Oshawa's Premier
Shared Office Community
and Business Centre

From shared office space to private offices to meeting rooms, large and small, CORE21 provides all the business amenities you need plus an intangible - a collaborative, friendly atmosphere from a growing community of more than 30 businesses and community groups making us their home.

Come in and find out what makes us special.


In accordance to the Ontario Government issued Stay-At-Home order for the province, we are committed to implementing the necessary measures to curb the spread of COVID-19.

Until further notice, our doors will remain locked to the public and walk-in traffic and there will be no Reception coverage.

We are still available for inquiries via email at info@core21.ca.

We appreciate your support and patience during this difficult time.

For the most up to date information regarding COVID-19: Government of Canada: Coronavirus disease (COVID-19): Outbreak update
Province of Ontario:  COVID-19covid 19 (coronavirus) in Ontario

We will continue to monitor the situation and take recommendations from our officials. We thank our #COREmmunity for your ongoing support as we work through this challenging time together. Stay safe and healthy

Versatile Spaces to Rent in the Hub of Downtown Oshawa

Core 21 Facade

Oshawa's premier shared office community and business center

21 Simcoe Street South in the heart of downtown Oshawa is home to Core21. This beautiful two-storey, fully renovated building was specifically designed to provide a shared business facility in a friendly community setting. Book a tour today and find out how we can satisfy all of your needs from mail service to private offices to meeting rooms to event rooms, and everything in between!

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Coworking Spaces

We offer a wide variety of cheerful, energizing workspace options that encourage productivity, interaction, and community.

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Private Offices

Need something a little more private and quiet? Then a private office may be a perfect fit for you. We supply the desk and the space, you supply the business genius.

reception area

Business Address & Mail Service

Don't need office space but need a business address? We have you covered there too. We can accept your mail and parcels at our reception.

CORE21 Boardroom

Meeting Rooms

CORE21 offers its clients a variety of meeting rooms, perfect for client meetings, interviews, board and staff meetings, conference calls, as well as brainstorming sessions and workshops.


Dedicated Desk Rental

Dedicated use of a 6' executive high end desk with lockable storage cabinet located in the communal working space area on our main floor.

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Event Room

The Event room at CORE21 is available to rent at an affordable rate to host gatherings of a larger scale such as presentations and seminars, educational classes, networking events and more.

Main Floor

Lounge & Amenities

No matter which space you rent, CORE21 provides excellent amenities. We have the business equipment you need plus lounge areas throughout the space where you can interact and catch up with colleagues, friends, and your guests.  There is also the Servery and more.


CORE21 is located in the heart of downtown Oshawa and is proud to be home to 30 local business and community organizations.

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