LADU

Estimate Adu Cost

Estimate the total cost to build an ADU in an LA-area city, including construction and permit fees. Returns a cost range, timeline, and plain-text summary.

List Cities

List all 51 LA-area cities supported by the ADU cost calculator, with their slugs, display names, county, and governing municipality.

Lookup Parcel Rules

Look up the ADU regulatory facts for a specific Los Angeles County property by street address: zoning, lot size, applicable overlays (hillside, coastal, fire, flood, historic, fault, etc.), and the governing jurisdiction's ADU rules (setbacks, max size, max height, parking, permit fees and timeline). Covers all ~2.4M LA County parcels; overlay detail is richest for City of Los Angeles parcels.

Check Buildability

Assess whether an ADU can likely be built at a specific Los Angeles County address. Returns a plain-English buildability verdict (likely / possible with caveats / complex), the parcel's zoning and flagged overlay conditions, the governing jurisdiction's ADU rules, the count of permitted ADUs nearby, and a quotable summary. Use this when a user asks 'can I build an ADU at <address>?'.

Get Adu Rules

Get the structured ADU regulations for an LA-area city: setbacks, max size, max height, parking, permit fees, timeline, and city-specific special rules. City-level (no address needed). Use list_cities for valid slugs.

Get Adu Permit Counts

Get ADU permit totals for an LA-area city from LADU's permit database: total permits on record, permits in the most recent full year, year-over-year change, and median permit valuation. Falls back to the LA County aggregate when a city has little city-specific data (the response says which).

Get Adu Permit Trends

Get the year-by-year ADU permit trend (permits and median valuation per year, 2018–present) for an LA-area city or the LA County aggregate. Use for 'ADU growth in <city>' questions.

Find Nearby Adus

Find permitted ADUs near a Los Angeles County address (within a radius, default 2 miles). Returns recent permits with their address, year, status, JADU flag, and distance — useful for 'are people building ADUs near <address>?'. Addresses only; no owner information.

Get Adu Permit Valuations

Get the distribution (25th percentile, median, 75th percentile) of declared ADU permit valuations for an LA-area city, optionally for a single year. Declared valuation is the applicant's stated construction cost on the permit and is typically lower than all-in project cost — use estimate_adu_cost for a project cost estimate.

Compare Jurisdictions

Compare the ADU rules of two LA-area cities side by side: max size, height, setbacks, parking, permit fees, and timeline. Returns a row-by-row diff and a summary of the differences. Use list_cities for valid slugs.