Home Additions in Mississauga

The City of Mississauga Planning and Building Department handles the zoning check, the permit and the inspections; Peel Region looks after regional roads and servicing. Mississauga’s Lot Grading and Municipal Services Protection By-law governs grade changes, and residential grading plans are reviewed before the building permit is issued. When an addition moves the grades, its grading plan is one of the first drawings we finish.

If the lot is inside the regulated area of Credit Valley Conservation (CVC), yes, and the CVC permit comes before the Mississauga building permit. Building an addition there counts as development under Ontario Regulation 41/24, so we check CVC’s mapping against your survey. Eastern Mississauga along Etobicoke Creek is under the Toronto and Region Conservation Authority. On those lots we make the same check with the authority that covers them.

Yes, if it fits the zoning, and that is the first thing we check. Mississauga’s zoning by-law is Mississauga Zoning By-law 0225-2007, dated June 20, 2007 and amended many times since. It is one by-law, but with that many amendments we read the current consolidation for your zone. A design that misses a setback or the coverage limit needs a minor variance from the Committee of Adjustment first.

Each district sets its own requirements, so the first question is whether your house is in one of them. Mississauga has three Heritage Conservation Districts designated under Part V of the Ontario Heritage Act: Meadowvale Village, Old Port Credit Village and Streetsville. For a house inside one, we ask Mississauga what that district requires of an addition and design to it.

Yes. We take on home additions across Mississauga, including Port Credit and Streetsville, within an hour of our Richmond Hill office. The first consultation is free, by phone or on site.

Three things to start: property address and a survey, if you have one; what you want to add and where; and photos of the side of the house and the yard where it would go. Send those and we tell you what the City of Mississauga Planning and Building Department will ask for before we quote.

Yes. Digging a new foundation near a tree can injure its roots, and Mississauga’s Private Tree Protection By-law 0021-2022 needs a permit for that once the trunk measures 15 cm, even when the tree is dead or stands just over the line on a neighbour’s lot. That permit is a separate application from the one the Planning and Building Department issues, so we put every tree that size on the survey before the addition’s footprint is fixed.

Yes, where the house type allows. A unit in a new addition counts as a unit inside the house: Mississauga allows two of those in a detached, semi-detached or town home, or one if the lot already has a garden suite. A standard condominium townhouse is outside the rule, so we confirm the house type and what the lot already holds before the layout goes to the Planning and Building Department.

Our P.Eng answers that before the design is set. For a suburban house of the 1960s to 1990s, we start from the original permit drawings if you can get them, since they record the footings and wall construction; for an older house in the Port Credit or Streetsville village cores, we inspect the foundation itself. Where it falls short, the reinforcement or new footings are drawn into the set for the Planning and Building Department.

We set up the application in ePlans and upload the architectural, structural and mechanical drawings as one set. The application’s status shows in ePlans under Project info. When the Planning and Building Department’s examiner asks for changes, we revise the set and send it back, and you hear from us once the permit is issued.