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Building permits in Lachute: the steps to follow

Atelier FlorA is based in Lachute, at 599 rue Principale. Here is how a building permit application works here, from the first check to filing. The exact rules come from the City's urban planning department: always confirm them with it.

3D rendering of a residential development seen from the entrance

5 min read · Updated on October 10, 2026

Before drawing: what we check in Lachute

The urban planning bylaw changes from one sector to another. Before the first line is drawn, we check what your lot allows.

  • Urban perimeter: In serviced areas, setbacks and the land coverage ratio guide where a home addition or a garage can sit.
  • Older buildings: Century-old homes call for a careful survey: Catherine specializes in restoring this type of building.
  • Agricultural edges: On the outskirts of the territory, the protected agricultural zone limits uses and construction.

The four steps

Here is how a project with us unfolds, from the first conversation to filing.

  1. First conversation: Your project, your lot, your budget. We check what your municipality's regulations allow and send you a service offer.
  2. Preliminary plans: A first version, two rounds of revisions, and the choice between conventional or eco-responsible options.
  3. Building permit plans: The complete plans required by the city: site plan, floor plans, elevations, sections and details, signed by a T.P. when needed.
  4. Filing and follow-up: We support you with the filing of the application and adjust the plans if the municipality asks for it.

Documents to gather

To get started, we need:

  • The certificate of location or the land survey plan
  • The existing plans of the house, if you have them
  • Photos of the lot and the building
  • Your sketches, inspiration images and your budget

Who files the application?

You do, as the owner. We support you: we prepare the plans that are required and answer the municipality's questions. If the City asks for changes, we adjust the plans.

Confirming with the City

Fees, timelines and exact documents vary with the project and the sector. The urban planning department of the City of Lachute is the only official source. We help you ask it the right questions.

Frequently asked questions

Who files the permit application in Lachute?

You do, as the owner, but we support you: we prepare the plans that are required and answer the municipality's questions.

Do I need an architect for my house?

Not for most houses. A detached single-family house of no more than two storeys, with no more than one basement and under 600 m², can be designed without an architect. Up to three storeys and under 600 m², the plans are signed by a professional technologist. For larger projects, we work with a partner architect.

Next step

Tell us about your project

Describe your idea in a few lines, even if it is not clear yet. We reply with the next steps and an estimate.

How it works

  1. You describe your project

    A few lines, a sketch or some photos are enough to get started.

  2. We reply

    The next steps and an estimate, before any commitment.

  3. You decide

    The offer is valid for 60 days. Payment is made in two 50% instalments.