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Elko County, NV Accessory Structures: ADU Rules (2026)

Significant Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified October 2026

ADU rules in Elko County, NV, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Governing section: Elko County Code § 4-2-3(B)(20), AR district conditional use
Approval: Conditional use permit authorized by the Planning Commission
Size cap: Secondary dwelling floor area cannot exceed the primary dwelling
Permit review: Within two years and every two years thereafter
Mobile homes: A mobile home may not be attached to the primary residence
Maximum fine: $1,000, up to six months in jail, or both

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Nevada under recent ADU streamlining laws. The Elko County, NV rules below cover local size, height, and setback requirements.

Summary

Unincorporated Elko County, Nevada has no general accessory dwelling unit category. Elko County Code § 4-2-3(B)(20) allows an invalid or invalid caretaker secondary independent living unit in the AR district only by conditional use permit, on a parcel already at maximum density, with a floor area cap and a two year review.

These county ordinances apply to unincorporated areas of Elko County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

(B) Conditional Uses: ... The following are conditional uses in the AR district, permitted only when authorized by the planning commission: ... 20. Invalid or invalid caretaker secondary housing. A secondary independent living unit on a lot or parcel already developed to the maximum density allowed in the district, for the housing of an invalid family member or a caretaker of an invalid family member residing in the primary residence on the parcel, subject to the following: (a) The dwelling may be attached or detached from the primary residence. A mobile home may not be attached to the primary residence. (b) The floor area of the secondary dwelling may not exceed that of the primary dwelling. (c) The conditional use permit must be reviewed within two (2) years and every two (2) years thereafter.

View official code

Full Breakdown

In the AR Agricultural-Residential district, a single-family dwelling not to exceed one unit on each parcel is the permitted residential use under § 4-2-3(A). A second dwelling arrives only through conditional use item 20 of § 4-2-3(B), which the Planning Commission authorizes. The item covers invalid or invalid caretaker secondary housing: a secondary independent living unit on a lot or parcel already developed to the maximum density allowed in the district, for the housing of an invalid family member or a caretaker of an invalid family member residing in the primary residence on the parcel.

Four conditions attach. Under (a), the dwelling can be attached or detached from the primary residence, but a mobile home may not be attached to the primary residence. Under (b), the floor area of the secondary dwelling cannot exceed that of the primary dwelling. Under (c), the conditional use permit must be reviewed within two years and every two years thereafter. Under (d), a mobile structure must be removed when it is no longer used for invalid or invalid caretaker housing, and an attached or conventionally constructed unit where removal is impractical cannot be used as rental housing.

The A Agricultural-Recreational district carries the same item as conditional use 12 of § 4-2-4(B). The code also defines a GUESTHOUSE in § 4-1-9 as a detached accessory building with living quarters for temporary guests of the occupant, and it lists one guesthouse per parcel as a conditional use in the OS district and the A district. A guesthouse can contain a kitchen or cooking facilities. This code applies only in unincorporated Elko County. Elko, Carlin, Wells and West Wendover regulate secondary dwellings under their own codes.

Violations & Fines

A secondary dwelling built or used outside the conditional use terms is a use contrary to the zoning title. Section 4-9-14(A) declares it a public nuisance that the District Attorney can move to abate, and § 4-9-14(B) makes the violator guilty of a misdemeanor, with a fine of not more than $1,000, jail of not more than six months, or both. Each day is a separate offense.

Frequently Asked Questions

Can I build an accessory dwelling unit in the AR district in Elko County?

Only as invalid or invalid caretaker secondary housing. Elko County Code § 4-2-3(B)(20) allows a secondary independent living unit by conditional use permit on a parcel already developed to the maximum density allowed, for an invalid family member or a caretaker of an invalid family member living in the primary residence.

How large can the secondary dwelling be?

The floor area of the secondary dwelling cannot exceed that of the primary dwelling, under paragraph (b). The unit can be attached or detached, but paragraph (a) states that a mobile home may not be attached to the primary residence. The Planning Commission sets the permit terms.

How often is the permit reviewed?

Paragraph (c) requires the conditional use permit to be reviewed within two years and every two years thereafter. The review keeps the housing tied to its stated purpose of sheltering an invalid family member or caretaker residing in the primary residence on the parcel.

Is a guesthouse different from a secondary dwelling?

Yes. Section 4-1-9 defines a guesthouse as a detached accessory building with living quarters for temporary guests of the occupant of the dwelling, and one guesthouse per parcel is a conditional use in the OS and A districts. The AR conditional use list in § 4-2-3(B) does not name guesthouses.

Sources & Official References

[1]Elko County Code, Title 4 (American Legal)

Other rules in Elko County

Parking Rules: Street Parking LimitsSome Restrictions Fence Regulations: Height LimitsSome Restrictions Shed & Carport RulesSome Restrictions Parking Rules: RV & Boat ParkingSome Restrictions Tiny HomesSome Restrictions ADU Rental RestrictionsSignificant Restrictions Noise Ordinances: Barking DogsSome Restrictions Parking Rules: Abandoned VehiclesSome Restrictions Parking Rules: Loading ZonesSome Restrictions

All Elko County rules

How Elko County compares: Easiest Cities to Build an ADU·Compare Elko County to another location·View the Nevada accessory structures overview

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