Cost to Replace a Garbage Disposal

It costs $200 to $650 to replace a garbage disposal. Most homeowners pay $250 to $450 for a standard swap. The unit is $80 to $350. The rest is labor and small parts. A disposal with no power or a leaking sink flange pushes the total higher.

A disposal that hums but will not spin, leaks from the bottom, or smells no matter what you do is near the end of its life. Before you buy, it helps to know what the swap costs and when a cheap fix is enough. This guide covers both.

What It Costs to Replace a Garbage Disposal

A like-for-like swap costs $200 to $450. The plumber removes the old unit, reuses the mounting ring if it is in good shape, and fits the new disposal. The job takes about an hour.

A full install in a kitchen with no disposal costs $350 to $650. That adds a new drain fitting and an electrical connection. If the sink needs new plumbing, the total can climb higher.

The table below shows typical ranges. The sections after it explain what to look at when you pick a unit.

Horsepower and Feed Type

Horsepower sets the price. A 1/3 horsepower unit costs $80 to $140. It is fine for a small household. A 1/2 horsepower unit is $120 to $200 and suits most families.

A 3/4 or 1 horsepower unit costs $200 to $350. It grinds harder food, runs quieter, and lasts longer. It is a good choice for a busy kitchen.

Feed type matters too. A continuous-feed disposal runs while you push scraps in. A batch-feed unit runs only with the lid on. Batch-feed is safer around small children and costs $100 more.

Signs You Need a New Disposal

A humming motor with no grinding means a jam or a dead motor. Try the reset button and the hex key under the unit first. If it still will not turn, it is likely done.

Water under the sink is the next clue. A leak from the bottom of the unit means a failed seal. That is not fixable. A leak at the top or the drain pipe is often a loose connection and costs little to fix.

Age matters. Most units last 8 to 12 years. If yours is older and acting up, replace it. Do not pour money into repairs on an old disposal.

Where the Money Goes

The disposal is $80 to $350 for most homes. A new power cord kit is $10 to $25. Plumber labor is $100 to $250.

A new electrical outlet under the sink, if none exists, adds $150 to $350. A new sink flange or drain line repair adds $50 to $200.

A dishwasher hookup is often tied to the disposal. A new drain connection for a dishwasher costs $20 to $60 in parts. If the dishwasher is being swapped too, tell your plumber.

DIY or Hire a Plumber?

Swapping a disposal is one of the easier plumbing jobs. If the mounting ring is the same, you unplug the old unit, twist it off, and lock the new one in. Most DIYers finish in an hour or two.

Hire a pro if there is no outlet, if the sink drain is corroded, or if the wiring is hardwired and you are not comfortable with it. A mistake with the power can be dangerous. Wiring a new outlet is a job for an electrician, and our dedicated circuit guide shows what that costs.

Repair or Replace?

A jam is not a reason to replace. Many jams clear with the hex key or the reset button. A clogged drain line is a drain problem, not a disposal problem.

A leak from a gasket or a flange is cheap to fix. A dead motor or a rusted housing is not. As a rule, replace the unit if the repair would cost more than half of a new one.

Plan the Whole Sink Area

The sink area is often worth a bigger look. A leaky faucet or a rusty shutoff valve under the sink can be replaced in the same visit. If the pipe running to the wall is old, ask the plumber to check it.

If you are planning a kitchen update, a new disposal fits well with other work. See our guides on moving a kitchen sink, installing a pot filler, and replacing countertops. A new countertop is the best time to swap the sink and disposal together.

A shut-off valve on the supply line is also worth checking. Our guide to a main shut-off valve shows what that work costs.

How to Keep the Cost Down

Buy the unit yourself if you plan a DIY swap. Big-box stores sell good models from $100. If you hire a plumber, ask whether the quote includes the unit and the haul-away of the old one.

Get two quotes. A disposal swap is a small job, but trip charges vary a lot. Some plumbers price it as a flat fee, which is easier to compare.

The EPA guide to reducing wasted food notes that composting is a good alternative for some scraps. Less food in the disposal means a longer life for the unit.

Choosing the Right Model

Start with the mounting system. Most modern disposals use a quick-lock mount that fits any standard sink drain. Older ones use a three-bolt mount. A plumber can adapt either.

Look at the grind chamber and the motor. Stainless steel parts resist rust better than coated steel. A larger motor jams less and runs more quietly.

Check the noise rating and the warranty. A premium unit often comes with a seven-year or longer warranty. A cheap unit may carry only a one-year warranty, and that can cost you more in the long run.

Care Tips That Add Years

Run cold water before, during, and after you use the disposal. Cold water keeps grease firm so it can be ground and flushed away. Hot water melts grease, and it then coats the pipes.

Do not grind bones, corn husks, coffee grounds, or fibrous scraps in large amounts. They can jam the blades or clog the drain. Cut large scraps into small pieces first.

Clean the unit once a month. Grind a handful of ice and a few lemon peels to freshen it. Avoid harsh drain cleaners, which can damage the seals and rubber parts.

What to Expect on Install Day

The plumber clears the area under the sink and turns off the power. They disconnect the drain, remove the old unit, and clean the sink flange. A new mount goes on with plumbers putty or a gasket.

Next the new disposal is locked into place. The drain pipe and the dishwasher line are reconnected. A knockout plug in the dishwasher inlet must be removed, or the dishwasher will not drain.

The last step is a test. The plumber runs water, checks every joint for leaks, and runs the unit. The job is done when the sink drains freely and nothing drips.

When a Plumber Is Worth the Fee

If the sink drain is old or the shut-off valves are stuck, call a pro. A swap can turn into a leak if the old pipes crack. A plumber also knows the code for the drain and the air gap.

The extra fee is often $100 to $200. It buys a tested job and a warranty on the work.

Bottom Line

Budget $200 to $450 for a standard garbage disposal swap and up to $650 for a new install or added electrical work. A 1/2 horsepower unit suits most homes.

If your disposal leaks from the bottom or will not run at all, replace it. It is a small job with a big payoff.