A licensed plumber is usually the best professional for this job. If your kitchen isn’t wired for a garbage disposal, however, installation may also require an electrician. A handyman with plumbing and electrical experience may also be able to handle a simple replacement.

Apart from checking online reviews, here’s how to find the right professionals for the job:

• Ask for pricing estimates from a few different professionals and compare costs.

• Check which pros offer warranties on their work in case there are any leaks or issues after installation.

• Verify whether a licensed plumber, electrician, handyman or an apprentice will be installing the unit.

The national average cost for garbage disposal installation or replacement ranges from approximately $140 to $285,* according to Thumbtack data.

The total price will depend on the garbage disposal unit you choose (units typically cost anywhere from $50 to $500), as well as the existing setup in your kitchen. If your kitchen doesn’t have the plumbing or electrical wiring necessary for a garbage disposal, the labor cost for the installation will be higher.

*Data on file at Thumbtack. For a personalized cost estimate, request a quote from a professional.

If your kitchen is already set up for a garbage disposal (with the proper electrical wiring and plumbing), installing the unit typically involves the following:

• Disconnecting the power by switching off the circuit breaker

• Removing the old disposal unit (if applicable)

• Installing a new drain flange

• Mounting the new garbage disposal

• Connecting the disposal’s discharge tube to your plumbing

• Running the dishwasher’s discharge hose into the disposal (if you have a dishwasher)

• Connecting your disposal to the power supply

In most cases, a licensed plumber can replace a garbage disposal in one or two hours. However, expect the process to take longer if you don’t have the necessary wiring and plumbing fixtures. Installing new electrical and plumbing connections can take a professional as long as five hours.

Other factors affecting how long it takes to replace a garbage disposal include:

• Type and size of the unit being installed

• The time it takes to remove the old unit

• Any pre-existing issues with your sink or drain

Reach out to a plumber in your area to learn more about professional garbage disposal installation near you.

Remember: The timeline for your project will vary depending on many factors. Always ask your pro to provide an estimate.

Installing a garbage disposal can be a DIY-friendly project if you’re replacing a similar unit and have some plumbing experience. However, it’s usually best to hire a plumber, especially if your kitchen doesn’t already have the plumbing or electrical connections to accommodate a garbage disposal.

Attempting to adjust the plumbing or wire a new electrical connection typically requires expert knowledge and experience. If you install the unit yourself, you’re responsible for any damage that may result from leaks or improper wiring. 

Hiring a professional also ensures that your garbage disposal complies with local plumbing codes. Plus, some plumbers offer warranties for their workmanship, which can help give you peace of mind.

A common question for some first-time homeowners is, “Should I get a garbage disposal?” In most cases, the answer is yes.

Garbage disposal installation is a relatively low-cost project that offer two big advantages:

• Convenience: A garbage disposal can save you precious time when washing dishes and getting rid of waste. 

• Home improvement: Garbage disposals are a desirable feature for potential homebuyers. They're not just a "nice to have" — they're a "need to have."

However, while they offer many benefits, some cities have restrictions on garbage disposals. They can also be hard on septic systems. 

Your garbage disposal should last around 11 years but can burn out sooner with overuse. Watch out for these indicators that you should replace your garbage disposal:

• Unusual sounds: Grinding, humming or squealing noises could indicate a bad motor.

• Foul odors: A bad smell is a sign that food waste is building up in your disposal, indicating it isn’t working properly.

• Clogging and slow draining: If the disposal clogs frequently, it’s probably nearing the end of its life.

• Leaks: A leaking disposal likely has a cracked part or a damaged pipe and will need to be replaced.

If your motor has issues, replacing it is usually nearly as expensive as replacing the whole disposal. If you’ve noticed any issues with your disposal, you may want to contact a plumber.