Share This Listing

Message

962 characters remaining

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

Your email has been sent.

Still interested?

Contact the brokers for more information about this property

All Available Space(1)

Display Rental Rate as

  • Space
  • Size
  • Term
  • Rental Rate
  • Space Use
  • Build-Out
  • Available
  • 1st Floor, Ste A2
  • 257 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • -
  • Now
Space Size Term Rental Rate Space Use Build-Out Available
1st Floor, Ste A2 257 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office - Now

1st Floor, Ste A2

Size
257 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Build-Out
-
Available
Now

Property Overview

20 Sunnyside is downtown Mill Valleys' premier class A office building. Newaley renovated both inside and out 20 Sunnyside offers a variety of small spaces perfect for your local needs. With Mill Valley's most loved stores, coffee shops & restaurants right down the street along with a plethora of other amenities, 20 Sunnyside is the new gold standard for downtown office.

  • Signage
  • Skylights
  • Storage Space
  • Central Heating
  • Natural Light
  • Open-Plan
  • Air Conditioning

Property Facts

Building Type
Office
Year Built/Renovated
1964/2022
Building Height
2 Stories
Building Size
7,521 SF
Building Class
A
Typical Floor Size
3,761 SF
Parking
8 Surface Parking Spaces
Surface Tandem Parking
Covered Parking
Covered Tandem Parking
Reserved Parking
Moderately walkable
60/100
Very drivable
80/100
Limited public transit
30/100
Moderately bikeable
60/100
  • Listing ID: 28251431

  • Date on Market: 5/5/2026

  • Last Updated:

  • Address: 20 Sunnyside Ave, Mill Valley, CA 94941

Link copied
Your LoopNet account has been created!

Please Share Your Feedback

We welcome any feedback on how we can improve LoopNet to better serve your needs.
X
{{ getErrorText(feedbackForm.starRating, "rating") }}
255 character limit ({{ remainingChars() }} charactercharacters remainingover)
{{ getErrorText(feedbackForm.msg, "rating") }}
{{ getErrorText(feedbackForm.fname, "first name") }}
{{ getErrorText(feedbackForm.lname, "last name") }}
{{ getErrorText(feedbackForm.phone, "phone number") }}
{{ getErrorText(feedbackForm.phonex, "phone extension") }}
{{ getErrorText(feedbackForm.email, "email address") }}