What inspections are required for a basement development in Calgary?

A typical Calgary basement development requires four to six inspections by a Safety Codes Officer, progressing through each construction stage before you can cover up the previous work with finishes. These inspections verify that the work meets the Alberta Building Code and protect both your investment and your family's safety.

The first inspection is the framing inspection, which occurs after all walls, bulkheads, and blocking are in place but before any insulation or drywall is installed. The Safety Codes Officer checks that stud walls are properly built and spaced, load-bearing elements have not been compromised, fire blocking is installed where required (particularly at the top of stud walls where they meet the floor joists above), and egress window rough openings meet minimum dimensions — 3.77 square feet unobstructed opening, minimum 15-inch width, and maximum 39-inch sill height from the finished floor.

Electrical rough-in inspection happens after all wiring, boxes, and circuits are run but before drywall covers them. The Safety Codes Officer verifies proper wire gauge for each circuit, box fill calculations, GFCI protection in wet areas (bathrooms, bar sinks, laundry), smoke and carbon monoxide detector locations and interconnection, and that the electrical panel or subpanel has adequate capacity. In many older Calgary homes — particularly 1960s to 1980s homes in suburbs like Dalhousie, Canyon Meadows, and Woodbine — the existing 100-amp panel may need upgrading to 200 amps at $2,500 to $4,500 to handle the additional basement circuits.

Plumbing rough-in inspection is required if you are adding a bathroom, wet bar, or laundry. The inspector checks drain slope, venting, trap installation, and backflow prevention. If you are breaking the concrete slab for new drain lines, the underground plumbing must be inspected before the concrete is patched.

Insulation and vapour barrier inspection is a critical stage where the Safety Codes Officer verifies that insulation meets the minimum R-20 requirement for below-grade walls in Calgary's climate zone, that the vapour barrier (6-mil polyethylene) is properly installed on the warm side of the assembly with all seams sealed, and that no gaps or compressed areas compromise the thermal envelope. If you are using closed-cell spray foam at 2 inches or greater, it acts as its own vapour barrier and the poly is not required — but the inspector will verify thickness.

The final inspection occurs after all drywall, flooring, trim, fixtures, and finishes are complete. The officer checks that smoke and CO detectors are installed and functional, bathroom exhaust fans vent to the exterior, egress windows operate correctly, all electrical fixtures and outlets are properly installed, and the space meets minimum ceiling height requirements of 6 feet 5 inches for existing homes.

If your project includes a secondary suite, additional inspections verify the 1-hour fire-rated separation between units, fire-rated doors with self-closers, and separate smoke and CO detection systems.

Never cover up work before an inspection passes. Tearing out drywall to expose failed rough-in work is expensive, frustrating, and entirely avoidable. Browse qualified basement contractors through the Calgary Construction Network directory at calgaryconstructionnetwork.com.