Public-record property triage for professionals.
GroundRules is a public-record property triage tool for professionals who screen multiple properties before spending money on site visits, offers, quotes, or deeper due diligence.
Built for professionals who screen at volume.
LA-first coverage for the professionals who need a fast, source-backed first pass — before spending time and money on deeper research.
Investor-friendly agents
Screen listings quickly to flag public-record contradictions, hazard layers, or jurisdiction ambiguity before making offers or spending on deeper diligence.
Small infill investors & flippers
Compare properties across multiple addresses without burning time on records you haven't yet verified.
Small builders & contractors
Qualify leads before quoting. Know which properties have known public-record issues before committing to site visits.
Architects & designers
Identify early-stage property-level signals — zoning, overlay, parcel matches — before accepting engagements.
Permit professionals
Surface source-backed parcel, zoning, and jurisdiction signals that matter before submitting permit applications.
Source-backed facts from public records.
GroundRules checks publicly available records — assessor data, GIS parcels, zoning sources, hazard layers, and jurisdiction information — and shows what those records say, where they disagree, and what still needs verification.
Every fact is tied to a source. Every gap is named as unknown. Every contradiction is called out instead of resolved by assumption.
- ✓Assessor vs. GIS parcel discrepancies
- ✓Zoning source and overlay identification
- ✓Hazard layer presence or verification need
- ✓Jurisdiction and APN match uncertainty
- ✓Public-record contradictions flagged near the top
- ✓Known / unknown / verify framing for every finding
What GroundRules is not.
GroundRules is intentionally scoped. Here is what it does not do.
Not an ADU company
GroundRules is not an ADU feasibility tool, ADU estimator, or ADU advisor. Those are separate products for a different purpose.
Not permit approval
Nothing in a GroundRules report constitutes a permit application, permit approval, or pre-approval of any kind.
Not legal advice
GroundRules reports are informational only. They are not legal, zoning, architectural, engineering, or survey advice.
Not a buildability guarantee
GroundRules shows what public records say. It does not certify, guarantee, or confirm that a property can be built on, developed, or permitted.
Not a zoning determination
A GroundRules report is not a zoning determination or planning department opinion. Always verify with the applicable city or county.
Not a substitute for due diligence
GroundRules is a triage tool. It tells you which properties deserve more time — it is not a replacement for professional title, legal, or engineering review.
Ready to start screening?
Paste 5–20 LA addresses and get a source-backed first pass. Free first batch screen.