What Are Legal Suite Fire Separation Requirements in Calgary?
Fire Separation Requirements for Calgary Legal Suites
The Alberta Building Code (Section 9.32) mandates fire separation between a primary residence and legal suite to prevent rapid fire spread. In Calgary, these requirements are strictly enforced during permit review and final inspection.
Required Fire-Rated Assembly
Your legal suite in Calgary must have a minimum 1-hour fire-rating separation, achieved through:
- Drywall: Two layers of 5/8” Type X gypsum board on both sides of wall studs
- Doors: Solid-core or metal doors with automatic self-closing mechanisms and door gaskets
- Caulking: All cracks and gaps sealed with fire-rated caulk (not standard caulk)
- Penetrations: Electrical outlets, pipes, and HVAC ducts sealed with fire blankets or fire-stop collars
Calgary Permit Inspection Process
The City of Calgary requires:
- Framing inspection before drywall installation
- Rough-in inspection (electrical, plumbing, HVAC)
- Fire-separation inspection before drywall closure
- Final inspection with third-party fire-rating certification
Common Mistakes That Fail Inspection
- Single-layer Type X drywall (requires two layers)
- Standard latex caulk instead of fire-caulk
- Missing door gaskets or self-closing hinges
- Unsealed utility penetrations
- Inadequate documentation of materials used
Cost Breakdown
| Item | Estimated Cost |
|---|---|
| Fire-rated drywall materials (1,000 sq ft) | $1,200–$1,600 |
| Fire-rated doors (2 units) + hardware | $800–$1,200 |
| Fire-caulk and penetration sealing | $300–$500 |
| Third-party fire-rating inspection | $400–$600 |
| Labour (drywall + sealing) | $2,000–$3,000 |
| Total estimate | $4,700–$6,900 |
These costs vary based on suite size and complexity. A typical 600 sq ft Calgary legal suite runs $4,500–$6,500 for fire separation work alone.
Why This Matters
Fire separation protects both units in an emergency. Calgary inspectors reject permits with shortcuts—rework is expensive. Plan for proper materials and labour upfront.
Get your legal suite project started with OAF Construction Corp.