Ontario, CA Office Spaces for Rent

Find your best Ontario, CA office space among 64 for rent listings, which average an asking price of $29.34 per square foot.

Office Market FAQs

Cubework Airport ONT

3950 East Airport Drive, Ontario, CA
Property

Industrial

416,435 SF
Availability

2 Spaces

413,000 SF
For Lease Contact for pricing
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Superior Office Suites
ESDI - Superior Office Suites
337 North Vineyard Avenue Suite 400, Ontario, CA
Services

Virtual Office

Meeting Room

Private Office
Amenities

Catering

High-speed internet

High-speed wifi

Parking

Printer

Receptionist/Secretarial services

TV/Monitor
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Transpark Office Center

2910 Inland Empire Blvd, Ontario, CA
Property

Office

209,972 SF
Availability

6 Spaces

26,171 SF
Year Built

1981
For Lease

$2.45/SF/MO
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Waterside Center I

3200 East Guasti Road, Ontario, CA
Property

Office

72,589 SF
Availability

2 Spaces

35,016 SF
Year Built

2007
For Lease Contact for pricing
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Ontario Euclid Center

2501-2529 S. Euclid Avenue, Ontario, CA
Property

Office

31,236 SF
Availability

3 Spaces

5,618 SF
For Lease

$1.99 - $2.50/SF/MO
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Ontario Office Evolution
Office Evolution
3350 Shelby Street Suite 200, Ontario, CA
Services

Virtual Office

Open Workspace

Meeting Room
Amenities

Complimentary coffee & tea

High-speed wifi

Parking
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Empire Towers I

3633 Inland Empire Blvd, Ontario, CA
Property

Office

177,515 SF
Availability

6 Spaces

20,526 SF
Year Built

1990
For Lease Contact for pricing
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One Lakeshore
Regus
3281 E. Guasti Road #700, Ontario, CA
Services

Virtual Office

Open Workspace

Private Office

Dedicated Desk
Amenities

24/7 security

Access to global network

Business address

Business lounge

Cleaning services

Ergonomic furniture

Lounge area

Mail services

Money-back guarantee

Office furniture
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3237 E Guasti Rd

3237 E Guasti Rd, Ontario, CA
Property

Office

53,911 SF
Availability

1 Space

2,071 SF
Year Built

2006
For Lease

$2.05/SF/MO
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3400 Inland Empire Blvd

3400 Inland Empire Blvd, Ontario, CA
Property

Office

39,388 SF
Availability

5 Spaces

1,004.3 SF
Year Built

1990
For Lease Contact for pricing
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Empire Towers V

3990 Concours Street, Ontario, CA
Property

Office

124,529 SF
Availability

3 Spaces

20,320 SF
Year Built

2007
For Lease Contact for pricing
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Palm Brook Corporate Center - Bldg. A

3602 Inland Empire Blvd., Ontario, CA
Property

Office

13,400 SF
Availability

1 Space

1,724 SF
Year Built

1988
For Lease

$27.60/SF/YR
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990 Barrington Ave

990 Barrington Ave, Ontario, CA
Property

Office

289,793 SF
Availability

1 Space

289,940 SF
Year Built

2007
For Lease Contact for pricing
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1609 South Grove Avenue & 1240 & 1260 East Locust Street

1609 South Grove Avenue, Ontario, CA
Property

Industrial

79,548 SF
Availability

1 Space

1,950 SF
Year Built

1989
For Lease

$1.50/SF/MO
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3500 Porsche Way

3500 Porsche Way, Ontario, CA
Property

Office

44,525 SF
Availability

1 Space

11,270 SF
Year Built

1998
For Lease

$2.25/SF/MO
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Waterside Center
Regus
3200 Guasti Road Suite 100, Ontario, CA
Services

Virtual Office

Open Workspace

Private Office

Dedicated Desk
Amenities

24/7 security

Access to global network

Business address

Business lounge

Cleaning services

Ergonomic furniture

Lounge area

Mail services

Money-back guarantee

Office furniture
View Details (opens in new window)
1950A - 2000A S Grove Ave

1950A - 2000A S Grove Ave, Ontario, CA
Property

Office

15,900 SF
Availability

1 Space

1,450 SF
For Lease Contact for pricing
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Palm Brook Corporate Center - Bldg. B

3602 Inland Empire Blvd., Ontario, CA
Property

Office

15,365 SF
Availability

1 Space

2,415 SF
Year Built

1988
For Lease

$27.60/SF/YR
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Cubework Doubleday

1001 Doubleday Avenue, Ontario, CA
Property

Industrial

394,538 SF
Availability

2 Spaces

203,251 SF
Year Built

1987
For Lease Contact for pricing
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Centrelake Plaza

3401 Centre Lake Drive, Ontario, CA
Property

Office

114,420 SF
Availability

7 Spaces

41,308 SF
Year Built

1990
For Lease Contact for pricing
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Waterside Center III

3110 East Guasti Road, Ontario, CA
Property

Office

100,000 SF
Availability

5 Spaces

9,419 SF
Year Built

2005
For Lease

$28.80 - $31.80/SF/YR
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Palm Brook Corporate Center - Bldg. C

3602 Inland Empire Blvd., Ontario, CA
Property

Office

74,655 SF
Availability

5 Spaces

15,369 SF
Year Built

1988
For Lease

$27.60/SF/YR
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One Piemonte

901 Via Piemonte, Ontario, CA
Property

Office

122,500 SF
Availability

6 Spaces

24,366 SF
Year Built

2008
For Lease

$33.00/SF/YR
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Empire Towers II

4141 Inland Empire Blvd, Ontario, CA
Property

Office

70,021 SF
Availability

2 Spaces

10,934 SF
Year Built

2000
For Lease Contact for pricing
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Empire Executive Office Building
Empire Executive Offices
3400 Inland Empire Boulevard, Ontario, CA
Services

Virtual Office

Open Workspace

Meeting Room

Private Office
Amenities

Cleaning services

Complimentary coffee & tea

High-speed wifi

Kitchen

Mail services

Receptionist/Secretarial services

Utilities included
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1001 Doubleday Avenue
Cubework
1001 Doubleday Avenue, Ontario, CA
Services

Open Workspace

Meeting Room

Private Office

Dedicated Desk
Amenities

Break room

Cleaning services

Complimentary coffee & tea

Concierge

High-speed wifi

IT support

Kitchen

Loading docks

Mail services

Office furniture
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3950 East Airport Drive
Cubework
3950 East Airport Drive, Ontario, CA
Services

Meeting Room

Private Office

Dedicated Desk
Amenities

Cleaning services

Complimentary coffee & tea

Game room

Gym

Kitchen

Loading docks

Lockers

Mail services

Office supplies

Professional & social events
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740 Vintage Avenue
Cubework
740 Vintage Avenue, Ontario, CA
Services

Meeting Room

Private Office

Dedicated Desk
Amenities

Complimentary coffee & tea

Free water

High-speed wifi

Mail services

Parking

Printer

Professional & social events

Receptionist/Secretarial services

Utilities included
View Details (opens in new window)
Empire Office Center - Bldg 2

3595 Inland Empire Blvd, Ontario, CA
Property

Office

11,456 SF
Availability

1 Space

1,632 SF
Year Built

2005
For Lease

$2.00/SF/MO
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3491 Concours St

3491 Concours St, Ontario, CA
Property

Office

24,470 SF
Availability

1 Space

1,141 SF
For Lease Contact for pricing
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Palmetto Offices
Palmetto Offices
980 West 6th Street, Ontario, CA
Services

Open Workspace

Meeting Room

Private Office
Amenities

24/7 security

Cleaning services

Complimentary coffee & tea

High-speed wifi

Kitchen

Natural light

Parking

Receptionist/Secretarial services

TV/Monitor

Utilities included
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3536 Concours Street

3536 Concours Street, Ontario, CA
Property

Office

80,160 SF
Availability

2 Spaces

4,685 SF
For Lease

$2.45/SF/YR
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Sixth Street Center

1131 W. 6th St., Ontario, CA
Property

Office

62,797 SF
Availability

1 Space

36,403 SF
Year Built

1978
For Lease

$1.90/SF/MO
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Frequently Asked Questions

Asking prices vary based on the property location, rating, amenities such as proximity to restaurants, cafes, and entertainment venues, as well as convenience of access to public transport, airports, and thoroughfares.

The average rent for office space in Ontario is $29.34 per square foot. The minimum rental rate for office space in Ontario is $22.8 per square foot. Among listings of office space currently available for lease in Ontario, the maximum rental rate is $33 per square foot.

For more details on Ontario office space rent and sales prices, as well as overall market quality and new construction data, see Ontario Office Market Trends.

Most experts recommend an average of between 75 and 150 square feet of office space per person. However, it is important to keep in mind that how much office space you ultimately need depends on your activity and how you need to use the space, as much as it does on how many people it should accommodate. If you already know what size office would best suit your needs, use the available space size filter at the top of the search page to focus your search on the best fit for you.

You’ll find a home for almost any size of business in Ontario, as the local office market offers a wide range of options. Office spaces currently on the market go up to as much as 289,940 square feet in size for an individual listing.
However, there is a variety of differently sized opportunities below that maximum. For your consideration, the median size of an office space for lease in Ontario is 2,421 square feet, and the average office space size here is 9,352 square feet.

You can find 64 office listing(s) for lease in Ontario, which add up to a total of 562,782 square feet. Availability on the market includes a variety of office use types, such as General Office, Office Building, Shared Space, Strip Retail, Warehouse/Distribution.

The most common office use type currently available for lease in Ontario is General Office, which is offered in 36 or 56.25% of listings. The second-most frequent office use type listed here is Office Building, which account for 5 or 7.81% of office space currently available. On the other end of the spectrum, the office use type least common among local listings is Flex - Office, which is available in 1 listing(s).

You can search 2 office sublease listing(s) in Ontario, which amount to a total of 3,776 square feet. Sublease opportunities on the market include General Office, Office Building, Shared Space.

The best choice of neighborhood for your office space will greatly depend on the elements that are most relevant to your business and your employees. However, a good criterion to start with is to look at the areas of the city that have the highest concentration of office properties, as these areas are generally well connected to transit options and have a good degree of amenity availability.

Each individual’s commuting experience will of course be different depending on a number of factors. Check the location description details for the office listings that catch your eye, to get an overview of walkability, access to public transport, the quality of infrastructure dedicated to biking commuters, as well as the proximity to parking facilities, fuel stations, and other essential amenities.

The Ontario office market incorporates a mix of properties of various ages, ratings, construction grades, and other quality indicators. Roughly 62.5% of total office space listings in the city are in properties rated Class A. Class B office space accounts for 31.25% of spaces listed on the leasing market. Class C office space makes up 4.69% of office space available in Ontario.

Buildings completed in and since the year 2000 account for 37.5% of office properties in the city and incorporate a total of 871,295 square feet. About 12.5% of office space in Ontario is in buildings that have been renovated at least once since 2000.

Out of the office space listings currently available in Ontario, you can find 2 LEED-certified or LEED-proposed option(s). Across the city, about 8% of office space is green, which amounts to 4,573,037 square feet. A total of 1 building(s) here earned a LEED-certification — certification level Silver (1).

There are, of course, a lot of things to factor in when you are looking for office space. Aspects including the accessibility of the location, the quality of the facility, the size of the space, the convenience of nearby amenities, the type and duration of the lease, and of course the cost are all part of the search and decision process. For a quick checklist of what you should take into account when researching the market, consider these seven tips for choosing the best office location for your business. Alternatively, for a comprehensive take on everything to consider when looking for office space, see our in-depth guide to finding office space for small or growing companies. The guide also includes insights from seasoned professionals and can serve as a helpful resource for growing companies, no matter their current size.

Are you looking to lease office space in the vicinity of your current location or in a particular neighborhood of Ontario? Using the interactive map, you can easily navigate to your preferred location and customize your search area around a specific point of interest. Select “Radius” from the Search Mode options menu, click on the map to set your search reference point, and expand the radius to select your desired search area. Browse available listings to find the best office space that meets your location, as well as other business needs.

Ontario, CA Office Inventory Breakdown

There are a number of factors that make a city attractive for businesses to relocate or expand, as well as for investors to enhance their portfolios through local acquisitions. Among the most important factors to consider are the size and quality of the local office market, which is an essential component of the local economy.

Total Office Space in Ontario: 4,540,407 Sq. Ft.

In 2024 the Ontario office market encompassed 4,540,407 square feet of space.
Class A office space makes up a 54.81% share of Ontario office inventory, while Class B office assets represent roughly 45.19% of the market total.

Ontario Office Market Breakdown by Building Size
Building Size Range	Total Square Feet	Share of Total Office
50k to 100k Sq. Ft.	2,013,071 Sq. Ft.	44.34%
100k to 500k Sq. Ft.	2,048,656 Sq. Ft.	45.12%

Ontario Office Market Breakdown by Building Quality Rating
Class	Total Square Feet	Share of Total Office
Class A	2,488,541 Sq. Ft.	54.81%
Class B	2,051,866 Sq. Ft.	45.19%

Data was provided by CommercialEdge, refers to properties larger than 50,000 square feet.

Ontario, CA Green Office Space

One of the most important aspects of quality regarding modern office space is the use of sustainable building practices. Green certification is one of the most employed methods used to quantify that in any real estate market.
Roughly 8% of the total Ontario office inventory - adding up to 4,573,037 square feet - is classified as green office space.

Ontario Office Market Breakdown by Green Certification
Total Square Feet	Total Green Square Feet	Green Share of Total
4,573,037 Sq. Ft.	356,568 Sq. Ft.	8%

8% Green

Green Office Inventory

Data was provided by CommercialEdge and refers to properties larger than 25,000 square feet.

Ontario, CA Office Market Overview

Like the rest of the Greater Los Angeles area, Ontario features a robust economy and plenty of things to do. For most of the city’s existence, Ontario’s economy has relied on transportation and production. However, the California tech boom can be felt here, too, and the city is especially welcoming toward startups that want to innovate.

Ontario is situated near the halfway point between Los Angeles and San Bernardino, offering great logistical opportunities for local companies. And, when it comes to leisure time, the city offers an eclectic mix of restaurants, cafes and galleries, as well as wilderness trails on the nearby Mount San Antonio — known to Ontario residents as “Mount Baldy.”

Ontario, CA Office Spaces for Rent

Frequently Asked Questions

How much does office space cost in Ontario, CA?

How much office space do I need?

What types of office space can I lease in Ontario, CA?

Can I find sublease office space in Ontario, CA?

Where is the best location for office space in Ontario, CA?

How long is the average commute to work in Ontario, CA?

Where can I find the highest quality office space in Ontario, CA?

How do I find the best office space in Ontario, CA?

How can I find office space for rent near me?

Ontario, CA Office Inventory Breakdown

Total Office Space in Ontario: 4,540,407 Sq. Ft.

Ontario, CA Green Office Space

Ontario, CA Office Market Overview

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