How much does garbage disposal installation cost?
Installing a garbage disposal typically costs $150–$450 in labor when replacing an existing unit. A first-time install needing an outlet, switch, and drain changes runs $400–$900+.
Ranges are typical planning guides — actual price varies by region, access, materials and your local pro. Always get a written quote.
| Scenario | Typical cost | Notes |
|---|---|---|
| Replace existing disposal | $150–$350 | Wiring & drain in place |
| First-time install | $400–$900 | New outlet, switch & drain |
| Add outlet / wall switch | +$120–$300 | Electrician may be needed |
| The disposal unit | $80–$400 | 1/3 to 1 HP, bought separately |
What affects the price
Replacement vs first install
Swapping a unit is quick since power and drain are set. A first install needs an outlet under the sink, a wall switch, and drain plumbing added.
Electrical work
A disposal needs a switched outlet under the sink. If there is none, an electrician must add one, which is a separate cost from the plumbing.
Unit horsepower
The disposal itself is $80–$400. Higher horsepower (3/4–1 HP) grinds better and jams less but costs more than a basic 1/3 HP unit.
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How much does garbage disposal installation cost?
About $150–$450 in labor to replace an existing disposal. A first-time install needing an outlet, switch, and drain work costs $400–$900+.
Do I need an electrician to install a garbage disposal?
Only if there is no switched outlet under the sink. A replacement usually just needs a plumber, but a new install may need an electrician too.
What size garbage disposal do I need?
A 1/2 HP unit suits most households. Choose 3/4–1 HP for larger families or heavy use to reduce jams and clogs.