Dishwasher Installation Cost: Swaps, Hookups & First Installs
Swapping a dishwasher into an existing opening runs $150 – $500 in labor. A first-time install, where a cabinet has to be cut down and a water supply, drain and outlet brought over, runs $450 – $1,200. Here is the difference between the two, and what a retailer "install included" deal really covers.
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| Job | Labor range | What it covers |
|---|---|---|
| Swap-out (existing connections) | $150 – $500 | Pull old unit, set new one, reconnect water, drain, power |
| First-time install | $450 – $1,200 | Cabinet mod, supply tee, new drain, dedicated outlet |
| Swap with a hardwire-to-cord change | $200 – $550 | New units often need a cord or junction box update |
| Install with air gap (where required) | $250 – $600 | Countertop air gap fitting and drilling in some states |
| Item | Range | When it applies |
|---|---|---|
| Haul-away of old dishwasher | $25 – $75 | Often bundled, worth confirming up front |
| New supply line and shutoff | $40 – $150 | Braided line plus an angle stop under the sink |
| Air gap fitting | $50 – $150 | Required by code in several states |
| Dedicated outlet or circuit | $150 – $400 | First-time installs with no power at the cabinet |
| Cabinet cutdown or filler | $75 – $300 | Opening too narrow or too short for a standard 24-inch unit |
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Swap-out vs first-time install
A swap-out is the common job: an opening already exists, the water supply tees off the sink hot line, the drain hooks to the disposal or sink tailpiece, and there is power at the cabinet. The installer pulls the old unit, levels and secures the new one, reconnects all three, and runs a test cycle to check for leaks. Labor runs $150 – $500, usually a single trip under two hours.
A first-time install is a full rough-in. A cabinet has to be cut down to a 24-inch opening, a supply tee added under the sink, a drain connection created at the disposal or sink, and a dedicated outlet run if none exists. That is the $450 – $1,200 range, and it often brings an electrician for the circuit. If the new opening borders a sink that is also being replaced, bundling it with your sink installation saves a second visit. Any time a plumber is already running new supply and drain lines, it is worth pricing nearby appliance work such as a washer and dryer hookup on the same visit.
High loop vs air gap, and why your state matters
The drain hose has to rise high before it falls, or dirty sink water can siphon back into the dishwasher. Two methods do this. A high loop straps the drain hose up under the countertop, then down to the disposal or drain: simple, no extra parts, and accepted in most of the country.
An air gap is a small chrome fitting that pokes up through the countertop or sink deck. Several states and many local codes require it instead of a high loop, because it physically breaks the connection rather than relying on a loop holding its height. If your area mandates an air gap, the installer drills the counter and fits it, adding $50 – $150 to the job. Ask which your jurisdiction requires before scheduling.
What "install included" actually covers
Retailer "install included" offers usually cover a basic swap into an existing, code-ready opening: reconnecting the supply, drain and power that are already there. They typically exclude an air gap if your code needs one, a new shutoff valve, a hardwire-to-cord conversion, cabinet modifications, and any electrical work. Those become add-ons or, often, a reason the crew declines the job on arrival.
A licensed installer prices the whole picture: they confirm the shutoff actually closes, replace a brittle supply line, add the air gap where required, and verify the drain and power meet code. The gap between a $0 store install and a $300 plumber install is usually the parts and code items the store offer leaves out. For a clean swap, the store route is fine; for anything with a question mark, the plumber is the call.
What moves the price
Opening size is the first variable. Older kitchens were built around dishwashers that no longer match a standard 24-inch unit, so a cutdown or a filler panel ($75 – $300) gets the new one to fit. Flooring laid after the original install can also raise the floor and trap the old unit, adding labor to work it loose.
The supply and drain are next. A missing or seized shutoff valve gets replaced ($40 – $150), and a new braided supply line is cheap insurance against the burst that ruins a floor. On the electrical side, newer dishwashers often ship without a cord, so a cord kit or junction box update is common. Haul-away of the old unit ($25 – $75) is usually bundled but worth confirming.
What the visit looks like
A swap is a same-day, single-trip job in most markets. The installer shuts the water and power, disconnects and slides out the old unit, sets and levels the new one, connects the supply, drain (with the high loop or air gap your code requires) and power, then runs a full cycle while watching for leaks at every joint. You are done inside two hours.
A first-time install runs longer and may need two trades. Expect a written price before work begins and a confirmation of who handles cabinet and electrical work. If your old dishwasher quit by backing up rather than dying, our guide to a dishwasher that will not drain can tell you whether a clog, not the machine, is the real problem.
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