Dishwasher Installation Cost in 2026: $110-$350

A like-for-like replacement using existing rough-in connections is the cheapest scenario - labor runs $110-$180 with minimal materials. First-time installation is the most expensive because it requires new rough-in work: a licensed plumber must tap into the hot water supply line, add a drain air gap, and a licensed electrician must run a dedicated circuit. Combined trades can push the total to $400-$600 before the appliance itself, and some jurisdictions require permits for new rough-in work.

If the existing supply line is galvanized, kinked, or the wrong size, it needs replacing before the new dishwasher is hooked up. A standard 3/8-inch braided stainless supply line costs $15-$30 in materials; labor to reroute or extend the drain hose to a disposal or basket strainer adds $50-$150. Adding or replacing the angle-stop shutoff valve under the sink costs $75-$150 for labor plus parts. Any of these extras turn a simple swap into a mid-range job.

Most dishwashers require a dedicated 120V/15A or 20A circuit. If one already exists at the dishwasher location (common in homes built after 1990), electrical work is limited to connecting to the junction box - typically $0-$50 in labor. If no dedicated circuit exists, a licensed electrician must run a new circuit from the panel: materials and labor run $150-$400 depending on panel distance and local rates. Some municipalities require this work to be permitted and inspected.

Many appliance retailers and installers charge a separate fee to haul away the old dishwasher. Big-box store add-on haul-away typically runs $30 for self-purchased appliances. Independent plumbers and handymen may charge $50-$75 if they need to transport the unit themselves. If you can wheel the old dishwasher to the curb or a recycling center yourself, you can skip this cost entirely.

Most standard 24-inch dishwashers install identically regardless of brand - Bosch, Whirlpool, LG, and GE use the same supply and drain connection standards. However, some European-style units require specific drain pump configurations or side-mount brackets instead of top-mount brackets, adding $25-$100 in labor time. Dishwashers with built-in food disposers (rare) or steam-clean features may also require additional electrical connections that increase install time.

“Does your quote include the supply line, drain hose, and mounting hardware, or are those extra?”

Why this matters: Big-box installation add-ons often include labor only and charge separately for parts. An independent plumber's quote may or may not include materials. Getting a clear answer upfront avoids a surprise $40-$80 parts surcharge on the invoice.

“Will you verify there's a working dedicated shutoff valve before starting, and is valve replacement included if it's corroded?”

Why this matters: A shutoff valve that hasn't been turned in 10+ years may leak or fail to close fully when the installer opens it. Replacing it mid-job typically costs $75-$150 extra and can delay the project by hours if parts aren't on the truck. Ask about this contingency before work starts.

“Is the electrical connection included, and do you have a licensed electrician if a new circuit is needed?”

Why this matters: Most plumbers will connect a dishwasher to an existing junction box, but they cannot legally run new electrical circuits in most states. If your kitchen has no dedicated dishwasher circuit, you need either a plumber-electrician combo or two separate contractors. Clarify this so you're not left with a half-installed dishwasher waiting on a separate electrician.

“Will you test the full wash cycle before you leave, and do you check for leaks under the unit?”

Why this matters: A competent installer should run at least a rinse or short wash cycle to confirm the supply, drain, and electrical connections are all working. They should also check under the dishwasher with a flashlight for supply line drips. An installer who refuses to test the cycle or 'just trusts it's fine' is not doing a complete job.

“Do I need a permit for this installation, and will you pull it if so?”

Why this matters: First-time installations requiring new electrical or plumbing rough-in commonly trigger permit requirements in cities and counties. An unlicensed or unpermitted installation can create liability issues when you sell your home. The contractor pulling the permit is also accepting responsibility for code compliance - if they refuse to discuss permits for new rough-in work, treat that as a red flag.