Garbage disposal units typically cost between $150 and $500 for the unit itself, plus $150 to $300 for professional installation
The total price depends on the motor size, brand, and whether you hire a plumber or install it yourself. A basic half-horsepower model from a hardware store runs $150 to $250. Mid-range units with three-quarter or one-horsepower motors cost $250 to $400. Heavy-duty commercial-grade disposals can exceed $500. Installation labor varies by region and plumber rates, but expect to pay $150 to $300 if you call a professional.
If you already have a disposal and need to replace it, removal of the old unit adds $50 to $100 to the labor cost. If your sink has never had a disposal, the plumber may need to modify the drain line, which can add another $100 to $200.
Key Takeaways
- A new garbage disposal unit costs $150 to $500 depending on motor size and brand, with basic models at the lower end and heavy-duty units at the higher end.
- Professional installation typically runs $150 to $300, and removal of an old disposal adds $50 to $100 to that cost.
- If your sink has never had a disposal, drain line modifications may add $100 to $200 to the installation bill.
- You can save the installation cost by doing the work yourself if you have basic plumbing skills, but mistakes can lead to leaks or damage to the drain system.
- Prices vary by region, plumber, and whether you need additional work like electrical outlet installation or drain modifications.
Motor size and brand affect the price most
The motor determines how much food waste a disposal can handle and how long it lasts. A half-horsepower motor is the smallest standard size and works for a household that doesn't grind heavy loads often. These units cost $150 to $250 and are sold by Insinkerator, Waste King, and store brands like Badger.
A three-quarter-horsepower motor handles more volume and tougher materials like bones and fibrous vegetables. Expect to pay $250 to $350 for this size. One-horsepower models, which are the most common for busy households, run $300 to $450. Insinkerator and Waste King dominate the market and tend to cost more than generic brands, but they often come with longer warranties and quieter operation.
If you grind a lot of food waste or have a large family, a one-horsepower unit will last longer and jam less often. The extra cost upfront usually pays for itself in fewer repairs and longer lifespan.
Installation labor varies by region and complexity
A plumber in a major city may charge $200 to $300 for a straightforward replacement of an existing disposal. In rural areas or smaller towns, the same job might cost $150 to $200. Some plumbers charge a flat rate for disposal installation; others charge hourly labor plus the cost of the unit.
If the old disposal is still in place, removal takes 15 to 30 minutes. If the sink has never had a disposal, the plumber needs to cut a hole in the drain line and install a T-fitting, which takes longer and costs more. Electrical work—running a new outlet or hardwiring the disposal—adds another $75 to $150 if the outlet doesn't already exist under the sink.
Call three plumbers in your area and ask for a quote that includes removal of the old unit (if any), installation of the new one, and any drain modifications. Most will give you a price over the phone once you tell them the motor size and whether you're replacing an existing disposal.
DIY installation can save money but carries real risks
If you have basic plumbing experience and the right tools, you can install a disposal yourself and save the $150 to $300 labor cost. The job involves disconnecting the old disposal (if present), installing a new mounting ring and rubber gasket, and connecting the drain line and electrical cord. Most units come with instructions and a wrench for the mounting ring.
The main risks are cross-threading the mounting ring (which cracks the sink), failing to seal the gasket properly (which causes leaks under the sink), or damaging the drain line. If you make a mistake, you'll need to call a plumber anyway, which defeats the savings. If you're not confident with plumbing connections or don't have a wrench and screwdrivers, hire a professional.
Electrical safety is another consideration. If the disposal needs to be hardwired to a circuit breaker rather than plugged into an outlet, you should hire a licensed electrician. Improper wiring can create a shock or fire hazard.
Budget for replacement parts and repairs over time
A garbage disposal typically lasts 8 to 15 years with normal use. Toward the end of its life, you may need to replace the rubber gasket (around $20 to $40) or clear a jam that requires a plumber visit ($100 to $150). If the motor burns out, replacement is usually cheaper than repair—you remove the old unit and install a new one rather than rebuilding the motor.
Stainless steel baffles and grinding rings wear down over time and cannot be replaced separately; you have to replace the entire unit. This is why a mid-range unit with a longer warranty can be a better value than the cheapest option. A five-year warranty covers parts and sometimes labor, which protects you if the motor fails early.
Comparing new installation to replacement costs
If you're installing a disposal for the first time, expect to pay more than if you're replacing an existing one. A new installation includes drain line work, possible electrical outlet installation, and the mounting hardware. A replacement straightforward removes the old unit and installs the new one in the same space.
| Scenario | Unit Cost | Labor Cost | Total Range |
|---|---|---|---|
| Replace existing disposal | $150–$500 | $150–$250 | $300–$750 |
| New installation (no existing disposal) | $150–$500 | $200–$350 | $350–$850 |
| DIY replacement (existing disposal) | $150–$500 | $0 | $150–$500 |
If you're replacing a disposal that's already installed, you save the drain line work and electrical modifications. If you're adding a disposal to a sink that never had one, budget for those extra steps. Ask the plumber to break down the quote into unit cost, labor, and any additional work so you know what you're paying for.
Where to buy and how to compare prices
Home Depot, Lowe's, and Ace Hardware carry disposals in stock and online. Prices are similar across retailers, though sales and promotions vary. Insinkerator and Waste King are the most widely available brands. You can also order from Amazon or Walmart, but you'll still need to hire a plumber for installation unless you do it yourself.
When comparing units, look at the horsepower, warranty length, and noise level. A quieter disposal (measured in decibels) costs more but is worth it if your kitchen is open to a living area. Read customer reviews on the retailer's website to see how long people report their units lasting and whether they jam frequently.
If you're buying the unit and hiring a plumber separately, the plumber may have a preferred brand or be able to source a unit at a discount. Ask whether they can supply the disposal as part of the installation quote, which sometimes saves money compared to buying it yourself and having them install it.
Frequently Asked Questions
Can I install a garbage disposal myself if I've never done plumbing before?
You can if the sink already has a disposal and you're comfortable with basic hand tools. Replacing an existing disposal is simpler than a new installation. If you're adding a disposal to a sink that never had one, or if you're unsure about sealing drain connections, hire a plumber. A leak under the sink can damage cabinets and cost more to fix than the installation labor.
What's the difference between a half-horsepower and one-horsepower disposal?
A half-horsepower motor grinds softer food waste and takes longer with tougher materials. A one-horsepower motor handles bones, fibrous vegetables, and larger volumes faster and with less jamming. If you have a large household or grind a lot of waste, the extra cost of a one-horsepower unit pays for itself in fewer repairs and longer lifespan.
Do I need an electrician to install a garbage disposal?
Only if the disposal needs to be hardwired to a circuit breaker. If there's already an outlet under the sink, the plumber can plug it in. If you need a new outlet or hardwiring, hire a licensed electrician. Improper electrical work is a safety hazard.
How long does a garbage disposal last?
Most disposals last 8 to 15 years with normal use. The lifespan depends on the motor size, brand, and how much you use it. A mid-range unit with a longer warranty often outlasts a cheap unit and costs less over time when you factor in repairs.
What should I ask a plumber when getting a quote?
Ask whether the quote includes removal of the old disposal, installation of the new unit, and any drain line modifications. Ask if they supply the disposal or if you need to buy it separately. Ask about the warranty and whether they offer a service call if the disposal jams or leaks within the first year.