Unregistered structure detection

Property records
are always wrong.

Pools built without permits. Decks added, undeclared. Additions invisible to insurance underwriters and tax authorities. Skyline finds what's missing from public records — at scale.

14% of US properties have undisclosed structures (IRS estimate)
$2.3B annual property tax gap from undeclared improvements
assessor-view · santa clara county
Recorded
Undeclared 3 flagged

Built for

Insurance carriers
Property tax authorities
Real estate investors
Due diligence firms

What Skyline does

Continuous monitoring

Satellite imagery refreshes every quarter. Skyline rescans your portfolio automatically — new structures appear the moment they're built, not at renewal.

Cadastral overlay

Public assessor records, zoning maps, and permit databases — all overlaid on the same map. Discrepancies surface in seconds, not days of manual research.

Flag & prioritize

Undeclared pools. Additions without permits. Decks over a certain square footage. You set the rules — Skyline flags what matters and scores discrepancy severity.

Exportable evidence

Each flag comes with a satellite image, GPS coordinates, discrepancy type, and date of first detection. Admissible in claims disputes and legal proceedings.

How it works

01

Feed your addresses

Upload a CSV or connect via API. One address or ten thousand — Skyline processes portfolios at any scale.

02

AI reads the sky

Building footprint detection runs on current satellite and aerial imagery via Google Earth AI. Structures are extracted to sub-meter accuracy.

03

Cadastral comparison

Detected structures cross-reference county assessor data, zoning records, and permit databases. Anything missing gets flagged.

04

Review, export, act

A review dashboard shows every flagged property with satellite imagery, discrepancy type, and confidence score. One-click export for claims or legal use.

Every property in America is a living map of decisions — some permitted, some not. Most organizations see only the permitted half.
Skyline exists to show you the other half.