Longueuil Stormwater Connection Bylaw for New Builds

Environmental Protection Quebec 3 Minutes Read · published May 24, 2026 Flag of Quebec

In Longueuil, Quebec, connecting a new building to the municipal stormwater system requires compliance with city bylaws, engineering standards and permit processes administered by local planning and public works departments. This guide summarizes the typical technical requirements, approval steps, inspection and enforcement pathways so builders, designers and homeowners can plan connections that meet Longueuil standards and avoid delays or fines. For exact technical specifications and submission addresses consult the municipal guidance and bylaws cited below.[1][2]

What the rules cover

Stormwater connection rules in Longueuil cover the location and diameter of connection points, allowable discharge locations, private on-site retention or detention measures, separation from sanitary sewers, and post-construction erosion control. Site grading, curb-cut permits and road-opening permits may also be required before work begins.

  • Design and construction to municipal engineering standards.
  • Required permits and connection authorizations from the city.
  • Inspection and certification before acceptance of the connection.
Begin permit applications early to allow time for engineering reviews and site inspections.

Permits, approvals and typical process

New builds typically require a stormwater connection authorization from Longueuil's planning or public works office plus any applicable excavation or municipal right-of-way permits. Submit complete engineering drawings, drainage calculations and a site plan with the building permit application; the city reviews the stormwater connection as part of permitting and may require modifications or on-site retention.

  • Apply with engineering drawings and drainage report to the city's permitting division.[1]
  • Allow time for plan review and conditional approvals before starting work.
  • Arrange site inspections at specified milestones, such as before backfill.

Penalties & Enforcement

Enforcement of stormwater connection requirements is carried out by the city's bylaw enforcement and public works/engineering departments. Specific monetary fines, daily penalties or escalation rules are not specified on the cited municipal pages and should be confirmed with the city before construction.[2]

  • Fine amounts: not specified on the cited page.
  • Escalation for repeat or continuing offences: not specified on the cited page.
  • Non-monetary orders: the city may order remediation, disconnection, or stop-work until compliance is achieved.
  • Enforcer: By-law Enforcement and Service de l'aménagement du territoire / Public Works; complaint and contact pathways are available on municipal pages.[2]
  • Appeals and review: appeal routes and time limits are not specified on the cited pages; confirm time limits with the city so appeals are filed on time.
If you receive an order, act quickly to arrange remediation and avoid escalation.

Applications & Forms

The city typically requires engineering drawings, a drainage report and the standard building permit application. Specific form names, numbers, fees and submission portals are not specified on the cited municipal pages and should be confirmed with the permitting office.[1]

Common violations

  • Connecting to the wrong sewer or unauthorized discharge to a storm sewer.
  • Failure to obtain a connection authorization before construction.
  • Improper on-site drainage that causes runoff onto public property or neighbours.

How-To

  1. Confirm municipal requirements and locate the nearest authorized storm connection point using city engineering guidance.[1]
  2. Prepare engineering drawings and a drainage report showing proposed connections and on-site controls.
  3. Submit the building permit and stormwater connection materials to the city's permitting division and pay applicable fees.
  4. Arrange inspections at required stages; correct any deficiencies the inspector identifies before final acceptance.
Inspections commonly occur before backfilling to verify pipe slopes and connections.

FAQ

Do I need a separate permit to connect stormwater for a new build?
Yes; the stormwater connection is reviewed as part of permitting and may require a separate connection authorization from the city. Check the municipal guidance for submission requirements.[1]
Who inspects the storm connection?
Inspections are performed by municipal engineering or public works inspectors; contact the city's permitting or public works office to schedule inspections.[2]
What if storm runoff must be detained on site?
The city may require retention or detention facilities sized by drainage calculations; technical standards are provided in municipal engineering specifications or by referral to provincial stormwater guidance.[3]

Key Takeaways

  • Confirm connection point and municipal requirements before design.
  • Submit full engineering drawings and drainage reports with permits.
  • Contact the city's permitting or public works office early to avoid delays.

Help and Support / Resources

  1. [1] City of Longueuil - Stormwater connection guidance
  2. [2] City of Longueuil - Municipal bylaws and enforcement information
  3. [3] Government of Quebec - Stormwater management guidance

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