LADU
For AI agents & developers

LADU MCP Server.

Connect any MCP-compatible AI assistant — Claude, Cursor, and others — to LADU's ADU data: per-parcel buildability checks, city ADU rules, cost estimates, and 19,000+ LA County permit records. Free, read-only, no authentication required.

Connect in 30 seconds

The server speaks MCP over JSON-RPC 2.0 (Streamable HTTP). Add it to your client config:

Claude Desktop / Cursor — mcp config
{
  "mcpServers": {
    "ladu": {
      "url": "https://www.ladu.co/mcp"
    }
  }
}
Endpoint
https://www.ladu.co/mcp
Auth
None — rate-limited per client

Example call

Ask whether an ADU can be built at an address:

curl -X POST https://www.ladu.co/mcp \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "check_buildability",
      "arguments": { "address": "123 Main St, Los Angeles, CA 90018" }
    }
  }'

Available tools

Ten tools across property buildability, jurisdiction rules and cost, and LA County permit data. Every response includes its data source.

Property & buildability

  • check_buildability

    Plain-English buildability verdict (likely / possible / complex) for a specific address, with nearby permitted ADUs and a quotable summary.

  • lookup_parcel_rules

    Zoning, regulatory overlays, and applicable ADU rules for any LA County address.

  • find_nearby_adus

    Permitted ADUs within a radius of an address (addresses only — no owner data).

Rules & cost

  • get_adu_rules

    Structured ADU regulations for a city: setbacks, max size, height, parking, fees, timeline, and special rules.

  • compare_jurisdictions

    Side-by-side diff of two cities' ADU rules.

  • estimate_adu_cost

    Construction cost, permit fees, and total project cost for an ADU by city, size, type, and finish level.

  • list_cities

    All supported city slugs and their governing municipality.

Permit data

  • get_adu_permit_counts

    Total ADU permits, recent-year count, year-over-year change, and median valuation for a city.

  • get_adu_permit_trends

    Year-by-year ADU permit and valuation series for a city or LA County.

  • get_adu_permit_valuations

    25th / median / 75th percentile of declared ADU permit valuations for a city, optionally a single year.

Data & privacy

Permit and parcel data comes from public LA County Assessor and LA City / County Building & Safety records (2018–present), deduplicated by case number. See the data methodology.

The server is read-only and runs against a least-privilege database role. It returns property characteristics, regulations, and permit aggregates only — never owner names, contact details, or financial data.

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