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Park Highlights

  • Waterside Center consists of two Class A multi-tenant office buildings constructed in 2005 and 2007.
  • Ontario International Airport is located within close proximity to the campus.
  • Ample on-site parking is available with a 4 per 1,000 parking ratio.
  • The property offers visibility from Interstate 10 and convenient access to Interstate 15.
  • Professional management supports the operation and maintenance of the property.
  • Nearby retail, dining, and service amenities provide convenience for employees and visitors.

Park Facts

Total Space Available 33,781 SF
Min. Divisible 768 SF
Park Type Office Park

All Available Spaces(6)

Display Rental Rate as

Waterside Center
3200 E Guasti Rd
3,823 - 18,271 SF | $34.20 /SF/YR $2.85 /SF/MO $368.13 /m²/YR $30.68 /m²/MO $20,588 - $52,072 /MO $247,061 - $624,868 /YR | View Building Details
Building Type/Class
Office/A
Year Built
2007
Building Size
67,735 SF
Building Height
3 Stories
Typical Floor Size
22,578 SF
Parking
271 Spaces
  • Space
  • Size
  • Term
  • Rental Rate
  • Space Use
  • Build-Out
  • Available
  • 2nd Floor, Ste 200
  • 7,224 SF
  • Negotiable
  • $34.20 /SF/YR $2.85 /SF/MO $247,061 /YR $20,588 /MO
  • Office
  • Full Build-Out
  • 60 Days

Features a reception area, six private offices, conference room, breakroom, and bullpen areas with workstations. The existing improvements support immediate office occupancy.

  • Rate includes utilities, building services and property expenses
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Natural Light
  • Open-Plan
  • Wheelchair Accessible
  • Existing workstation bullpens
  • Open workspace with collaborative layout
  • Fully Built-Out as Standard Office
  • 6 Private Offices
  • Central Air and Heating
  • After Hours HVAC Available
  • Smoke Detector
  • Six private offices
  • Conference room included
  • Breakroom for staff convenience onsite
  • 2nd Floor, Ste 260
  • 3,823-11,047 SF
  • Negotiable
  • $34.20 /SF/YR $2.85 /SF/MO $377,807 /YR $31,484 /MO
  • Office
  • Full Build-Out
  • Now

Includes a reception area, four private offices, conference room, IT/storage room, and bullpen areas with workstations. The layout provides a mix of private offices and open workspace.

  • Rate includes utilities, building services and property expenses
  • Mostly Open Floor Plan Layout
  • 1 Conference Room
  • Reception Area
  • Elevator Access
  • After Hours HVAC Available
  • Smoke Detector
  • Four private offices
  • Open workstation bullpen
  • Fully Built-Out as Standard Office
  • 4 Private Offices
  • Central Air and Heating
  • Wi-Fi Connectivity
  • Natural Light
  • Open-Plan
  • Wheelchair Accessible
  • IT and storage room
Space Size Term Rental Rate Space Use Build-Out Available
2nd Floor, Ste 200 7,224 SF Negotiable $34.20 /SF/YR $2.85 /SF/MO $247,061 /YR $20,588 /MO Office Full Build-Out 60 Days
2nd Floor, Ste 260 3,823-11,047 SF Negotiable $34.20 /SF/YR $2.85 /SF/MO $377,807 /YR $31,484 /MO Office Full Build-Out Now
Waterside Center
3200 E Guasti Rd
3,823 - 18,271 SF | $34.20 /SF/YR $2.85 /SF/MO $368.13 /m²/YR $30.68 /m²/MO $20,588 - $52,072 /MO $247,061 - $624,868 /YR | View Building Details
Building Type/Class
Office/A
Year Built
2007
Building Size
67,735 SF
Building Height
3 Stories
Typical Floor Size
22,578 SF
Parking
271 Spaces

3200 E Guasti Rd - 2nd Floor - Ste 200

Size
7,224 SF
Term
Negotiable
Rental Rate
$34.20 /SF/YR $2.85 /SF/MO $247,061 /YR $20,588 /MO
Space Use
Office
Build-Out
Full Build-Out
Available
60 Days

3200 E Guasti Rd - 2nd Floor - Ste 260

Size
3,823-11,047 SF
Term
Negotiable
Rental Rate
$34.20 /SF/YR $2.85 /SF/MO $377,807 /YR $31,484 /MO
Space Use
Office
Build-Out
Full Build-Out
Available
Now
Waterside Center
3110 E Guasti Rd
768 - 15,510 SF | $34.20 /SF/YR $2.85 /SF/MO $368.13 /m²/YR $30.68 /m²/MO $2,189 - $44,204 /MO $26,266 - $530,442 /YR | View Building Details
Building Type/Class
Office/A
Year Built
2005
Building Size
91,683 SF
Building Height
5 Stories
Typical Floor Size
18,337 SF
Parking
367 Spaces
  • Space
  • Size
  • Term
  • Rental Rate
  • Space Use
  • Build-Out
  • Available
  • 2nd Floor, Ste 235,265-275
  • 947-953 SF
  • Negotiable
  • $34.20 /SF/YR $2.85 /SF/MO $32,593 /YR $2,716 /MO
  • Office
  • Full Build-Out
  • Now

Open floor plan configuration featuring a training room equipped with audiovisual equipment. The layout supports collaborative work, employee training, and flexible workspace arrangements.

  • Rate includes utilities, building services and property expenses
  • Open Floor Plan Layout
  • Wi-Fi Connectivity
  • Natural Light
  • Open-Plan
  • Wheelchair Accessible
  • Training room with AV
  • Fully Built-Out as Standard Office
  • Central Air and Heating
  • Elevator Access
  • After Hours HVAC Available
  • Smoke Detector
  • Open collaborative workspace
  • Flexible office layout
  • 3rd Floor, Ste 300
  • 8,653 SF
  • Negotiable
  • $34.20 /SF/YR $2.85 /SF/MO $295,933 /YR $24,661 /MO
  • Office
  • Full Build-Out
  • Now

Features a reception area, six private offices, a conference room, a large bullpen area, and a dedicated storage/IT room. The layout accommodates both private and collaborative work environments.

  • Rate includes utilities, building services and property expenses
  • 6 Private Offices
  • Central Air and Heating
  • Wi-Fi Connectivity
  • Natural Light
  • Smoke Detector
  • Reception and conference room
  • Large bullpen workspace
  • Fully Built-Out as Standard Office
  • 1 Conference Room
  • Reception Area
  • Elevator Access
  • Open-Plan
  • Wheelchair Accessible
  • Six private offices
  • 3rd Floor, Ste 320
  • 768 SF
  • Negotiable
  • $34.20 /SF/YR $2.85 /SF/MO $26,266 /YR $2,189 /MO
  • Office
  • Full Build-Out
  • Now

Includes a reception area, two private offices, and a breakroom. The efficient layout supports professional office operations with dedicated client-facing and employee support areas.

  • Rate includes utilities, building services and property expenses
  • 2 Private Offices
  • Reception Area
  • Two private offices
  • Fully Built-Out as Standard Office
  • Space is in Excellent Condition
  • Reception area included
  • Private breakroom space
  • 5th Floor, Ste 520
  • 5,136 SF
  • Negotiable
  • $34.20 /SF/YR $2.85 /SF/MO $175,651 /YR $14,638 /MO
  • Office
  • Full Build-Out
  • 60 Days

Built out with a reception area, conference room, private office, large bullpen with existing cubicles, and a breakroom. The layout provides a combination of collaborative and individual workspaces.

  • Rate includes utilities, building services and property expenses
  • Open Floor Plan Layout
  • 1 Conference Room
  • Existing cubicle layout
  • Reception and breakroom
  • Fully Built-Out as Standard Office
  • 1 Private Office
  • Reception Area
  • Conference room included
Space Size Term Rental Rate Space Use Build-Out Available
2nd Floor, Ste 235,265-275 947-953 SF Negotiable $34.20 /SF/YR $2.85 /SF/MO $32,593 /YR $2,716 /MO Office Full Build-Out Now
3rd Floor, Ste 300 8,653 SF Negotiable $34.20 /SF/YR $2.85 /SF/MO $295,933 /YR $24,661 /MO Office Full Build-Out Now
3rd Floor, Ste 320 768 SF Negotiable $34.20 /SF/YR $2.85 /SF/MO $26,266 /YR $2,189 /MO Office Full Build-Out Now
5th Floor, Ste 520 5,136 SF Negotiable $34.20 /SF/YR $2.85 /SF/MO $175,651 /YR $14,638 /MO Office Full Build-Out 60 Days
Waterside Center
3110 E Guasti Rd
768 - 15,510 SF | $34.20 /SF/YR $2.85 /SF/MO $368.13 /m²/YR $30.68 /m²/MO $2,189 - $44,204 /MO $26,266 - $530,442 /YR | View Building Details
Building Type/Class
Office/A
Year Built
2005
Building Size
91,683 SF
Building Height
5 Stories
Typical Floor Size
18,337 SF
Parking
367 Spaces

3110 E Guasti Rd - 2nd Floor - Ste 235,265-275

Size
947-953 SF
Term
Negotiable
Rental Rate
$34.20 /SF/YR $2.85 /SF/MO $32,593 /YR $2,716 /MO
Space Use
Office
Build-Out
Full Build-Out
Available
Now

3110 E Guasti Rd - 3rd Floor - Ste 300

Size
8,653 SF
Term
Negotiable
Rental Rate
$34.20 /SF/YR $2.85 /SF/MO $295,933 /YR $24,661 /MO
Space Use
Office
Build-Out
Full Build-Out
Available
Now

3110 E Guasti Rd - 3rd Floor - Ste 320

Size
768 SF
Term
Negotiable
Rental Rate
$34.20 /SF/YR $2.85 /SF/MO $26,266 /YR $2,189 /MO
Space Use
Office
Build-Out
Full Build-Out
Available
Now

3110 E Guasti Rd - 5th Floor - Ste 520

Size
5,136 SF
Term
Negotiable
Rental Rate
$34.20 /SF/YR $2.85 /SF/MO $175,651 /YR $14,638 /MO
Space Use
Office
Build-Out
Full Build-Out
Available
60 Days

3200 E Guasti Rd - 2nd Floor - Ste 200

Size 7,224 SF
Term Negotiable
Rental Rate $34.20 /SF/YR
Space Use Office
Build-Out Full Build-Out
Available 60 Days

Features a reception area, six private offices, conference room, breakroom, and bullpen areas with workstations. The existing improvements support immediate office occupancy.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • 6 Private Offices
  • Space is in Excellent Condition
  • Central Air and Heating
  • Natural Light
  • After Hours HVAC Available
  • Open-Plan
  • Smoke Detector
  • Wheelchair Accessible
  • Six private offices
  • Existing workstation bullpens
  • Conference room included
  • Open workspace with collaborative layout
  • Breakroom for staff convenience onsite

3200 E Guasti Rd - 2nd Floor - Ste 260

Size 3,823-11,047 SF
Term Negotiable
Rental Rate $34.20 /SF/YR
Space Use Office
Build-Out Full Build-Out
Available Now

Includes a reception area, four private offices, conference room, IT/storage room, and bullpen areas with workstations. The layout provides a mix of private offices and open workspace.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • 4 Private Offices
  • 1 Conference Room
  • Central Air and Heating
  • Reception Area
  • Wi-Fi Connectivity
  • Elevator Access
  • Natural Light
  • After Hours HVAC Available
  • Open-Plan
  • Smoke Detector
  • Wheelchair Accessible
  • Four private offices
  • IT and storage room
  • Open workstation bullpen

3110 E Guasti Rd - 2nd Floor - Ste 235,265-275

Size 947-953 SF
Term Negotiable
Rental Rate $34.20 /SF/YR
Space Use Office
Build-Out Full Build-Out
Available Now

Open floor plan configuration featuring a training room equipped with audiovisual equipment. The layout supports collaborative work, employee training, and flexible workspace arrangements.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • Open Floor Plan Layout
  • Central Air and Heating
  • Wi-Fi Connectivity
  • Elevator Access
  • Natural Light
  • After Hours HVAC Available
  • Open-Plan
  • Smoke Detector
  • Wheelchair Accessible
  • Open collaborative workspace
  • Training room with AV
  • Flexible office layout

3110 E Guasti Rd - 3rd Floor - Ste 300

Size 8,653 SF
Term Negotiable
Rental Rate $34.20 /SF/YR
Space Use Office
Build-Out Full Build-Out
Available Now

Features a reception area, six private offices, a conference room, a large bullpen area, and a dedicated storage/IT room. The layout accommodates both private and collaborative work environments.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • 6 Private Offices
  • 1 Conference Room
  • Central Air and Heating
  • Reception Area
  • Wi-Fi Connectivity
  • Elevator Access
  • Natural Light
  • Open-Plan
  • Smoke Detector
  • Wheelchair Accessible
  • Reception and conference room
  • Six private offices
  • Large bullpen workspace

3110 E Guasti Rd - 3rd Floor - Ste 320

Size 768 SF
Term Negotiable
Rental Rate $34.20 /SF/YR
Space Use Office
Build-Out Full Build-Out
Available Now

Includes a reception area, two private offices, and a breakroom. The efficient layout supports professional office operations with dedicated client-facing and employee support areas.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • 2 Private Offices
  • Space is in Excellent Condition
  • Reception Area
  • Reception area included
  • Two private offices
  • Private breakroom space

3110 E Guasti Rd - 5th Floor - Ste 520

Size 5,136 SF
Term Negotiable
Rental Rate $34.20 /SF/YR
Space Use Office
Build-Out Full Build-Out
Available 60 Days

Built out with a reception area, conference room, private office, large bullpen with existing cubicles, and a breakroom. The layout provides a combination of collaborative and individual workspaces.

  • Rate includes utilities, building services and property expenses
  • Fully Built-Out as Standard Office
  • Open Floor Plan Layout
  • 1 Private Office
  • 1 Conference Room
  • Reception Area
  • Existing cubicle layout
  • Conference room included
  • Reception and breakroom

Park Overview

Waterside Center is a Class A office campus comprising two multi-tenant office buildings located at 3110 and 3200 E. Guasti Road in Ontario, California. Constructed in 2005 and 2007, the property offers a professionally managed business environment designed to support a diverse range of office users. The campus encompasses approximately 159,270 square feet and benefits from a highly accessible location west of Interstate 15 with visibility from Interstate 10. Waterside Center is positioned near Ontario International Airport, Ontario Mills, and a wide selection of retail, dining, and service amenities, providing convenience for employees and visitors alike. The property features an on-site parking ratio of 4 spaces per 1,000 square feet and is maintained under professional management. Its established corporate setting, modern construction, and proximity to major transportation corridors make Waterside Center a well-located office destination within the Inland Empire business market.

Fairly walkable
40/100
Exceptionally drivable
100/100
Minimal public transit
10/100
Fairly bikeable
40/100
  • Listing ID: 41859602

  • Date on Market: 7/14/2026

  • Last Updated:

  • Address: 3110 E Guasti Rd, Ontario, CA 91761

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