RMD zone, Caledon: Mixed Density Residential

What the RMD zone permits

• Additional Residential Unit (must comply with Section 6.4)
• Bed and Breakfast Establishment (must comply with Section 4.5 and Section 5.2.2)
• Day Care, Private Home
• Dwelling, Detached
• Dwelling, Multiplex (must comply with Section 6.5)
• Dwelling, Semi Detached
• Dwelling, Townhouse
• Home Occupation (detached or semi-detached dwelling only; max 6 students per lesson for instruction of a craft or skill)

Standards

Other provisions in this section

• Table 6.2 footnote (12): all RMD minimum/maximum standards (lot area, lot frontage, building area, backyard amenity area, yards, building height, landscape area) are taken from the R1 Zone for a detached dwelling, the R2 Zone for a semi-detached dwelling, and the RT Zone for a townhouse dwelling; all accessory buildings and structures follow R1 Zone standards.
• Backyard Amenity Area (minimum) applies via footnote (12) – R1/R2/RT standard by dwelling type.
• Driveway setbacks (minimum): Table 6.2 footnote (14) – must comply with Section 5.2.14 Driveway Provisions for Residential Dwellings.
• Section 5.2.14 driveway width maximum (applies to a driveway accessing any residential use, measured perpendicular to the path of travel along the whole driveway including any continuous hard surface): 6.0 m where lot frontage is 12.0 m or less; 50% of lot frontage where frontage is greater than 12.0 m and less than 18.0 m; 10.0 m where frontage is 18.0 m or more.
• Section 5.2.14 d) circular driveways: permitted only where the front or exterior side lot line containing the entrance is 36 m or wider; max 50% coverage of the yard the driveway is in; max cumulative entrance width 10.0 m at the lot line (notwithstanding Section 4.3.5); widest point beyond the circular portion max 10.0 m; open space between access points must meet the entrance separation of Section 4.3.4.
• Section 5.2.14 e) hammerhead driveways: front yard or exterior side yard only; max 2.0 m projection perpendicular from the driveway; max 3.0 m width parallel to the driveway; may be used for parking; must meet the applicable zone's required driveway setback.
• Table 6.2 footnote (11) (reaches RMD only through the R1/R2/RT standard borrowed under footnote (12); the RMD column itself cites only (12) and (14)): where a common vertical wall separates two dwelling units, no interior side yard is required.
• Table 6.2 footnote (13) (relevant to a townhouse dwelling via footnote (12)): maximum 12 dwelling units per townhouse dwelling in the RT Zone.
• General Provisions in Section 4 and Parking, Loading & Delivery Standards in Section 5 also apply (Section 6.1).
• Section 6.4.1: an additional residential unit is permitted only on the same lot as a detached, linked, semi-detached, or any variation of a townhouse dwelling.
• Additional Residential Units (Section 6.4.5, Table 6.3, R1/R2/RT/RM/RMD column): max 3 ARUs per lot; 1 parking space per ARU (none required for the first ARU on an R1, R2, RT or RMD lot where a transit station or stop is within 400 m; none at all where the by-law requires no parking for the main dwelling unit); max building area 45% or existing zone requirement, whichever is greater; minimum landscaping 50% of the rear yard for a lot containing a detached ARU; minimum width of unobstructed path from street to the ARU entrance 1.2 m, reducible to 1.0 m for the length of an existing building wall that prevents 1.2 m; a covered window well or retaining wall serving a window in that path is not an encroachment.
• Detached Additional Residential Units (Section 6.4.6, Table 6.4, R1/R2/RT/RM/RMD column): max 1 detached ARU containing max 1 dwelling unit; any yard other than the front yard; max floor area no greater than the ground floor area of the building containing the main dwelling and not exceeding 80 m2 gross floor area; max height 4.5 m; rooftop outdoor amenity areas not permitted; min 3 m building separation from the main dwelling; min interior side yard 1.2 m; min rear yard 1.2 m; exterior side yard per existing zone requirement; uncovered steps and eaves may encroach per Table 4.2.
• Section 6.4.7: where a lot has a lawfully existing (as of October 28, 2025) detached garage or detached accessory building/structure with smaller setbacks or separation, a detached ARU may use that building's minimum side yard, rear yard and separation from the main dwelling.
• Sections 6.4.2–6.4.4: the maximum number and type of ARUs may be limited by the 2024 Provincial Planning Statement, Oak Ridges Moraine Conservation Plan, Greenbelt Plan, Niagara Escarpment Plan or Bolton Special Policy Area (provincial plan/SPA prevails on conflict); ARUs must comply with the Minimum Distance Separation Formulae and, in a conservation-authority regulated area, with Section 2.9.
• Multiplex Dwellings (Section 6.5.1, Table 6.5) – 2 dwelling units: min lot area 295 m2; min lot frontage 9.75 m interior lot / 13.5 m corner lot; max building area 45%; max height 10.6 m sloped roof, 8.1 m flat roof; max driveway width 6.0 m; min driveway setback 0.6 m (not applicable between lots belonging to the same multiplex dwelling); min landscaping 20%; min front yard 5.6 m to the front wall of an attached garage / 4.5 m to the front wall of the main building; min interior side yard 1.2 m; min exterior side yard 4.5 m; min rear yard 7.5 m.
• Multiplex Dwellings (Table 6.5) – 3 or 4 dwelling units: min lot area 495 m2; min lot frontage 19 m; max building area 50%; max height 11.0 m; max driveway width 6.0 m; min driveway setback 0.6 m (not between lots of the same multiplex dwelling); min landscaping 20%; min front yard 5.6 m to attached garage wall / 4.5 m to main building wall; min interior side yard 3.0 m; min exterior side yard 4.5 m; min rear yard 7.5 m.
• Section 6.5.2: notwithstanding 6.5.1 and Section 13.1, in an existing site-specific RMD (or R1, R2, RT, RM) zone within an urban settlement area established prior to (September XX, 2025 – placeholder date in the source), a multiplex dwelling of up to 4 dwelling units is permitted under the site-specific standards of the existing zone provided that: (a) the Table 6.5 minimum lot area and lot frontage for the intended number of units are met; (b) the maximum building area does not exceed 10% of the existing zone requirement; (c) the maximum building height is no greater than 11 m or the existing zone requirement, whichever is greater; and (d) the Table 5.1 minimum off-street parking for the intended number of units is met.
• Section 6.5.3: where site-specific multiplex dwelling standards exist in an exception zone, those apply in lieu of Section 6.5, including Table 6.5. Section 6.5.4: on conflict with a provincial plan or Special Policy Area, the provincial plan or Special Policy Area prevails.