Custom homes · Oshawa
Custom Home Builder in Oshawa
Perimeter Homes is a custom home builder for Oshawa. We handle knockdown-rebuilds and new homes on your lot, checked against Oshawa's own rules before design starts.
Building in Oshawa
What shapes a custom home in Oshawa
We build in Kedron, Samac, the O'Neill area, Centennial and the older lots north of downtown. Larger older lots north of downtown and in established areas suit rebuilds. Watch rail and highway setbacks.
How many units the lot allows
Oshawa allows up to three residential units on a lot, with at most one in an accessory building, in its R1, R2, R3, R5 and specified other zones.
Source: City of Oshawa: Accessory apartments, as of November 1, 2026A local rule to know
Oshawa sets minimum distances for accessory dwellings: 30 m from a railway right-of-way, 14 m from Highway 401/407 property and 7 m from a pipeline corridor.
Source: City of Oshawa: Accessory apartments, as of November 1, 2026Province-wide baseline
Ontario's Planning Act and O. Reg. 299/19 allow up to three residential units on a serviced urban residential lot, which matters if you want a suite in your new house or a garden suite out back.
Source: O. Reg. 299/19, as of November 1, 2026Permits, demolition and warranty
Ontario's Building Code Act requires a permit to construct or demolish, so a knockdown-rebuild needs both. New homes must be built by a builder licensed by the Home Construction Regulatory Authority and enrolled for the Tarion new home warranty.
Source: Building Code Act, 1992, as of November 1, 2026Check with the city: zoning, trees, heritage and conservation rules depend on your exact lot. We confirm them with the municipality before design starts.
Real Perimeter work
Custom homes we've built
We don't have a finished project to show you in Oshawa yet, so the photos below are real Perimeter custom homes elsewhere: Poplar Drive in Burlington, Birch Hill Lane in Oakville and Watersedge in Mississauga. Each one is labelled.
How it works
From your lot to keys
Lot and zoning check
We review your Oshawa lot against the local by-law, trees and any conservation or heritage rules.
Design
Plans built around your lot and family, including a suite or garden suite if the lot allows one.
Permits
Demolition (if needed) and building permits, plus any variances.
Build
Stick-built on site by the Perimeter team. If speed matters, a factory-built option is available too.
Other ways to build in Oshawa
Nearby
Common questions
FAQ
How many units can I build on a lot in Oshawa?
Oshawa allows up to three residential units on a lot, with at most one in an accessory building, in its R1, R2, R3, R5 and specified other zones.
Do I need a permit to knock down a house in Oshawa?
Yes. Ontario's Building Code Act requires a permit to demolish and another to construct.
Have you built in Oshawa?
Not a finished project yet. Our nearest completed custom homes are in Burlington, Oakville and Mississauga.
Where is Perimeter Homes based?
258 Springbrook Ave, Ancaster, ON. We build across Southern Ontario.
Start here
Talk to a custom home builder in Oshawa.
Dan Carrol and the Perimeter Homes team reply within one business day. A phone number is required so we can call you about your lot.