Know the Plumber Cost to Replace a Garbage Disposal

Thinking about replacing your garbage disposal? Is your old unit making strange noises, clogging constantly, or just not grinding like it used to? You’re probably wondering about the plumber cost to replace garbage disposal​ and whether it’s worth the investment or not. 

To help you resolve this quandary, let’s break down everything you need to know about installing a garbage disposal and its installation costs.

What Is the Approximate Life Expectancy of a Garbage Disposal?

Most garbage disposals last between 10 to 12 years with proper care and maintenance. Now, your next question will be: what is the best maintenance for garbage disposal units?

Well, just ensure regular cleaning, avoiding non-food items, and not overloading the unit. These steps can help extend its lifespan. However, if your disposal is a decade old and showing signs of wear and tear—like frequent clogs, leaks, or the need to constantly hit the reset button—it’s probably time to replace the disposal unit.

Is It Worth Replacing a Garbage Disposal?

If your current disposal is old, underpowered, or malfunctioning, replacing it can save you from plumbing headaches and keep your kitchen running smoothly. Remember, upgrading your disposal unit is a smart move that pays off every time you do the dishes!

A new garbage disposal is likely to be more efficient, quieter, and safer, especially if you upgrade to a model with more horsepower (hp) or stainless steel components for durability. Plus, newer disposals are better at handling food scraps, which helps prevent sink clogs and keeps your kitchen cleaner.

How Long Does It Take a Professional to Install a Garbage Disposal?

A professional plumber typically takes two to four hours to install or replace a disposal unit. This includes removing the old unit, making the necessary plumbing adjustments (if any), and connecting the new disposal. Of course, if additional electrical wiring is required—such as installing a grounded outlet or a dedicated circuit—the process may take a bit longer and could require an electrician.

What Are the Total Installation Costs?

The average cost to replace a garbage disposal ranges from $200 to $625, with most homeowners paying around $550 for a professional installation. If you’re handy, you could DIY the project for as little as $80 (plus the cost of the new unit). However, hiring a pro ensures everything is up to code and safely installed.

Here’s a quick breakdown of the cost factors:

• Type of garbage disposal you choose: Continuous feed garbage disposals (which run as long as the switch is on) typically cost between $75 and $1,000, while batch feed models (which only run when the stopper is in place) range from $75 to $300.
• The horsepower (hp) required: More powerful motors (¾ hp or 1 hp) cost more. But these are better for larger households and tougher food scraps.
• The garbage disposal material: Stainless steel models are more durable and resistant to corrosion, but cost more than aluminum units.
• Labor cost: Professional installation averages $120–$150, but can be higher if electrical work or plumbing modifications are needed.
• Electrical wiring: If your kitchen doesn’t already have a grounded outlet or dedicated circuit, you’ll need to factor in the cost of hiring an electrician.

Types of Garbage Disposals: Batch Feed vs. Continuous Feed

Batch feed disposals offer an added layer of safety, as they only operate when the drain cover is in place. Therefore, they are great for families with kids. Continuous feed models, on the other hand, are more popular for their convenience, allowing you to add waste while the unit is running.

What Are the Electrical and Installation Considerations?

• Grounded outlet: Most disposals require a dedicated, grounded outlet on a GFCI breaker for safety.
• Electrical wiring: Larger units may need a 20-amp circuit; most run on 120V, 60 Hz systems.
• Professional installation: Ensures proper fit, leak prevention, and compliance with local codes.

Plumber Cost to Replace Garbage Disposal: Key Takeaway

When you’re ready to replace a garbage disposal, consider your household size, the type of waste you produce, and whether you want a batch feed or continuous feed model. Remember, professional installation is usually worth the investment for peace of mind and a job done right.

Written by Ramona Sinha. June 19, 2025

Ramona is the Senior Content Writer for Kukun. This experienced blogger uses simple and succinct words to decipher the complex phenomenon called life. She has written articles covering a broad range of topics, such as real estate, lending and mortgage, finance, business, taxation, home designs, home improvement projects, decor concepts, and more. An avid traveler, she’s a digital nomad at heart and an animal lover from the depth of her soul.