Find out what you can rebuild on your property.
Rebuilding after the fires is overwhelming. Ask one question about any LA County address and get your zoning, hazard overlays, and assessor records in seconds, pulled live from official county and city data sources.
Free to use · Informational only, not an official determination · Every answer links to the official source
parcels covered across LA County
live government data integrations
jurisdictions across LA County
to a sourced answer (about 1.5s cached)
One question.
Five government portals.
“What am I allowed to build here?” sounds simple. Answering it means working out which government's rules apply, then searching portals like Z-NET, GIS-NET, ZIMAS, and the Assessor, each with its own interface and vocabulary, then cross-referencing the zoning code and every overlay that modifies it.
The jurisdiction alone trips people up: an Altadena address says “Altadena, CA”, but it's governed by unincorporated LA County, not a city. Days of confusing research, across sites that were never designed to talk to each other.
This tool collapses it into one conversation: enter an address or parcel number, get a structured, jurisdiction-aware answer.
How it works
Ask in plain English
Type an address or parcel number the way you'd say it out loud. Single matches resolve automatically; ambiguous addresses get a picker.
The right government is found
Your parcel is checked against the county jurisdiction locator, because a Pasadena lot follows Pasadena's code, and an Altadena lot follows the county's, not a city's.
Official sources are queried live
Base zoning, overlay zones, hazard layers, and assessor records are pulled in parallel from the correct jurisdiction's GIS services, never from a stale copy.
You get one clear answer
Grouped cards with source attribution and timestamps, an AI summary constrained to the retrieved data, and links to the official viewers so you can verify everything.
What you'll learn about your property
Every lookup surfaces the designations that shape a rebuild, grouped and explained, with a link to the official record.
Base zoning
Your zone designation and category, standardized so a Pasadena result reads like an LA City result.
Fire hazard severity
Whether your parcel sits in a Very High Fire Hazard Severity Zone and what other hazard layers apply.
Seismic & geologic hazards
Alquist-Priolo fault zones, liquefaction, landslide, tsunami, and coastal zones, checked for every jurisdiction.
Historic districts
HPOZs, landmarks, and historic districts that can change what and how you rebuild.
Land use & development rules
General Plan designations, Specific Plans, Community Standards Districts, hillside and environmental overlays.
Assessor records
Living area, year built, lot details, and use type, useful for insurance documentation and like-for-like rebuilds.
See it in action
A real session in 40 seconds: parcel lookup, hazard cards, a follow-up from memory, and a building-code answer with citations.
Under the hood
Truth over fluency: the AI is constrained to answer only from the live per-parcel data it just retrieved. When data isn't available, it says so and points to the official source.
- Stack
- Next.js + TypeScript on Vercel
- Data layer
- 25+ ArcGIS REST integrations across LA County, LA City, Pasadena, Malibu, Santa Monica, and Arcadia services
- LLM orchestration
- OpenRouter with deliberate cross-provider redundancy: Google primary, Anthropic fallback
- Performance
- Parallel GIS queries, in-memory caching, rate limiting; conditional context loading cut a standard query from ~175K to ~1.3K tokens
- Normalization
- One field-normalization layer reconciles six jurisdictions' incompatible schemas into a single consistent output
- Reliability
- Audit logging distinguishes “no data exists” from “query failed”, so every section shows an honest status instead of a silent gap
Your parcel has answers.
Zoning, overlays, hazards, and assessor records for any LA County address. Ask like you'd ask a person.
Look up your property