Orleans’ older core suits a basement legalization or a garden suite ($260-$480 per sq ft, 6-10 months); newer sections lean to basement apartments ($90-$220, 3-5 months) or a smaller coach house. Second Dwelling Unit Ottawa designs, permits and builds them in Orleans.
Existing basement units can be legalized
Newer lots have tighter setbacks
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About this area
ADU building in Orleans
Orleans is Ottawa’s largest suburban community by population, spread across the Orléans East-Cumberland, Orléans West-Innes, and Orléans South-Navan wards, with a housing history that runs from 1970s-era streets near St. Joseph Boulevard to newer developments still filling in toward Cumberland and Navan.
Recent project
Recent Project in Orleans
A basement in Orleans at the drywall stage. The ceiling and bulkheads are boarded, sheets are going up on the walls, and the cutting station is set up on the floor to fit each piece on site.
What makes Orleans different
An established core with older housing stock
The neighbourhoods closest to the Ottawa River and St. Joseph Boulevard – areas like Convent Glen and Fallingbrook – were largely built out through the 1970s, 80s, and 90s, on lots that generally run larger than what's typical in Ottawa's newest subdivisions. That combination of age and lot size makes both basement apartment legalization and detached garden suites realistic options here, depending on what the individual property's basement ceiling height and rear yard depth allow.
Newer Orleans, newer constraints
Sections built since the 2000s – parts of Avalon, Fallingbrook's later phases, and the areas pushing toward Cumberland – tend to have tighter lot sizes and setbacks than Orleans' older core, which shifts the practical ADU options toward basement conversion or a smaller-footprint coach house rather than a full-size detached garden suite.
We start with a site visit
Orleans' lot sizes and setbacks vary between its older core and newer phases – the first step on any property is a site visit to measure your actual lot and confirm what your specific zoning allows.
Legalizing what's already there
Because so much of Orleans' housing predates current Additional Dwelling Unit zoning, a meaningful share of the basement apartments already in use here were built before permits were required or before current fire and egress standards existed. Legalizing one of these units usually means an assessment of what's already built against today's code, then targeted upgrades – not a full teardown and rebuild – to bring it into compliance.
Orleans ADU question
I have an unpermitted basement apartment in an older Orleans home – what's involved in legalizing it?
We assess the existing space against current egress, fire separation, and ceiling height requirements, then scope only the work needed to close any gaps before filing a retroactive building permit. See our legalization service for the full process.
Who rents secondary suites in Orleans?
Orleans sits close to CFB Rockcliffe and within a reasonable commute of several federal government campuses on the east side of the city, which has historically supported steady rental demand for secondary suites here – both from military and federal personnel posted to the area on shorter-term assignments and from the broader east-end rental market.
Planning a project in Orleans
Place d'Orléans and the surrounding St. Joseph Boulevard corridor give Orleans its own commercial centre, separate from downtown, which is part of why the community has long supported a steady local rental market rather than depending entirely on downtown commuters.
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