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Building permitEngineered drawings

Home addition, from the zoning to the finishing

We check the zoning, have the drawings made, pour the foundation and tie the new space into your house.

Free estimateTurnkey renovation
Residential addition under construction

Additions in the West Island and Laval

What an addition includes

Checks and permit

  • We read the required setbacks and the allowed height
  • We survey the foundation, the structure and the services
  • The engineer's sealed drawings go with the application

Digging and foundation

  • We locate the underground services before digging
  • We pour the footings below the frost line
  • We lay the drain and damp-proof the foundation

Framing, walls and roof

  • We raise the framing to the engineer's drawings
  • We install a beam wherever the wall is opened
  • Roof, windows and siding matched to your house

Connections and finishing

  • We extend the heating, the ventilation and the circuits
  • We have it inspected before the walls close
  • We hang the drywall, paint and level the floors

The stages of an addition

  1. Checking the lot

    We read the zoning and the location certificate to see what is allowed.

  2. Drawings and engineer

    An engineer calculates the loads and seals the construction drawings.

  3. Permit and contract

    We file with the city and sign the schedule with you.

  4. Foundation and structure

    We dig, pour the foundation, raise the framing and the roof.

  5. Connections and finishing

    We extend the services, have it inspected, then finish the walls.

The kinds of addition that are possible

Your city's zoning and the size of the lot decide what is possible.

  • Extension at the back · the most common one, if the yard leaves enough room.
  • Extension on the side · possible depending on the distance to your neighbour.
  • Adding a storey · possible if the foundation can carry the added weight.
  • Primary suite or garage · a room attached to the house and heated with it.
See the kitchenDiscuss your project
Addition under construction tied into an existing house

Questions about home additions

The zoning by-law sets the setbacks you must respect, how much of the lot you may cover and the permitted height. We read those against your location certificate.

Always. Adding floor area changes the footprint of the building, so a building permit is required, with the structural drawings, the sections and the elevations.

In nearly every case. Footings, framing and any replacement beam call for a sealed load calculation.

Count in months. The paperwork, meaning the checks, the drawings and the city's review, often takes as long as the foundation itself.

We do not build new houses. Our RBQ licence covers renovation and additions to an existing building, not new construction.

Have your addition project checked

We start by reading the zoning and the foundation to see what is allowed at your address.

Free estimateTurnkey renovation

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What our clients say

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  • « Excellent contracteur. Ils ont fait mes planchers et autres projets et nous sommes très satisfaites. Je recommande 100%. »
    Mélina Desbiens
  • « L'expérience client au cœur des services de Dilamco Construction ! »
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