Office Space for Rent Ontario

Regus Ontario - Guasti Rd

3200 Guasti Road Suite 100

1 Space, 1 - 8 ^ppl

(3,000^SF)

From $485/MO

This exquisitely furnished and extensive class A corporate building is impressively situated within a professional campus environment with beautifully landscaped walkways, courtyards and a relaxing water feature all present on-site. Within this stunning and exceptionally prestigious working environment there are three spacious and fully functional meeting rooms that can accommodate groups from as small as four people to as many as 30, each with high speed internet and telephone services. The center maintains a dedicated furnished “Day Office”, and can be reserved by the hour, day or week to offer significant flexibility.

Empire Towers I

3633 Inland Empire Blvd

1 Space, 1 - 36 ^ppl

(4,472^SF)

Premier Ontario Airport submarket location with immediate I-10 access and high visibility along the Inland Empire corridor.

Spaces Ontario - CoRise Spaces

4684, Ontario Mills Parkway Ste 200

1 Space, 12 ^ppl

From $149/MO

CoRise Spaces is a modern, beautifully designed coworking and private office community built exclusively for mental health and allied wellness professionals. Created by therapists and psychologists, our space features fully equipped therapy rooms with soundproofing, private telehealth pods, focused coworking desks, a welcoming provider lounge, and conference rooms available by the hour. Members enjoy a flexible credit-based membership system — no long-term leases, no wasted space. With on-site receptionist services Monday through Saturday (8am–5pm), after-hours provider access until 10pm, complimentary Wi-Fi, coffee, light snacks, and a professional community of like-minded clinicians, CoRise is the professional home mental health providers deserve. Whether you're seeing clients in-person or working on notes between sessions, our space is thoughtfully designed to support your practice at every stage.

Office Evolution

3350 Shelby St. Suite 200

1 Space, 1 - 4 ^ppl

From $800/MO

Office Evolution Ontario is a flexible coworking solution located just east of downtown Los Angeles and close to the Ontario International Airport. We offer private offices, coworking, conference rooms, business addresses, and other virtual services. Our flexible options allow us to create a solution that works just for you. Contact us today to learn more about our options!

Regus Ontario - North San Antonio Ave

204 North San Antonio Avenue 1st and 2nd floor

5 Spaces, 7 ^ppl

Coworking from $69/MO

This office building on North San Antonio Avenue combines professional functionality with a welcoming, polished appearance. The property features a garden driveway entrance and a distinctive, red-tiled rooftop. Interiors include furnished meeting rooms equipped with widescreen TVs, whiteboards, and modern video conferencing technology. Flexible workspace options include private offices, open coworking areas, and individual desk spaces. Business-grade Wi-Fi, on-site support, and a friendly reception area ensure smooth daily operations. Relaxed breakout areas and kitchen facilities provide spaces for informal meetings or breaks, while proximity to downtown offers additional dining and networking opportunities.

Regus Ontario - Concours St

3990 Concours Street 1st Floor

5 Spaces, 6 ^ppl

Coworking from $129/MO

Located on Concours Street in Ontario, California, this flexible coworking space offers a dynamic environment designed for modern professionals. With a prime location near major highways and the Ontario International Airport, this space provides easy access to transportation and nearby amenities. Fully equipped with high-speed internet, private offices, collaborative workspaces, and meeting rooms, it caters to entrepreneurs, freelancers, and small businesses seeking a productive, cost-effective solution. Flexible membership options, 24/7 access, and a vibrant community make this coworking space ideal for companies looking to thrive in an innovative and supportive atmosphere.

Regus Ontario - E. Guasti Rd

3281 E Guasti Road 7th Floor

3 Spaces, 1 - 7 ^ppl

Coworking from $499/MO

This prestigious eight-storey tower features great views over a 40 ft high fountain and lake from its seventh-floor location. The building boasts grand formal granite lobbies, wide windows and covered parking. It is situated in the heart of the Ontario, California innovation hub within Los Angeles and the counties of Orange, San Bernardino and Riverside. Skills and talent are plentiful in an area that’s home to many higher education establishments. A diverse range of companies have made this fast-growing region their home, including packaging, health insurance law enforcement products and utilities firms in the immediate vicinity.