What is a cesspool and how does it work?

A cesspool is a wastewater system that disposes of untreated sewage directly into the ground without filtration or treatment.

Why does Hawai‘i want to eliminate cesspools?

Cesspools can affect groundwater and ocean health, so the state aims to reduce environmental impact over time.

What is the deadline for cesspool conversion in Hawai‘i?

All cesspools must be converted by 2050 under current Hawai‘i law.

How much does it cost to convert a cesspool in Kona?

Costs typically start around $30,000 but vary depending on site conditions and accessibility.

What is HB 1618 in 2026?

HB 1618 proposes financing support, including low-interest loans and possible forgiveness, to help homeowners convert cesspools.

Are cesspools still allowed when buying a home?

Yes, many homes still legally use cesspools, particularly single-family homes that are grandfathered.

Can multiple units share one cesspool?

No. This is considered a gang cesspool and is not permitted.

Will buyers avoid homes with cesspools?

Not necessarily. Most buyers proceed once they understand the system and future conversion requirements.

Is sewer connection required instead of septic?

Not always. In many areas of the Big Island, septic systems are the primary alternative due to limited sewer access.

Will the 2050 deadline change?

Implementation details may evolve, but the current mandate remains in place.

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Home » The latest Hawaii law, tax, zoning and rule changes

The latest Hawaii law, tax, zoning and rule changes

Hawaii Cesspool Law Update 2026: What HB 1618 Means for Big Island Homeowners and Buyers

By Kai Ioh and KE TEAM HawaiiKai Ioh is a luxury real estate advisor based in Kona, Hawai‘i, specializing in second home, resort, and ultra-high-net-worth markets across the Big Island. Key Takeaways Hawai‘i still has over 80,...

May 4, 2026

Understanding Hawaii County Property Tax Assessment Notice (2026)

By Kai Ioh and KE Team Hawaii. Kai Ioh is a luxury real estate advisor based in Kona, Hawai‘i, specializing in second home, resort, and ultra-high-net-worth markets across the Big Island. Key Takeaways This guide explains how to read and interpret your Hawaii County Real Property Assessment Notice. It is most relevant for property owners on […]

March 23, 2026

Hawaii County Real Property Tax Guide (2025) What Big Island Homeowners Need to Know Before August 20

By Kai Ioh and KE Team Hawaii. Kai Ioh is a luxury real estate advisor based in Kona, Hawai‘i, specializing in resort and ultra-high-net-worth markets across the Big Island. Key Takeaways August 20 is a required real property tax payment deadline for all Hawai‘i County property owners. Hawai‘i County property taxes are administered at the county […]

January 7, 2026

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Main Content

The latest Hawaii law, tax, zoning and rule changes

Hawaii Cesspool Law Update 2026: What HB 1618 Means for Big Island Homeowners and Buyers

Understanding Hawaii County Property Tax Assessment Notice (2026)

Hawaii County Real Property Tax Guide (2025) What Big Island Homeowners Need to Know Before August 20

Big Island ADU Laws 2024: What Hawaiʻi County and State Rules Now Allow

Hawai‘i County Long-Term Rental Tax Class Explained: What Big Island Property Owners Need to Know

Maui’s Bill 9 Explained: What Hawaii’s New Vacation Rental Law Means for the Big Island and Beyond

New Big Island STVR Law (Bill 47): What Homeowners Need to Know

Hawaii Insurance Crisis: September 2025 Update

Hawaii Condo Insurance Crisis: New Law Brings Relief—But Not a Miracle Cure

What NAR’s Clear Cooperation Policy Changes Mean for Big Island Home Sellers