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Stewart Plaza 400 N Mountain Ave 555 - 19,070 SF of Space Available in Upland, CA 91786

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HIGHLIGHTS

  • Call to tour.
  • Many retail amenities close by.

ALL AVAILABLE SPACES(7)

Display Rental Rate as

  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 1st Floor, Ste 101
  • 2,800-5,974 SF
  • Negotiable
  • $33.00 /SF/YR $2.75 /SF/MO $197,142 /YR $16,429 /MO
  • Office/Medical
  • Shell Space
  • Now

Shell space available. Ideal For Office + Medical Uses. Surrounded by Many Retail Amenities. Executive Suites Available as well.

  • Rate includes utilities, building services and property expenses
  • 1st Floor, Ste 104
  • 3,174-5,974 SF
  • Negotiable
  • $33.00 /SF/YR $2.75 /SF/MO $197,142 /YR $16,429 /MO
  • Office/Medical
  • Shell Space
  • Now

Shell space available. Ideal For Office + Medical Uses. Surrounded by Many Retail Amenities. Executive Suites Available as well.

  • Rate includes utilities, building services and property expenses
  • 2nd Floor, Ste 211
  • 1,540 SF
  • Negotiable
  • $30.00 /SF/YR $2.50 /SF/MO $46,200 /YR $3,850 /MO
  • Office
  • Full Build-Out
  • Now

2 Offices, Bullpen

  • Rate includes utilities, building services and property expenses
  • 3 Private Offices
  • Fully Built-Out as Standard Office
  • 2nd Floor, Ste 215
  • 1,815 SF
  • Negotiable
  • $30.00 /SF/YR $2.50 /SF/MO $54,450 /YR $4,538 /MO
  • Office
  • Full Build-Out
  • 30 Days

3 Offices, Bullpen

  • Rate includes utilities, building services and property expenses
  • 3 Private Offices
  • Fully Built-Out as Standard Office
  • 2nd Floor, Ste 237
  • 662 SF
  • Negotiable
  • $30.00 /SF/YR $2.50 /SF/MO $19,860 /YR $1,655 /MO
  • Office
  • Full Build-Out
  • 30 Days

2 Offices

  • Rate includes utilities, building services and property expenses
  • 3 Private Offices
  • Fully Built-Out as Standard Office
  • 2nd Floor, Ste 249
  • 555 SF
  • Negotiable
  • $30.00 /SF/YR $2.50 /SF/MO $16,650 /YR $1,388 /MO
  • Office
  • Full Build-Out
  • 30 Days

Executive Suite

  • Rate includes utilities, building services and property expenses
  • 3 Private Offices
  • Fully Built-Out as Standard Office
  • 3rd Floor, Ste 300
  • 2,550 SF
  • Negotiable
  • $30.00 /SF/YR $2.50 /SF/MO $76,500 /YR $6,375 /MO
  • Office/Medical
  • Full Build-Out
  • Now

Built-out medical space available. Reception, 5 Exam Rooms, Lab, Breakroom, Nurses Station, Doctor's Office. Elevator Served. Surrounded by Many Retail Amenities. Executive Suites Available as well.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Medical Space
Space Size Term Rental Rate Space Use Condition Available
1st Floor, Ste 101 2,800-5,974 SF Negotiable $33.00 /SF/YR $2.75 /SF/MO $197,142 /YR $16,429 /MO Office/Medical Shell Space Now
1st Floor, Ste 104 3,174-5,974 SF Negotiable $33.00 /SF/YR $2.75 /SF/MO $197,142 /YR $16,429 /MO Office/Medical Shell Space Now
2nd Floor, Ste 211 1,540 SF Negotiable $30.00 /SF/YR $2.50 /SF/MO $46,200 /YR $3,850 /MO Office Full Build-Out Now
2nd Floor, Ste 215 1,815 SF Negotiable $30.00 /SF/YR $2.50 /SF/MO $54,450 /YR $4,538 /MO Office Full Build-Out 30 Days
2nd Floor, Ste 237 662 SF Negotiable $30.00 /SF/YR $2.50 /SF/MO $19,860 /YR $1,655 /MO Office Full Build-Out 30 Days
2nd Floor, Ste 249 555 SF Negotiable $30.00 /SF/YR $2.50 /SF/MO $16,650 /YR $1,388 /MO Office Full Build-Out 30 Days
3rd Floor, Ste 300 2,550 SF Negotiable $30.00 /SF/YR $2.50 /SF/MO $76,500 /YR $6,375 /MO Office/Medical Full Build-Out Now

1st Floor, Ste 101

Size
2,800-5,974 SF
Term
Negotiable
Rental Rate
$33.00 /SF/YR $2.75 /SF/MO $197,142 /YR $16,429 /MO
Space Use
Office/Medical
Condition
Shell Space
Available
Now

1st Floor, Ste 104

Size
3,174-5,974 SF
Term
Negotiable
Rental Rate
$33.00 /SF/YR $2.75 /SF/MO $197,142 /YR $16,429 /MO
Space Use
Office/Medical
Condition
Shell Space
Available
Now

2nd Floor, Ste 211

Size
1,540 SF
Term
Negotiable
Rental Rate
$30.00 /SF/YR $2.50 /SF/MO $46,200 /YR $3,850 /MO
Space Use
Office
Condition
Full Build-Out
Available
Now

2nd Floor, Ste 215

Size
1,815 SF
Term
Negotiable
Rental Rate
$30.00 /SF/YR $2.50 /SF/MO $54,450 /YR $4,538 /MO
Space Use
Office
Condition
Full Build-Out
Available
30 Days

2nd Floor, Ste 237

Size
662 SF
Term
Negotiable
Rental Rate
$30.00 /SF/YR $2.50 /SF/MO $19,860 /YR $1,655 /MO
Space Use
Office
Condition
Full Build-Out
Available
30 Days

2nd Floor, Ste 249

Size
555 SF
Term
Negotiable
Rental Rate
$30.00 /SF/YR $2.50 /SF/MO $16,650 /YR $1,388 /MO
Space Use
Office
Condition
Full Build-Out
Available
30 Days

3rd Floor, Ste 300

Size
2,550 SF
Term
Negotiable
Rental Rate
$30.00 /SF/YR $2.50 /SF/MO $76,500 /YR $6,375 /MO
Space Use
Office/Medical
Condition
Full Build-Out
Available
Now

1st Floor, Ste 101

Size 2,800-5,974 SF
Term Negotiable
Rental Rate $33.00 /SF/YR
Space Use Office/Medical
Condition Shell Space
Available Now

Shell space available. Ideal For Office + Medical Uses. Surrounded by Many Retail Amenities. Executive Suites Available as well.

  • Rate includes utilities, building services and property expenses

1st Floor, Ste 104

Size 3,174-5,974 SF
Term Negotiable
Rental Rate $33.00 /SF/YR
Space Use Office/Medical
Condition Shell Space
Available Now

Shell space available. Ideal For Office + Medical Uses. Surrounded by Many Retail Amenities. Executive Suites Available as well.

  • Rate includes utilities, building services and property expenses

2nd Floor, Ste 211

Size 1,540 SF
Term Negotiable
Rental Rate $30.00 /SF/YR
Space Use Office
Condition Full Build-Out
Available Now

2 Offices, Bullpen

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • 3 Private Offices

2nd Floor, Ste 215

Size 1,815 SF
Term Negotiable
Rental Rate $30.00 /SF/YR
Space Use Office
Condition Full Build-Out
Available 30 Days

3 Offices, Bullpen

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • 3 Private Offices

2nd Floor, Ste 237

Size 662 SF
Term Negotiable
Rental Rate $30.00 /SF/YR
Space Use Office
Condition Full Build-Out
Available 30 Days

2 Offices

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • 3 Private Offices

2nd Floor, Ste 249

Size 555 SF
Term Negotiable
Rental Rate $30.00 /SF/YR
Space Use Office
Condition Full Build-Out
Available 30 Days

Executive Suite

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • 3 Private Offices

3rd Floor, Ste 300

Size 2,550 SF
Term Negotiable
Rental Rate $30.00 /SF/YR
Space Use Office/Medical
Condition Full Build-Out
Available Now

Built-out medical space available. Reception, 5 Exam Rooms, Lab, Breakroom, Nurses Station, Doctor's Office. Elevator Served. Surrounded by Many Retail Amenities. Executive Suites Available as well.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Medical Space

PROPERTY OVERVIEW

Surrounded by Many Retail Amenities. In Close Proximity to 10 & 210 Freeways. Heavy Parking with Easy Access. Elevator Served. Ideal For Office + Medical Uses.

  • Atrium
  • Signage

PROPERTY FACTS

Building Type
Office
Year Built/Renovated
1987/2021
Building Height
3 Stories
Building Size
47,850 SF
Building Class
B
Typical Floor Size
15,950 SF
Unfinished Ceiling Height
12’
Parking
140 Surface Parking Spaces
Surface Tandem Parking
Covered Parking
Covered Tandem Parking
Reserved Parking
Walk Score®
Very Walkable (76)
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: 29858508

  • Date on Market: 11/3/2025

  • Last Updated:

  • Address: 400 N Mountain Ave, Upland, CA 91786

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