The ballpark
Legalizing an already-finished basement suite in Calgary typically runs $25,000–$60,000, depending mostly on how much the existing layout needs to be moved to hit code. If egress windows are already installed and the layout is compliant, you can be at the low end. If ceilings need to be lowered for fire separation and the bathroom needs to move, expect the high end.
Building a new backyard or garage suite is a different exercise entirely — closer to a small custom home, at $150,000–$300,000 depending on finishes and whether the garage below is included in the build.
Where the money goes
- Development & Building Permits — $1,500–$3,500
- Egress windows (2) — $6,000–$12,000 installed
- Fire separation drywall & firestopping — $3,000–$6,000
- Interconnected smoke/CO alarms — $600–$1,200
- Kitchen fit-out — $8,000–$20,000
- Bathroom (new or upgraded) — $6,000–$15,000
- Electrical (sub-panel, laundry circuit) — $3,000–$6,000
- HVAC (fresh air, HRV, ducting) — $2,500–$5,000
- Sound insulation — $1,500–$3,000
Grants and incentives
The City of Calgary has historically offered incentive grants for legalizing existing suites — most recently the Secondary Suite Amnesty program and a rebate for permit fees. Program availability changes year to year; check the City's current secondary suites page before you budget.