Housing · 6 min read

Before adding a unit: a missing middle feasibility checklist

An additional unit, conversion or compact multi-unit project should begin with a property-specific review, not a floor plan.

1. Local permissions

Confirm the applicable municipal zoning, the property’s designation and the type and number of units being considered. Provincial and local rules work together, and permissions vary by address.

2. Existing building and site conditions

Evaluate the existing structure, access, parking, setbacks, lot coverage, drainage and servicing. These constraints shape what can reasonably be designed and built.

3. Approvals and professional input

Building permits, municipal submissions, structural input and other specialist work may be needed. Establish the design and approval path early so the schedule and budget reflect the actual work.

4. Construction scope and budget

Separate design, approvals, structure, services, fire separation, finishes, site works and contingency. A scope-based budget is more useful than a single generic cost-per-square-foot estimate.

5. Financing and operations

Discuss financing and projected income with qualified financial and lending professionals. Consider operating costs, insurance, maintenance and management before construction begins.

6. Delivery plan

Decide who coordinates the consultants, permits, trades, inspections and close-out. Clear responsibilities protect the schedule and reduce avoidable changes.