Laundry room renovations are often permit-required and frequently have code violations. Here’s the complete breakdown for 2026.
Permit requirements:
- New plumbing rough-in (new laundry location): building permit required
- Moving existing washer drain/supply: permit required
- Like-for-like appliance replacement: no permit
- Dryer circuit (240V/30A): ESA permit required regardless
Dryer venting – OBC rules:
Most common laundry code violation:
- Must vent to exterior (never into wall cavity, attic, or lint bucket)
- Smooth-wall rigid metal duct only (flexible foil = fire hazard)
- Max duct run ~15m (50 ft) equivalent, with reductions per elbow
- Termination: louvered exterior vent cap with pest screen
Washer drain standpipe:
- Minimum 2" diameter
- 18-42 inches above trap weir
- Accessible trap required
- Floor drain recommended (required in some multi-unit standards)
GTA cost ranges (2026):
- Cosmetic refresh (paint, fixtures, organization): $1,500-$4,000
- Full reno with cabinetry, sink, tile floor (existing plumbing location): $8,000-$18,000
- New laundry creation (new plumbing + electrical rough-in): $12,000-$28,000
Laundry room and plumbing questions at home.renovation.reviews