Ashburn, VA

How much does it cost to install a bathroom fan?

$150 – $550 existing fan replacement (fan + labor)
$250 – $950 new fan installation (fan + labor)

Bathroom exhaust fan replacement costs $150 to $550. The cost to install a new bathroom fan is $250 to $950 to vent the fan outside through the roof or wall. Toilet extractor fan prices are $50 to $150 on average, plus hiring an electrician or handyman costs $100 to $800 to install.

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Reviewed and approved on July 19, 2021, by Tom Grupa and 6 expert bathroom fan installers on HomeGuide.

Bathroom exhaust fan installation cost

Bathroom exhaust fan installation costs $150 to $550 to replace an existing fan. The cost to install a new bathroom fan is $250 to $950 to vent the fan outside through the wall or roof. The toilet extractor fan itself costs $20 to $400, depending on the type and features.

Bathroom exhaust fan installation cost - chart
Bathroom exhaust fan installation cost - chart

Bathroom exhaust fan installation cost
Installation type Average cost
Replacement $150 – $550
New installation $250 – $950

*Midrange fan with standard features.

Average cost to install a bathroom exhaust fan

The following table shows the average cost to replace a bathroom exhaust fan.

Average cost to install a bathroom fan - chart
Average cost to install a bathroom fan - chart

Average cost to install a bathroom fan
National average cost $360
Minimum cost $100
Maximum cost $1,000
Average range $150 to $550

Cost data is based on 220 project costs reported by HomeGuide members.

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Bathroom exhaust fan with light installed in ceiling
Bathroom exhaust fan with light installed in ceiling

New exhaust fan prices for bathroom

A new exhaust fan for a bathroom costs $20 to $400 without installation, depending on the type and features.

  • A basic toilet exhaust fan costs $20 to $50.
  • A high-end, EnergyStar-rated bathroom exhaust fan with lights, motion and humidity sensors, and adjustable speed costs $200 to $400.
New exhaust fan prices
Type Average fan cost
Adjustable speed fan $90 – $380
Basic - fan only $20 – $50
Ceiling-mounted fan $20 – $400
Continuous run fan $120 – $330
Exterior fan $150 – $335
Fan with Bluetooth $75 – $190
Fan with heater $90 – $280
Fan with humidity or motion sensing $100 – $400
Fan with light fixture $40 – $330
Fan with light and heater $50 – $365
Fan with timer $95 – $295
Inline fan $100 – $310
Wall-mounted fan $20 – $345

*Not including installation labor.

Inline bath exhaust fans are installed in remote locations, connect to multiple ventilation fans, and reduce noise.

New bathroom exhaust fan installed through ceiling
New bathroom exhaust fan installed through ceiling

Bathroom extractor fan prices by sones rating

Fan sound levels are measured in sones. The higher the sones rating, the louder the fan. Quieter bathroom ventilation fans cost more. Straight and smooth ductwork also minimizes fan noise.

Bathroom extractor fan prices by sones rating
Sones rating Loudness Average cost
Under 1.5 Quiet $40 – $400
1.5 – 3.0 Moderate $35 – $300
Over 3.0 Loud $20 – $250

*Not including installation labor.

Bathroom exhaust fan cost by room size & CFMs

Bathroom extractor fans need at least one cubic foot per minute (CFM) for each square foot of bathroom floor space.

For bathrooms over 100 square feet:

  • Add 50 CFM per toilet, bath, shower, or combination.
  • Add 100 CFM for whirlpools.
Exhaust fan cost by room size
Room size (square feet) CFMs needed Average fan cost
Under 79 50 – 80 $20 – $250
80 – 99 80 – 99 $50 – $325
100 – 149 100 – 149 $55 – $400
Over 150 150+ $100 – $400

*Not including installation labor.

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Cost to install a bathroom fan

Installing a new bathroom exhaust fan costs $200 to $800 in labor alone and requires electrical wiring, ductwork, venting, and sometimes roof work. Most electricians and handymen charge $40 to $100 per hour to install bathroom fans and take 4 to 8 hours.

Cost to install a bathroom fan
Type Average cost
New bathroom exhaust fan unit $50 – $150
Labor and installation cost $200 – $800
Total cost to install $250 – $950

*For a mid-range fan with standard features.

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Labor cost factors include the fan type, bathroom location, outside vent location, existing wiring conditions, and overall complexity.

Complex installations may require multiple pros:

Handyman installing bathroom fan that vents through roof
Handyman installing bathroom fan that vents through roof

Bathroom vent installation cost

New air ducts may be required to provide vent access to the outside. Ductwork installation costs $50 to $150 on average for a bathroom vent.

  • Bathroom fans must vent to the outside through a sidewall, roof, or behind a gable or soffit.
  • Connecting ducting to an existing roof or wall vent is possible but may cause airflow and condensation problems inside the home due to back drafting.
  • Bathroom fans typically come with 3", 4", or 6" duct sizing.

Cost to install bathroom exhaust fan through roof

Installing a bathroom exhaust fan through the roof costs $350 to $950, plus permit fees. The cost depends on the bathroom location, accessibility, and roof type. Avoid roof venting when possible because it's more prone to leaks than sidewall venting.

Installing a ridge roof vent costs $2 to $3 per linear foot or $300 and $650 on average.

Cost to vent a bathroom fan through the wall

Venting a bathroom fan through the wall costs $250 to $800 on average for new installation. Pricing depends on the distance from the bathroom to the outside wall, existing electrical wiring, fan type, and exterior siding material.

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Cost to replace a bathroom fan

Bathroom fan replacement costs $150 to $550 total on average. Homeowners should replace bathroom vent fans every 10 years.

  • Fan and vent installers charge $50 to $100 per hour for labor, and replacement takes 2 to 3 hours.
  • Wiring a new switch costs $100 to $250 more.
Bathroom fan replacement cost
Item Average cost
New fan $50 – $150
Replacement labor $100 – $400
Total replacement cost $150 – $550
For no-cut installation, choose a new ceiling fan with the same dimensions as the old fan.

High-end, smart bathroom fan installed with light and sensors
High-end, smart bathroom fan installed with light and sensors

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DIY costs to replace a bathroom extractor fan

Replacing a bathroom exhaust fan yourself costs $20 to $400 for the new fan and takes 2 to 3 hours. Select a fan that matches the existing air duct's size for the least complicated installation.

Installing a completely new bathroom fan is not a DIY project. It requires professional experience, tools, ductwork, electrical wiring, cutting through the walls or ceiling, and sometimes cutting through the roof.

Working with electricity can be dangerous. For your safety, hire a licensed electrician or handyman.

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Frequently asked questions

What are bathroom fans for?

Bathroom fans pull moisture from the air. Reduced humidity levels prevent moisture damage, paint and wallpaper peeling, and mold and mildew growth. Fresh air from bathroom fans also removes odors. In addition, the drier air keeps mirrors from fogging, windows and doors from warping, and fixtures from rusting.

Most building codes require bathrooms to have ventilation from a ceiling fan or window.

Do I need a permit to install a bathroom fan?

A permit is typically required when installing a bathroom fan for the first time. Bathroom fan installations involving electrical, duct, and roof work may require multiple permits. Permits cost $30 to $500 for wiring and ductwork and $70 to $250 for roofing modifications.

Do bathroom exhaust fans need to be vented outside?

Bathroom exhaust fans require outside ventilation through a sidewall, roof, or behind a gable or soffit vent. Venting a bathroom fan into the attic, garage, or any space within the house causes moisture damage, wood rot, and mold problems.

The best bathroom exhaust vent location is the building side, away from any overhangs. Roof venting is also common but is more susceptible to leaks.

Do not use existing gable or soffit vents for bathroom exhaust. Instead, create separate vents at least 10 feet from the existing vents to prevent moist air from funneling back into the house.

Can a bathroom exhaust fan be mounted on the wall?

Many bathroom exhaust fans can be mounted on the wall. Check with the manufacturer if the fan does not specify wall mounting. Mount bathroom exhaust fans as close to the ceiling as possible because moist, hot air rises. Bathroom fans with lighting or heating functions should only be ceiling mounted.

How long does it take to install an exhaust fan?

Replacing an existing bathroom fan takes 2 to 3 hours on average. Installing a new exhaust fan takes 4 to 8 hours or more, depending on the ease of access and installation complexity.

Time it takes to install an exhaust fan
Installation type Time to install (hours)
Replacement 2 – 3
New installation 4 – 8

How much electricity does a bathroom fan use?

Standard bathroom exhaust fans use 50 watts or more, while energy-efficient models use as little as 5 watts. Bathroom fans running 2 hours per day use $0.50 to $5 of electricity per year. Electricity usage depends on the fan size, airflow (CFM), energy efficiency, and features.

Do bathroom fans remove smell?

Bathroom exhaust fans remove smells by drawing out the odorous air and replacing it with new air. Complete air replacement takes 8 minutes on average.

What size CFM bathroom fan do I need?

The Home Ventilating Institute guidelines recommend at least one cubic foot per minute (CFM) per square foot of floor space for bathroom fans. For bathrooms over 100 square feet, add:

  • 50 CFM per toilet
  • 50 CFM per shower, bath, and combination
  • 100 CFM per whirlpool

Continuous run fans require a lower CFM rating—a 20 CFM continuous fan is sufficient to replace a 50 CFM non-continuous exhaust fan.

How much does kitchen exhaust fan installation cost?

Installing a kitchen exhaust fan costs $450 to $900 on average. The cost depends on the fan type, features, and if new wiring and ductwork are needed.

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Who to hire to vent and install a bathroom exhaust fan?

Hire an electrician or handyman to install a bathroom exhaust fan. If there is no current bathroom exhaust fan, hire a plumber or HVAC specialist with expertise to install new ductwork and vents.

Before hiring a pro, remember to:

  • Get at least three estimates to compare.
  • Look for licensed handymen, electricians, or HVAC professionals.
  • Browse their reviews on HomeGuide, Google, and the Better Business Bureau (BBB).
  • Select companies that are insured, bonded, and have been in business for more than five years.
  • Avoid selecting the lowest quote as quality may suffer.
  • Get a detailed estimate, contract, and warranty in writing before the work begins.
  • Never pay in full before the project starts. Pay instead for work completed.

Questions to ask bath fan installers

  • How long have you been in business?
  • Are you licensed, bonded, and insured?
  • Is the fan price included in the installation fee?
  • What is and is not included in the installation fee?
  • Will you install a fan I purchase separately?
  • What additional costs should I expect?
  • Which method of outside venting do you recommend for my bathroom fan and why?
  • How long will the installation take?
  • Is a warranty included, and if so, what does it cover?
  • What do you charge for repairs?
  • Will the fan require any ongoing maintenance?
  • How long should I run the fan for after a shower?

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