Deck Permits in Wilson County, TN
TL:DR - Deck Permits in Wilson County, TN
- You must determine if you are in County Jurisdiction or City Limits (Lebanon, Mt. Juliet, or Watertown) as the permit office is different.
- A building permit is required for any residential deck 200 square feet or larger, though zoning setbacks apply even if the deck is smaller.
- The application process involves preparing detailed, accurate plans and submitting the Accessory Structure Checklist in person to the Building Code’s office; only check, cashier’s check, or money order are accepted for payment.
- Decks must comply with the 2021 International Residential Code, covering requirements like footings extending below the frost line, using ground-contact rated lumber, and installing proper corrosion-resistant fasteners and lateral load connectors.
- Skipping a permit can lead to stop-work orders, forced rework or demolition, fines, and problems with homeowners insurance or home resale.
Building a deck? You’re going to need lumber, fasteners, decking, grills, furniture, oh, and a permit. That’s right, it’s that piece of paper that you pay for and does nothing but give you headaches.
Or does it? That truth is, permits are the path to happiness, because that piece of paper will make sure your deck is built according to code, which means it’s safe, solid, and ready to give you years of enjoyment.
At Keystone Custom Decks, we’re all about that legitimate deck. We’re going to talk about the process of pulling a permit in Wilson County and what you’ll need to do to build a deck in Wilson County safely and legally.
Ready to go? Let’s hit it!
Are you in County Jurisdiction or City Limits?
Like the Duke Boys being able to escape from Cletus by jumping the county line, the county’s jurisdiction when it comes to your permit depends on whether you live within city limits or the county itself.
The Wilson County Building Codes Division only issues permits for unincorporated areas of the county. So if your property sits inside the city limits of Lebanon, Mt. Juliet, or Watertown, you’ll have to deal with that city’s building department instead.
There is one quirk to how permits are handled. Watertown has its own permit application, but the County handles it. That’s not true of Lebanon or Mt. Juliet. If you’re unsure, you can call the Wilson County Building Codes office at (615) 444-3025 or stop by the office at 228 East Main Street, Lebanon, TN 37087.
For this blog, we’re focusing on Wilson County.
Do You Need a Permit to Build a Deck in Wilson County?
You probably do.
For residents of Wilson County, here’s how residential projects are broken down:
- For any deck 200 square feet or larger, a building permit is required.
- For decks under 200 square feet, no building permit is required, but zoning setbacks still apply.
- Fun fact: for commercial projects, the threshold for a deck permit is 120 square feet or more, and a plan review is required.
Even if your deck is under 200 square feet, it doesn’t mean you can do what you want. You still need to put it in the right place on your lot, and that’s determined during your initial document submittal.
How to Apply for a Deck Permit
It’s got several steps, but here are the CliffNotes you’ll need to get by:
- Step 1: Download the Right Checklist
Decks fall under the Accessory Structure category in Wilson County’s purview, so download the Accessory Structure Building Permit Application Checklist from the county website. This document also lists exactly what you’ll need to bring when you visit the county office.
- Step 2: Prepare Your Plans
Your paperwork will need to show:- A plot plan with the deck’s location and distance from property lines
- Deck dimensions, which should include length, width, and height above grade.
- Framing details that specify the main components of your deck: ledger, beams, joists, posts, and footings.
- Stair and railing details if your deck is elevated.
You can draw your own plans, but they have to meet the county’s standards for scale, detail, and accuracy on an 11x17 sheet of paper. No sketches on the back of a paper napkin — you’re not designing the Rutan Voyager — it’s not hard, but it does require attention to detail and a little time.
- Step 3: Know Who Can Pull the Permit
Only two people are allowed to pull a permit—the property owner of record (that’s you), or a state-licensed contractor. To allow a contractor to pull the permits on your behalf, the property owner has to sign and notarize certain documents naming the contractor.
- Step 4: Submit Your Application
This is the big step. Make sure your t’s are crossed, and your i’s are dotted, then submit your permit application in person at the Building Code’s office. Payment is accepted only by check, cashier’s check, or money order. No credit cards, cash, or any other electronic payment methods are accepted.After dropping the application off, you play the waiting game. Applications will not be processed until after 3:30 pm, so don’t show up at 3:45 expecting it to be done.
Finally, don’t pull the permit until you’re actually ready to build! Permits have a shelf life, typically 180 days. You’ll risk the permit lapsing if work stops.
Zoning and Setbacks
A building permit means you have the go-ahead to build your deck. It’s not the same as zoning approval, which is where you’re allowed to build the deck.
Decks are treated as part of the main structure, which means they have to respect your property's yard setbacks. These vary by district, so always verify before you draw up plans.
Here's a detail that trips people up: If your lot is less than 5 acres and you didn't submit a stamped, surveyed plot plan, Wilson County requires a setback inspection before you dig footings. That means the construction area has to be marked, and the property lines have to be strung so that the inspector can see them clearly. You can obtain your plot plan online from the county property assessor’s office.
Deck Design & Code Requirements
Some of this is going to feel picky, especially if your deck isn’t up to code after all the work you’ve put into designing it. But these strict requirements are there for a reason.
Deck failures can be dangerous, potentially causing injury and even fatalities. You don’t want that on your conscience.
Wilson County enforces the 2021 International Residential Code. That's the standard your deck must meet. Here's what matters most:
Footings
- Must extend below the frost line — at least 12 inches deep in Tennessee, sometimes more depending on site conditions.
- Sized to carry the deck's load, typically 40 pounds per square foot.
- Concrete only. No lateral pressure against the house foundation.
Lumber and Fasteners
- Pressure-treated lumber rated #2 grade or better for the conditions, and ground-contact rated where required.
- Corrosion-resistant hardware—hot-dipped galvanized or stainless steel. Regular screws won't pass.
- Threaded nails to prevent popping as the wood expands and contracts.
Ledger Boards and Lateral Load
- Attach to a 2x8 ledger board, plus proper flashing, to keep water out of your home.
- Lateral load connectors are required to prevent the deck from pulling away from the house in high winds.
Remember — the ledger board connects the deck to the house's frame, not the siding. It must be securely connected to the house, as your joists will also be fastened to the ledger board.
Guardrails and Stairs
This is optional, unless your deck is 30 inches or more above grade, in which case it’s required.
- Guardrail height: at least 36 inches.
- Baluster spacing: no opening that lets a 4-inch sphere through.
- Stair width: minimum 36 inches. Max riser 7.75", min tread 10".
- Handrails are required for any stair flight with more than 4 risers.
Eyes glazing over yet? That’s fair. This is why people hire a contractor who knows the code by heart.
Inspections: What Gets Checked and When
Permits come with inspections. And the inspector really does want to see your work.
Important: Wilson County does not offer same-day inspections. Inspectors have 72 business hours to complete a requested inspection, though they often get there sooner.
According to the county's inspection process page, here's what you'll need for a deck build:
- Setback Inspection (if required) — before footings are dug.
- Foundation Inspection — footings and post holes, before concrete is poured.
- Framing Inspection — after structural framing is complete, before decking boards go down.
- Final Inspection — once the deck is 100% complete. The Building Official reviews before the Certificate of Occupancy is issued.
Re-inspection fees add up fast:
- 1st failed inspection: $75
- 2nd failed inspection: $150
- 3rd failed inspection: $300 and a stop-work order
And if you try to use the deck before the final inspection passes? That's a $500 penalty.
Remember, the inspector isn’t there to make your life miserable. He really doesn’t want to come back for a reinspection. His job is to ensure your deck is safe so you can enjoy it for years to come.
What Happens If You Build Without a Permit?
Thinking about skipping the permit? Here's what you're signing up for:
- Stop-work orders: construction halts on the spot.
- Forced rework: You may have to expose buried footings or remove decking so the inspector can verify the framing.
- Tear-down: if the structure can't be brought into compliance, it comes down.
- Insurance issues: your homeowners policy may not cover damage caused by an unpermitted build.
- Resale headaches: unpermitted decks are red flags during home inspection and can tank a sale.
Wilson County has an online complaint form, too, where neighbors can report construction without a permit. If you think nobody will notice, think again. So don't skip the permit. It's really that simple.
Build the Deck—But Build it Right
Most homeowners don't struggle with the deck itself. They struggle with navigating the paperwork. With this guide, you should have a better idea of what’s required to build your own deck.
So confirm your jurisdiction, pull the permit, and don't start anything until you know exactly what the inspector needs to see.
Or, let Keystone Custom Decks take the whole thing off your plate.
We work across Wilson County and all of Middle Tennessee. When you build with us, you get a local team that will:
- Confirm county vs. city jurisdiction fast.
- Produce clear, complete plans that match what Wilson County expects.
- Build to the 2021 IRC and local design standards.
- Schedule inspections at the right moments so nothing gets held up.
We keep projects on the level. We don't cut corners. And we don't mess around.
Contact us today and let us do the worrying for you!
Disclaimer
Any bureaucracy, although it may seem slow, can also be very fluid. While the information in this blog has been researched to the best of our knowledge, it's important to note that:
- The information is gathered from publicly available online sources.
- Permitting rules and requirements can change or vary by township.