In short
- 469 ADU permits on record, nearly all since 2019.
- 99 in 2025, up 2% from 2024.
- Typical permit time: 137 days from application to permit (median of 384 permits with both dates recorded).
About this data
- Source: California HCD Housing Element Annual Progress Reports. The state data does not say whether an ADU is detached, attached, a garage conversion or a JADU, so most records show as 'unknown'. Permit valuations are not published in this source. Timelines use the application date the city reported to the state, matched to the permit where possible; some cities report their planning application date, so timelines can include planning review. Each project is counted once, in its building-permit year (or completion year when no permit date was reported).
Permits by year
Permits by year and type (table)
| Year | All ADU permits | Garage conversions | Detached |
|---|---|---|---|
| 2018 | 3 | — | — |
| 2019 | 34 | — | — |
| 2020 | 33 | — | — |
| 2021 | 58 | 0 | 0 |
| 2022 | 64 | — | — |
| 2023 | 81 | 0 | 0 |
| 2024 | 97 | 0 | 0 |
| 2025 | 99 | 0 | 0 |
“—” means the source for that year does not report ADU type.
Read more: ADU types explained
Not counted above: 50 approved projects with no building permit reported yet.
ADU rules in Escondido
State law check: HCD sent a technical-assistance letter (May 11, 2026) noting the 2023 ordinance on file may be outdated; no formal findings.
| Rule | Escondido's code | State law guarantees |
|---|---|---|
| Maximum size | Lots under 20,000 sq ft: 850 sq ft (1 bedroom or less) or 1,000 sq ft (more). Larger lots: 1,000 sq ft. Junior ADU 500 sq ft. | At least 850 sq ft (1,000 sq ft with 2+ bedrooms) must be allowed; an 800 sq ft detached ADU always is. Conversions of existing space have no size cap. Junior ADU: up to 500 sq ft. |
| Height | The zone's limit, but a 16 ft ADU is always allowed. | Detached: at least 16 ft (18 ft within ½ mile of transit, plus 2 ft for a matching roof). Attached: 25 ft or the zone's limit, whichever is lower. |
| Setbacks | 4 ft side and rear and the zone's front setback; none for conversions or a rebuild in the same footprint. | No more than 4 ft side and rear; none for conversions of existing space. |
| Parking | None required for ADUs or junior ADUs; no replacement parking for a demolished garage. | At most 1 space; none within ½ mile of transit and in several other cases. No replacement parking when a garage is converted. |
| Owner living on site | None for ADUs. Junior ADU: the owner lives in the house or the junior ADU, with a deed restriction. | None for ADUs. A junior ADU that shares a bathroom with the house requires the owner to live in one of them. |
| How many on a single-family lot | One ADU (attached or detached) plus one junior ADU. | One ADU converted from existing space, one junior ADU and one new detached ADU (up to 800 sq ft). From January 1, 2027: two new detached ADUs (a city then needn't allow a junior ADU on that lot). |
| Short-term rentals | More than 30 days, with a rental agreement. | No guarantee: cities may require rentals of more than 30 days, and junior ADUs can't be short-term rentals. |
- The ADU's entry can't face the nearest side property line or look like a second front door, and colors and materials must match the house.
- ADUs on lots with multifamily buildings need a separate ADU permit.
- Single-family owners can use the city's pre-approved ADU (PAADU) plans.
- Lots with historic buildings or Mills Act contracts have extra design rules.
Where local rules conflict with state law, state law controls. Sources: Escondido Zoning Code Article 70 (33-1470 to 33-1480) · City of Escondido ADU page (checked October 5, 2026) · HCD letter (May 11, 2026); HCD's list of review letters; California ADU rules. Verified Oct 5, 2026. Rules change and every lot is different: confirm with the city before you design.
How long permits take
| Type | Median days, application to permit | Middle half | Permits |
|---|---|---|---|
| Junior ADU (JADU) | 98 | 33 – 178 | 14 |
| Unclassified | 140 | 34 – 256 | 370 |
Middle half: the range covering the middle 50% of permits (a quarter were lower, a quarter higher).
Read more: How long ADUs take to build
From permit to completion
Of the 229 ADU permits Escondido reported issuing from 2020 through 2023, 173 (76%) have a completion reported to the state. For those, the median time from permit to completion was 10 months.
The state reports don't record expired or cancelled permits, and a completion the city hasn't reported looks the same as an unfinished project, so the share is a floor. Years with incomplete reports are left out.
What neighbors declared as cost
Cost data (declared permit valuations) is not published for this area in these sources.
Read more: How to choose an ADU builder
An ADU builder serving Escondido? Feature your business on this page.
Questions about ADUs in Escondido
How many ADUs have been permitted in Escondido?
Public records show 469 ADU permits in Escondido through 2025, nearly all since 2019. 99 in 2025, up 2% from 2024. These counts come from the city's reports to the state, which place a project in its completion year when no permit date was reported.
How long does an ADU permit take in Escondido?
Among the 384 ADU permits in Escondido with both dates recorded, half were issued within 137 days of the application; the middle half took 33 to 255 days. That includes plan-check corrections and resubmittals, not just the review itself.
Can I build an ADU on my property in Escondido?
California law allows ADUs on most lots with a house, including in Escondido, but what you can build depends on your lot, local rules and utilities. This site shows permits, not eligibility. See California ADU rules.
Where do I apply for an ADU permit in Escondido?
Apply with the City of Escondido for an ADU building permit; single-family owners can use the city's pre-approved ADU (PAADU) plans. Official ADU page.
How current is this?
- State annual progress reports: through 2025 (published once a year)
How our data works · Download the data · Free to reuse with credit to SoCal ADU Tracker (socaladutracker.com), under CC BY 4.0.