What do home inspectors consistently flag in GTA homes with renovation work? This is essential knowledge for both sellers and buyers in 2026.
Top renovation deficiencies found by GTA inspectors:
1. Unpermitted work (most common serious finding)
Evidence: altered structure without permit history, finished basements without permits, electrical modifications without ESA documentation. Implication: unknown code compliance, potential insurance issues, buyer financing problems.
2. Improper electrical
Double-tapped circuit breakers, ungrounded outlets in wet areas (bathroom, kitchen), DIY wiring without permits, live knob-and-tube circuits mixed with modern wiring.
3. Attic insulation errors
Compressed insulation (loses R-value), blocked soffit vents (causes moisture and ice dams), inadequate vapor barrier.
4. Basement moisture masking
Fresh paint, new LVP, or drywall installed over previous moisture infiltration. Moisture meters and visual inspection often reveal this.
5. Improper bathroom ventilation
Fan that vents into attic instead of exterior. Code violation that causes moisture damage and mold over time.
6. Improper deck construction
Ledger board not properly flashed (leads to rot at house junction), incorrect fasteners, footings not below frost line (required in Ontario, typically 1.2m depth).
The permit signal:
Inspectors and sophisticated buyers use permit history as a proxy for renovation quality. A seller with complete permit history and final inspection certificates has a significantly stronger negotiating position than one who says “it was all done professionally” without documentation.
What renovation deficiencies have you found in GTA homes you’ve inspected or purchased?
home.renovation.reviews — Canada’s renovation community.