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Ontario, CA

Office Units

Ontario, CA Office Units for Lease

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Rancho Cucamonga, CA Upland, CA Fontana, CA Eastvale, CA Jurupa Valley, CA Montclair, CA Chino, CA Claremont, CA

119 properties

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Class A Office Suite

Updated: Jun 1

Class A Office Suite

3401 Centre Lake Drive, Ontario, CA 91761

$4,318/Mo

Suite 248 includes 3 offices, 1 conference room, storage, and an open area
6‑story Class A office building completed in 1990
Prominent visibility from I‑10 with immediate access at Haven Avenue
Parking ratio of 4/1,000; covered and reserved parking available
Card key security system and professional property management

Class A Office Unit

Updated: Jun 1

Class A Office Unit

3401 Centre Lake Drive, Ontario, CA 91761

$6,430/Mo

Suite 236 includes 2 small offices and 2 large open‑plan training areas
6‑story, Class A office building constructed in 1990
Immediate access to I‑10 at Haven Avenue
4/1,000 parking ratio; covered and reserved parking available
Card key security system and professional property management

Office Unit with Open Workspace

Office Unit with Open Workspace

3401 Centre Lake Drive, Ontario, CA 91761

$5,788/Mo

Suite 242 includes private offices, storage, a breakroom, and a card-key security system.

Office Unit with Reception Area

Office Unit with Reception Area

430 N Vineyard Ave Unit 125, Ontario, CA 91764

$7,305/Mo

2,563 sqft 3.81 AC lot

Suite 125 offers a professional office layout with private offices, conference space, and a breakroom under a Full Service Gross lease.

Class A Office Suite

Class A Office Suite

3401 Centre Lake Drive, Ontario, CA 91761

$4,366/Mo

Suite 230 combines four private offices, storage, and an open work area within a professionally managed building.

Flexible Office Suites

Flexible Office Suites

3257 E Guasti Road, Ontario, CA 91761

$8,242/Mo

Office suites offer adaptable layouts, central HVAC, key card entry, and full-service gross lease terms.

Office Units with Lake Views

Office Units with Lake Views

3237 E Guasti Road, Ontario, CA 91761

$5,489/Mo

Available suites offer divisible layouts with private offices and open work areas.

Furnished Office Suite with Views

Furnished Office Suite with Views

3401 Centre Lake Dr Unit 480, Ontario, CA 91761

$8,368/Mo

2,936 sqft

Move-in-ready workspace includes private offices, a conference room, storage, and an open work area.

Class A Office Units Near I-10

Class A Office Units Near I-10

3450 Center Lake Drive, Ontario, CA 91761

$7,510/Mo

Two-story office suites provide flexible configurations, covered parking, card-key security, and full-service gross lease terms.

Class A Office Suites

Class A Office Suites

3450 Center Lake Drive, Ontario, CA 91761

$9,596/Mo

Two-story office property with controlled access, flexible suite configurations, and full service gross lease terms.

Class A Office Unit

Class A Office Unit

3450 Center Lake Dr Unit 100, Ontario, CA 91761

$7,510/Mo

2,834 sqft

Office suite with private offices, conference space, open work area, and IT storage.

Professional Office Unit with Conference Room

Professional Office Unit with Conference Room

3281 E Guasti Road, Ontario, CA 91761

$8,528/Mo

First-floor office suite with private offices, open work areas, a breakroom, and lobby-level access.

Office Suite with Airport Views

Office Suite with Airport Views

3281 E Guasti Road, Ontario, CA 91761

$5,281/Mo

Move-in-ready suite with a conference room, private office, file room, and open workstation area.

Class A Office Unit

Class A Office Unit

3257 E Guasti Rd Unit 210, Ontario, CA 91761

$8,242/Mo

3,110 sqft

Five offices, a breakroom, and storage support a ready-to-occupy suite configuration.

Office Unit with Five Offices

Office Unit with Five Offices

430 N Vineyard Avenue, Ontario, CA 91764

$7,305/Mo

Suite 125 provides a reception area, conference room, breakroom, card key security, and full-service gross leasing.

First-Floor Office Units

First-Floor Office Units

3998 Inland Empire Boulevard, Ontario, CA 91764

$7,950/Mo

Professional workspace with reception, private offices, conference rooms, kitchen facilities, storage, parking, and freeway access.

First-Floor Office Suite

First-Floor Office Suite

3281 E Guasti Rd Unit 175, Ontario, CA 91761

$8,528/Mo

3,218 sqft

Professional workspace with private offices, collaborative areas, and direct access from the building’s main lobby.

Office Unit with Reception Area

Office Unit with Reception Area

430 N Vineyard Avenue, Ontario, CA 91764

$3,811/Mo

Office suite with private offices, IT storage, shared conferencing, and round-the-clock building access.

Office Unit with Open Plan

Office Unit with Open Plan

3450 Center Lake Dr Unit 125, Ontario, CA 91761

$9,596/Mo

3,621 sqft

Two-story Class A office property with secure access, professional management, and flexible suite configuration near major freeways.

Office Suite with Open Plan

Office Suite with Open Plan

3281 E Guasti Road, Ontario, CA 91761

$2,404/Mo

Full-service lease with vehicle parking, a breakroom, and professional building management.

Class A Office Suite

Class A Office Suite

4141 Inland Empire Boulevard Unit 220, Ontario, CA 91764

$6,808/Mo

2,569 sqft

Suite 220 combines reception, offices, conference space, and a breakroom within a professionally managed building.

Office Suite with Conference Room

Office Suite with Conference Room

4141 Inland Empire Boulevard, Ontario, CA 91764

$6,808/Mo

Class A space offers a reception area, private offices, meeting space, and a breakroom in a professionally managed building.

Class A Office Suite

Class A Office Suite

3401 Centre Lake Dr Unit 248, Ontario, CA 91761

$4,318/Mo

1,515 sqft

Professionally managed office space with private offices, conference facilities, storage, and open work area.

Class A Office Building

Class A Office Building

4141 Inland Empire Boulevard, Ontario, CA 91764

$4,343/Mo

Three-story office property with direct I-10 access, freeway exposure, and full-service gross lease structure.

Ontario, CA Office Units Lease Rates & Market Statistics

Browse 119 Office Units for lease in Ontario, CA on Realmo, a commercial real estate marketplace serving the Ontario area. The current inventory totals 1,213,693 square feet of properties — an average of ~10,200 SF per listing.

Office Units lease rates in Ontario range from $27 SF/Yr at the entry level to $93.20 SF/Yr at the top of the market, averaging $34.33 SF/Yr. That's a 3x spread between entry-level and premium space, making side-by-side comparison of asking rents and lease terms essential. At $34.33 SF/Yr, the local average runs 42% above California's state average of $24.11 SF/Yr.

Ontario accounts for 29% of the 412 office units currently available across San Bernardino County, where nearby markets include Rancho Cucamonga and Victorville. Office Units make up 89% of the 134 Office Spaces currently for lease in Ontario, with asking rates in line with the citywide Office Spaces average. Also worth a look for tenants weighing alternatives: Office buildings (13 listings) and Coworking space (5 listings) elsewhere in the Ontario market.

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