The cost of installing a garbage disposal depends on six things. They are the unit you choose, replacing versus adding, the electrical setup, the drain and dishwasher connections, how easy the cabinet is to work in, and removal of the old unit. A like-for-like swap is the simplest job. A first-time install that needs a new outlet or drain changes is the most involved.
We do not list dollar amounts here because they would be a guess without seeing your sink. The reliable way to get a number is to call a licensed plumber, describe what you have, and ask for a clear price before any work starts.
Which job is yours?
Most price differences begin with one question: is there a disposal under the sink now?
Replacing an existing disposal
- The flange, drain connection and power are already in place.
- The plumber removes the old unit, reuses or swaps the mounting parts, and connects the new one.
- Cost moves mainly with the new unit and any corroded parts found underneath.
- A seized or leaking old unit can take extra time to remove.
Installing a first disposal
- The sink may need a larger drain opening or a different flange.
- You need a power source, often a switched outlet or hardwired connection.
- The drain trap and dishwasher line may need rework.
- Cost moves with how much of that setup has to be built.
The six cost factors, and what moves each one
| Factor | What raises the price | What keeps it simpler |
|---|---|---|
| The unit | More motor power, quieter models, stainless parts, continuous or batch feed styles. | A standard model that matches the mounting already under the sink. |
| Electrical | No outlet under the sink, no wall switch, wiring that needs to be run or updated. | A working switched outlet and a plug-in cord. |
| Drain connections | Old trap, corroded tailpiece, a different sink drain size. | Existing pipes that line up with the new outlet. |
| Dishwasher hookup | Connecting a dishwasher drain for the first time or replacing a worn hose. | Dishwasher line already routed and in good shape. |
| Access and cabinet space. | Crowded cabinet, extra pipes, a double sink with a shared trap. | Open space and standard layout. |
| Removal and disposal. | Hauling away a heavy old unit, cleaning up leaks or debris. | Clean swap with a working old unit. |
What the plumber will want to know before quoting
You can speed things up and get a firmer price by gathering these details before you call.
- Whether there is a disposal now, and its brand if you can read it on the side.
- Whether you have a single or double sink, and whether the sink is stainless, composite or stone.
- Whether there is a switch on the wall or an outlet under the sink.
- Whether a dishwasher drains into the sink area.
- Photos of the cabinet with the doors open, showing the pipes.
- Whether you want a specific model or are open to the plumber's recommendation.
Want a plumber to look at it?
Call the 24/7 line, describe what you found and hear a clear price before work starts.
Does a bigger motor mean a better disposal?
Not always. A larger motor handles tougher scraps and tends to run quieter and last longer, but it also costs more and may be more than a small household needs. If you rarely send anything beyond soft scraps down the drain, a mid-range unit can be enough.
Think about habits before specs. A household that cooks often and scrapes plates into the sink every night benefits from a stronger unit. Everyone else can often put that money toward a good installation.
Typical visit, from start to finish
Look at the sink
The plumber checks the cabinet, the power source, the drain and the dishwasher line before giving a price.
Shut off power
Power to the disposal is switched off or unplugged before any work begins.
Remove the old unit
The old disposal is detached from the sink flange, the drain and, if present, the dishwasher hose.
Mount the new one
The new flange is set in the sink, the unit is hung from it, and the outlets are aligned with the drain.
Connect and test
Drain and dishwasher connections are made, then the plumber runs water and the disposal to check for leaks and noise.
When the cheapest option is repair, not installation
A disposal that hums but does not spin, or leaks at one seam, is sometimes fixable. A jam can often be cleared, and a loose connection can be tightened. A cracked housing or a rusted-through casing is not repairable.
If you are not sure which situation you have, ask a plumber doing garbage disposal repair to look first. They can tell you if the unit has life left before you pay for a new one.
Questions to ask before you say yes
Is the price complete?
Ask what is included: the unit, mounting, power cord, dishwasher connection and removal of the old one.
Who does the electrical work?
If a new outlet or switch is needed, ask whether the plumber handles it or recommends a licensed electrician.
What if there are surprises?
Ask how extra work found under the sink is handled and approved before it is done.
What does the warranty cover?
Ask what the manufacturer covers and what the plumber covers on labor, in writing.
Who supplies the unit?
Compare a plumber-supplied unit with one you buy yourself, including how installation of customer-supplied parts is handled.
Where installation fits in other plumbing work
If you are remodeling the kitchen, the disposal is one item among several, and bundling it with other work under plumbing installation can save time. The plumber is already under the sink for other connections. Tell them about the disposal before the visit so the right parts are on hand.
El Mirage conditions that affect your disposal
The city's 2024 water quality report lists hardness from 4 to 9 grains per gallon, with an average of 7. Mineral scale can build on the metal fittings and shutoff valves under the sink over the years. When the plumber opens the cabinet, expect them to check whether those parts are in good enough shape to reuse.
Census-based data puts the median El Mirage home at about 2004, and most homes date from the 2000s boom. A disposal installed when the house was built has likely served for a long time, so replacing it is common. Ask the plumber whether the sink flange and drain pieces should be replaced along with it.
For permit questions on kitchen work, ask the El Mirage building department. The city did not state a rule for disposals in the pages we reviewed, so do not assume one way or the other.
Frequently asked questions
It is possible for a like-for-like swap if you are comfortable with tools and electricity. The risks are leaks, a poorly seated flange and unsafe wiring. If power has to be added, hire a licensed professional.
Typically no. Insurance usually covers sudden and accidental damage, not wear and tear. Read your policy and ask your agent.
A straightforward swap is usually a short visit. A first install or a job with wiring and drain changes takes longer. Ask the plumber for a time window when you book rather than relying on a general answer.
Most standard kitchen sinks do, but some thin or specialty sinks need extra parts. A plumber can check the drain opening and the material before recommending a unit.
Hard water leaves scale on metal parts, so fittings and valves under the sink wear out sooner than in softer water. The city's 2024 report lists an average of 7 grains per gallon. The disposal motor itself depends more on how you use it, but the connections around it are where scale shows up first.
Question not answered here? Call (623) 301-9042
Sources and code notes
Code reference: El Mirage follows the 2018 International Plumbing Code (IPC) and the 2018 International Fuel Gas Code (IFGC). Ask the El Mirage building department which rules and permits apply to your job. Hardness figures come from the City of El Mirage 2024 water quality report.