Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Fences under 6 feet in rear or side yards are typically permit-exempt in Union City; anything 6 feet or taller, any fence in a front yard (corner-lot sight lines), and all pool barriers require a permit. Masonry walls over 4 feet also require permits.
Union City, like most Georgia cities in Fulton County's jurisdiction sphere, enforces a tiered permit system based on height and placement. The critical difference from neighboring cities (Atlanta, East Point, Hapeville) is Union City's strict application of corner-lot sight-distance rules — the city's zoning code requires that fences on corner lots be set back further and kept lower in the visibility triangle, and the Building Department will flag this on the intake form itself. Most importantly, Union City does NOT issue blanket exemptions for replacement fences the way some Georgia cities do; if your old fence was unpermitted and you want to replace it with the same height, Union City's interpretation is that you still need a permit if that height exceeds 6 feet or if it's in the front yard. The fee structure is flat ($50–$150 depending on scope) rather than linear-foot-based, and plan review typically happens over-the-counter for non-masonry residential fences under 6 feet. Pool barriers (any height) trigger the full IRC / Georgia Safety Code checklist and require footing inspection.

What happens if you skip the permit (and you needed one)

Union City fence permits — the key details

Union City's Building Department enforces the Georgia Building Code (most recent IBC/IRC edition adopted by the State of Georgia) plus local zoning ordinance amendments specific to Union City. The foundational rule is simple: residential fences under 6 feet in side or rear yards, non-masonry, and not pool barriers are permit-exempt. However, the exemption is not automatic — you must be able to prove the fence meets all three conditions. Any fence in the front yard (defined as the area between the property line and the front setback line on your plat) requires a permit, regardless of height. Corner lots are especially tricky: Union City's sight-distance triangle (typically a 25-foot sight line from the corner along both street frontages) must remain clear of obstructions over 3.5 feet in height. If your corner-lot fence enters that triangle, even at 4 feet, the city will require you to either setback the fence or reduce its height. This is not a recommendation — it is code-enforceable and will be caught during final inspection or by a neighbor complaint.

Masonry walls (brick, concrete block, stone) are treated separately and require permits if over 4 feet in height. The distinction matters because masonry over 4 feet must include a footing detail on the permit application, and the frost depth in Union City is 12 inches, meaning footings must extend below 12 inches + 6 inches margin (18 inches total) to prevent heave in winter. If you propose a masonry wall of any height and do not include a footing note, the city will request an engineering stamp or a generic structural standard (like the Georgia Concrete & Masonry Fence Detail Sheet, if the city has one on file). Non-masonry fences (wood, vinyl, metal, chain-link) do not require footing calculations unless they exceed 8 feet or are in a high-wind zone. Union City sits in Climate Zone 3A (warm-humid), not a coastal high-wind area, so wind-bracing is not typically a trigger for residential fences under 8 feet.

Pool barrier rules override all other exemptions. Per IRC AG105 and Georgia Safety Code, any fence or wall intended to completely enclose a swimming pool or spa must have a permit, regardless of height or location. The permit application must include a pool-barrier detail showing: (1) self-closing and self-latching gate with a release mechanism at least 54 inches above the ground, (2) no handholds or footholds on the pool side, (3) no gaps larger than 4 inches in the barrier, and (4) gate hinges that open away from the pool. Union City's Building Department will require a gate-hardware spec sheet (manufacturer's nameplate) and will schedule a footing and gate-function inspection before issuance of a Certificate of Completion. This is non-negotiable and is one of the most common rejection reasons in Union City permit history.

Replacement and like-for-like exemptions are where Union City differs most sharply from neighboring cities. Cumming and some metro-Atlanta jurisdictions allow 'like-for-like replacement' of existing unpermitted fences without a new permit; Union City does not grant this blanket exemption. If your existing fence is unpermitted and you want to replace it at the same height and location, Union City's code officer will ask for proof of the original permit (if none exists, the fence is presumed non-conforming) and will likely require a new permit if the fence is 6 feet or taller or in the front yard. However, if you can produce a valid, decades-old permit, Union City may allow replacement without new permitting (grandfathered status). This is a judgment call, so bring your deed and any old survey or permit paperwork to the counter.

The application process in Union City is straightforward for simple residential fences: fill out a one-page fence permit form (available at the Building Department or online), provide a site plan or sketch showing the property lines, fence location (distance from property line and any easement), height, material, and any pool-barrier details. For non-masonry fences under 6 feet in side/rear yards on non-corner lots, many applications are approved over-the-counter same-day. For masonry, pools, or front-yard fences, plan review may take 3–5 business days. Fees are typically $50–$150 flat (not per linear foot), and the fee is non-refundable even if you don't build. Inspections for non-masonry residential fences are final-only (after the fence is built); for masonry over 4 feet, an inspector will typically visit during footing installation and then at final. Once approved, your permit is valid for 6 months; if construction does not begin within that window, you must renew (usually free, but confirm with the city).

Three Union City fence (wood/vinyl/metal/chain-link) scenarios

Scenario A
5-foot wood privacy fence, rear yard, single-family lot in downtown Union City (non-corner)
You own a 0.4-acre corner lot on the edge of a residential block, but your proposed 5-foot fence is strictly in the rear yard, set back 10 feet from the rear property line. The fence runs parallel to the rear property line and does not cross any sight lines or corner-lot triangles because it is not visible from any street. Wood privacy fence (pine or cedar) at 5 feet is well under the 6-foot threshold for permit exemption. Union City's code officer confirms: no permit required. However, you still need to verify property lines with your deed or a survey if the lot is narrow or if there are any recorded easements (underground utilities, drainage); a survey costs $300–$600 but prevents disputes with neighbors and the city. Your Piedmont clay soil is stable (no unusual subsidence risk), so simple post-hole digging to 24 inches (12-inch frost depth + 12-inch embedment) is sufficient for 5-foot wood posts. Material cost for a 50-foot run of premium cedar with 4x4 posts is $2,500–$4,000; labor (DIY or contractor) is $1,500–$3,000. Total: no permit fees, $4,000–$7,000 total project cost. No inspections required. You can pull the trigger within 2–3 weeks.
No permit required | Property survey recommended (non-mandatory) | 5-foot cedar privacy recommended | Frost depth 12 inches, 24-inch post hole minimum | DIY-friendly | $4,000–$7,000 total | No permit fees
Scenario B
6-foot vinyl fence, front corner lot, Highlands subdivision, Union City (sight-line issue)
You live in the Highlands, a planned community adjacent to downtown Union City where many properties are corner lots. Your property line meets two streets at a 90-degree angle; your intent is a 6-foot white vinyl privacy fence along the front property line to hide your driveway. Union City's sight-distance rule applies: corner lots must maintain a sight triangle (typically 25 feet along each street from the corner) with no obstruction over 3.5 feet in height. A 6-foot vinyl fence directly on the front property line violates this rule and will be flagged during plan review. You have two options: (1) reduce the front fence to 3.5 feet for the 25-foot triangle zone and run the full 6-foot fence behind that point (hybrid fence, but more expensive), or (2) setback the fence 5–8 feet behind the front property line (creates a landscaping buffer but loses privacy). Union City's Building Department will require a site plan with the corner lot surveyed and the sight triangle clearly marked in red. Permit fee: $100–$150. Plan review time: 5–7 business days (because of the sight-line analysis). If you proceed without a permit and the city gets a neighbor complaint, a stop-work order will cost you $200–$500/day in fines plus the cost to remove or lower the fence ($1,500–$3,000). Vinyl fence material for a mixed 50-foot run (3.5 feet + 6 feet sections) is $3,500–$5,500; installation labor is $2,000–$3,500. Recommended total: $50–$150 permit, $5,500–$9,000 project. Inspections: final only, 10–14 days after you call for inspection.
Permit required (front yard + corner lot) | Sight-distance rule applies (25-foot triangle) | Vinyl fence hybrid (3.5ft + 6ft) necessary | Site survey recommended | Permit fee $100–$150 | 5–7 day plan review | $5,500–$9,000 total project | Final inspection only
Scenario C
6-foot chain-link pool barrier, rear yard above-ground pool, Elm Park neighborhood
You are installing a new above-ground swimming pool (12 feet x 20 feet) in your rear yard and want to enclose it with a 6-foot galvanized chain-link fence to meet Georgia Safety Code and your homeowner's insurance requirement. Chain-link at 6 feet for a pool is a classic IRC AG105 pool-barrier scenario and ALWAYS requires a permit, regardless of the fact that it's in the rear yard and would otherwise be exempt. The permit application must include a pool-barrier drawing showing the 6-foot fence line, the gate location, the self-closing and self-latching gate hardware (model and spec), and a footing detail. Union City's frost depth is 12 inches, so chain-link posts must be set at least 18 inches deep. Plan-review rejection is common here if applicants submit without gate specs or footing details, so come prepared with a manufacturer's spec sheet for a gate (e.g., Mighty Mule, Patriot, or similar heavy-duty pool gate). Permit fee: $125–$150. Plan review: 7–10 business days (longer than non-pool fences because of gate compliance). Once approved, footing inspection is required (city inspector observes post holes and concrete before backfill), then gate-function inspection at final (inspector verifies gate closes and latches properly). Timeline: 3–4 weeks from submission to final inspection. Chain-link fence material for a 130-foot pool enclosure (perimeter + interior sections) is $2,500–$4,000; labor is $2,000–$3,500; self-latching gate hardware is $400–$800; concrete footings and labor $1,500–$2,500. Total project: $6,400–$11,000 plus $125–$150 permit fee. If you skip the permit and the city discovers the unpermitted pool fence during a neighbor complaint or utility survey, you face stop-work orders, fines, and insurance denial if a child drowns (liability is severe). This is the scenario where a permit is absolutely non-negotiable.
Permit required (all pool barriers) | IRC AG105 pool-barrier code applies | Self-closing, self-latching gate mandatory | Footing inspection required | Gate-function inspection required | Permit fee $125–$150 | 7–10 day plan review | 3–4 week timeline | $6,400–$11,000 total project

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Corner-lot sight-distance rules and how Union City enforces them

Union City's most distinctive local permitting quirk is its aggressive enforcement of corner-lot sight-distance requirements. The city's zoning ordinance specifies a sight triangle (usually 25 feet along each street frontage from the corner intersection point) in which no fence, wall, vegetation, or other obstruction over 3.5 feet in height is permitted. This rule exists to prevent traffic accidents and reduce liability when a driver's view of oncoming traffic or pedestrians is obscured. The Georgia Department of Transportation has published sight-triangle guidance, but Union City applies it locally, and the city's Building Department treats any permit application on a corner lot as a de facto sight-distance review.

Why this matters to you: if you live on a corner lot in the Highlands, Elm Park, or downtown Union City and want a front-facing fence, the city will require you to produce a site plan that clearly shows the corner triangle (often marked by a surveyor with stakes). If your proposed fence enters that triangle above 3.5 feet, the plan will be rejected unless you redesign. The fee for a professional surveyor to mark a corner triangle is $300–$600, but the city will accept a DIY sketch with a tape measure if you can prove the measurements are accurate (less reliable but cheaper). Violations are enforced by complaint: a neighbor or passing city inspector will report an over-height front fence on a corner lot, and the city will issue a notice to correct. You will have 30 days to remedy (lower the fence, relocate it, or remove it), and if you don't, a fine of $100–$200/day applies.

One workaround: build a stepped or tiered fence where the front (corner-triangle) section is 3.5 feet, and the section behind the sight line is 6 feet. This is more expensive (two fence heights, two sets of posts) but keeps you compliant and preserves privacy where sight lines are not an issue. Union City's plan review is neutral on this; they only care that the fence does not obstruct the sight triangle.

Pool barriers, Piedmont footing, and inspection sequencing

Union City's Piedmont red clay (Cecil soil series) is well-drained but prone to seasonal moisture fluctuation, which means frost heave can shift fence posts if they are not set below the 12-inch frost line. For pool barriers (which are mandatory-permit), footing depth is critical because a sunken or tilted barrier creates a code violation. Union City's Building Department requires that applicants submit a footing detail on the permit drawing (even for chain-link, which is simple: 18 inches minimum depth for posts, 6 inches of concrete below grade). The city will schedule a footing inspection during construction; the inspector will visit after post holes are dug but before concrete is poured, verify depth with a tape measure, and initial the permit.

The inspection sequence for pool fences is: (1) footing inspection (during construction, before concrete), (2) final inspection (after fence is complete and gate is installed), during which the inspector verifies that the gate is self-closing and self-latching, has no gaps, and latches securely. Many applicants fail the final inspection because the gate hinges are installed incorrectly or the latch mechanism is not certified for pool use. Bring the gate hardware spec sheet to the final inspection and be prepared to demonstrate gate closure in front of the inspector. The city will not issue a Certificate of Completion until the gate is code-compliant.

Cost implications: because footing inspection is required, you cannot rush the fence build. After your permit is issued (typically 7–10 days after application), you dig post holes, schedule an inspection (2–3 day turnaround), get clearance, pour concrete, wait 48 hours for cure, then frame the fence. This stretches the timeline to 3–4 weeks from permit issuance to final inspection. If you use a contractor experienced with pool barriers (they will know Union City's requirements), the process is smooth; if you DIY without knowing the inspection sequence, you risk doing the footing wrong and having to dig and redo it.

City of Union City Building Department
Union City, GA (contact city hall for specific street address and mail address)
Phone: Call Union City City Hall main line and ask for Building Department; specific number varies, verify online or via city website | https://www.unioncityga.gov (check for online permit portal or submission instructions)
Monday–Friday, 8:00 AM – 5:00 PM (EST); closed city holidays

Common questions

Do I need a permit to replace my old wood fence with a new one the same height?

Not automatically. If your old fence was under 6 feet, not in the front yard, and your new fence is identical in height and material, Union City may allow replacement without a permit—but only if you can prove the original fence was permitted. If there is no permit on file, the city presumes the old fence was unpermitted and may require a new permit for the replacement if it is 6 feet or taller or in the front yard. Bring any old paperwork to the Building Department to clarify your fence's status before you assume it is exempt.

What is the 12-inch frost depth, and why does it matter for my fence?

Union City sits in USDA Hardiness Zone 3A with a winter frost line of 12 inches. If you bury a fence post less than 12 inches deep, winter freezing and thawing cycles will lift (heave) the post out of the ground over 2–3 years, tilting or toppling the fence. Posts should be set at least 18 inches deep (12 inches frost + 6 inches below for stability). Masonry walls must have footings at least 18 inches deep as well. This is enforced during footing inspection on permitted fences (especially pools) and is why Union City's Building Department requires footing details on permit drawings.

I live on a corner lot. Can I build a 6-foot fence along my front property line?

Only if your fence is outside Union City's sight-distance triangle, which is typically a 25-foot sight line from the corner along both streets. Inside the triangle, fences are limited to 3.5 feet. If your proposed fence enters the triangle above 3.5 feet, the city will require you to either reduce the height in that section or setback the fence behind the triangle boundary. A site survey or professional sight-line analysis (not mandatory but strongly recommended) will clarify where you can build. Expect a permit fee of $100–$150 and 5–7 days of plan review.

Do I need a permit for a vinyl fence under 6 feet in my backyard?

No, vinyl fences under 6 feet in side or rear yards on non-corner-lot residential properties are permit-exempt in Union City. However, confirm that your lot is not a corner lot, that no easement crosses the fence line, and that the fence is truly in the rear or side yard (not visible from the front street). If any doubt exists, contact the Building Department for a quick verbal check (free).

My HOA says I need approval before I build a fence. Do I still need a city permit?

Yes, city permits and HOA approval are separate. You must obtain both. Many homeowners get HOA sign-off first (which can take weeks or months), then pull a city permit. Union City does not require proof of HOA approval on the permit application, but your HOA may require a copy of the city permit before allowing you to build. Start with your HOA, then get the city permit, then build. Skipping either creates liability and resale problems.

What if I build a fence without a permit and the city finds out?

Union City will issue a stop-work order and fines of $200–$500 per day until the fence is brought into compliance or removed. If the fence is unpermitted but otherwise code-compliant (right height, right location), you may be able to apply for a retroactive permit (fee typically doubled, $100–$300), but this is discretionary. If the fence violates code (too tall, too close to property line, or a pool barrier without proper gate), the city will require removal. Unpermitted fences also must be disclosed when you sell your home, which can cost you $2,000–$8,000 in buyer demands or price reduction.

Is there a difference between a fence and a wall for permit purposes?

Yes. Fences (wood, vinyl, metal, chain-link) under 6 feet are often permit-exempt; walls (masonry, concrete block, brick, stone) over 4 feet require permits and must include engineering or structural details. A masonry wall at 5 feet requires a permit even if a 5-foot fence does not. If you are considering a masonry wall, plan for a longer review timeline (10–14 days) and a footing inspection. Masonry walls also may require an engineer's stamp if the design is non-standard.

How long does it take to get a fence permit in Union City?

For a simple residential fence under 6 feet in a side or rear yard on a non-corner lot (with all details correct), the permit may be issued same-day or within 1–2 business days. For front-yard or corner-lot fences, plan 5–7 business days. For pool barriers or masonry, 7–10 business days. Once issued, the permit is valid for 6 months; if you don't start construction within that window, you must renew (usually free, but confirm). Total timeline from application to final inspection: 2–4 weeks depending on complexity.

Do I need an engineer for a vinyl or wood privacy fence?

Not for a standard residential fence under 8 feet in Union City's climate zone. Chain-link and masonry walls over 4 feet may require an engineer's stamp or a footing detail, but vinyl and wood privacy fences are treated as routine residential construction. If your fence is unusually tall (8+ feet), in a high-wind zone, or supporting a significant load, bring it to the Building Department for a pre-application chat; they can tell you if an engineer is needed (unlikely, but possible).

What fees should I expect for a Union City fence permit?

Residential fence permits in Union City are flat-fee, not calculated per linear foot. Expect $50–$150 depending on scope: simple rear-yard fences under 6 feet are typically $50–$75; front-yard or corner-lot fences are $100–$125; pool barriers and masonry are $125–$150. Fees are non-refundable even if you decide not to build. Some cities allow you to pay the permit fee and reuse the permit if you don't build within the validity period; verify this with Union City's Building Department.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current fence (wood/vinyl/metal/chain-link) permit requirements with the City of Union City Building Department before starting your project.

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