Methodology
How parcels are selected, how aggregates are calculated, and how sparse pages are filtered. This document is intentionally specific so the numbers on every page can be audited.
Subdivision selection
For this release we focus on three Hillsborough County subdivisions chosen for parcel count, sales history, and value range:
- Davis Islands (SUB code
509) — largest included subdivision by parcel count. - Port Tampa City (SUB code
42J) — strongest qualified-sales history. - Apollo Beach Unit One, Part One (SUB code
1TM) — balanced quality across address, value, and sales fields.
Qualified sales
A sale is "qualified" when the appraiser's QU field is
Q and the sale amount is greater than $1,000. This excludes
$100 deeds, gift transfers, foreclosure transfers, and other recorded
deeds that do not reflect a market transaction. The five-year window is
the period ending on the snapshot date.
Residential classification
We count a parcel as residential when its DOR code is one of
0100, 0101, 0102, 0200,
0300, 0400 (single family, mobile home,
townhouse/condo blends, multi-family, and similar). Vacant residential
and pure condo codes are excluded from the residential count.
Medians and averages
Medians and averages exclude parcels where the underlying field is
zero or missing. We do not impute values. "Median year built" uses
ACT (actual year built); zeros are treated as missing.
Street extraction
The street segment is parsed from SITE_ADDR by stripping
the leading house number and any trailing unit suffix (so condo unit
numbers do not inflate the street count). A street is considered "real"
only if it contains at least one alphabetic character; placeholders such
as 0, blanks, and UNKNOWN are filtered out and
no page is generated for them.
Sparse-page handling
A property page is marked noindex,follow and excluded
from sitemap.xml when either:
- the parcel has no valid site address (the page falls back to a legal description as its title), or
- three or more of these fields are missing: address, owner, just value, year built, heated area, and sale history.
Sparse pages are still rendered so internal links from neighbour and street modules continue to resolve.
Canonical URLs and duplicates
Each parcel has a single canonical URL keyed by its folio number. Where multiple parcels share an exact street address (multi-folio buildings such as hospitals or campuses), titles are disambiguated by appending the folio number so each page presents a unique title to search engines.
What we do not do
- We do not invent latitude/longitude or geo-coordinates.
- We do not generate descriptive adjectives ("desirable", "luxury", "up-and-coming"). All narrative is derived directly from data.
- We do not use review, rating, or product schema.
- We do not make legal, tax, or valuation advice claims.
See data sources for field-level provenance and about for the publishing context.
Last updated . Data compiled from public Hillsborough County property records. This site is independent and not affiliated with any government agency.