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Mountain Grove Office Park Upland, CA 91786 176 - 23,058 SF of Office Space Available

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PARK HIGHLIGHTS

  • Professional office campus with meticulous landscaping and ample outdoor seating areas.
  • Larger suites available with a mix of offices and open areas.
  • Mini-suites available with access to a shared conference room and break room.
  • Within walking distance to multiple dining options, with more options just a short drive away.
  • Surrounded by public parks featuring plentiful green space and picnic areas.

PARK FACTS

Total Space Available 23,058 SF
Min. Divisible 176 SF
Park Type Office Park

ALL AVAILABLE SPACES(14)

Display Rental Rate as

Mountain Grove Office Park
820 N Mountain Ave
913 - 3,108 SF | $23.95 - $29.31 CAD/SF/YR $2.00 - $2.44 CAD/SF/MO $257.84 - $315.54 CAD/m²/YR $21.49 - $26.29 CAD/m²/MO $2,230 - $6,612 CAD/MO $26,764 - $79,343 CAD/YR | View Building Details
Building Type/Class
Office/B
Year Built
1982
Building Size
25,808 SF
Building Height
2 Stories
Typical Floor Size
12,904 SF
Parking
75 Spaces
  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 1st Floor, Ste 102
  • 2,195 SF
  • Negotiable
  • $23.95 CAD/SF/YR $2.00 CAD/SF/MO $52,579 CAD/YR $4,382 CAD/MO
  • Office
  • -
  • 30 Days

Existing eye clinic; Reception, 4 window offices, 4 offices, work station with sink and open area. Subsidized rental rate until April 2026: $2,860 per month. Previous tenant will leave video cameras, alarm system, routers, WiFi.

  • Rate includes utilities, building services and property expenses
  • Fits 6 - 18 People
  • 2nd Floor, Ste 235
  • 913 SF
  • Negotiable
  • $29.31 CAD/SF/YR $2.44 CAD/SF/MO $26,764 CAD/YR $2,230 CAD/MO
  • Office
  • -
  • 30 Days

Large open area, 2 offices and storage room)

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 8 People
Space Size Term Rental Rate Space Use Condition Available
1st Floor, Ste 102 2,195 SF Negotiable $23.95 CAD/SF/YR $2.00 CAD/SF/MO $52,579 CAD/YR $4,382 CAD/MO Office - 30 Days
2nd Floor, Ste 235 913 SF Negotiable $29.31 CAD/SF/YR $2.44 CAD/SF/MO $26,764 CAD/YR $2,230 CAD/MO Office - 30 Days
Mountain Grove Office Park
820 N Mountain Ave
913 - 3,108 SF | $23.95 - $29.31 CAD/SF/YR $2.00 - $2.44 CAD/SF/MO $257.84 - $315.54 CAD/m²/YR $21.49 - $26.29 CAD/m²/MO $2,230 - $6,612 CAD/MO $26,764 - $79,343 CAD/YR | View Building Details
Building Type/Class
Office/B
Year Built
1982
Building Size
25,808 SF
Building Height
2 Stories
Typical Floor Size
12,904 SF
Parking
75 Spaces

820 N Mountain Ave - 1st Floor - Ste 102

Size
2,195 SF
Term
Negotiable
Rental Rate
$23.95 CAD/SF/YR $2.00 CAD/SF/MO $52,579 CAD/YR $4,382 CAD/MO
Space Use
Office
Condition
-
Available
30 Days

820 N Mountain Ave - 2nd Floor - Ste 235

Size
913 SF
Term
Negotiable
Rental Rate
$29.31 CAD/SF/YR $2.44 CAD/SF/MO $26,764 CAD/YR $2,230 CAD/MO
Space Use
Office
Condition
-
Available
30 Days
Mountain Grove Office Park
870 N Mountain Ave
540 - 14,354 SF | $28.48 - $30.99 CAD/SF/YR $2.37 - $2.58 CAD/SF/MO $306.52 - $333.57 CAD/m²/YR $25.54 - $27.80 CAD/m²/MO $1,395 - $35,581 CAD/MO $16,734 - $426,971 CAD/YR | View Building Details
Building Type/Class
Office/B
Year Built
1982
Building Size
72,466 SF
Building Height
2 Stories
Typical Floor Size
30,823 SF
Parking
80 Spaces
  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 1st Floor, Ste 117
  • 1,158 SF
  • Negotiable
  • $29.31 CAD/SF/YR $2.44 CAD/SF/MO $33,946 CAD/YR $2,829 CAD/MO
  • Office
  • -
  • 30 Days

Large office and large open area.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 10 People
  • 1st Floor, Ste 121
  • 836-2,143 SF
  • Negotiable
  • $28.48 CAD/SF/YR $2.37 CAD/SF/MO $61,026 CAD/YR $5,085 CAD/MO
  • Office
  • Full Build-Out
  • 30 Days

Large open space. Rent includes electricity and excludes janitorial service.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 18 People
  • Open Floor Plan Layout
  • Open-Plan
  • 1st Floor, Ste 126
  • 1,307-2,143 SF
  • Negotiable
  • $28.48 CAD/SF/YR $2.37 CAD/SF/MO $61,026 CAD/YR $5,085 CAD/MO
  • Office
  • Full Build-Out
  • 30 Days

Large open area with windows and storage room.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 4 - 18 People
  • Open Floor Plan Layout
  • Open-Plan
  • 1st Floor, Ste 128
  • 3,070 SF
  • Negotiable
  • $29.31 CAD/SF/YR $2.44 CAD/SF/MO $89,995 CAD/YR $7,500 CAD/MO
  • Office
  • -
  • 30 Days

Double-entry glass doors, reception, 5 window offices, conference room, break room and open areas.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 8 - 25 People
  • 2nd Floor, Ste 205
  • 540 SF
  • Negotiable
  • $30.99 CAD/SF/YR $2.58 CAD/SF/MO $16,734 CAD/YR $1,395 CAD/MO
  • Office
  • -
  • 30 Days

Window office and large open area. Rent includes electricity and excludes janitorial service.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 2 - 5 People
  • 2nd Floor, Ste 209
  • 5,300 SF
  • Negotiable
  • $30.99 CAD/SF/YR $2.58 CAD/SF/MO $164,244 CAD/YR $13,687 CAD/MO
  • Office
  • -
  • 120 Days

8 window offices, large conference room, storage room and open area with 18 cubicles.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 14 - 43 People
Space Size Term Rental Rate Space Use Condition Available
1st Floor, Ste 117 1,158 SF Negotiable $29.31 CAD/SF/YR $2.44 CAD/SF/MO $33,946 CAD/YR $2,829 CAD/MO Office - 30 Days
1st Floor, Ste 121 836-2,143 SF Negotiable $28.48 CAD/SF/YR $2.37 CAD/SF/MO $61,026 CAD/YR $5,085 CAD/MO Office Full Build-Out 30 Days
1st Floor, Ste 126 1,307-2,143 SF Negotiable $28.48 CAD/SF/YR $2.37 CAD/SF/MO $61,026 CAD/YR $5,085 CAD/MO Office Full Build-Out 30 Days
1st Floor, Ste 128 3,070 SF Negotiable $29.31 CAD/SF/YR $2.44 CAD/SF/MO $89,995 CAD/YR $7,500 CAD/MO Office - 30 Days
2nd Floor, Ste 205 540 SF Negotiable $30.99 CAD/SF/YR $2.58 CAD/SF/MO $16,734 CAD/YR $1,395 CAD/MO Office - 30 Days
2nd Floor, Ste 209 5,300 SF Negotiable $30.99 CAD/SF/YR $2.58 CAD/SF/MO $164,244 CAD/YR $13,687 CAD/MO Office - 120 Days
Mountain Grove Office Park
870 N Mountain Ave
540 - 14,354 SF | $28.48 - $30.99 CAD/SF/YR $2.37 - $2.58 CAD/SF/MO $306.52 - $333.57 CAD/m²/YR $25.54 - $27.80 CAD/m²/MO $1,395 - $35,581 CAD/MO $16,734 - $426,971 CAD/YR | View Building Details
Building Type/Class
Office/B
Year Built
1982
Building Size
72,466 SF
Building Height
2 Stories
Typical Floor Size
30,823 SF
Parking
80 Spaces

870 N Mountain Ave - 1st Floor - Ste 117

Size
1,158 SF
Term
Negotiable
Rental Rate
$29.31 CAD/SF/YR $2.44 CAD/SF/MO $33,946 CAD/YR $2,829 CAD/MO
Space Use
Office
Condition
-
Available
30 Days

870 N Mountain Ave - 1st Floor - Ste 121

Size
836-2,143 SF
Term
Negotiable
Rental Rate
$28.48 CAD/SF/YR $2.37 CAD/SF/MO $61,026 CAD/YR $5,085 CAD/MO
Space Use
Office
Condition
Full Build-Out
Available
30 Days

870 N Mountain Ave - 1st Floor - Ste 126

Size
1,307-2,143 SF
Term
Negotiable
Rental Rate
$28.48 CAD/SF/YR $2.37 CAD/SF/MO $61,026 CAD/YR $5,085 CAD/MO
Space Use
Office
Condition
Full Build-Out
Available
30 Days

870 N Mountain Ave - 1st Floor - Ste 128

Size
3,070 SF
Term
Negotiable
Rental Rate
$29.31 CAD/SF/YR $2.44 CAD/SF/MO $89,995 CAD/YR $7,500 CAD/MO
Space Use
Office
Condition
-
Available
30 Days

870 N Mountain Ave - 2nd Floor - Ste 205

Size
540 SF
Term
Negotiable
Rental Rate
$30.99 CAD/SF/YR $2.58 CAD/SF/MO $16,734 CAD/YR $1,395 CAD/MO
Space Use
Office
Condition
-
Available
30 Days

870 N Mountain Ave - 2nd Floor - Ste 209

Size
5,300 SF
Term
Negotiable
Rental Rate
$30.99 CAD/SF/YR $2.58 CAD/SF/MO $164,244 CAD/YR $13,687 CAD/MO
Space Use
Office
Condition
-
Available
120 Days
Mountain Grove Office Park
818 N Mountain Ave
176 - 5,596 SF | Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates | View Building Details
Building Type/Class
Office/B
Year Built
1982
Building Size
78,328 SF
Building Height
2 Stories
Typical Floor Size
18,826 SF
Parking
80 Spaces
  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 2nd Floor, Ste 203B
  • 176 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • -
  • 30 Days

Mini suite. Rent rate is $495/month including electricity, janitorial service and free WIFI. Lobby and shared conference room and break room.

  • Fits 1 - 2 People
  • 2nd Floor, Ste 203F
  • 205 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • -
  • 30 Days

Window mini suite. Rent rate is $600/month including electricity, janitorial service and free WIFI. Lobby and shared conference room and break room.

  • Fits 1 - 2 People
  • 2nd Floor, Ste 203G
  • 290 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • -
  • 30 Days

Window mini suite; Rent: $750/month including electricity, janitorial service and free WIFI. Shared conference room and lobby.

  • Fits 1 - 3 People
  • 2nd Floor, Ste 206
  • 2,741 SF
  • 2 Years
  • $29.31 CAD/SF/YR $2.44 CAD/SF/MO $80,351 CAD/YR $6,696 CAD/MO
  • Office
  • -
  • 30 Days

Reception, 5 window offices, interior office, large conference room, storage room and open area.

  • Rate includes utilities, building services and property expenses
  • Fits 7 - 22 People
  • 2nd Floor, Ste 207
  • 1,129 SF
  • Negotiable
  • $30.99 CAD/SF/YR $2.58 CAD/SF/MO $34,987 CAD/YR $2,916 CAD/MO
  • Office
  • -
  • 30 Days

Reception, 2 window offices; 2 offices and storage room.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 10 People
  • 2nd Floor, Ste 209
  • 1,055 SF
  • Negotiable
  • $30.99 CAD/SF/YR $2.58 CAD/SF/MO $32,694 CAD/YR $2,724 CAD/MO
  • Office
  • -
  • 30 Days

2 window offices, 2 interior offices and open area.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 9 People
Space Size Term Rental Rate Space Use Condition Available
2nd Floor, Ste 203B 176 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office - 30 Days
2nd Floor, Ste 203F 205 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office - 30 Days
2nd Floor, Ste 203G 290 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office - 30 Days
2nd Floor, Ste 206 2,741 SF 2 Years $29.31 CAD/SF/YR $2.44 CAD/SF/MO $80,351 CAD/YR $6,696 CAD/MO Office - 30 Days
2nd Floor, Ste 207 1,129 SF Negotiable $30.99 CAD/SF/YR $2.58 CAD/SF/MO $34,987 CAD/YR $2,916 CAD/MO Office - 30 Days
2nd Floor, Ste 209 1,055 SF Negotiable $30.99 CAD/SF/YR $2.58 CAD/SF/MO $32,694 CAD/YR $2,724 CAD/MO Office - 30 Days
Mountain Grove Office Park
818 N Mountain Ave
176 - 5,596 SF | Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates Multiple Rental Rates | View Building Details
Building Type/Class
Office/B
Year Built
1982
Building Size
78,328 SF
Building Height
2 Stories
Typical Floor Size
18,826 SF
Parking
80 Spaces

818 N Mountain Ave - 2nd Floor - Ste 203B

Size
176 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
-
Available
30 Days

818 N Mountain Ave - 2nd Floor - Ste 203F

Size
205 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
-
Available
30 Days

818 N Mountain Ave - 2nd Floor - Ste 203G

Size
290 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
-
Available
30 Days

818 N Mountain Ave - 2nd Floor - Ste 206

Size
2,741 SF
Term
2 Years
Rental Rate
$29.31 CAD/SF/YR $2.44 CAD/SF/MO $80,351 CAD/YR $6,696 CAD/MO
Space Use
Office
Condition
-
Available
30 Days

818 N Mountain Ave - 2nd Floor - Ste 207

Size
1,129 SF
Term
Negotiable
Rental Rate
$30.99 CAD/SF/YR $2.58 CAD/SF/MO $34,987 CAD/YR $2,916 CAD/MO
Space Use
Office
Condition
-
Available
30 Days

818 N Mountain Ave - 2nd Floor - Ste 209

Size
1,055 SF
Term
Negotiable
Rental Rate
$30.99 CAD/SF/YR $2.58 CAD/SF/MO $32,694 CAD/YR $2,724 CAD/MO
Space Use
Office
Condition
-
Available
30 Days

820 N Mountain Ave - 1st Floor - Ste 102

Size 2,195 SF
Term Negotiable
Rental Rate $23.95 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

Existing eye clinic; Reception, 4 window offices, 4 offices, work station with sink and open area. Subsidized rental rate until April 2026: $2,860 per month. Previous tenant will leave video cameras, alarm system, routers, WiFi.

  • Rate includes utilities, building services and property expenses
  • Fits 6 - 18 People

820 N Mountain Ave - 2nd Floor - Ste 235

Size 913 SF
Term Negotiable
Rental Rate $29.31 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

Large open area, 2 offices and storage room)

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 8 People

870 N Mountain Ave - 1st Floor - Ste 117

Size 1,158 SF
Term Negotiable
Rental Rate $29.31 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

Large office and large open area.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 10 People

870 N Mountain Ave - 1st Floor - Ste 121

Size 836-2,143 SF
Term Negotiable
Rental Rate $28.48 CAD/SF/YR
Space Use Office
Condition Full Build-Out
Available 30 Days

Large open space. Rent includes electricity and excludes janitorial service.

  • Listed rate may not include certain utilities, building services and property expenses
  • Open Floor Plan Layout
  • Fits 3 - 18 People
  • Open-Plan

870 N Mountain Ave - 1st Floor - Ste 126

Size 1,307-2,143 SF
Term Negotiable
Rental Rate $28.48 CAD/SF/YR
Space Use Office
Condition Full Build-Out
Available 30 Days

Large open area with windows and storage room.

  • Listed rate may not include certain utilities, building services and property expenses
  • Open Floor Plan Layout
  • Fits 4 - 18 People
  • Open-Plan

870 N Mountain Ave - 1st Floor - Ste 128

Size 3,070 SF
Term Negotiable
Rental Rate $29.31 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

Double-entry glass doors, reception, 5 window offices, conference room, break room and open areas.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 8 - 25 People

870 N Mountain Ave - 2nd Floor - Ste 205

Size 540 SF
Term Negotiable
Rental Rate $30.99 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

Window office and large open area. Rent includes electricity and excludes janitorial service.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 2 - 5 People

870 N Mountain Ave - 2nd Floor - Ste 209

Size 5,300 SF
Term Negotiable
Rental Rate $30.99 CAD/SF/YR
Space Use Office
Condition -
Available 120 Days

8 window offices, large conference room, storage room and open area with 18 cubicles.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 14 - 43 People

818 N Mountain Ave - 2nd Floor - Ste 203B

Size 176 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition -
Available 30 Days

Mini suite. Rent rate is $495/month including electricity, janitorial service and free WIFI. Lobby and shared conference room and break room.

  • Fits 1 - 2 People

818 N Mountain Ave - 2nd Floor - Ste 203F

Size 205 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition -
Available 30 Days

Window mini suite. Rent rate is $600/month including electricity, janitorial service and free WIFI. Lobby and shared conference room and break room.

  • Fits 1 - 2 People

818 N Mountain Ave - 2nd Floor - Ste 203G

Size 290 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition -
Available 30 Days

Window mini suite; Rent: $750/month including electricity, janitorial service and free WIFI. Shared conference room and lobby.

  • Fits 1 - 3 People

818 N Mountain Ave - 2nd Floor - Ste 206

Size 2,741 SF
Term 2 Years
Rental Rate $29.31 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

Reception, 5 window offices, interior office, large conference room, storage room and open area.

  • Rate includes utilities, building services and property expenses
  • Fits 7 - 22 People

818 N Mountain Ave - 2nd Floor - Ste 207

Size 1,129 SF
Term Negotiable
Rental Rate $30.99 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

Reception, 2 window offices; 2 offices and storage room.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 10 People

818 N Mountain Ave - 2nd Floor - Ste 209

Size 1,055 SF
Term Negotiable
Rental Rate $30.99 CAD/SF/YR
Space Use Office
Condition -
Available 30 Days

2 window offices, 2 interior offices and open area.

  • Listed rate may not include certain utilities, building services and property expenses
  • Fits 3 - 9 People

PARK OVERVIEW

Strategically located on the corner of Mountain Avenue and 11th Street, the Mountain Grove Office Park is a well-maintained office campus with numerous surrounding amenities. Comprised of four buildings totaling ± 149,414-SF, the buildings are elevator-served, and the campus features ample parking, attractive landscaping, and abundant outdoor seating. For convenient commuting access, employees and guests alike enjoy just a five-minute drive to both the Interstate 210 and Interstate 10 freeways. Located just south of the established commercial corridor on Foothill Boulevard, the Upland Shopping Centre and the Vanguard Centre are less than a 10-minute walk away and feature numerous quick-service dining options and a FedEx Office Print & Ship Center for before, during, and after working hours. Even more restaurants, shops, fitness facilities, and retail conveniences amenities are located just a short drive away. Additionally, the Mountain Grove Office Park is located next to the Baldy View Dog Park’s abundant green space, and it is just a 10-minute walk to Cabrillo Park’s sports areas and picnic spots.

Walk Score®
Very Walkable (83)
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: 13186715

  • Date on Market: 2025-10-16

  • Last Updated:

  • Address: 870 N Mountain Ave, Upland, CA 91786

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