Yes. The City of Smyrna Building Division lists retaining walls among the residential projects that require a permit, and lists them again for commercial projects. Applications go through the city's online permitting portal. If your address is outside Smyrna city limits, confirm with Cobb County which rules apply to your lot.
What the City of Smyrna Publishes
The City of Smyrna Building Division keeps a list of residential projects that require a permit. "Retaining Walls" sits on that list alongside new homes, decks, additions, pool installations and demolition. The commercial list names retaining walls as well.
The same page says applications for building and standalone permits go through Smyrna's online permitting portal, and that in person submittals are no longer accepted. Its advice for anything unclear is plain: when in doubt, visit the portal or call the Building Division.
Other items on the same list that can come with a wall
A retaining wall project can touch other permits too. Two other items on Smyrna's residential permit list are worth reading next to it:
- Land disturbance. Setting a wall can involve cutting into a slope and moving soil, so ask the city whether this item applies to your project.
- Tree removals of trees 24 inches in diameter or larger. If a wall line runs through a large tree, that removal is a separate item on the city's list.
What the City Page Does Not Spell Out
The Smyrna Building Division page does not list a height cutoff, a size exemption or a design submittal requirement for retaining walls. Ask the Building Division what applies to your wall before you plan around any of those.
Before any digging starts, contact the Building Division with the wall's location, length and height, and ask what they need to see. Permit requirements are set by the city or the county, so ask about permits for your project when you call us too.
How the Residential Code Treats Taller Walls
Georgia's state minimum standard for houses is the International Residential Code, 2024 Edition, with Georgia amendments, according to the Georgia Department of Community Affairs. Section R404.4 of the model code addresses retaining walls.
In the model text, a retaining wall that is not laterally supported at the top and retains more than 48 inches of unbalanced fill, or a wall over 24 inches tall that resists lateral loads in addition to soil, shall be designed in accordance with accepted engineering practice. The model text also calls for a safety factor of 1.5 against sliding and overturning.
What that means for a homeowner
Read the 48 inch and 24 inch figures as the point where the model code expects engineering design, not as a permit cutoff. The City of Smyrna list shows no height cutoff, and the city decides what applies to your lot. If your wall is near or above those heights, or if a driveway, a structure or a slope sits above it, expect design questions to come up early.
Poured Concrete Retaining Walls
Retaining walls come in several materials, including stacked block, stone and poured concrete. JJC Concrete builds poured concrete retaining walls.
A poured wall is formed and cast in place on a footing, with the steel the design calls for inside it. We pour walls with aluminum forms, not lumber, and the metal forms give the walls a smooth finish. Our equipment on hand includes excavators, bobcats, lasers and those aluminum forms.
JJC Concrete has poured walls since 2010, and retaining walls are among the wall types we pour, alongside basement walls and foundation walls. We are family owned, based in Marietta, and licensed and insured.
Getting Ready for a Retaining Wall Project in Smyrna
Having a few things in hand makes the permit conversation and the estimate conversation shorter.
Know where the wall goes
Mark the rough line of the wall and note how close it runs to property lines, fences, driveways and the house. A survey of the lot helps if you have one.
Know how tall it needs to be
Measure the grade change the wall has to hold back, from the bottom of the slope to the top. Include anything that will sit above the wall, such as a driveway, a patio, a shed or parked cars.
Know what else is on the site
Note large trees near the wall line, drainage paths where water runs during a storm, and any spots that stay wet. Those details can shape both the design and the permit questions.
Check your neighborhood's rules
Some subdivisions have their own rules about walls, materials or appearance. Those sit alongside the city's permit, so check them before you settle on a design.
See more about concrete work in Smyrna and our poured retaining walls.
Frequently Asked Questions
Does Smyrna require a permit for a retaining wall?
Yes. The City of Smyrna Building Division lists retaining walls among the residential projects that require a permit, and lists them again for commercial projects. Applications go through the city's online permitting portal. Contact the Building Division with your wall's details to confirm what your project needs.
Is there a height below which a Smyrna retaining wall needs no permit?
The Smyrna Building Division page lists no height cutoff or size exemption. Ask the Building Division before you plan around one. The model residential code's 48 inch figure relates to engineering design, not to permits.
When does a retaining wall need an engineer?
In the model International Residential Code, section R404.4 calls for engineering design when a wall not laterally supported at the top retains more than 48 inches of unbalanced fill, or when a wall over 24 inches tall carries loads in addition to soil. Georgia adopts that code with state amendments, so confirm with the city.
Does JJC Concrete build retaining walls in Smyrna?
Yes. JJC Concrete builds poured concrete retaining walls with aluminum forms that give the walls a smooth finish. The company is family owned, based in Marietta, licensed and insured, and has poured walls since 2010. Hablamos español.
Get a Free Estimate for a Smyrna Retaining Wall
If you are planning a retaining wall in Smyrna, send us the wall's location, height and what sits above it. Call (770) 755-2622 or use the estimate form on our contact page for a free estimate.