Accessory Structures in Benton County, AR (2026)
2 rules for unincorporated Benton County, Arkansas.
Verified from official government sources
ADU Rules
Unincorporated Benton County lets property owners build one accessory dwelling unit on a lot with a single-family home, but the ADU cannot exceed 50% of the primary dwelling's habitable floor space. ADUs are exempt from full site plan review under Chapter VI of the county's Planning and Development Regulations.
Benton County ADU Size and Permit Rules
Some RestrictionsBenton County Planning and Development Regulations, Ch. III (Definitions) and Ch. VI § 6.1(12)
ACCESSORY DWELLING UNIT - secondary home on the same lot as a primary dwelling. ADUs are independently habitable and provide the basic requirements of shelter, heating, cooking and sanitation. For the purposes of this ordinance, an ADU shall not exceed 50% of the habitable space of the primary dwelling. 12. ... Accessory Dwelling Units as defined in chapter III.
Shed & Carport Rules
Benton County waives the building permit fee for any structure, including a shed, costing $1,000 or less to build, per the county's Sec. 54-4 fee schedule.
Benton County Shed Permit Threshold
Some RestrictionsBenton County, AR Code of Ordinances Sec. 54-4(a)
The fees for building permits required by the building code shall be determined by the total cost of construction in accordance with the following schedule except as provided in this section. The total cost of construction shall be determined by utilization of the ICC Building Valuation table dated August 2007 and attached hereto as an appendix and included as a part of this section. Total Cos...
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