Additions and ADU in Whitby | Oshawa Renovation Services

Additions and ADU in Oshawa, Ontario

When you love your Oshawa neighbourhood but need more space, a home addition or accessory dwelling unit (ADU) is often the smartest solution available. Oshawa Renovation Services designs and builds home additions and ADUs across Oshawa 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 home base — serving every Oshawa neighbourhood from Allandale to Painswick. Our additions and ADU team has navigated Oshawa's planning approvals, zoning requirements, and building permit processes dozens of times.

Main-Floor and Second-Storey Additions

A main-floor addition in Oshawa extends your home's footprint outward — adding a family room, larger kitchen, main-floor primary suite, or sunroom. Second-storey additions are ideal for Oshawa homeowners on lots with limited side or rear yard space. Both project types require structural engineering, foundation work, and careful integration with the existing roofline.

Accessory Dwelling Units (ADUs) in Oshawa

An ADU — whether a detached laneway house, garage conversion, or self-contained suite above an existing structure — is one of the highest-return investments a Oshawa property owner can make. ADUs can serve as rental income properties, multigenerational living spaces, or private home offices. We handle zoning pre-consultation, all building permit applications, structural design, mechanical rough-ins, and finish construction.

The Additions and ADU Process in Oshawa

Site and Zoning Review — confirm setbacks, lot coverage, and ADU eligibility in Oshawa
Design and Engineering — architectural drawings and structural engineering
Permit Application — full submission and follow-up with Oshawa building department
Foundation and Framing — structural construction with experienced crews
Mechanicals and Insulation — electrical, plumbing, HVAC, insulation to code
Finishing and Handover — drywall, flooring, paint, fixtures, final inspection

We serve all Oshawa neighbourhoods including Allandale, Holly, Painswick, Innis-Shore, Letitia Heights, Sunnidale and surrounding areas.

More Renovation Services in Oshawa

Kitchen Renovations in Oshawa Bathroom Renovations in Oshawa Basement Finishing in Oshawa Home Renovations in Oshawa General Contracting in Oshawa Decks and Outdoor Living in Oshawa Commercial Renovations in Oshawa Flooring in Oshawa

Additions and ADU in Other Nearby Cities

Additions and ADU in Ajax Additions and ADU in Pickering Additions and ADU in Clarington Additions and ADU in Brooklin Additions and ADU in Port Perry Additions and ADU in Bowmanville

Additions and ADU in Oshawa