What happens if you skip the permit (and you needed one)
- Stop-work orders and fines of $100–$500 per day if the city discovers unpermitted work; structural demolition or deck removal may be required if flashing and footing fail to meet code.
- Your homeowner's insurance may deny a claim related to deck failure (collapse, injury, water damage) if the deck was built without permit and inspection.
- Selling your home becomes complicated: Tennessee requires disclosure of unpermitted work, and buyers' lenders often will not finance until the deck is either permitted retroactively or removed.
- Mortgage refinance will be delayed or denied if a lender's appraisal flags an unpermitted deck attachment; some lenders require proof of permits for all structural additions.
Farragut attached deck permits — the key details
Farragut's Building Department requires a permit application, site plan (showing deck location, setbacks from property lines, and utilities), and a structural plan for any deck attached to a dwelling. The critical code section is IRC R507, which governs deck construction. Most importantly, IRC R507.9 mandates that the ledger (the board bolted to your house) must include flashing that directs water away from the rim band and band joist. Farragut inspectors specifically look for flashing installed behind the house siding, not in front of it — a common installer mistake. The ledger must be bolted to the rim band (not the siding) with 1/2-inch bolts spaced 16 inches apart, and the flashing must extend 4 inches above the deck surface and behind the siding per code. If your house is brick veneer or has fiber-cement siding, the flashing detail becomes even more critical because water trapped behind the siding leads to rim-joist rot — exactly the scenario Farragut inspectors are trained to catch.
Farragut's 18-inch frost line (per NOAA data and local soil boring records) means all deck footings must extend a minimum of 18 inches below finished grade. For a standard deck on a wooded Farragut lot, this often means digging through topsoil and into clay or limestone. The city requires either a soils report (if the lot is in a flood zone or known karst area) or, more commonly, a footing detail on your deck plan showing the 18-inch depth and the post-to-footing connection. Frost heave — when frozen soil pushes a post up by 2 or 3 inches over winter — is why this matters: if your deck rises without the house, ledger flashing cracks and you get a water leak into the band joist. Farragut's inspectors will call you back for a footing pre-pour inspection; they'll measure down to confirm the hole is deep enough before you pour concrete. Many DIY builders dig 16 inches and assume frost depth is just a guideline — it is not. Frost-line violations are the single biggest deck rejection reason in Farragut.
Guardrails and stairs have strict dimensional rules. IRC R311.7 requires stairs with a run of 10-11 inches and a rise of 7-8 inches per step; handrails must be 34-38 inches above the stair tread. For the deck itself, IRC R311.5 requires guardrails on any deck over 30 inches above grade; the guardrail must be 36 inches high and resist a 200-pound horizontal load without failing. Farragut does not have a local amendment for 42-inch guardrails (as some hot-climate jurisdictions do), so 36 inches meets code. However, if your deck has a door more than 30 inches above grade, the guardrail is mandatory. Common rejections include stair stringers that don't match code rise/run (off by half an inch) and guardrails that look sturdy but use 6-inch balusters (code requires 4-inch sphere obstruction rule — you must not be able to pass a 4-inch ball through the balusters). Your deck plan must show stair and guardrail details; most plan reviewers will red-line a generic 'standard stair' and demand actual dimensions.
Electrical and plumbing are secondary permits if you're adding an outlet or a water line to the deck. A deck with lights, a ceiling fan, or an outdoor outlet triggers a separate electrical permit under the National Electrical Code (NEC). Farragut's Building Department processes electrical separately, often taking an additional 2-3 business days. Plumbing — such as a hose bib on the deck post — is less common but also requires a plumbing permit. If you're planning either, mention it on the initial deck permit application; the plan reviewer will either bundle the permits or advise you to file separately. Many homeowners add wiring or outlets after the deck is built, then realize they need a separate permit — it's easier to declare upfront.
Permit fees in Farragut are typically $200–$400 for a residential deck, calculated as a percentage of the estimated construction cost (usually 1-2% of valuation). A 12x16 deck at $3,000–$5,000 material cost usually falls in the $200–$250 range. If your deck plan requires revisions, resubmission is often free, but substantial changes may trigger an additional review fee. Inspection fees are typically included in the permit cost. Timeline: submit your permit application, wait 3-5 business days for initial review, address any red-line comments, resubmit, and you're in the queue for footing pre-pour inspection (2-3 weeks out, depending on the season). Plan for the entire process (permit to final inspection) to take 4-6 weeks during peak building season (spring/summer) and 2-4 weeks in winter. The city does offer over-the-counter permit issuance for standard decks without complex setback or drainage issues — walk in with a complete application and you might leave with a permit the same day, though formal plan review still takes a few days.
Three Farragut deck (attached to house) scenarios
Ledger flashing and water damage: why Farragut inspectors check this first
The number-one deck failure in East Tennessee is not a collapsed joist or a loose guardrail — it's water leaking through the ledger connection and rotting the rim band. Farragut's Building Department is aware of this because the city has seen multiple water-damage claims tied to poor ledger installation. IRC R507.9 requires flashing behind the house siding, not in front of it. Many DIYers and unlicensed installers install flashing over the siding (or skip it entirely), which lets water pool on the siding surface and wick into the rim band. Over 3-5 years, the band joist rots, and you're looking at a $4,000–$8,000 structural repair. Farragut's plan review process includes a specific red-line check: Does the deck detail show flashing extending 4 inches above the deck ledger board and extending behind the house siding?
When you submit your deck plan, you must include a detail (usually a 1:1 or half-scale drawing) showing the ledger-to-house connection. The detail shows the rim band, the house siding (vinyl, brick, fiber-cement, whatever you have), the ledger board, flashing (typically aluminum or steel L-flashing), and the bolts (1/2-inch diameter, 16 inches apart). The flashing detail also shows how water sheds off — it should angle slightly downward and extend 4 inches up the wall. If the plan reviewer sees a ledger bolted directly to brick with no flashing, they will red-line it and require a revision. If you're using a house wall with existing trim or soffit, that complicates the detail; the inspector will ask you to remove siding temporarily so the flashing can be installed behind the existing trim. This is why it's worth hiring a carpenter or engineer who has done this before: they know how to detail flashing for vinyl vs. brick vs. fiber-cement. Farragut inspectors are thorough; they'll walk the deck and look at the flashing installation in person during framing inspection.
The second part of the ledger conversation is the rim-band connection itself. The ledger board must be bolted to the rim band (the horizontal board at the top of your house's band joist), not to the siding or the rim joist alone. Many older Farragut houses have a brick or stone veneer that hides the rim band, so you need to locate it (often by checking the basement or crawlspace) before the inspector will approve the bolt locations. If your house is a pier-and-beam foundation (common in post-1950s Farragut ranch homes), the rim band is easier to locate. The bolts must penetrate the rim band fully — if you bolt into only the siding layer, the ledger will pull away from the house during heavy deck loading (people jumping, snow load), and the flashing will fail. Farragut's building code requires a footing-to-ledger connection plan that shows lateral load resistance (how the deck stays attached during a high wind or horizontal earthquake load — Tennessee is low-seismic but code still applies). This is usually achieved via Simpson Strong-Tie connectors (DTT or similar) that tie the ledger to the rim band with bolts and steel brackets.
Frost depth, footing inspection, and Farragut's 18-inch requirement
Frost depth in Farragut is 18 inches below finished grade, per NOAA climate data and the Tennessee Building Code adoption of the 2020 IRC. This means all deck footings (the holes where your posts sit on concrete piers) must extend 18 inches below the surface. This is one of the most commonly violated aspects of deck construction, and it's also one of the easiest for an inspector to verify in the field. When you submit your deck plan, the footing detail must show the post location, the hole diameter (typically 12 inches for a standard 4x4 post), the depth (18 inches minimum), the concrete pier (typically 6 inches tall, sitting on top of the concrete in the hole), and the post-to-pier connection (often a post-base bracket bolted down). Farragut's Building Department will schedule a footing pre-pour inspection within 2-3 weeks of permit issuance; the inspector will visit your lot, measure the footing holes, and confirm they meet the 18-inch depth before you pour concrete.
Why 18 inches? Tennessee winters are mild but not frost-free. When the top 18 inches of soil freeze, ice lenses form in the clay and aggregate, expanding the soil upward by 1-3 inches. If your post footing is only 12 inches deep (above the frost line), the post will heave upward by 1-2 inches over winter, settling back down in spring. Repeat this cycle for a few years, and the ledger flashing cracks, the guardrail bolts loosen, and the entire deck becomes unstable. Farragut inspectors understand this mechanism and will not sign off on a footing that's shallower than 18 inches. Many DIYers dig to 16 inches and think 'close enough' — it is not. If the inspector measures 16 inches, you'll be asked to dig 2 more inches or the footing will be failed. This adds 1-2 weeks of rework to the project.
Farragut's soil conditions also matter. The eastern half of the city (karst zone) can have limestone at relatively shallow depth (3-10 feet), which can make digging difficult — you may hit limestone before reaching 18 inches, in which case the inspector may require a footing detail showing a shallower pier on bedrock, or a soils report certifying that the limestone is stable enough to support the deck load. The western half of Farragut (alluvium and clay) is more straightforward: dig 18 inches into clay or mixed soil, hit bedrock or stable clay, pour concrete, set the post. The footing pre-pour inspection is your chance to confirm the hole depth with the inspector before you pour $500 of concrete; it's worth scheduling that inspection even if you think you've got the depth right.
Farragut City Hall, 11408 Municipal Center Drive, Farragut, TN 37934
Phone: (865) 966-1062 | https://www.ci.farragut.tn.us/ (search 'Building Permits' or contact the department for direct portal link)
Monday–Friday, 8:00 AM–5:00 PM (closed weekends and city holidays)
Common questions
Do I need a permit if I'm just replacing an old deck with a new one in the same footprint?
Yes. Even if you're replacing an existing deck with no size or height change, Farragut requires a new permit. The old deck must be removed and inspected for code compliance (ledger flashing, footing depth, etc.). The new deck must meet current 2020 IRC standards, which may differ from the original 1980s deck (e.g., balusters may need to be closer together, footing deeper). File a new deck permit; the review is usually faster because the footprint is known, but you still need the footing pre-pour and framing inspections.
Can I build a freestanding deck next to my house instead and skip the permit?
A freestanding deck under 200 square feet and under 30 inches above grade is exempt from permitting under Tennessee code. However, if you want a deck that's more than 30 inches high or larger than 200 square feet, or if you want it directly adjacent to your house (even if not attached), Farragut may treat it as a habitable structure and require a permit. Call the Building Department to confirm whether your freestanding deck design is exempt before you build; if you start without a permit and the inspector arrives, you'll face a stop-work order and forced removal.
What if I hire a contractor to build the deck — do I still need to file the permit myself?
No. If you hire a licensed general contractor or deck builder, the contractor typically files the permit in their business name and carries the responsibility for inspections. You'll still need to provide site access and pay the permit fee (often rolled into the contractor's quote). If you're owner-building, you file the permit yourself in your name and must be present for the footing pre-pour and framing inspections — Farragut requires the property owner or an authorized representative on-site for inspections.
Farragut's 18-inch frost depth — is that measured from the finished deck surface or from the top of the post?
The 18-inch frost depth is measured from the finished grade (the top of the ground after grading is complete). Your footing hole must be dug 18 inches below that finished grade surface. The concrete pier sits on top of the soil at the bottom of the hole (18 inches down), and the post sits on top of the pier. So a 4x4 post might extend from 18 inches below grade to 24 inches above finished grade if the pier is 6 inches tall.
I see deck kits sold online with quick-connect footings. Does Farragut accept those instead of concrete piers?
Most quick-connect footing systems (plastic or metal screw-in anchors) are designed for freestanding decks on level, stable soil and are not approved for attached decks or decks over 30 inches high in Farragut. Attached decks must have footings extending below the 18-inch frost line with concrete piers and bolted post bases per IRC R507. Talk to the Building Department if you want to use a non-traditional footing system; you may need a structural engineer's letter of approval, which costs $300–$600 and is often not worth it for a standard deck.
My house is in Farragut but my lot abuts an HOA-controlled area. Do I need HOA approval before filing the deck permit?
HOA approval and city permit approval are separate. Most HOAs require written approval of exterior alterations (including decks) before construction starts. You should get HOA approval first, then file with the city. If your lot is in an HOA, check your CC&Rs for deck guidelines (size, color, materials, setback). The city permit approval does not imply HOA approval, and vice versa. Failure to get HOA approval can result in a demand to remove the deck even after the city inspection is complete.
How much does the permit actually cost for a typical 12x16 deck in Farragut?
A typical 12x16 deck (192 square feet) with an estimated build cost of $3,500–$5,000 will cost $220–$380 in permit fees (usually 1.5-2% of valuation, per Farragut's fee schedule). Inspection fees are typically bundled into the permit fee. If you need a separate electrical permit for an outdoor outlet, add $75–$150. If you need a soils report (karst zone), add $500–$1,500. So total permitting cost is usually $220–$530, not including engineering or soils reports if required.
The inspector failed my footing pre-pour inspection. What happens now?
The inspector will explain what didn't pass (e.g., holes too shallow, poor soil conditions, inadequate spacing). You'll dig additional holes, reach the correct depth, or address soil issues (e.g., remove soft topsoil), then request a re-inspection. Most re-inspections are scheduled within 1-2 weeks. There's usually no additional fee for re-inspection, but the delay adds 1-2 weeks to your timeline. Once the footing pre-pour inspection passes, you can pour concrete and proceed with framing.
Can I start building my deck while my permit is still under review?
No. You must wait for the permit to be issued and all required signatures to be on the permit card. Beginning work before permit issuance is a violation and will trigger a stop-work order ($100–$500 per day fine in Farragut). Even if the review seems to be taking a long time, wait for the official approval. If review is delayed, call the Building Department and ask for a status update; most deck permits are approved within 5-7 business days.
My deck plan was red-lined for ledger flashing. Can I just install the flashing after the frame is built and call it good?
No. The flashing must be installed during framing, before the rim band is fully enclosed. If you wait until after the deck is finished, you'll have to partially disassemble the siding and structure to get the flashing behind the rim band, which is costly and messy. Install flashing during the framing phase, before you cover the house connection. The framing inspection will verify flashing installation; if it's not correct at that point, you'll be asked to fix it before final approval.