Do You Need a Permit for a Patio or Retaining Wall in Bentonville?

A plain patio laid at grade usually does not. The city's Building and Fire Safety Division lists the permits it issues as building, electrical, mechanical, plumbing, moving, demolition, sign, pool, fire alarm, fire sprinkler, kitchen hood and fence permits. An uncovered paver or concrete patio sitting on the ground is not a category on that list.

What changes the answer is everything people add to a patio once they start designing properly. Power to lighting or a kitchen is electrical work. A gas line to a fire feature or a grill is a plumbing and gas matter. A pool is its own permit. A roof tied into the house is a building question. The patio is rarely the permit; the things built on and around it usually are.

So the honest rule of thumb in Bentonville is this: the flat surface is simple, the services and structures are not, and the wall holding the ground up behind it may need an engineer.

A Bentonville retaining wall permit is required once a wall is more than four feet tall. The city's wording covers the construction, replacement or extension of any retaining wall greater than four feet in height, so rebuilding a failed wall in the same spot counts, and so does adding length to an existing one.

The measurement is where people get caught. Bentonville measures from the bottom of the footing on the lower side of the wall to the top of the wall. Part of every properly built wall sits below ground, so a wall that looks comfortably under four feet from the lawn can be over it by the city's measure. Design to the real number, not the visible one.

Above four feet, the wall has to be designed and certified by a professional engineer licensed in Arkansas. The submission asks for a site plan showing property lines, structures, easements and right of way; the wall's height and length including the footing; cross sections and footing design; existing and proposed grades; and engineer-sealed plans that deal with structural stability and drainage.

The process runs in four phases: application, review and approval, routine inspections, and a final inspection that closes the permit out. Applications go through the city's eTrakit portal, and the city asks that every document is uploaded at once so the review is not held up.

The table is a summary of each authority's published material. The detail and the exceptions are in the sections below.

Almost never, on a normal residential lot. Bentonville's grading permit page says the permit is required for grading, filling, excavation or land alteration on any site of one acre or more, where the work is not part of an approved preliminary plat or large scale development. A typical back garden is well under that.

Two cautions. First, the city has published proposed revisions to its grading permit section that would change that threshold, so check which version is in force when you apply. Second, not needing a grading permit is not the same as being free to send water anywhere. Moving the grade changes where rain goes, and your neighbour's yard is not a drainage outlet.

Bentonville sits on the Springfield Plateau. The rock under it is the Boone Formation, limestone interbedded with chert, and where the limestone has weathered you get red clay packed with chert fragments. That clay holds water. Behind a retaining wall, water that cannot get out is weight the wall was never designed to carry.

It is also why excavation is the line on a Bentonville quote most likely to be wrong. Shallow rock is common, and a footing trench that meets a chert ledge at eighteen inches is a different day's work from one that goes down through clay. A contractor who has dug around here prices for that possibility rather than discovering it.

The city's requirement that engineered walls address drainage is not bureaucracy. It is the single thing most likely to decide whether the wall is still straight in ten years.

Then Benton County is the authority, and its rules are different. The county's Building Safety department, which used to be called Community Risk Reduction, handles permits and inspections for unincorporated Benton County.

Since 28 November 2023 the county has not required building permits for Residential Group U structures in unincorporated areas. The county lists detached shop buildings with no living space, carports, storage buildings, decks and fences. A Group U structure cannot be used for sleeping or living in, now or later, without being permitted and brought up to code.

Permits are still required for any structure attached to a residence, for commercial use, and for new plumbing, electrical and HVAC work. The county lists pools among projects that need a permit, and fencing for pools has to meet section 305 of the 2021 International Swimming Pool and Spa Code.

One step people miss: even when no building permit is needed, the county says you still need to contact the Benton County Planning Office for a review of your site plan. Planning is on 479-464-6166. A new driveway connection to a county-maintained road needs a permit from the county Road Department on 479-271-1057.

Settle which authority you are under before anything is designed. City and county processes have little in common, and a Bentonville mailing address does not mean the lot is inside the city.

Take a common brief. A paver patio off the back of the house, an outdoor kitchen with a gas grill and a couple of power outlets, and a retaining wall along the high side of the garden so the patio can sit level. Inside the city limits, here is how it breaks down.

The patio itself is not on the permit list. It still needs the right base for the ground, and the right fall so water leaves it, but nobody at City Hall is inspecting it.

The kitchen brings in trade work. The gas line and the electrical circuits are the permitted parts, done by licensed trades and inspected. Plan the routes before the patio base goes down, because running a line under finished pavers is the expensive way round.

The wall is where the decision sits. If the design keeps it at or under four feet measured from the bottom of the footing, it is outside the permit. If the grade demands more, it becomes an engineered wall with sealed plans submitted through eTrakit. Sometimes the smarter design is a lower wall plus a second terrace; sometimes the engineered wall is the right answer and worth doing properly. Either way, it is decided at design, not discovered on site.

If the same house sat just outside the city line, the county would not need a building permit for the detached pieces, would still need trade permits for the gas and power, and would still want to see the site plan through Planning.

Bentonville asks for the full package in one upload, so assemble it first:

• A site plan with property lines, existing structures, easements and right of way, and the wall's distance to structures and property lines.
• The wall's height and length, with the footing included in the height.
• Cross sections and the footing design.
• Existing and proposed grades.
• Plans sealed by an Arkansas-licensed professional engineer that address structural stability and drainage.

If you do not know where your property lines are, find out before the engineer draws anything. A wall designed to the wrong line is a wall designed twice.

• Is my lot inside the city limits, and how did you check?
• How tall is the wall from the bottom of the footing, not from the lawn?
• Who is the engineer, and does the design show the drainage stone, the pipe and where it discharges?
• Which parts of the job need trade permits, and who is pulling them?
• If you hit rock, how is that priced?

A contractor who answers those without hesitating has done this before. Vague answers on the wall height and the drainage are the ones to worry about.

On our projects, we do. Establishing the jurisdiction, getting the engineer involved where a wall needs one, and submitting through eTrakit is part of running the job, not something handed to the homeowner. You will be asked to sign where the owner has to sign.

If you are managing the project yourself, start with the Building and Fire Safety Division. Applying through eTrakit may need a registered user account, which the office sets up.

This page reflects what the City of Bentonville and Benton County published when it was checked in September 2026. Cities revise codes quietly and Bentonville has grading changes in progress. Before you rely on any of it, confirm with Bentonville Building and Fire Safety, 305 SW A Street, on 479-271-3108 (Monday to Friday, 8 a.m. to 4:30 p.m.). The retaining wall and grading permits are handled by the city's permit coordinator at 3200 SW Municipal Drive, on 479-271-3130. For unincorporated property, Benton County Building Safety is on 479-271-1003.