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ADU Market Data

ADUs in Winnetka (91306)

745 ADU building permits have been issued in ZIP 91306 since 2020, from Los Angeles City permit records refreshed weekly. Here is what your neighbors actually built, and how long it took.

745

ADU building permits issued since 2020

176 / 569

new builds / conversions and additions

3 mo

median time from application to permit

1,068 sq ft

median new-build ADU size

$120,000

median declared valuation, new builds

Permits issued by year

2020
71
2021
106
2022
140
2023
111
2024
115
2025
130
2026
72

The current year shows permits issued so far, not a full-year total.

Thinking about joining them?

Start where your neighbors should have: find out what your own lot allows, then build a budget with rental return. Both free, both about 2 minutes.

Source: Los Angeles City Building & Safety permit records via the city's open data portal, refreshed weekly. Counts are building permits flagged as adding or changing an ADU (new construction, garage conversions, and additions) issued in ZIP 91306 from 2020 to present. Median time from application to permit covers the same permits. Valuations are the declared construction value on the permit, which typically runs below real-world project cost.