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20 Sunnyside Ave 257 - 730 SF of Office Space Available in Mill Valley, CA 94941

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ALL AVAILABLE SPACES(2)

Display Rental Rate as

  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 1st Floor, Ste A2
  • 257 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Spec Suite
  • Now
  • Rate includes utilities, building services and property expenses
  • Space is in Excellent Condition
  • 2nd Floor, Ste E
  • 473 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Spec Suite
  • Now

Newly renovated office spaces in the heart of downtown Mill Valley with extensive window line and views of Mt. Tam. The building is a 3 minute walk to The Depot, Mill Valley Market, Equator Coffee, and a wide variety of other shops, restaurants, and more. Flexible lease terms and move-in ready, available immediately.

  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Kitchen
  • Accent Lighting
  • New paint, flooring, LED lighting, and blinds
  • Flexible lease terms
  • Common kitchenette
  • Conference Rooms
  • Central Air and Heating
  • Natural Light
  • Building interior and exterior newly remodeled
  • Heating and AC
  • On site parking included
Space Size Term Rental Rate Space Use Condition Available
1st Floor, Ste A2 257 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Spec Suite Now
2nd Floor, Ste E 473 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Spec Suite Now

1st Floor, Ste A2

Size
257 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Spec Suite
Available
Now

2nd Floor, Ste E

Size
473 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Spec Suite
Available
Now

1st Floor, Ste A2

Size 257 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Spec Suite
Available Now

  • Rate includes utilities, building services and property expenses
  • Space is in Excellent Condition

2nd Floor, Ste E

Size 473 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Spec Suite
Available Now

Newly renovated office spaces in the heart of downtown Mill Valley with extensive window line and views of Mt. Tam. The building is a 3 minute walk to The Depot, Mill Valley Market, Equator Coffee, and a wide variety of other shops, restaurants, and more. Flexible lease terms and move-in ready, available immediately.

  • Mostly Open Floor Plan Layout
  • Conference Rooms
  • Space is in Excellent Condition
  • Central Air and Heating
  • Kitchen
  • Natural Light
  • Accent Lighting
  • Building interior and exterior newly remodeled
  • New paint, flooring, LED lighting, and blinds
  • Heating and AC
  • Flexible lease terms
  • On site parking included
  • Common kitchenette

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
Walk Score®
Walker's Paradise (92)
What is a Walk Score®, Transit Score® & Bike Score®?
Walk Score® measures the walkability of any address.
Transit Score® measures access to public transit.
Bike Score® measures bikeability of a location.
What is a Walk Score®
, Transit Score® & Bike Score?
Walk Score® measures the walkability
of any address. Transit Score®
measures access to public transit. Bike Score®
measures bikeability of a location.®
  • Listing ID: 28251431

  • Date on Market: 6/16/2025

  • Last Updated:

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

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