ADU rules in Escondido

Detached ADUs are allowed on lots zoned for single-family or multifamily use (and in mixed-use zones where applicable) that have an existing or proposed home. Ord. No. 2026-13R, which repealed and replaced Article 70 of the Escondido Zoning Code effective August 28, 2026, sorts ADUs into State Exempt ADUs (built under Gov. Code 66323) and Standard ADUs (built under the city's own standards): a single-family lot may add one detached new-construction State Exempt ADU of up to 800 sq ft with 4-foot side and rear setbacks (§ 33-1474(b)) plus one Standard ADU, which can be a new detached building or a converted accessory structure such as a detached garage (§ 33-1475(a)(5), (c)(1)). On a lot with an existing multifamily building, up to eight detached State Exempt ADUs are allowed, never more than the number of existing units (two beside a proposed multifamily building), again plus one Standard ADU (§ 33-1474(d)). The code defines a detached ADU as structurally independent and at least 10 feet from the main building (§ 33-1472(d)).

Attached and internal ADUs are allowed. A single-family lot may convert space inside the existing or proposed house, or inside an existing accessory structure (with up to 150 sq ft of expansion for access), into one State Exempt ADU, and may also add one JADU of up to 500 sq ft within the walls of the house (§§ 33-1474(a), 33-1476). A Standard ADU may instead be built as an addition attached to or located within the primary dwelling, including attached garages (§ 33-1475(a)(4)); an attached ADU must share a common wall, floor or ceiling with the building, not merely a passageway or porch (§ 33-1472(c)). Existing multifamily buildings may convert non-livable space such as storage rooms, attics, basements and garages into at least one ADU and up to 25 percent of the existing units (§ 33-1474(c)). JADUs are limited to one per single-family lot.

Standard ADUs are capped at 1,200 sq ft of interior livable space whether attached or detached (§ 33-1475(d)(2)); Escondido does not also cap an attached unit at 50 percent of the main home, a less restrictive choice Gov. Code 66325(b) allows. A Standard ADU of 800 sq ft or more must meet the zone's front setback and lot coverage limits while smaller ones are exempt (§ 33-1475(e)(1), (f)), and an attached accessory structure such as a patio cover may not exceed 49 percent of the ADU's area. The detached State Exempt ADU is capped at 800 sq ft (§ 33-1474(b)(2)), conversions of existing space carry no cap beyond the 150 sq ft access expansion, JADUs run 150 to 500 sq ft (§ 33-1476(b)), and every ADU must be at least 150 sq ft. Heights: an attached ADU may reach the main home's height or 25 feet, whichever is greater; a detached ADU beside a single-story home may reach that home's height or 24 feet, whichever is greater, and beside a multistory home the home's height or the zone limit; 2 more feet are allowed for a roof pitch matching the home, and any portion above 18 feet needs 5 more feet of setback from residential neighbors (§ 33-1475(g), (e)(3)(A)). The replaced 2020-2023 Article 70 capped ADUs at 850 or 1,000 sq ft by lot size and bedroom count.

No. The owner does not have to live on a property with an ADU, either at application or afterward: the city's rule is that owner occupancy 'shall not be applied to any State Exempt or Standard ADU' (§ 33-1479(b)(2)), matching Gov. Code 66315. For a JADU, the owner must live in the main home or in the JADU only while the JADU shares sanitation facilities with the house (§ 33-1479(b)(1), tracking Gov. Code 66333(b) as amended by AB 1154), with exceptions for government agencies, land trusts and housing organizations. That JADU rule is carried by a recorded deed restriction that also bars selling the JADU apart from the house (§ 33-1479(b)(4)).

No off-street parking is required for any ADU or JADU in Escondido. The citywide parking table lists 'Accessory dwelling units: None.' (§ 33-765, Article 39, last amended by Ord. 2025-01 in May 2025); Ord. No. 2026-13R lists the Gov. Code 66322 situations in which parking may never be required and treats any parking for a Standard ADU as voluntary, capped at one space and allowed as tandem parking or in setback areas (§ 33-1475(k)(1)-(2)); and JADUs need no parking (§ 33-1476(f)). State-exempt units cannot be given parking rules under Gov. Code 66323(b). A garage, carport or uncovered space removed to build or convert an ADU need not be replaced (§ 33-1475(k)(3)).

Ministerial. Every ADU and JADU is approved through a building permit without discretionary review or a hearing (§§ 33-1473, 33-1481); Ord. No. 2026-13R dropped the separate Planning 'ADU permit' the old code required on multifamily lots. The city must rule on completeness within 15 business days and approve or deny within 60 days of a complete application, after which the permit is deemed approved (§ 33-1481(a), (b), (e); Gov. Code 66317). For a Standard ADU, staff also review driveway, access, transit, sight-distance and similar topics 'pursuant to Engineering design standards' (§ 33-1475(a)(3)), and Standard ADUs beyond the one allowed by right need a development application under Article 61 (§ 33-1475(c)(1)(A)). Projects using the city's pre-approved (PAADU) plans still go through the standard building permit.

ADUs and JADUs may be rented separately from the main home, but only under a rental agreement for a term longer than 30 days (§ 33-1479(a)); Gov. Code 66323(e) and 66333(g) set the same floor for state-exempt units and JADUs. Escondido's Short-Term Rental Ordinance (EMC Chapter 16, Article 8, in effect since July 1, 2025) defines ADUs and JADUs as 'ineligible units' that cannot receive a short-term rental permit, and only owners may host short-term rentals at all (§§ 16-412, 16-414(e)). Ord. No. 2026-13R also opted into Gov. Code 66342: an ADU and the main home may be conveyed separately as condominiums created under the Davis-Stirling Act and the Subdivision Map Act, with every lienholder's consent, a safety inspection before the condominium plan is recorded and, inside an existing planned development, the association's written authorization (§ 33-1479(d)(2)). Otherwise an ADU may be sold separately only to a qualified low- or moderate-income buyer where a qualified nonprofit built the home or ADU (§ 33-1479(d)(1), Gov. Code 66341), and a JADU can never be sold apart from the house (§ 33-1479(c)).