Ottawa secondary dwelling units

A basement unit designed around the house you already own.

Opvion coordinates the construction details behind a functional lower-level unit—from feasibility and drawings to entrances, life-safety work, trades, finishes and inspections.

Start with feasibility, not finishes.

The right first question is not which flooring to choose. It is whether the proposed unit can work with the existing entrance routes, ceiling heights, windows, structure, plumbing, electrical service, heating and property constraints.

We begin by understanding how the space will be used, what already exists, and which site conditions need closer review before drawings or detailed pricing.

Important: A basement becomes an approved secondary unit only through the applicable project-specific design, permit and inspection process. No website or preliminary discussion can guarantee approval.

Typical construction scope

  • Layout, framing and insulation
  • Fire and sound separation work
  • Kitchen and bathroom construction
  • Plumbing, electrical and HVAC coordination
  • Separate entrance and exterior work
  • Bedroom egress and window wells
  • Drywall, doors, trim and flooring
  • Inspection-stage coordination

What we review before a detailed proposal

Useful early information includes the property address, intended number of bedrooms, approximate ceiling and beam heights, existing mechanical locations, panel and service information, exterior grading, entrance options, target start window and any existing plans.

A practical path from idea to construction

  1. Qualification call: confirm goals, budget range, timing and basic fit.
  2. Site review: verify measurements, access and visible constraints.
  3. Design and approvals: define drawings, professional input and permit responsibilities in writing.
  4. Controlled proposal: issue scope, exclusions, allowances and payment milestones.
  5. Construction: coordinate the approved work, trades, inspections and closeout.

Early planning saves rework

Let’s review whether the project is a fit.

Share the basics now. We’ll recommend a call, site review or pre-construction step based on the information available.

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