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Professional Engineers Ontario mailing address

To mail a letter to the Professional Engineers Ontario — the body that regulates professional engineers in Ontario — send it to Professional Engineers Ontario, Suite 101, 40 Sheppard Avenue West, Toronto, ON M2N 6K9. Professional Engineers Ontario is the licensing and regulating body for professional engineering in Ontario. It grants the P.Eng. licence, sets standards of practice, and investigates complaints and allegations of unlicensed practice to protect the public. Use this address for complaints and concerns, registration and renewal paperwork, and requests for a certificate of standing. Add your return address and any registration number if you'd like a reply, and confirm the address on PEO's official contact page before anything time-sensitive.

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Mailing address

Verified September 2026

Professional Engineers Ontario — correspondence address

Professional Engineers Ontario
Suite 101
40 Sheppard Avenue West
Toronto ON  M2N 6K9

Complaints and concerns, registration and renewal paperwork, requests for a certificate of standing, and general written correspondence. This is the regulator's main office — not a courier depot or a member's practice.

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Sources

Addresses verified September 2026 against official sources. Always confirm on the official site before time-sensitive filings.

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Key facts

  • This is the Professional Engineers Ontario's published correspondence address, taken from its own contact page.
  • Professional Engineers Ontario (PEO) is the statutory regulator for professional engineers in Ontario — not a voluntary membership association or union.
  • Use it for complaints, registration and renewals, and certificate-of-standing requests — not for parcels or courier-only deliveries.
  • Add an attention line (e.g. "Registration" or "Complaints/Investigations") so your letter reaches the right department.
  • Include your full name, registration number if you have one, and a return address so they can respond.
  • PostPal prints your letter and mails it for you — no printer, envelope, stamps, or post office trip.

How to send your letter

  1. 1

    Decide what your letter is for

    PEO handles registration and renewals, complaints and concerns about a registrant, and requests such as a certificate of standing. Note which one applies and add an attention line (e.g. "Attention: Registration" or "Attention: Complaints/Investigations") so it reaches the right department.

  2. 2

    Include the details they need

    Give your full name and, if you're a registrant, your registration or membership number. If your letter is about someone else — a complaint, or a reference request — include that person's name and, where you have it, their registration number so the file can be found.

  3. 3

    Address it to the office

    First line: Professional Engineers Ontario. Next: Suite 101. Then the street: 40 Sheppard Avenue West. Then the city line: Toronto ON M2N 6K9.

  4. 4

    Send it with PostPal

    Write or upload your letter to PostPal with the address above prefilled. We print it, add your return address, and mail it for you — no printer, envelope, stamps, or trip to the post office.

Common questions

What does the Professional Engineers Ontario do?

Professional Engineers Ontario is the licensing and regulating body for professional engineering in Ontario. It grants the P.Eng. licence, sets standards of practice, and investigates complaints and allegations of unlicensed practice to protect the public. The address above is its main correspondence office — the right place for registration paperwork, complaints, and requests for a certificate of standing.

What is the Professional Engineers Ontario mailing address?

Professional Engineers Ontario, Suite 101, 40 Sheppard Avenue West, Toronto, ON M2N 6K9. It's the regulator's published correspondence address. Confirm it on PEO's official contact page before anything time-sensitive, since regulators occasionally relocate.

Can I file a complaint about professional engineers by mail?

Most regulators accept written complaints by post as well as online. Send your concern to the address above, marked "Attention: Complaints" (some use "Professional Conduct" or "Investigations"), with the registrant's name and, if you have it, their registration number, plus a clear account of what happened. Check PEO's official contact page for any complaint form they want you to use.

Where do I send registration, renewal, or a certificate-of-standing request?

The same office handles registration and renewals and issues certificates of standing (also called a certificate of professional conduct or good standing, often needed to register in another jurisdiction). Mail it to the address above with an attention line for "Registration," and include your registration number and return address so they can reply.

Is this the regulator, not a professional association or union?

Yes — Professional Engineers Ontario (PEO) is the statutory regulator that licenses professional engineers in Ontario and protects the public. It's separate from any voluntary membership association or union for the same profession; use this address for regulatory matters like registration, complaints, and standing.

How do I mail the Professional Engineers Ontario a letter without a printer?

Write or upload your letter to PostPal with the address prefilled. We print it, add your return address, and mail it for you — no printer, stamps, or post office trip needed.

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