Streetsville's houses come in three generations. Brick homes from the 1800s stand on the streets off Queen Street South, bungalows and side-splits from the 1950s, 60s and 70s fill Vista Heights and Riverview, and River Grove, across the Credit, filled in during the late 1980s. A kitchen or basement in each generation raises its own questions, from which walls carry the roof to what the street is allowed to see.
Vista Heights and Riverview, the post-war half of Streetsville
Streetsville's suburbs began in 1953, when Vista Heights was laid out southwest of the old village and Riverview on its far side, just north of Britannia Road and east of Queen Street. The pair are often described as two of the first suburbs in Canada, and the local council took the then-unusual step of making the Vista Heights developer build an elementary school, which opened in 1955. Vista Heights has wide streets and generous lots, with bungalows, back-splits and side-splits mixed in with later two-storey houses. Riverview filled in mostly through the 1960s and 70s with bungalows and split-levels, plus some townhouses. In both, a few originals have already given way to custom rebuilds.
Many original houses in both areas still have the plan they were built with: a closed kitchen at the back, a living room across the front and bedrooms down a short hall. The changes that suit them are fairly predictable: a kitchen that opens to the living space, a second bathroom, and a lower level that works as proper living space or a separate suite. A wide lot also leaves room to consider a rear addition. That brings zoning review and a full set of drawings, which a designer prepares and which go to the City of Mississauga's Building Division through its ePlans portal, and close to the valley a second approval described further down.
The old village along Queen Street South
The founder's own house still stands at the foot of Mill Street: Timothy Street built it of brick around 1825, looking over the river where his grist and saw mills ran. Queen Street South keeps Victorian brick houses with Gothic Revival gables and decorative vergeboard trim, and Ontario Regency houses from the 1840s and 1850s survive on Thomas Street and Mill Street. In December 2024, Mississauga's council made these streets the Streetsville Heritage Conservation District, the city's third after Meadowvale Village and Old Port Credit Village, and its plan counts the commercial core, the residential streets around it and the Credit River valley lands among the heritage attributes.
For owners, designation mostly changes the outside of a renovation. Alterations to a building's heritage attributes, additions, new construction and demolition go through a heritage permit application with the City, in addition to the building permit. Additions have to sit at the rear or side, with a roof ridge no higher than the original house's, and for new construction the plan sets out expectations for height, massing, setbacks, roof pitch and exterior materials. Interiors are outside the plan's reach, so a kitchen or bathroom rebuilt within the original walls needs only whatever building permit applies. Where a project does touch the exterior, such as a wider window opening or a rebuilt front porch, we take it to the City's heritage planners while the design is still flexible, because their comments can change the drawings.
Where the yard ends at the Credit
The old village grew on the river's west bank, and a number of Streetsville streets, in Riverview especially, back onto the valley. Those lots answer to Credit Valley Conservation as well as the City. Under Ontario Regulation 41/24, CVC permission can be needed for a new building or addition, a shed, a deck, site grading or major landscaping with fill anywhere inside its regulated area, which takes in floodplains and valley slopes. CVC's board approved redrawn regulation maps in February 2026, so an answer someone got about the same yard a few years ago may no longer hold. We look the address up on CVC's online map before the estimate is final, and if the lot is inside, that conversation goes at the front of the schedule rather than after the building permit.
Streetsville has been part of Mississauga since 1974; houses elsewhere in the city, from the lakeshore to Meadowvale, are covered on our Mississauga page.