Dumfries Dr, Markham: what could be built

Second units and garden suites

100% of the 32 residential lots on Dumfries Dr screen as likely to allow a garden suite; 100% a second unit in the house.

• Garden suite likely: 32 lots (100%).
• Third unit likely: 32 lots (100%).

Ontario's Planning Act (s. 35.1) and O. Reg. 462/24 allow up to three units on most serviced urban house lots; the municipal by-law sets the rest. Lot depth is estimated from lot lines, not a survey.

Source: Province of Ontario and the municipality, Planning Act s. 35.1, O. Reg. 462/24 and the municipal by-law, screened lot by lot by LSG Realty (2026-11-01); York Region, Regional Official Plan 2022, Map 1 (Urban Area, Towns and Villages) (2026-11-01); Statistics Canada, 2021 Census census subdivisions (cartographic boundary file) (2026-11-01); York Region, Parcel (property boundaries across York Region) (2026-11-01). Screened 2026-11-02.

Lot sizes

Median lot 642 m² (6,910 sq ft); half of the lots are between 610 m² and 711 m² (32 lots).

Source: York Region, Parcel (property boundaries across York Region) (2026-11-01).

Flood, Oak Ridges Moraine and Greenbelt

• Partly or wholly in a conservation authority regulated area (flood and erosion hazards): 0 lots (0%).
• In the Oak Ridges Moraine countryside, natural core or linkage areas: 0 lots (0%).
• In the Greenbelt's protected countryside or urban river valleys: 0 lots (0%).

Source: Toronto and Region Conservation Authority, TRCA Regulated Area (Regulation Limit 2025, O. Reg. 41/24) (2026-11-01); Lake Simcoe Region Conservation Authority, Regulation Limit (O. Reg. 41/24) (2026-11-01); Province of Ontario, Oak Ridges Moraine land use designations (2017 Plan) (2026-11-01); Province of Ontario, Greenbelt designations (2017 Plan) (2026-11-01).

Active development applications

0 active applications (rezonings, site plans, subdivisions, minor variances, consents) near Dumfries Dr.

Source: York Region, Active Development Application Boundaries (York Region's review of applications in its nine municipalities) (2026-10-27). Within 150 m of the street's lots.

Building permits, last 12 months

Markham does not publish building permits as open data that we can show.

Upcoming residential projects

No upcoming residential projects found within 300 m.

Source: York Region, Planning applications and building permits (residential projects) (2026-10-27). Within 300 m of the street's lots.

Rapid transit within 800 m

No subway, GO, LRT or rapid bus station within 800 m.

Source: TTC, Metrolinx and York Region Transit, Rapid transit stations (the map's transit layer) (2026-10-31).

Everyday needs

Everyday Needs score 59/100 · walking 39 · driving 79 (average over 32 residential lots)

• 0% of lots within a 10-minute walk of a grocery store
• 0% of lots within a 10-minute walk of a transit stop

Nearest from the middle of Dumfries Dr:

• Grocery store: 16 min walk (Grocery store) · 4 min by car
• Pharmacy: 17 min walk (Shoppers Drug Mart) · 4 min by car
• Transit stop: 24 min walk (Warden Ave at Calvert Rd (TTC))
• Shopping centre: 14 min walk (王府井) · 3 min by car
• Emergency department: over 60 min walk · 23 min by car (North York General Hospital)
• Hospital: over 60 min walk · 22 min by car (Shouldice Hospital)

Source: LSG Realty, Everyday Needs score (LSG's own travel-time estimate) (2026-11-02); © OpenStreetMap contributors, ODbL, OpenStreetMap (Geofabrik Ontario extract): roads, footpaths, supermarkets and grocery stores, pharmacies, shopping centres and department stores, hospitals and emergency departments — Open Database Licence (ODbL) 1.0 (2026-11-02); Ontario Ministry of Health, Ministry of Health Service Provider Locations (MOHSERLO): hospital sites — Open Government Licence – Ontario (2026-11-02); City of Toronto (TTC), Merged GTFS – TTC Routes and Schedules (stops) — Open Government Licence – Toronto (2026-11-02); Metrolinx (GO Transit), GO Transit GTFS (stops) — Metrolinx Open Data Licence (2026-11-02); Metrolinx (UP Express), UP Express GTFS (stops) — Metrolinx Open Data Licence (2026-11-02). LSG estimate from open data: walking on mapped streets and paths at 4.8 km/h; driving at typical weekday rush-hour road speeds (not live traffic). Times are for the 200 m square around each address. Places can open, close or move; check before you rely on one. Places and paths © OpenStreetMap contributors, ODbL.

Public schools

• St Augustine Catholic High School · Secondary · York CDSB · 270 m
• St Monica Catholic Elementary School · Elementary · York CDSB · 450 m
• Ashton Meadows Public School · Elementary · York Region DSB · 510 m
• Lincoln Alexander Public School · Elementary · York Region DSB · 710 m

YCDSB school locator (York Catholic District School Board)YRDSB school locator (York Region District School Board)

Source: Ontario Ministry of Education, Ontario public school contact information (placed by Statistics Canada ODA addresses) (2026-10-29). School catchments change; confirm with the board's school locator.

Water and sewer servicing

Regional capacity assigned; local figure not published · Markham (urban area)

Served by the York Durham Sewage System. York Region assigned about 88,348 persons of new capacity to the cities and towns on the York Durham Sewage System (Dec 11, 2025), bringing total available capacity to 286,992 persons, up to 13 years of growth. The City's own remaining allocation: Not published in the reports we could read. Report.

Source: Province of Ontario (Land Information Ontario), Municipal Boundary – Lower and Single Tier (2026-11-01); York Region, Regional Official Plan 2022, Map 1 – Regional Structure: Urban Area (2026-11-01); York Region, Regional Official Plan 2022, Map 1 – Regional Structure: Towns and Villages (2026-11-01). York Regional Council highlights, Dec 11, 2025: 2025 Servicing Capacity Assignment (2025-12-11).

Neighbourhood profile (2021 Census)

Population (2021)

1,787

Median age

51

Median household income (2020)

$149,300

Owner households

97%

Households with children

49%

Source: Statistics Canada, Census of Population 2021, Census Profile (dissemination areas) (2021-05-11). 2 dissemination areas; medians and shares averaged by population.