Developmental Services Ontario Eastern Region (DSOER)

Here is where you can find a Developmental Services Ontario Eastern Region (DSOER) office in your community.

Letter of Compliance 2018-2019
The Ministry of Community and Social Services is pleased to inform you that the DSO, Eastern Region was found to be IN COMPLIANCE with Ontario Regulation 299/10 of SIPDDA (Quality Assurance Measures) and/or policy directives applicable to MCSS-funded services and supports for adults with developmental disabilities.
Click here to read the letter

If you or someone in your family has a developmental disability, now it is easier to find out about the support you need.

Starting July 1, 2011, there is a single point of access for all adult developmental services funded by the Ministry of Community and Social Services. This is Developmental Services Ontario (DSO) or DSOER if you live in the Eastern Region.

This means:

  • only one place to apply
  • the same set of rules and tools for everyone (eligibility and evaluation)

Why have a single point of access? How is this easier?

The plan is to make it a better system that is fair for adults with developmental disabilities and their families to get the right support they need – now and later.

Today, DSOER can:

  • let you know what services and support are available to you in your community;
  • find out about the services you need and what you can have;
  • match the right resource to your needs.

In the future, individuals receiving ministry funds can get help from DSOER to manage this money.

Application and Referral Form

Applying for Ontario Disability Support Program (ODSP)

If you get a letter from a Developmental Services Ontario (DSO) office saying that you are eligible for adult developmental services and supports, this means that you may also be eligible for ODSP.

Be sure to keep the letter. It is an important part of your ODSP application.

More information here

For more information about Developmental Services Ontario Eastern Region (DSOER)

Please contact:

Toll free at: 1-855-376-3737

Fax: 1-855-858-3737

TTY: 1-855-777-5787



In an emergency where you don’t feel safe, please call 911.

We are open from 8:30 a.m. to 4:30 p.m. Monday to Friday.

You can visit the DSOER offices at these locations:

Ottawa Region


200-150 Montreal Rd Ottawa, ON K1L 8H2

(Tuesdays and Thursdays from 8:30 to 3:30)

United Counties of Prescott-Russell

Please note that the drop-in service for United Counties of Stormont, Dundas & Glengarry (SD&G) is not available between February 12th, 2018, and March 10th, 2018. You are invited to call 1-855-376-3737 to book an appointment.


657, rue Principale

Casselman, ON   K0A 1M0

(Tuesdays from 8:30 to 3:30)

Renfrew County


303-77, Mary Street Pembroke, ON K8A 5V4

(Mondays from 8:30 to 3:30)

Stormont, Dundas and Glengarry


280 Ninth Street W Cornwall, ON K6J 3A6

(Wednesday from 8:30 to 3:30)

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