Request review of stormwater assessment

If you feel that the hard surface area on your property has been measured incorrectly, you can request a review of the stormwater assessment for your property online.

The review will determine whether your rooftop or impervious area has been mapped accurately using the most recent aerial imagery. The following characteristics of a property do not fall into the assessment scope:

  • Soil types
  • The ratio of hard surface area to total property area
  • Proximity to creeks, rivers or ditches
  • Presence of private stormwater measures such as downspout disconnection or the use of rain barrels

To request a review, you’ll need to look up your assessment on the stormwater estimator, give the street address of your property, and provide your email address.

Check request status  Request assessment review

Requesting a review does not guarantee your stormwater charge will be lowered. The charge may be raised, lowered or unchanged. The current assessment rate for your property will apply.

Other ways to request a review

You can also download the Request for Review Form and send it via email, mail, or fax.

By email

Scan this form and email it to

By mail

Send this form to:

City of Mississauga
Transportation and Works
Environmental Services
300 City Centre Drive
Mississauga, Ontario L5B 3C9

By fax

Fax this form to 905-615-3405, attention: Environmental Services.

What happens next

  • Once we receive your request we’ll review the property using the most recent aerial imagery
  • Site visits are not part of the review process
  • You will receive notifications by email

Personal information

Your personal information is collected under the authority of sections 11(1) and 227(c) of the Municipal Act, 2001 and will be used by City of Mississauga Staff to respond to your service request and/or inquiry.