Additions and ADU in Oshawa

Home Additions and Accessory Dwelling Units in Oshawa, Ontario

When you love your Oshawa neighbourhood but need more space, a home addition or accessory dwelling unit is often the smartest path forward. Oshawa Renovation Services designs and builds additions and ADUs that seamlessly extend your living space, add real estate value, and — in the case of ADUs — generate rental income that can significantly offset your renovation investment.

Our team has navigated Oshawa's planning approvals, zoning requirements, and building permit processes dozens of times, meaning your project starts on the right foot and finishes without regulatory surprises.

Our Additions and ADU Services in Oshawa

Main-Floor and Second-Storey Additions

A main-floor addition extends your Oshawa home's footprint outward — adding a family room, a larger kitchen, a main-floor primary suite, or a sunroom. Second-storey additions stack new bedrooms and bathrooms above the existing main floor — ideal for Oshawa lots with limited yard space. Both project types require structural engineering, foundation work, and careful integration with the existing home — all of which our Oshawa additions team manages in-house.

Every addition we build in Oshawa is designed to match the existing home's architectural character — window proportions, exterior finishes, trim profiles — so the result looks like it was always part of the original house.

Accessory Dwelling Units (ADUs)

An accessory dwelling unit — whether a detached laneway house, a garage conversion, or a garden suite — is one of the highest-return investments a Oshawa property owner can make. Our team designs and builds ADUs that meet all Ontario Building Code requirements for secondary dwelling units, ensuring the unit is fully legal, properly permitted, and insurable.

Garage Conversions and Garden Suites

Attached or detached garages are some of the most cost-effective spaces to convert into ADUs in Oshawa. We evaluate the existing structure, upgrade insulation and mechanical systems to residential standards, install proper egress windows and doors, and finish the interior to create a comfortable, code-compliant living space. Garden suites on existing Oshawa lots offer another path to adding a legal secondary unit without modifying the main dwelling.

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