State guide
Hawaii
Hawaii is county-driven on sewer laterals, and the ownership split varies by county. Honolulu's code makes the owner maintain to the property line, Maui places structural responsibility on the county from the property line to the main, and Hawaii County's public pages emphasize owner-paid connection work, permits, and inspections.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
Try a ZIP like 30303, “Travis County” or “Columbus, OH”
- Who usually owns the sewer lateral
- Responsibility varies by county: Honolulu puts owner responsibility to the property line, Maui puts county structural responsibility from the property line to the main, and Hawaii County's public guidance emphasizes owner-paid connection work and permits.
- State agency
- County wastewater/sewer departments and county permitting offices handle most lateral rules, with Hawaii DOH Wastewater Branch rules governing broader wastewater requirements.
- Permits for repair or replacement
- Honolulu requires a sewer connection permit, Maui directs owners to WWRD and the Plumbing Permit & Inspection Office and requires inspection before backfilling, and Hawaii County requires a Wastewater Division work permit plus inspection notice.
- Inspection at sale
- Honolulu says that in certain improvement-district connections, a deferred lateral installation charge becomes immediately due if the property is sold or transferred before the 25-year deferral ends.
- Assistance programs
- Official help found includes Hawaiʻi County's Home Improvement Loan Program for hook-up to County sewer lines and Hawaiʻi County's hardship exemption process for some single-family owners.
Official resources in Hawaii
City and County of Honolulu, ROH § 43-1.5 Use of public sewers
Official Honolulu sewer code requiring a permit to connect and making the owner responsible for the lateral to the edge of the property line.
Honolulu Department of Planning and Permitting: Site Development Permits
Official permitting page with the Wastewater Branch contact for sewer connection applications and right-of-way reviews.
Maui County WWRD Permitting FAQ
Official county FAQ explaining cleanout, permit, inspection, and lateral-installation review requirements.
Hawaii County Wastewater FAQ
Official county FAQ on required sewer connections, owner-paid connection expenses, permits, inspections, and hardship exemptions.
Hawaii County Home Improvement Loan Program (HILP)
Official county loan program page that lists hook-up to County sewer lines as an eligible use.
Key facts for Hawaii
- Honolulu requires a permit before any connection or reconnection to a public sewer.
- Honolulu makes the property owner maintain the sewer lateral to the edge of the property line.
- Maui's official ordinance materials say the owner is structurally responsible to the property line, and the department is responsible from the property line to the main line.
- Maui says sewer work must be inspected by County personnel before backfilling.
- Hawaii County says all connection expenses are the property owner's responsibility and a Wastewater Division permit is required for the work.
- Hawaii County says the Director may grant a hardship exemption from connection requirements for single-family dwellings in special or unusual circumstances.
City sewer lateral rules and programs in Hawaii
| City | city | phone | Details |
|---|---|---|---|
| Honolulu DPP Wastewater Branch Honolulu | Honolulu | (808) 768-8210 | Reviews sewer connection applications and projects in areas with sewers maintained or owned by the City and County of Honolulu. |
| Honolulu Site Development Division Honolulu | Honolulu | (808) 768-8100 | Handles site-development review for infrastructure construction and work in existing rights-of-way. |
| Maui County Wastewater Reclamation Division Administration office Maui | Wailuku | (808) 270-7417 | County front desk for sewer lateral location help, permitting guidance, and general wastewater administration questions. |
| Maui County DSA Plumbing Permit & Inspection Office Maui | Wailuku | (808) 270-7368 | County permit office listed for sewer lateral repair-work permit information. |
| Maui County Wastewater Collections Department Maui | Wailuku | Not published* | County contact if a plumber suspects a broken pipe between the property-line cleanout and the mainline or a mainline blockage. |
| Hawaiʻi County Wastewater Division Hawaii | Hilo | Not published* | County wastewater office for billing, sewer-connection questions, and work permits/inspections referenced in the wastewater FAQ. |
| Hawaiʻi County Wastewater Division Hawaii | Kailua-Kona | Not published* | West Hawaiʻi wastewater office listed on the Department of Environmental Management contact page. |
| Home Improvement Loan Program (HILP) Hawaii | Hilo | Not published* | County housing loan program that lists hook-up to County sewer lines as an eligible use. |
* Not published: the official page doesn't list it. Call the office to confirm before you rely on it.
What to do next
- In Hawaii, verify which county serves the property before assuming who owns the in-street segment; county rules differ.
- Before digging, call the county wastewater office and the plumbing-permit office to confirm whether the work needs both sewer and plumbing approvals.
- If you are on Hawaiʻi Island and cost is the barrier, ask about hardship exemptions and the Home Improvement Loan Program.
Not seeing your city or county?
We list a city only when an official government page publishes its rules. If yours isn't in the table above, it may not publish them online yet. Here's what to use instead, in order:
- General Start with the statewide information above. It applies across Hawaii, but cities and counties can add their own steps, fees or deadlines.
- Closest verified Nearest places where we have verified local data outside this state (distance from Hawaii's population center, for comparison only):
- City of Berkeley Private Sewer Lateral Program, California · about 2401 miles
- City of Berkeley Permit Service Center, California · about 2401 miles
- East Bay Municipal Utility District — Private Sewer Lateral Program, California · about 2403 miles
- Call to confirm Ask the official office. They have the current local rule, fee and form.City and County of Honolulu, ROH § 43-1.5 Use of public sewers
Website →Phone: (800) 445-5588 (as listed on that page, checked Oct 4, 2026)Your city or county office: Local governments →Not sure who handles it locally? USAGov's free help line, 1-844-872-4681, or the Hawaii page on USA.gov can point you to the right office. - Know the current info? Tell us and include a link to the official page. We check every tip before it goes up.
Helpful guides
- Who is responsible for the sewer line: homeowner or city?
- What is a sewer lateral (and where does yours end)?
- Sewer line repair and replacement costs
- Sewer scope inspections before you buy
Sewer lateral responsibility check →
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