Bathroom exhaust fan cost
Installing, replacing and fixing bathroom fans, and venting them outside instead of into the attic.
A bathroom exhaust fan pulls steam and moisture out of the room. Without one, or with one that doesn't work, moisture stays in the bathroom and can lead to peeling paint and mold.
The fan also has to send that air outside. A fan that vents into the attic just moves the moisture there.
What our reports priced these at
| Work | Most homes | Middle price | Based on |
|---|---|---|---|
| Install a bathroom exhaust fan | $1,200 to $1,220 | The 15% of homes where it was priced | |
| Replace a bathroom exhaust fan | About $450 | The 9% of homes where it was priced | |
| Fix a bathroom exhaust fan | $150 to $180 | $150 | The 7% of homes where it was priced |
| Vent a bathroom fan outside | $500 to $700 | $500 | Limited number of homes |
What HomeCloud reports priced this fix at in homes we evaluated Sep 2025 to Oct 2026. The range is the middle half of homes; the middle price is the median. Your price comes from a written estimate for your home.
What affects the price
- New or replacement
- Swapping a fan where one already exists costs much less than adding one where there's no fan, duct or wiring.
- Route to the outside
- The duct has to run through the attic to the roof or an outside wall. A longer or harder route costs more.
- Wiring
- A new fan may need new wiring and a switch.
- Access above
- A bathroom under an attic is easier to work on than one under another floor.
- The fan
- Quieter fans and fans with humidity sensors or lights cost more.
Common questions
Why can't the fan vent into the attic?
The moist air it pulls out of the bathroom ends up on the attic wood and insulation, where it can lead to mold and rot.
More insulation and ventilation resources
Other insulation and ventilation repairs
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