Lake Havasu City, AZ Accessory Structures: ADU Owner Occupancy (2026)
Key Facts
- Max ADUs per parcel
- 1 (Section 14.03.03.E.1.a)
- ADU size range
- 400-1,000 sq ft, or 50% of primary home
- Detached ADU setback
- 5 ft minimum from side/rear line
- Detached ADU height cap
- 15 feet
- Owner-occupancy rule
- Primary home or ADU must be owner-occupied
- Civil fine range
- $200-$2,500 per day (Section 1.12.040)
Summary
Lake Havasu City's Development Code allows one accessory dwelling unit per single-family parcel, but requires that either the primary residence or the ADU itself be occupied by the property owner. The ADU definition in the city's Development Code, Chapter 14.06, sets that owner-occupancy condition directly, while the accessory-use standards in Chapter 14.03 cap unit size, placement and setbacks. The Zoning Administrator enforces the rule through Development Code compliance procedures.
ACCESSORY DWELLING UNIT. A subordinate dwelling unit added to, created within, or detached from a single-family residence, without interior access to the primary dwelling, but located on the same lot or parcel as the primary residential structure. Either the primary or accessory dwelling unit must be occupied by the owner of the property.
Full Breakdown
The owner-occupancy condition comes from the ACCESSORY DWELLING UNIT definition in Development Code Section 14.06.03: an ADU is a subordinate dwelling unit added to, created within, or detached from a single-family residence, without interior access to the primary dwelling, but located on the same lot or parcel as the primary residential structure, and either the primary or accessory dwelling unit must be occupied by the owner of the property. The accessory-use standards at Section 14.03.03.E.1 add the numeric limits that go with it: only one ADU is allowed per parcel, the unit must not alter the character of the premises as a single-family residence, and it must run between 400 and 1,000 square feet, capped at 50% of the primary structure's living area, whichever is less.
A detached ADU cannot sit within 5 feet of a side or rear property line or on a utility easement, cannot cover more than 50% of the required rear yard, cannot exceed 15 feet in height, and must keep at least a 3-foot separation from the primary structure or the Building Code minimum, whichever is greater. It must meet Building and Fire Code requirements and, architecturally, must match the primary structure's materials, features and colors. Separate electric and gas meters are allowed, but the second meter must carry a metal plaque with a half-inch letter designation.
Notably, the same Section 14.03.03.E.9 that regulates backyard fowl excludes ADUs on single-family detached lots from the city's separate allowance to keep additional fowl, meaning the fowl limit runs with the primary house only.
Violations & Fines
The Zoning Administrator enforces the Development Code under Section 14.05.06 and may issue a civil citation for an ADU that is occupied, sized or sited outside these limits. Section 14.05.06.E routes enforcement through Chapter 1.12, where Section 1.12.040 sets a civil fine of $200 to $2,500 per day for a first violation, rising to a $400 minimum for a third offense and a $600 minimum for a fourth or later offense within the same calendar year.
Frequently Asked Questions
Does Lake Havasu City require the property owner to live on-site with an ADU?
How many accessory dwelling units can one Lake Havasu City lot have?
How big can an ADU be in Lake Havasu City?
What happens if an ADU in Lake Havasu City violates the owner-occupancy rule?
Sources & Official References
Other rules in Lake Havasu City
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