What is the cost difference between a top-vent and side-vent dryer duct installation in a GTA condo?

A side-vent dryer duct installation in a GTA condo typically costs $200 to $500, while a top-vent (vertical) installation runs $400 to $900 — roughly double the cost due to the added complexity of routing ductwork vertically through cabinetry, ceilings, or chase walls to reach an exterior termination point.

The cost difference comes down to routing complexity and run length. A side-vent installation is the simpler of the two — the dryer exhausts horizontally through a short duct run to an exterior wall. In most GTA condo layouts, the laundry area is near an exterior wall, making a side-vent the most straightforward option. The installation involves rigid or semi-rigid aluminum duct (never flex duct or foil accordion duct for dryer vents — these trap lint and are fire hazards), a wall cap with a backdraft damper, and typically a run of 5 to 15 feet. Materials cost $50 to $150, and labour runs $150 to $350 for a clean installation with proper sealing.

Top-vent installations are more involved because the exhaust must travel vertically, often through a cabinet chase or dedicated soffit, before reaching an exterior termination. In high-rise GTA condos, the dryer vent may need to connect to a shared vertical exhaust riser that runs up through multiple floors to the rooftop — in which case you're working within the building's existing exhaust infrastructure and the installation cost depends on the distance to the riser connection and any modifications needed. Connecting to an existing shared riser typically costs $400 to $700, while a standalone vertical vent through a single-storey ceiling to an exterior wall or roof runs $500 to $900.

Condo-specific considerations in the GTA significantly affect both cost and feasibility. Most condo corporations require approval from the property manager or board before any duct modifications, and some buildings have strict rules about which venting configuration is permitted. Buildings with shared dryer exhaust risers typically require you to connect to the existing riser — you can't just punch a hole in an exterior wall. If your unit is on a higher floor, the exterior wall may not be an option at all due to wind loading on the vent cap and aesthetic restrictions on the building facade.

For either installation type, the dryer vent duct must be rigid or semi-rigid aluminum — the Ontario Building Code and dryer manufacturers require smooth-walled metal duct to minimize lint accumulation and reduce fire risk. The maximum recommended run length is 25 feet for straight runs, with each 90-degree elbow reducing the allowable length by 5 feet and each 45-degree elbow reducing it by 2.5 feet. If your condo layout requires a run longer than the maximum, a dryer vent booster fan ($150 to $300 installed) may be needed to maintain adequate airflow.

Always hire a qualified installer for condo dryer vent work rather than attempting a DIY installation. Improper dryer venting is a leading cause of residential fires, and condo corporations typically require professional installation with documentation. Annual dryer vent cleaning ($100 to $200) is essential regardless of the venting configuration — lint buildup reduces drying efficiency and creates a serious fire hazard.

Need help finding a contractor for your condo dryer vent installation? Toronto Ductwork can match you for free through the Toronto Construction Network.