Map of Property

Stewart Plaza

For Lease

400 N Mountain Ave, Upland, CA 91786

The total number of office spaces available at Stewart Plaza is 10. Leasing opportunities in the building include general office. There is a total of 13,697 square feet of space currently available for rent at this address. Of this, the minimum divisible area is 230 square feet.

Space Available For Lease 10

Contacts

Brian Melkesian

Lee & Associates

Property Details

  • Property Type Office - General Office
  • Property Size 41,732 SF
  • Lot Size 3.96 Acre
  • Parking Spaces Avail. 167
  • Parking Ratio 4.00 / 1,000 SF
  • Property Tenancy Multi-Tenant
  • Building Class B
  • Year Built 1987
  • Date Updated Feb 2, 2026
Reception, 4 Offices, Break Area Elevator Served Ideal For Office + Medical Uses Heavy Parking with Easy Access Executive Suites Available as well Surrounded by Many Retail Amenities In Close Proximity to 10 & 210 Freeways
Want more info on this listing?

Reach out to the broker for more info on lease terms and amenities

Getting around

  • 73/100

    Walk Score ®

  • 28/100

    Transit Score ®

  • 69/100

    Bike Score ®

Powered by Walk Score ®

Location

  • City Upland, CA
  • Zip Code 91786
  • Market Inland Empire

Points of Interest

  • Ontario

    2.77 miles

  • Claremont

    2.78 miles

  • Pomona–North

    4.82 miles

  • Rancho Cucamonga

    6.23 miles

  • East Ontario

    6.49 miles

  • Pacific Electric - Etiwanda Station

    8.51 miles

  • Thrifty

    0.15 miles

  • Chevron

    0.57 miles

  • Shell

    0.62 miles

  • USA Gasoline

    0.76 miles

  • eVgo

    0.80 miles

  • 76

    0.96 miles

  • Vons 2681 Fuel Station

    1.04 miles

  • Upland Village Center

    1.36 miles

  • Valero

    1.56 miles

  • Costco Gasoline

    1.58 miles

  • Senior/West Parking Lot

    0.62 miles

  • North/Sophomore Parking Lot

    0.82 miles

  • Montclair Transcenter Park And Ride

    1.51 miles

  • SARH Employee Parking

    1.68 miles

  • East Mesa Parking

    2.05 miles

  • Holden Parking

    2.11 miles

  • Sanborn Parking

    2.23 miles

  • Claremont Wilderness Park South Parking

    3.57 miles

  • Super 8

    0.75 miles

  • Western Inn

    1.98 miles

  • American Inn

    2.05 miles

  • Travelodge Ontario

    2.65 miles

  • Days Inn

    2.79 miles

  • Sands Motel

    2.91 miles

  • Star Motel

    2.92 miles

  • Rancho Motel

    2.95 miles

  • Mission Motel

    2.97 miles

  • Ontario Motor Inn

    2.97 miles

  • Grocery Outlet

    0.39 miles

  • Stater Bros.

    0.50 miles

  • Big Lots

    0.58 miles

  • ALDI

    0.63 miles

  • Smart & Final

    0.65 miles

  • Sprouts Farmers Market

    0.77 miles

  • Walmart

    0.78 miles

  • Marshalls

    1.00 miles

  • Vons

    1.11 miles

  • Walmart Supercenter

    1.12 miles

400 N Mountain Ave Listing Brief

  • Leasing rates here can depend on a variety of factors, including the quality rating of the property (property class or building class), the position of the available space within the building, any unique attributes that the listed space may include, as well as on the availability of on-site or nearby amenities. Reach out using the contact form available on this page to schedule a tour or to get more detailed information on the most modern facilities and amenities that 400 N Mountain Ave has to offer.

  • The property offers a parking ratio of 4.00 / 1,000 SF, which translates to a total of 167 parking spaces. See the listing area details for information and ratings regarding the degree of walkability in the neighborhood, the accessibility and frequency of public transit options, as well as the level of availability and quality of biking infrastructure in the area. What’s more, you can use the interactive map for a good overview of the area. Location details also include a breakdown of distance from the property to several essential amenities and points of interest, which may include parking facilities, fuel stations, stores, or hotels.

  • 400 N Mountain Ave was originally completed in 1987 and is rated class B. The building includes 41,732 square feet, of which 13,697 square feet is rentable office space.

Contact Listing Broker
Brian Melkesian

Lee & Associates

  1. 1Main information
  2. 2Extra information
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.