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The Arroyo Register

Houses, hills and paperwork along the Arroyo.

the desk answers one slip at a time

Shelf of the room

The Permits

ADUs, HPOZ, Mills Act and what the city lets you build

3 slips · latest filed 09/14/2026

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What an ADU can be on an R1 lot

A reader asks whether a backyard cottage fits an R1 lot in Northeast Los Angeles: sizes, setbacks, the HPOZ question, and the permits in order.

6 min

The Highland Park Garvanza HPOZ

A reader asks what changes when a house sits inside the Highland Park-Garvanza HPOZ: the slip reads the zone, its board and its rules for a buyer.

5 min

Reading a ZIMAS report

A reader's slip on the ZIMAS parcel report: which lines state what a lot already is, its zoning, overlays and permits, and where the record stays quiet.

6 min