ADU Rules in Arkansas
Meta description: Arkansas passed new ADU laws in 2025 making it easier than ever to build a guest house, in-law suite, or rental unit. Here's what Central Arkansas homeowners need to know.
If you've been thinking about adding a guest house, in-law suite, or backyard cottage to your property in Arkansas, 2026 is the best time to do it. New state legislation has made ADU construction easier, more affordable, and more protected than ever before — and homeowners across Central Arkansas are taking notice.
Here's everything you need to know about ADU rules in Arkansas and how to get started.
What Is an ADU?
An Accessory Dwelling Unit (ADU) is a secondary, self-contained living space on the same lot as a primary single-family home. ADUs — also known as mother-in-law suites, garage apartments, backyard cottages, and carriage houses — must include their own cooking, sleeping, and bathroom facilities, and must be independently accessible. Google Sites
ADUs can be attached to your main home, detached as a standalone structure in your backyard, or converted from existing space like a garage or basement. Arkansas does not limit ADUs by architectural style, so a sleek contemporary cabin, a minimalist studio, or a modern modular design can all qualify as long as they're built as fully functioning dwellings on a code-compliant permanent foundation. Aurora NWA
Arkansas's New ADU Law — Act 313 (HB 1503)
The biggest news for Arkansas homeowners is that the state passed sweeping ADU reform legislation in 2025. Thanks to HB 1503, Arkansas became the eighth state in the U.S. to pass statewide ADU regulations, establishing a clear baseline that cities must follow and making ADUs more accessible for the average homeowner. Ignite Digital
Here's what the new law means for you:
Municipalities are now required to allow at least one ADU by right on any residential lot — meaning approval without a public hearing or discretionary zoning action. Cities are prohibited from requiring additional parking, mandating owner occupancy, demanding matching exterior design, or imposing high development impact fees. Direction
Application fees for ADUs are capped at $250. Direction That's a significant protection for homeowners who were previously facing thousands of dollars in local permitting fees.
The law also allows for attached, detached, and internal ADUs and does not require the property owner to live on-site. Google Translate
How Big Can an ADU Be in Arkansas?
Most Arkansas jurisdictions use one of two size standards: a fixed maximum of 1,000 square feet, or 75% of the primary dwelling's size — whichever is smaller. This ensures the ADU remains a secondary structure rather than a second primary residence on the property. Aurora NWA
For most Central Arkansas homeowners with a 2,000+ square foot primary home, this means you can build an ADU up to 1,000 square feet — large enough for a full one-bedroom or two-bedroom layout with a kitchen, living area, and bathroom.
What ADUs Cannot Override
The new state law is strong, but it has limits worth knowing. The law does not supersede private neighborhood covenants, which can still restrict ADU construction, and it leaves the regulation of short-term rentals to local governments. Google Translate If you live in a neighborhood with an HOA, check your covenants before planning your project — HOA rules can still block ADU construction even where state law allows it.
Cities also retain the right to enforce standard building codes, fire prevention requirements, and local zoning setback rules for placement on your lot.
Why Are ADUs So Popular Right Now in Arkansas?
Arkansas is facing a persistent housing shortage — the deficit of rental units affordable to low-income households grew from 7,100 in 2019 to 9,300 in 2025 — and ADUs have emerged as a practical, cost-effective solution for expanding housing supply without requiring new land development. Google Translate
For individual homeowners, the reasons are more personal. The most common reasons Central Arkansas homeowners build ADUs with Lifestyle Homes include housing aging parents or adult children nearby while maintaining privacy, generating rental income to offset mortgage costs, creating a dedicated home office or studio, and adding long-term value to their property.
What Does It Cost to Build an ADU in Arkansas?
ADU costs vary significantly based on size, finish level, site conditions, and whether the unit is attached or detached. A basic attached conversion (like a garage conversion) will cost considerably less than a fully custom detached guest house with high-end finishes. The best way to get an accurate number is to schedule a consultation with a builder who can assess your specific lot and goals.
At Lifestyle Homes by Greg Lasker, we've built ADUs across Conway, Little Rock, and Central Arkansas at a range of price points. We handle the entire process in-house — design, permitting, construction, and final walkthrough — so you're never managing multiple contractors or guessing what comes next.
How to Get Started With an ADU in Arkansas
Getting started is simpler than most people expect. First, confirm your property's zoning and any HOA restrictions. Second, check your lot size and setback requirements with your local planning office — these vary by city and county. Third, consult with a design-build team who can assess your site and walk you through realistic options and costs.
If you're in Conway, Little Rock, Maumelle, or anywhere in Central Arkansas, we'd love to help. Call Greg Lasker directly at 501-470-6234 or visit laskerlifestyle.com/contact to schedule your free ADU consultation.
