DIY or hire · Decision
Should you install your own dishwasher?
By Ken Hoven · Updated April 2026
Our verdict
Maybe DIY
Mechanical work is easy. The plumbing and electrical connections are more involved than average.
- Risk
- Low risk
- Permit
- Usually not required
- Time
- 3 hr (DIY)
- Savings
- ~$300
The reasoning
A dishwasher install is fundamentally three connections: hot water supply, a drain hose looped up to the sink, and a power connection (either plug-in or hardwired). Each is simple in isolation. The work is fiddly mostly because it happens in a cabinet-sized space, lying on your back, with 40 lbs of appliance you're trying not to scratch. If you're comfortable with the three jobs individually — tightening a supply line, looping a drain hose, making a wire nut connection — it's a reasonable DIY. If you've never done any of them, it's a long afternoon of YouTube and three trips to Home Depot. The big gotcha is local code on the air gap: some municipalities require it, others don't. Check before you buy.
Honest cost comparison
| DIY | Hired | |
|---|---|---|
| Typical cost | $400–$900 | $700–$1,400 |
| What's included | Unit cost $350–$800 + hookup supplies $30–$80 | Includes install labor $150–$400 and haul-away of old unit |
If you DIY
Turn off the circuit and the hot-water supply under the sink. Disconnect the old unit's water, drain, and power, then slide it out (it'll drip — have a bucket). Slide the new unit in partway. Connect the hot-water supply to the inlet valve (a braided steel line with a 90° elbow is standard), run the drain hose up to the sink with a high loop or air-gap fitting per local code, and make the power connection. Level the unit — this matters a lot for door alignment and drainage. Push it fully into the cabinet, secure it to the underside of the counter, restore power and water, run a test cycle.
Tools needed
- adjustable wrench
- screwdriver
- level
- pliers
- flashlight
- bucket
If you hire it out
A plumber or appliance installer quote of $150–$400 for the install itself (not including the unit) is fair. $500+ needs justification. Ask specifically whether they'll include an air gap if required, and whether haul-away of the old unit is included. Both should be yes without extra charge.
Permit & code
Typically not required for like-for-like replacement.
Frequently asked
- Do I need an air gap?
- Required in California and some other jurisdictions. Elsewhere a high drain loop is often acceptable. Your local plumbing code is the authoritative source.
- Can I convert from hardwired to plug-in?
- Yes — most dishwashers come with a plug-in kit, or you can buy one. But the outlet has to be a dedicated circuit and accessible.
- What if there's no existing dishwasher and I'm adding one?
- Then it's a much bigger job — you may need a new branch circuit, supply line tee, and drain connection. Hire a pro.
- How do I level it?
- Adjustable feet at the base. Level front-to-back and side-to-side. If the kitchen floor slopes, level the unit itself — not relative to the floor.
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