Bathroom Remodel Permit in Decatur, GA (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Decatur requires a permit if you're relocating any plumbing fixture, adding electrical circuits, converting tub to shower, installing a new exhaust fan, or moving walls. Surface-only work—replacing a toilet, vanity, or faucet in place—does not require a permit.

Decatur's Building Department has adopted the 2020 International Building Code (Georgia's baseline), but Decatur's local code specifically requires permits for any bathroom work that alters the plumbing distribution system, electrical service, or structural envelope. Unlike some neighboring jurisdictions (such as nearby Atlanta, which processes permits through a larger citywide system), Decatur maintains a smaller, more responsive permitting office that often completes plan reviews for bathroom remodels in 5–7 business days if the submission is complete. Decatur does not have a blanket exemption for bathroom remodels under a certain valuation—the trigger is the type of work, not the cost. If you're only swapping out a toilet or faucet in the same rough-in, you don't need a permit. But if that toilet swap involves moving the drain rough-in location or replacing the wax ring with a new cast-iron closet flange, you've crossed the threshold. The city's online permit portal (managed through the City of Decatur website) allows e-filing of applications, though many contractors still file in person or by PDF email to expedite review.

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

Decatur Building Department issues stop-work orders on unpermitted bathroom work, typically accompanied by a $300–$500 fine, plus mandatory permit fees calculated at double the normal rate when you eventually file.
Insurance claims for water damage, mold, or structural failures in an unpermitted bathroom are routinely denied by homeowners policies; you'll absorb the cost of remediation out of pocket.
Sale of your home triggers a title search; buyers' lenders require disclosure of unpermitted work (Decatur ties permits to property records), and many lenders will not fund a purchase until the work is permitted and inspected retroactively—or removed entirely.
Refinancing or HELOC applications are blocked if the lender's appraisal flags unpermitted bathroom improvements; expect delays of 2–6 months while you scramble to retroactively permit or remove the work.

Decatur bathroom remodel permits—the key details

Decatur requires a Building Permit (not just an Electrical or Plumbing sub-permit) for any bathroom remodel that involves fixture relocation, structural changes, or new electrical circuits. The city's adoption of the 2020 IBC means you're subject to IRC P2706 (drain fittings and trap sizing), IRC M1505 (bathroom exhaust fan CFM and ductwork termination), IRC E3902 (GFCI protection on all 120V circuits within 6 feet of the sink), and IRC R702.4.2 (waterproofing system specification for tub and shower enclosures). Decatur does not have a local override on these sections; they apply as written. The permit application requires a set of architectural and MEP (mechanical, electrical, plumbing) plans, though for a simple fixture relocation in a small bathroom, the city often accepts a 1/4-inch scale floor plan with noted fixture locations, rough-in heights, and drain run specifications rather than full construction documents. The application fee is based on the estimated project cost; Decatur uses a sliding scale that typically ranges from $200 for a $5,000 remodel to $800 for a $30,000+ remodel, calculated at roughly 3–4% of the stated contract value for work valued under $100,000.

One of Decatur's unique requirements is its specific language on shower waterproofing systems. The city's Building Department, in its permit guidance, explicitly requires that any tub-to-shower conversion or new shower enclosure specify the waterproofing assembly in writing on the plans: cement board + liquid membrane (Redgard or equivalent), or kerdi system, or analogous third-party-certified product. Vague language like 'waterproof drywall' will trigger a plan-review rejection because the city wants to avoid the mold liability that arises from inadequate waterproofing in Georgia's warm-humid climate (Zone 3A). This is especially critical in Decatur because of the city's age (many homes pre-1978 with potential lead paint) and its high home values; the city's inspectors are vigilant on waterproofing specs to prevent costly post-occupancy failure claims. Additionally, Decatur requires that any new exhaust fan duct be hard-piped to the exterior (not terminating in an attic or crawlspace), and the ductwork termination location must be shown on the plans with the exit cap and exterior wall elevation noted.

Decatur's permitting process is tiered. The first submission is plan review, which takes 5–7 business days under normal conditions. If the plans are incomplete (missing waterproofing specs, GFCI diagram, or trap-arm calculations), the city issues a Request for Information (RFI), and the clock restarts. Once approved, you receive a permit card and can schedule rough-in inspections: rough plumbing (drain-waste-vent system), rough electrical (circuits, GFCI breaker or GFCI receptacles, ventilation fan wiring), and framing/blocking (if walls are being opened). Final inspection happens after all fixtures are installed, caulking is complete, and ventilation is tested. The entire process from application to final sign-off typically takes 3–5 weeks if there are no major scope changes. If you hire a licensed Georgia plumber or electrician, they often handle the permit filing; if you're the owner-builder, Georgia Code § 43-41 allows you to pull a permit and do the work yourself, but you must pass all inspections and comply with code—Decatur's inspectors do not give owner-builders a discount on scrutiny.

Decatur has a strong historic-district overlay covering much of the downtown and midtown areas. If your property is in the Historic District (which you can verify on the city's GIS map or by calling the Planning Department), your bathroom remodel may require Historic Preservation Board (HPB) approval before the building permit is issued, especially if exterior changes (new exhaust fan duct exit, window removal, exterior wall changes) are involved. This adds 2–3 weeks to the timeline. Interior-only remodels in the historic district typically bypass HPB review, but the Building Department will flag your permit application if your property is flagged in the system. Know your status before you submit.

Lead-paint testing and remediation are mandatory for any bathroom in a home built before 1978 in Decatur (per federal EPA regulations and Georgia law). If your home was built pre-1978 and you're disturbing paint—even during a simple tile demo or wall removal—you must hire an EPA-certified lead-safe practices contractor or obtain a waiver from the property owner. Decatur's Building Department does not enforce lead-paint compliance (that's EPA and Georgia Department of Public Health), but your contractor is liable, and your permit application should include a Lead-Safe Practices Acknowledgment or a copy of the lead inspection report. This is not a permit delay, but it is a cost: expect $300–$500 for a lead-safe assessment if you're unsure.

Three Decatur bathroom remodel (full) scenarios

Scenario A

1970s ranch home in Druid Hills, second-floor bathroom: moving toilet and sink to opposite wall, keeping tub in place, adding new exhaust fan with duct to roof

Your home is in the Druid Hills historic district, built in 1968, so you'll need to verify if any exterior changes (the new exhaust fan duct penetration on the roof) require Historic Preservation Board sign-off—call the Planning Department before filing. The permit will require a floor plan showing old and new toilet and sink locations (with rough-in dimensions: toilet 12 inches from the new wall, sink 18–24 inches high on the new wall), a plumbing schematic with drain-run lengths (the code limits trap-arm length to 2.5 feet for a 1.5-inch drain, so if your new toilet drain runs more than 2.5 feet from the stack, you'll need a separate vent or a studor vent—this is a common rejection in remodels, so measure carefully), and the new exhaust fan CFM spec (typical 50–80 CFM for a ~40-square-foot bathroom, but Decatur requires proof that it meets IRC M1505). You'll also note that the tub is staying in place with existing plumbing; if the tub surround is being retiled, you'll specify the waterproofing system (e.g., 'existing surround removal, cement board backer, Redgard liquid membrane, new tile'). The permit fee will be roughly $400–$600, based on an estimated project cost of $12,000–$18,000. Plan review will take 5–7 days; if the trap-arm calculation is missing, you'll get an RFI and another 5 days. Inspections: rough plumbing (1 day), rough electrical (1 day), final (after tile, fixture install, exhaust fan duct seal). Total timeline 4–6 weeks. The lead-paint issue is significant here: the 1968 build date triggers EPA lead-safe practices requirements for paint disturbance. Budget $400–$600 for lead-safe demo (encapsulation, HEPA vacuuming, disposal) if you're removing drywall or tile.

Scenario B

2008 townhome in downtown Decatur: full gut-and-remodel of main-floor powder room, converting 3x5 space into ADA-accessible half-bath with new shower (tub removal), relocating vent stack, adding 20-amp dedicated circuit for GFCI

This is a complex permit because it involves structural (vent stack relocation, wall opening), plumbing (tub removal, new drain for shower, new trap and vent routing), electrical (new 20-amp GFCI circuit), and waterproofing changes. The permit application must include a full architectural floor plan (showing before and after), a plumbing isometric diagram (showing the new vent stack route, shower drain pitch, trap location, and vent termination—this is NOT shown on the floor plan and is often the reason for RFIs), an electrical one-line diagram (showing the new 20-amp circuit, GFCI breaker location, and receptacle placement), and a waterproofing detail drawing for the shower enclosure (specify the product: Schlüter-Kerdi, or cement board + Redgard, or equivalent). The tub removal triggers lead-paint testing if the home has any pre-1978 components (your 2008 townhome is post-lead-paint era, so no EPA requirement here). Decatur's Building Department will require a framing inspection once the vent stack is relocated, to verify blocking for the new duct and proper support. The permit fee will be $600–$900, based on a $20,000–$30,000 project valuation. Plan review: expect 7–10 days because of the vent-stack rework (the code-reviewer will check vent sizing, pitch, and termination height above the roofline). Rough inspections: plumbing (vent and drain), electrical (circuit and GFCI), framing (stack support). Final: after waterproofing inspection (often a separate item), tile, and fixture installation. Total timeline 5–8 weeks. Downtown location: verify zoning for any exterior duct work if the vent terminates on an exposed wall (Decatur's Historic District guidelines may restrict visible ductwork).

Scenario C

2015 ranch in Oakhurst neighborhood: simple vanity and toilet replacement in existing locations, new wall-hung medicine cabinet, regrouting existing tile floor—no plumbing or electrical relocation

This is surface-only work. Decatur does not require a permit for vanity swaps, toilet replacements (in the same rough-in location), or cosmetic tile work. The key is: are you moving the drain? If the new toilet connects to the existing closet flange location (typically 12 inches from the finished wall), and you're reusing the wax ring hole, no permit is needed. If you're moving the flange or the sink drain to a new location, you cross the permit threshold. In your scenario, you're keeping the toilet and sink rough-ins unchanged, swapping the fixtures themselves, and replacing grout on existing tile—none of this requires a permit. However, if the medicine cabinet requires wall anchors that penetrate blocking or studs in a way that affects the bathroom's structural integrity (e.g., you're bolting it to studs in a way that compromises fire-blocking), the inspector might flag it at final walk-through, but you won't need a permit to do the work. The toilet swap does require a modern wax ring rated for your floor type (ceramic, vinyl, or wood) and proper bolts; the vanity swap requires that you properly secure it to wall studs and ensure P-trap and drain lines are properly pitched (minimum 1/4 inch per foot toward the main vent stack). If you disturb any drywall, tape, or joint compound during tile removal, and your home was built pre-1978, lead-paint safe practices apply—budget $200–$400 for a lead-safe assessment. No permit fee. No inspections. Timeline: your own schedule, no city involvement.

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Decatur's warm-humid climate and bathroom waterproofing: why the city is strict

Decatur sits in Climate Zone 3A (warm-humid), which means high moisture levels and thermal swings that encourage mold growth if bathrooms are not properly waterproofed. The Piedmont red-clay soil (Cecil series) and underlying granite also create drainage challenges on sloped sites; bathwater that leaks through inadequate shower waterproofing can seep into the foundation and crawlspace, causing mold, structural damage, and costly remediation. Decatur's Building Department has seen dozens of post-occupancy mold failures in bathrooms over the past 15 years, and the city's inspectors are now very explicit: they will not sign off on a shower enclosure unless the waterproofing system is detailed on the plans and then visually inspected before drywall is closed.

The IRC standard (R702.4.2) requires that any shower enclosure or tub surround be waterproofed to a height of 6 feet above the finished floor, using materials that can tolerate chronic moisture exposure. Decatur's Plan Review Section interprets this strictly: cement board alone (without a liquid membrane or sheet membrane behind it) is not acceptable; you must specify either a two-part system (cement board + Redgard or equivalent liquid membrane) or a single-product system (Schlüter-Kerdi, Wedi, or approved equal). During rough inspection, the inspector will verify that the waterproofing membrane is properly adhered, overlapped, and extended behind the mixing valve and up to the rim of the tub or threshold of the shower pan. If you skip this step or assume drywall + caulk is sufficient, the inspector will reject the rough, and you'll have to open the wall and redo it—an expensive change order.

For a full bathroom remodel in Decatur's climate zone, budget an extra $400–$600 for a premium waterproofing system and professional installation. Many contractors use Redgard (a liquid-applied membrane) because it's forgiving and quick-drying, and it costs $150–$250 in materials for a typical shower enclosure. Kerdi systems (sheet-based, with sealed corners and penetrations) cost $300–$500 and require more precision in installation but are more durable. Either way, your permit plans must specify the system name and thickness (Kerdi thickness is typically 6mm; Redgard is typically 50–70 mils). The city's inspectors have seen both systems work well when installed properly; they're not brand-loyal, but they are specification-dependent.

Permit timeline, inspection sequence, and the role of licensed trades in Decatur

Decatur allows owner-builders to pull permits under Georgia Code § 43-41, but the city's inspectors hold owner-builders to the same standard as licensed contractors. If you are the property owner and you want to do the plumbing or electrical yourself, you must be present at inspections and prepared to explain your work. Most owner-builders hire a licensed plumber and electrician for the complex parts (drain/vent routing, circuit installation) and handle the cosmetic finishes (tile, painting, fixtures) themselves. A licensed Georgia plumber (GAPCO #) can pull a plumbing sub-permit and handle the drain-waste-vent system and fixture rough-ins. A licensed electrician can pull an electrical sub-permit and handle the new circuit and GFCI installation. The building permit ties all the trades together and includes the final inspection.

The standard inspection sequence for a full bathroom remodel is: (1) plumbing rough-in (drain-waste-vent and hot/cold water lines), (2) electrical rough-in (new circuit, GFCI breaker or receptacles, exhaust fan wiring), (3) framing inspection (if walls are opened, to verify blocking for exhaust fan duct and structural integrity), (4) drywall inspection (often skipped if no framing changes), (5) final inspection (after all fixtures, tile, caulk, and exhaust fan are installed and tested). Each inspection is scheduled through the city's online portal or by phone; inspectors typically arrive within 24–48 hours of the request. Decatur's inspectors often spot-call the work (they may not show up on the exact time you request, but they will respond within 2 business days). If you fail an inspection, you have 5 business days to correct the issue and request a re-inspection at no additional fee.

The city publishes a permit checklist on its website (verify the current URL with the Building Department); it specifies exactly which plan sheets are required for a bathroom remodel. A typical checklist includes: floor plan (1/4 inch scale, showing before and after fixture locations, dimensions, and finish materials), plumbing schematic (isometric or single-line, showing trap locations, vent routing, fixture rough-in heights), electrical one-line (showing new circuit, GFCI location, exhaust fan circuit, lights and switches), and a waterproofing detail (for any shower or tub work). If you file incomplete plans, the RFI cycle delays you 5–7 days. Many contractors use an architect or permit expediter to prepare the plans; the cost is $300–$800, but it often saves the RFI cycle and gets you to permit issuance faster.

City of Decatur Building Department
509 North McDonough Street, Decatur, GA 30030
Phone: (404) 371-4500 (main city line; ask for Building Department) or check decaturg.com for direct building inspection line | Permit applications and status: visit decaturg.com and search 'building permits' or 'online portal' (as of 2024, Decatur uses an online filing system; confirm the exact URL on the city website)
Monday–Friday, 8:00 AM–5:00 PM (EST); plan review by appointment or drop-off

Common questions

Do I need a permit if I'm just replacing my toilet and vanity in the same location?

No. A toilet swap or vanity replacement in the existing rough-in location is not a permit-triggering event in Decatur. If you're keeping the toilet flange and sink drain in the same spot, you can simply uninstall the old fixtures and install new ones. However, if your home was built before 1978, lead-paint safe practices apply during any disturbance of drywall, paint, or trim. New wax ring, proper bolts, and secure vanity anchoring are required by code, but no permit or inspection is needed.

My bathroom remodel involves moving the toilet to a different corner. Do I need a permit?

Yes. Moving a toilet (or any plumbing fixture) to a new location requires a full Building Permit in Decatur. You'll need to file plumbing plans showing the new closet flange location (standard 12 inches from the finished wall), the drain run to the main stack, and vent routing. The code limits trap-arm length to 2.5 feet for a 1.5-inch drain without a secondary vent, so your plans must verify this or specify a vent solution. Permit fee is $300–$700 depending on project scope. Plan review: 5–7 days. Rough inspection: plumbing only (vent and drain). Timeline: 3–5 weeks.

What is a trap-arm length, and why does Decatur care about it?

A trap-arm is the pipe section between the P-trap under a sink or toilet and the main vertical vent stack. Code (IRC P2706) limits trap-arm length to 2.5 feet for a 1.5-inch drain and 3 feet for a 2-inch drain without a secondary vent. If your new toilet or sink drain is farther from the main stack than these distances, the drain will not vent properly, and siphoning or slow drainage will occur. Decatur's inspectors verify trap-arm length on the plumbing plan during review; if you exceed the limit without a secondary vent, the plan is rejected. This is one of the top rejection reasons for bathroom remodels in the city, so measure and calculate carefully, or hire a plumber who understands code.

Do I need a permit for a new exhaust fan in my bathroom?

Yes, a new exhaust fan installation requires a Building Permit in Decatur, specifically a plumbing sub-permit (because it involves the ventilation system). The permit requires that the ductwork be hard-piped to the exterior (not venting into the attic or crawlspace), the duct termination be shown on the plans with the roof or wall exit cap noted, and the fan CFM rating match the bathroom size (typically 50–80 CFM for a 40–60 square-foot bathroom, per IRC M1505). The permit fee is typically $200–$300 if the fan is the only work; if it's part of a larger remodel, it's bundled into the main permit fee. Plan review: 5 days. Inspection: rough (before drywall closes) and final (after duct is sealed and fan is operational).

What if my bathroom is in Decatur's historic district? Does that change the permit process?

Yes. If your property is in the Decatur Historic District (Downtown, Midtown, or Old Decatur overlay), exterior changes (such as a new exhaust fan duct penetration or window removal) may require Historic Preservation Board (HPB) approval before the building permit is issued. Interior-only remodels typically do not require HPB review. Before you file, check your property status on the city's GIS map or call the Planning Department at (404) 371-4500. If HPB approval is needed, the timeline adds 2–3 weeks. The HPB usually approves exhaust fan ducts if they are routed discreetly (e.g., on a rear or side roof slope, not the street-facing facade). File a sketch of the duct location with your Historic Preservation application.

Does a shower waterproofing detail matter for the permit, or can I just do it during construction?

It matters. Decatur requires that any new shower enclosure or tub-to-shower conversion specify the waterproofing system on the permit plans (e.g., 'cement board backer, Redgard liquid membrane, new ceramic tile'). The inspector will verify during rough inspection that the membrane is installed correctly before drywall is closed. If you don't specify the system on the plans, the inspector will issue an RFI, and you'll have to revise and resubmit. Once approved, you must install the exact system shown; if you deviate (e.g., you use drywall instead of cement board), the inspector will reject the rough. This spec is non-negotiable in Decatur due to the warm-humid climate and past mold issues. Budget an extra 3–5 days for the waterproofing system installation.

My home was built in 1975. Do I need to worry about lead paint during the bathroom remodel?

Yes. Any home built before 1978 is presumed to have lead-based paint. If your bathroom remodel involves disturbing paint, drywall, trim, or tile (which most full remodels do), you must either hire an EPA-certified lead-safe practices contractor or obtain a lead-inspection/risk-assessment report from a certified professional. The contractor or you must use containment, HEPA vacuuming, and proper disposal during demo. Decatur's Building Department does not enforce lead-paint compliance directly, but your contractor is liable under federal law, and your homeowner's insurance may deny claims if lead-safe practices were not followed. Budget $300–$600 for a lead-inspection and remediation plan, or hire a certified lead-safe contractor (add 20–30% to labor costs). Verify your home's age before you start; if it's post-1978, you can skip this step.

Can I do the work myself, or do I need to hire a licensed plumber and electrician?

Georgia law (Code § 43-41) allows owner-builders to pull permits and do their own work on their primary residence, including plumbing and electrical, provided they pass all required inspections. Decatur's inspectors will hold you to the same code standard as a licensed contractor. Many homeowners hire a licensed plumber for the drain-waste-vent system and fixture rough-ins (because these are code-critical and easy to get wrong) and a licensed electrician for the new circuit and GFCI installation, then handle tile, painting, and fixture finishes themselves. A licensed plumber costs $60–$100/hour; a full bathroom rough-in typically takes 8–16 hours ($500–$1,600). If you do the work yourself, you save labor but assume all liability for code compliance. Either way, you must pass the inspections to get final sign-off.

What if the inspector fails my bathroom rough inspection? How long does it take to fix and re-inspect?

If the inspector finds code violations during the rough plumbing, electrical, or framing inspection, they will issue a written notice describing the deficiencies. You have 5 business days to correct the issue (e.g., re-route a vent line, adjust a trap-arm length, or relocate a GFCI receptacle). Once corrected, you request a re-inspection through the city's online portal or by phone; the inspector will schedule within 2 business days. Re-inspections do not carry an additional fee. Most rough-inspection failures are quick fixes (a few hours of rework), but some—like a trap-arm that's too long and requires a secondary vent—can require a 1–2 day delay while the trades coordinate. Plan for the possibility of one re-inspection cycle (5–7 additional days) when budgeting your timeline.

How much will the permit cost for my bathroom remodel?

Decatur's permit fee is based on the estimated project cost, using a sliding scale of roughly 3–4% of the contract value for work valued under $100,000. A small remodel (vanity and toilet swap, $5,000–$8,000 estimated value) costs $200–$300 in permit fees. A mid-range remodel (fixture relocation, new tile, new fixtures, $15,000–$20,000 estimated value) costs $450–$700 in permit fees. A high-end remodel (full gut, waterproofing, new electrical, $30,000–$50,000 estimated value) costs $800–$1,500 in permit fees. The city does not charge separate sub-permit fees if you hire a licensed plumber or electrician (their licensing covers the work under the main building permit). If you need a plan-review revision or an RFI correction, there is no additional fee; you simply resubmit the revised plans.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current bathroom remodel (full) permit requirements with the City of Decatur Building Department before starting your project.

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