ADU Plans in Caledon - Design, Permits, Construction

Most of Caledon sits inside the Greenbelt or on the Niagara Escarpment, and almost every rural property runs on private well and septic. An accessory dwelling unit here starts with a septic loading calculation - the existing bed often cannot legally take another bedroom, and a new tile field, not the building, becomes the largest single line in the budget. Caledon permits additional residential units, but most rural properties require a septic capacity assessment and, on the escarpment, Niagara Escarpment Commission approval.

Rural acreages on private well and septic; Greenbelt and escarpment overlays cover a majority of the town's land area. North-GTA snowfall of 152 cm and -5.4°C winters give Caledon a May-October working season - foundations for adu plans go in before the ground closes, with interior finishing carried through the cold months.

Plans are only useful if they are permit-ready for the authority that will actually review them, so an Caledon set is drawn to Peel Region submission standards rather than to a generic template. The set covers site plan, floor plans, elevations, sections, the 1.2 m foundation detail, the roof framing sized for 152 cm of snow, and the fire-separation and egress details the plans examiner checks first. Stock plans bought online almost always fail the Caledon review on setbacks and lot coverage, because those are parcel-specific and no catalogue drawing can know your lot.