Deck Permits in Montgomery County, TN

TL:DR - Deck Permits in Montgomery County, TN

  • Confirm whether your property is within the County's jurisdiction or the City of Clarksville's (different permit offices). 
  • You'll likely need a building permit for structures, and you’ll need to submit a site/plot plan with dimensions. 
  • Montgomery County adopted the 2018 IRC (effective Jan 1, 2021, according to multiple county sources). 
  • Plan for inspections—you (the permit holder) must schedule them.
  • Don’t do anything without permits or inspections!

You’ve got the plan for your new outdoor living space. The grill’s ordered, and the string lights showed up in the mail yesterday. And you’ve got the permit, right?

Because if you don’t have a permit, your new deck is a no-go.

Permits are the Cortland Finnegan of paperwork. It’s vital, but nobody likes it. Fortunately, Keystone Custom Decks has your back.

If you’re building a deck in Montgomery County, Tennessee, this guide will help you understand the basics—without drowning in code-speak. 

So let’s put those lights and grill in the shed for now, and get this permit figured out!

Table of Contents

Are You in County Jurisdiction or City Limits?

That’s the first question you need to ask yourself, and where most homeowners get tripped up, thanks to some quirks in how jurisdictions work around here.

The Montgomery County Building & Codes office issues permits for County jurisdiction only—areas outside any city jurisdiction. 

But, if your home is inside Clarksville’s city limits, you’ll typically work with the City of Clarksville Building & Codes instead. 

So before you do anything else, confirm which office owns your address.

Do You Need a Permit To Build a Deck in Montgomery County, TN?

In general, Montgomery County’s zoning rules are clear about one thing:

Buildings and structures require a valid building permit before construction work begins.

There are limited exceptions, such as specific agricultural structures without electrical services. 

Montgomery County’s Building Permit Application also explicitly lists “Deck” as a type of work, which is a huge hint that the County treats decks as permit-worthy work.

The Building & Codes FAQ also says a permit is needed when someone wants to “construct, alter, repair, enlarge… any building, or structure.”

Custom multi-level backyard deck with covered porch attached to a two-story home. Caption: The safe move is to always assume you’ll need a permit and confirm with Building & Codes before you dig a single footing.

The safe move would always be to assume you’ll need a permit and confirm with Building & Codes before you dig a single footing.

How to Apply for a Deck Permit (step-by-step)

Permits feel complicated because the steps are scattered. So let’s make it simple:

Step 1: Download the right forms

Start with the County’s Forms and Information page. It’s the hub for:

Step 2: Prepare the basic info the County expects

Montgomery County’s zoning resolution states that building permit applications should be accompanied by a dimensional sketch or scale plan showing the shape/size/location of buildings, and access (roads/driveways/ingress/egress).

And the County’s Residential Plan Review Requirements list “Decks (free-standing and attached)” as part of the drawings/info they may require in a plan submittal.

In plain English, your deck paperwork usually needs:

  • A plot plan showing where the deck sits on the property
  • Deck dimensions
  • Enough framing detail to show it can meet code (especially if it’s elevated, attached, or complex)

Note that you can often submit your own drawings with a permit application, but they must meet specific local requirements, such as scale, detail, and property lines. You would also need a professional engineer to check your work and apply a stamp for complex work. If you’re determined to submit your own plans, make sure you provide detailed work.

Outdoor living space site plan drawing with patio layout and landscaping details. Caption: Montgomery County’s zoning resolution states that building permit applications should be accompanied by a dimensional sketch or scale plan showing the shape/size/location of buildings, and access (roads/driveways/ingress/egress).

Step 3: Know who can pull the permit

Montgomery County says permits can only be issued to the property owner or a licensed contractor. 

Step 4: Understand how fees are handled

Montgomery County’s Building Permit Fees page lists:

  • An additional $5 archive & records fee for all applications
  • Minimum Permit Fee: $25
  • Reinspection fee: $50 (and it explains when it’s required) 
  • However, there’s also a County PDF fee schedule (dated “as of January 1, 2022”) that lists:
  • Deck (flat fee): $50
  • Re-inspection: $50
  • A “Penalties” note indicating the permit fee can be doubled if work starts before obtaining the permit

It’s worth noting that the webpage's fee structure and the PDF schedule don’t present deck fees the same way. When you see a mismatch like this, call the office to confirm what applies to your deck—websites don’t always keep up with bureaucracy, and vice-versa.

Step 5: Watch the calendar

The County’s Residential Building Permit Important Notices document says permits can become void if:

  • Work hasn’t started within 180 days, or
  • Work is started and then suspended/abandoned for 180 days
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The lesson here? Don’t pull a permit until you’re close to building.

Zoning, Placement: “Where Can the Deck Go?”

You’ve got your permit, but you still can’t build yet. That’s because a building permit is not a zoning approval. Here are a few things you’ll need to know about before reaching out to the Regional Planning Commission:

Setbacks depend on the zoning district

The Montgomery County Zoning Resolution (Feb 2024) includes bulk regulation tables with district-specific setback requirements.

Example: In the table for R-2D / R-3 / R-4 (page 96), it shows:

  • Minimum Front/Street Side Yard setbacks listed as 50 feet (all uses)
  • “Unattached accessory uses” side yard setbacks of 5–10 feet
  • “Unattached accessory uses” rear yard setbacks of 10 feet 

It’s important to note that the table applies to more than decks. It’s a set of standards for the district. Use it as a guide to confirm your deck's classification on your lot.

Special cases that can change your permit path

Montgomery County also flags requirements that may apply before a permit is issued, such as:

If your property is in a Special Flood Hazard Area (SFHA), the County’s Floodplain Development Permit document states it’s a separate process and a prerequisite for Building & Codes applications in those areas.

Deck Design & Code Requirements (the stuff that actually keeps people safe)

By now, you’re probably annoyed at the nitpicking inflicted on you by the permitting office. But here’s the thing—these permits are doing you a favor.

Because a deck failure isn’t an “oopsie.” It could be an ambulance call.

Ambulance responding to an emergency on a roadway. Caption: A deck failure isn’t an “oopsie.” It could be an ambulance call.

Montgomery County adopted the 2018 IRC (and related codes)

Montgomery County states it adopted the 2018 International codes, with enforcement beginning January 1, 2021. 

That matters because the International Residential Code (IRC) governs deck requirements.

If you want to see the deck rules in their natural habitat, ICC’s Digital Codes hosts the 2018 IRC online. Here are examples of deck sections that come up constantly:

Local design criteria you should actually care about

The County’s 2018 code adoption resolution includes local design criteria to address some  potential issues you probably hadn’t thought about:

  • Ground snow load: your deck must be designed to handle snow loads up to 10 psf (IRC R301.2.3).
  • Wind speed: Montgomery County requires your deck to withstand wind speeds up to 115 mph (IRC R301.2.1).
  • Frost line depth: It may not snow much in Montgomery County, but it does get cold. Your footings need to be at least 12 inches deep (IRC R403.1.4).
  • Termite protection: exposed wood should be of preservative-treated or naturally termite-resistant species (IRC 2304.12.4).

It’s the kind of heavy reading you want to subject your teenagers to for punishment for not doing their chores. Or, you could let Keystone Custom Deck’s permit specialists take the punishment for you.

Materials & fasteners: the “hidden” failure point

For decks, the “big takeaway” is simple:

Footings and connectors aren’t optional details. They’re the whole point of the deck.

Elevated composite deck with black railing and outdoor seating area. Caption: Footings and connectors aren’t optional details. They’re the whole point of the deck.

Montgomery County links homeowners to a prescriptive Deck Construction Guide (American Wood Council). It spells out practical standards like:

  • Using preservative-treated or naturally durable lumber where required
  • Using corrosion-resistant fasteners/connectors with treated wood

Inspections: What Gets Checked, and When

Permits aren’t just paperwork—inspections are expected. Like your 9th-grade math teacher, they really want to see your work.

You (the permit holder) schedule inspections

Montgomery County is clear: the permittee is responsible for scheduling inspections. Have your application number ready when you call them.

Common inspection checkpoints you’ll see referenced

The County’s “Residential Building Permit Important Notices” lists inspections such as:

  • Footing / monolithic slab
  • Foundation
  • Framing
  • Final

It’s vital that the county verify your footing is sound—so call them to schedule the inspection before concrete is poured.

For a deck project, the practical takeaway is:

  • Don’t pour footings until the County has a chance to check what’s in the ground.
  • Don’t “cover it up” until the right inspection is passed.

Finally, until the inspections are approved, the county won't issue you a certificate of occupancy.

What Happens If You Build Without a Permit?

If you’re busted for starting work before the permit is issued, you could be looking at double the cost of a permit fee.

Calculator and financial documents used for project cost and budgeting estimates. Caption: If you’re busted for starting work before the permit is issued, you could be looking at double the cost of a permit fee.

You might even get hit with stop-work orders, permit revocation, and other penalties.

Even if you eventually pull that permit, you can still get stuck with having to expose buried footings, removing decking to show framing, rebuilding connections that don’t meet code, and more reinspection fees. So don’t build without a permit!

Build the Deck—But Build it Right

Sounds like it’s not worth building a deck, huh? Here’s the truth: 

Most homeowners don’t struggle with the deck—They struggle with the process.

A deck should feel like freedom—Not a paperwork nightmare.

If you take only one thing from this: confirm jurisdiction, pull the permit, and don’t start anything until you know what the inspector needs to see.

Or, Keystone Custom Decks can take the load off your shoulders and handle it for you.

When you work with us, you get a local builder who works in this region who will:

  • Confirm city vs county jurisdiction fast 
  • Produce clear plans that match what Montgomery County expects
  • Build to the adopted code (2018 IRC) and local design criteria
  • Schedule inspections at the right times
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That’s part of how we keep projects moving—we keep things 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!

Helpful official resources (all in one place)

Here’s what you need if you want to do some homework:

If you’re familiar with Pennsylvania rules, here’s the PA Uniform Construction Code (UCC) as a reference for how other states centralize codes.

If you're planning to build a deck in Montgomery County, TN, we can help you!