Portable Dishwasher Cost: Pricing and Hookup Guide (2026)
Portable dishwashers cost $400-900 and connect directly to your kitchen faucet with a quick-connect adapter. No permanent plumbing required. Setup takes about 10 minutes.
18" model
$400-600
24" full-size
$600-900
Installation cost
$0
How Portable Dishwashers Work
Portable dishwashers are full-size (or near full-size) dishwashers mounted on a cabinet with caster wheels. They roll from their storage location to the sink when needed. A quick-connect adapter attaches to the faucet aerator in seconds. The unit draws water during the wash cycle and drains via a hose that hangs over the sink edge.
Unlike countertop models, portable dishwashers have the capacity of a standard under-counter unit (8-12 place settings). They are a practical solution for kitchens without cabinet space for a built-in, or for renters who want the convenience of a full-size dishwasher without permanent installation.
Full Cost Breakdown
| Cost Item | Cost | Notes |
|---|---|---|
| Unit (18" compact) | $400-600 | GE, SPT, Danby brands common |
| Unit (24" full-size) | $600-900 | GE, Whirlpool portables |
| Quick-connect faucet adapter | $0-30 | Usually included; $15-30 if not |
| Standard hookup installation | $0 | You do it yourself in 10 minutes |
| Under-counter conversion (optional) | $100-300 | Plumber for permanent connections; check warranty first |
Top Portable Dishwasher Models (2026)
| Model | Width | Price | Place Settings |
|---|---|---|---|
| GE GPT145SSLSS | 18" | $550-650 | 8 |
| Whirlpool WDP540HAMZ | 24" | $700-850 | 12 |
| SPT SD-9240W | 18" | $450-550 | 6 |
| Danby DDW1801MWP | 18" | $480-580 | 8 |
Converting a Portable to Under-Counter
Check warranty before converting. Many manufacturers void the warranty if a portable is permanently installed. If the unit is still under warranty, use it as a portable until the warranty expires.
Conversion typically requires a plumber to add a proper water supply connection (T-fitting and shutoff valve, $100-200) and a permanent drain connection ($50-100). Total labor: $100-300. Hardware: $50-150. This gives you a permanent installation at a fraction of the cost of buying a new built-in dishwasher.
Portable vs Countertop vs Built-In
| Feature | Portable | Countertop | Built-In |
|---|---|---|---|
| Price (unit) | $400-900 | $200-500 | $300-1,800 |
| Installation cost | $0 | $0 | $150-300+ |
| Capacity | 8-12 place settings | 4-6 place settings | 12-16 place settings |
| Requires counter space | No (rolls to sink) | Yes | No (built-in) |
| Good for renters | Yes | Yes | No |
Related Guides
FAQ
How much does a portable dishwasher cost?
Portable dishwashers cost $400-600 for compact 18-inch models and $600-900 for full 24-inch wide models. The quick-connect faucet adapter needed to hook it up is usually included. There is no installation cost for standard faucet hookup - you do it yourself in about 10 minutes. If you later want to convert it to permanent under-counter installation, a plumber charges $100-300 for the conversion.
How do portable dishwashers connect?
Portable dishwashers roll to the sink on casters and attach to the kitchen faucet via a quick-connect adapter that threads onto the faucet aerator. They draw water directly from the faucet during the wash cycle and drain via a hose that hangs over the edge of the sink. When the cycle finishes, you disconnect the adapter and the faucet returns to normal use. Roll the unit back to its storage location.
Can I convert a portable dishwasher to built-in?
Yes. A plumber can convert most portable dishwashers to permanently installed under-counter units by adding proper water supply connections (T-fitting, shutoff valve) and a permanent drain tap. Conversion costs $100-300 in labor plus $50-150 in hardware. However, converting a portable to permanent may void the manufacturer warranty. Check your warranty before proceeding and wait until it expires if still covered.