See what the record says about a site before you walk it.
Parcel geometry, zoning, lot size, FEMA flood and sea-level-rise overlays, mapped cesspool evidence, ownership and the county permit history on the parcel and the ones beside it — for every one of ≈172,000 Oʻahu parcels.
What the record shows about a site.
Nine answers a public authority published, each shown with its source and its date. This is the record; it is not a feasibility study and it is not an engineering opinion.
What is the parcel, exactly?
The mapped boundary, lot size, legal description and TMK — with the CPR fan-out where one parcel carries separately owned units.
What is it zoned?
Zoning class and its description from the State's county-zoning layer, across 1,965 mapped zoning polygons.
Is it in a FEMA flood zone?
The official zone and Special Flood Hazard Area status, from 1,714 mapped flood polygons. A regulatory designation, not a risk assessment.
Is it in the sea-level-rise exposure area?
Against the State's 3.2 ft sea-level-rise inundation modelling.
Is there a cesspool on it?
Mapped cesspool evidence and the Department of Health replacement-priority band, from 10,805 mapped systems on Oʻahu.
What has been permitted here — and on the parcels around it?
Permit history from 432,021 county permit records, 2005–2025. Open a neighbouring parcel and read its history the same way.
Who owns the parcels around it?
Owner of record and tax-bill mailing address on every neighbouring parcel, with the owner-occupant versus absentee signal.
What does the site look like from above?
The City and County of Honolulu 2024 aerial capture at 7.94 cm/pixel at the deepest level, under the parcel boundary.
What is it assessed at?
The county assessment split into land and building, with exemptions, net taxable value and the tax year.
Screen the island, then read the parcels that survive.
The point of the map is to make the site visit the last step rather than the first.
- Screen the island.Colour all ≈172,000 parcels by zoning, assessed value, flood zone or sea-level-rise exposure, then filter by lot size, year built, owner-occupancy and the five Hawaiʻi checks — each of which works in both directions, so you can look for the parcels without a cesspool as easily as the ones with one.
- Read the constraints the record shows.On the parcels that survive, open the record: zoning class, lot size, legal description, the hazard overlays, ownership, and the permit history on the parcel and its neighbours. The check that failed is named, so a parcel you expected to see is one you can argue about.
- Share the exact state.The camera, the colouring, the filters and the selection are in the URL. Send it to a partner, an architect or a lender and they open the same island you were looking at.
And what the site itself measures.
The questions the paper record does not answer, measured from geospatial evidence and published with the evidence each one was drawn from.
How steep is the lot, and the driveway?
Slope across the building site and along its access.
What could be built here?
Development potential against the zoning envelope, read against the ground the parcel actually sits on.
What can be seen from the site, and what would a neighbour take away?
True view measurement from a chosen point, the obstruction that explains it, and the same measurement recomputed against a modelled neighbouring buildout.
What are the roof and building measurements?
Roof area, pitch, orientation and complexity, and the footprint under them.
Where does the sun fall on the site?
Modelled sun and shadow across the parcel through the day and through the year.
What has physically changed on this site?
Change detection across the aerial record, alongside the permit timeline.
What you can order.
One property, every public record that bears on it, delivered as a document.
The Property Intelligence Report is every public record that bears on one Oʻahu property, written up with the source and the publication date on every line: tenure, assessment, zoning, lot, the hazard overlays, mapped cesspool evidence, short-term-rental registration, the transfer record and permit history. It starts at$199 and is delivered in two business days.
Deep Oʻahu is a research tool, not a survey, appraisal, title report, or legal opinion. Confirm anything that decides a purchase with the Department of Planning and Permitting or a licensed professional.
Start with the parcel you are already thinking about.
Open the map, colour the island by zoning or flood zone, and read the record on the parcels that survive.