issue and our team is working hard to resolve the matter.

Please check back in a few minutes. We apologize for the inconvenience.

- LoopNet Team

Share This Listing

Email*

Please enter a valid email address.

To send this property to multiple individuals, insert a semi-colon between each recipient's email address.

Message

966 characters remaining

Hmm, there seems to have been an error sending your message. Please try again.

Send me a copy

Your email has been sent.

165 Mason St
Greenwich, CT 06830
Office Property For Lease · 16,000 SF

Office Spaces Connecticut Greenwich 165 Mason St, Greenwich, CT 06830

.mosaic-column{display:inline-block!important;height:100%!important;width:auto!important}.mosaic-tile i{display:none!important}.mosaic-tile img{height:100%!important;width:auto!important}

Save this listing!

Favourite this listing to get notified of price updates, new media and more

Features and Amenities

Metro/Subway

Security System

Property Facts

Building Type

Office

Year Built/Renovated

1984/2008

Building Height

3 Stories

Building Size

24,552 SF

Building Class

Typical Floor Size

9,513 SF

Parking

15 Surface Parking Spaces

80 Covered Parking Spaces

Listing ID: 39543370
Date on Market: 2026-02-23
Last Updated:
Address: 165 Mason St, Greenwich, CT 06830

The Downtown Greenwich Office Property at 165 Mason St, Greenwich, CT 06830 is currently available. Contact Newmark for more information.

OFFICE PROPERTIES IN NEARBY NEIGHBORHOODS

Westchester County South Office Spaces
Downtown Stamford Office Spaces
Harbor Point Office Spaces
Downtown White Plains Office Spaces
Rye Brook/Port Chester Office Spaces
Downtown Greenwich Office Spaces
Larchmont/Mamaroneck Office Spaces
Hartsdale/Greenburgh Office Spaces
Newfield-Westover-Turn of River Office Spaces
Springdale Office Spaces
Glenbrook Office Spaces
North White Plains Office Spaces
West Side-Waterside-South End Office Spaces
Downtown Stamford Historic District Office Spaces
Quaker Ridge Office Spaces

1 of 6

Videos

Matterport 3D Exterior

Matterport 3D Tour

Photos

Street View Street

Map

165 Mason St, Greenwich, CT for lease Primary Photo- Image 1 of 6 — Primary Photo

165 Mason St, Greenwich, CT for lease Building Photo- Image 2 of 6 — Building Photo

165 Mason St, Greenwich, CT for lease Building Photo- Image 3 of 6 — Building Photo

165 Mason St, Greenwich, CT for lease Aerial- Image 4 of 6 — Aerial

165 Mason St, Greenwich, CT for lease Building Photo- Image 5 of 6 — Building Photo

Connect with us

The LoopNet service and information provided therein, while believed to be accurate, are provided "as is". LoopNet disclaims any and all representations, warranties, or guarantees of any kind.

About Us
Careers
Contact Us
Search
Find a Broker
Product Overview
Mobile
Terms of Use
Privacy Notice
Cookie Policy
Exercise Your Rights
Licensing

Share Listing

LinkedIn
Twitter
Facebook

Email
Copy Link
Print

Link copied

Your LoopNet account has been created!

Thank you for your feedback.

Please Share Your Feedback

We welcome any feedback on how we can improve LoopNet to better serve your needs.

255 character limit ({{ remainingChars() }} charactercharacters remainingover)

You can provide feedback any time using the Help button at the top of the page.

Share This Listing

165 Mason St Greenwich, CT 06830 Office Property For Lease · 16,000 SF

Save this listing!

Features and Amenities

Property Facts

Listing ID: 39543370

Date on Market: 2026-02-23

Last Updated:

Address: 165 Mason St, Greenwich, CT 06830

OFFICE PROPERTIES IN NEARBY NEIGHBORHOODS

Share Listing

Please Share Your Feedback

165 Mason St
Greenwich, CT 06830
Office Property For Lease · 16,000 SF