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Downey · ADU permits
Welcome from the Downey permit page. 468 ADU permits issued in 2025.
Drop your Downey address below to run the full pathway for your specific lot.
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Expedite your Los Angeles Accessory Dwelling Unit (ADU), or any other permit, with our easy-to-use Permit Expediter wizard. Type your address above or pin it on the map below.
The same zoning lookups, overlay checks, and Los Angeles Department of Building and Safety (LADBS) workflow a permit expediter walks you through, in your browser.
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Try the wizard on these LA properties
Rotates daily · in high-ADU-volume LA neighborhoods
Northridge
For sale9847 Bothwell Rd, Northridge, CA 91324
RA-1 (Suburban Residential) zone, large-lot pedigree. 6BR/7BA / 5,453 sqft estate-class home with serious ADU room — top-end Northridge property.
North Hollywood
For sale8125 Alcove Ave, North Hollywood, CA 91605
R1-1, 8,564 sqft flat lot with existing detached garage. Listing explicitly flags ADU potential — top-volume LA ADU neighborhood.
North Hollywood
For sale11667 Arminta St, North Hollywood, CA 91605
R1-1, 6,337 sqft lot, recently renovated single-story with existing solar. ADU build alongside existing solar = bonus rapid-shutdown coordination opportunity.
Featured neighborhoods this week
Browse all →LA County city
Cerritos
Top-rated ABC Unified School District (ABCUSD), the iconic Cerritos Library + Performing Arts Center, and a substantial Asian-American population drive strong Accessory Dwelling Unit (ADU) rental demand. Mid-tier home values with $2M+ pockets qualify for the financing leadSurface.
Zips: 90701 · 90703
LA County city
Gardena
Mid-tier home values, deep Japanese-American cultural history, and South Bay aerospace employment access make Gardena a steady Accessory Dwelling Unit (ADU) market.
Zips: 90247 · 90248 · 90249
LA County city
Diamond Bar
Hillside lots, top-rated Walnut Valley Unified School District (WVUSD), strong Asian-American community + restaurant scene, and Diamond Bar Center civic facility drive solid Accessory Dwelling Unit (ADU) economics with $2M+ pocket presence justifying financing leads.
Zips: 91765
LA County city
Rolling Hills
Among the most exclusive cities in California. Multi-acre equestrian lots and high home values support premium Accessory Dwelling Unit (ADU) economics. The trade-offs are aggressive design review, near-universal Very High Fire Hazard Severity Zone (VHFHSZ) coverage, hillside grading, and the gated-private nature of the city.
Zips: 90274
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