What is the price to reroute ductwork during a Toronto kitchen renovation?

Rerouting ductwork during a Toronto kitchen renovation typically costs $500 to $3,000 per run, with most kitchen projects requiring one to three duct relocations for a total ductwork budget of $1,000 to $6,000. The wide range reflects the enormous variation in what rerouting actually involves — moving a single floor register a few feet is straightforward, while relocating a main trunk line to accommodate a new island or open-concept layout is a significant structural and mechanical undertaking.

Kitchen renovations are one of the most common reasons GTA homeowners need ductwork modifications. Opening up a wall between the kitchen and dining or living room typically means relocating supply ducts and returns that ran through the wall being removed. Installing a kitchen island with a downdraft vent or relocating the range to an island requires running new exhaust ductwork through the floor system. Upgrading to a large range hood — anything over 400 CFM — triggers the Ontario Building Code requirement for a make-up air system when total exhaust exceeds 75 litres per second, adding $2,000 to $5,000 to the project if one is not already in place.

The biggest cost driver is accessibility. If your kitchen is above an unfinished basement, the contractor can access and modify ductwork from below relatively easily, keeping costs toward the lower end. If the kitchen is on the second floor or above a finished basement ceiling, rerouting ducts means opening up ceilings, routing through floor cavities, and then patching and refinishing — the drywall and finishing work can cost as much as the ductwork itself. Homes built in the 1950s through 1970s across Scarborough, North York, and Etobicoke often have ductwork running through interior walls that are being removed for open-concept layouts, and rerouting these runs through the floor system or soffit adds complexity.

Timing is critical. Ductwork modifications should happen early in the renovation sequence — after demolition but before framing closes up. Coordinate your ductwork contractor with your general contractor so ducts are relocated before new walls, cabinets, and flooring go in. Trying to modify ductwork after the kitchen is partially finished is dramatically more expensive and disruptive.

A building permit may be required if you are significantly modifying the duct layout, adding new trunk lines, or installing a make-up air system. The City of Toronto mechanical permit fees typically run $200 to $800 depending on scope. Any electrical work for exhaust fans or range hood wiring requires an ESA-Licensed Electrical Contractor. If your renovation involves gas line relocation for a gas range, a TSSA-registered contractor must handle that work.

Get at least three quotes from ductwork contractors before your renovation begins. Toronto Ductwork can match you with experienced local professionals through the Toronto Construction Network for free estimates.