By Benjamin Finnerty (S), REALTOR® (RS-83812) with Keller Williams Realty Maui · Kīhei, Maui · 808-481-9748

Quick Answer: Maui County Department of Water Supply rates for fiscal year 2027 took effect July 1, 2026, raising base monthly service charges about 5%. Most single-family homes will see only a 1–2% increase on typical usage. The steepest increases fall on high-volume users, while shared-meter condos and hotel/resort-classified properties are billed on separate flat rates.

I’m Benjamin Finnerty, a REALTOR® in Kīhei with Keller Williams Realty Maui, and I focus on the full cost of owning a home or condo here, not just the mortgage, property taxes, HOA dues and insurance. The water bill is one line item that changed this summer and rarely makes it into those spreadsheets. Depending on the property type, the new rates range from barely noticeable to worth building into your numbers.

When Did Maui’s New Water Rates Take Effect?

July 1, 2026, the start of Maui County’s fiscal year 2027. Base monthly service charges rose roughly 5% across the board. For a standard single-family home on a 5/8-inch meter, the most common residential size, the monthly service charge is now $30.25 before any water usage.

Department director John Stufflebean told local media the goal was to keep the impact on everyday households modest while asking the biggest water users to carry more of the cost. “While water rates are increasing, most residential customers will see only a modest change in their monthly bill — about 1 to 2 percent on average,” he said, noting that the tiered structure is meant to encourage conservation.

How Are Maui Water Rates Different by Property Type?

Maui bills water based on how a property is classified, and that is what matters when you compare properties:

Classification	How it’s billed (per 1,000 gallons)
Single-family homes	Tiered, from $2.13 in the lowest tier to $19.80 in the highest
Condos and multi-family on a shared master meter (three or more units)	Flat rate of about $5.09
Hotel and resort-classified properties	Flat rate of about $17.69
Agricultural users	Lower rates than residential customers

How Much Will a Single-Family Home’s Water Bill Go Up?

For typical use (showers, laundry, a modest garden), about 1–2%. Heavy users climb into the upper tiers quickly, where the per-gallon rate is many times higher. That threshold gets crossed fast on Upcountry properties with acreage, lawns or agricultural use, or anywhere with a pool and heavy landscaping.

How Are Maui Condos Billed for Water?

Condos on a shared master meter pay a flat rate of about $5.09 per 1,000 gallons, regardless of how much any one unit uses. For a typical condo owner, that flat structure is often more predictable, and can work out cheaper per gallon, than the tiered single-family schedule once usage is above the lowest tiers. It’s one more data point in the condo-versus-single-family cost comparison.

What Do Vacation Rental and Hotel-Classified Properties Pay for Water?

About $17.69 per 1,000 gallons, more than triple the multi-family rate. If you’re evaluating a condo that operates as a vacation rental or carries a hotel/resort water classification, that rate belongs in your cash-flow math from day one, because the gap can noticeably change projected net operating income on a short-term rental.

Why Did Maui Raise Water Rates?

The county says the increases are meant to close a roughly $2.6 million operating deficit in the water department while funding about $30 million a year in capital improvements, chiefly aging pipe replacement and new water source development. Maui’s water infrastructure, much of it decades old, has been a recurring topic at County Council budget hearings.

My Take: What I’m Telling Buyers About Water Costs

None of this is dramatic on its own. But it lands in a year that has already brought new property tax rates, rising HOA insurance costs in many associations, and tighter financing rules for condo buyers. Each is manageable. Stacked together, they can turn a “should be about this much a month” estimate into a real surprise at closing or six months in.

Water costs are predictable once you know a property’s classification and usage history. Before you write an offer, I’d ask the seller for a year of actual water bills rather than estimating from square footage or unit count. That matters most on larger Kula or Haiku lots, where irrigation drives usage, and on investment condos with a hotel/resort classification. If you’re looking at Upcountry land, also check the Upcountry water meter waitlist.

Frequently Asked Questions

Did water rates go up for everyone on Maui?

Base service charges rose about 5%, but the effect on your bill depends on usage and property classification. Most single-family households will see a small 1–2% change.

When did the new Maui water rates take effect?

July 1, 2026, the start of Maui County’s fiscal year 2027.

Are condo owners billed differently than single-family homeowners?

Yes. Condos on a shared master meter (three or more units) are billed a flat per-gallon rate rather than the tiered structure single-family homes use.

Does this affect vacation rental investment properties?

It can. Properties with a hotel or resort water classification pay a substantially higher per-gallon rate, which belongs in any short-term rental income projection.

Ask Benjamin

Whether it’s an Upcountry home, a condo for personal use or an investment property, I’m happy to put together a realistic, all-in monthly cost picture before you make an offer. I’m Benjamin Finnerty; call or text me at 808-481-9748 or email benjamin@the808team.com. It’s a quick conversation that can save a lot of budgeting headaches.