County of Hawaiʻi Real Property Tax Division
Hawaiʻi County parcel and tax records
A tax parcel record does not prove legal use, permitted improvements, boundaries, title, or current physical condition.
Open official source ↗Hawaiʻi term
A TMK is Hawaiʻi’s parcel ID—not proof the house is legal.
County tax offices, permit searches, and many listings key off the Tax Map Key. It is the shared identifier across islands. It is not an address, a survey, or a certificate that improvements are permitted.
Reviewed September 3, 2026
Direct answer. Copy the TMK exactly as the county shows it, confirm it matches the property you intend to buy, and still run title, permit, and physical-condition research separately.
Comparable facts
TMK use comparison
Copy the Tax Map Key exactly, then still run title, permit, and condition research separately.
What it identifiesThe tax parcel used by county assessment and many permit searches.
What it does not proveTitle, boundaries, permitted use, wastewater, or insurance eligibility.
How to use it hereKeep it in the browser and paste it into the official county search yourself.
Plain language
What the number is for
A Tax Map Key identifies a parcel in the county real-property system. Buyers, title companies, and county staff use it because similar street addresses and condominium units are easy to mix up. The useful move is to search tax and permit systems with both the address and the TMK, then confirm they describe the same property.
Plain language
What a TMK does not prove
- Ownership or clear title—that is a title report and recorded documents.
- Legal boundaries, easements, or encroachments—that is a survey and title exceptions.
- Permitted bedrooms, additions, or use—that is permit history plus what exists on the ground.
- Wastewater, water, or insurance eligibility.
Plain language
How to use it on this site
The property research launcher lets you keep a TMK in the browser and copy it into official county pages. Hawaiʻi Home Wise does not look up or certify a parcel for you.
Official starting points
Verify the current rule, not this summary.
City and County of Honolulu Real Property Assessment Division
Honolulu parcel and assessment records
Assessment data is not a title report and does not establish permitted use or exact boundaries.
Open official source ↗County of Maui Real Property Assessment Division
Maui County parcel and assessment records
Assessment records may lag ownership or improvement changes and do not establish legal use.
Open official source ↗County of Kauaʻi Real Property Assessment Division
Kauaʻi parcel and assessment records
Assessment data does not establish title, access rights, permit status, or property condition.
Open official source ↗Common questions
FAQ
Is a TMK the same as a street address?
No. One address can be associated with more than one parcel history, and condominium units need careful matching. Always confirm the TMK on the county record against the listing and title documents.
Can I skip the TMK if I have the address?
You can start with the address, but the TMK is often the cleaner key once two nearby properties or a condo map enter the search. Copy it exactly; do not guess missing dashes or zeros.