Baton Rouge, LA
Baton Rouge Plumbing Permit Cost
Baton Rouge prices plumbing trade permits the way it prices electrical:
residential plumbing permits are a flat $125.00, and commercial plumbing permits are flat by construction valuation — $125 up to $100,000, $300 to $500,000, $400 to $2,000,000, and $600 above it. The $25.00 technology fee rides every permit.
How this fee is calculated
These are the components the schedule defines for this permit, as they applied on 2026-09-28. A component only applies to your project if its conditions match — read that column before assuming a figure. Want a figure for your own project? Estimate this fee with the permit fee calculator.
| Component | Formula | Applies when | Range |
|---|---|---|---|
| Commercial plumbing trade permit (flat by valuation: $125/$300/$400/$600)Permit fee | Project valuation — $125.00 up to $100,000; $300.00 from $100,000 to $500,000; $400.00 from $500,000 to $2,000,000; $600.00 above $2,000,000 | Occupancy is one of commercial, industrial, mixed | — |
| Residential plumbing trade permit ($125.00)Permit fee | $125.00 flat fee | Occupancy is residential | — |
| Technology fee ($25.00)Technology fee | $25.00 flat fee | Every permit of this type | — |
A real permit fee is these components added together. The department’s final calculation is the one that applies — this is the schedule it will be based on.
A worked example
Follow the arithmetic by hand. Every line is produced by the engine from the rules above, so the total cannot drift away from the schedule behind it.
Worked example
A residential plumbing trade permit in Baton Rouge for a bathroom remodel (no building permit required for the trade scope).
| Input | Value |
|---|---|
| Project valuation | $15,000 |
| Fixtures | 5 |
| Occupancy class | Residential |
| Type of work | Alteration |
Example total
$150.00
An estimate, not an official fee. It is calculated from the published fee schedule as it applied on 2026-09-28. The permit office’s own calculation is the one that applies, and your project may fall under rules this schedule does not describe.
Fee schedule as of 2026-09-28Rules applied 2Rules considered 3
| Component | How it is calculated | Amount |
|---|---|---|
Residential plumbing trade permit ($125.00)Permit feePermit & Inspection Fees, Residential: Residential Mechanical, Electrical or Plumbing, Gas Trade Permits — $125.00 each.Show the working
| $125.00 flat fee | $125.00 |
Technology fee ($25.00)Technology feePermit & Inspection Fees, All Permits: Technology Fee $25.00, charged on every permit the Department issues.Show the working
| $25.00 flat fee | $25.00 |
| Total | $150.00 |
Fees that do not apply here
Listed so you can see what was considered and left out, rather than wondering whether something is missing. A rule can also be left out because it is not published for this permit at all, and that is stated where it matters.
- Commercial plumbing trade permit (flat by valuation: $125/$300/$400/$600) — This fee does not apply to the inputs provided.
Assumptions
- Calculated from 2 fee rules in effect on 2026-09-28.
- Amounts are rounded to the nearest cent, once, at the end of each component.
Residential trade permit: flat $125.00. Technology fee: $25.00. Total: $150.00.
What is different in Baton Rouge
Plumbing trade permits are pulled by the licensed plumber under the Inspection & Permits division. East Baton Rouge Parish runs its own sewer system inside the Sewer Impact Fee regime, so new connections also trigger the separate impact-fee schedule; the trade permit here covers the inspection of the piping work itself. Residential gas piping shares the same flat $125 trade row.
What this figure does not include
Impact fees, utility connections and other departments’ permits are the usual omissions, and in some jurisdictions they are larger than the permit fee itself.
Not included in these figures
This estimate covers the City-Parish plumbing trade permit and technology fee only. It excludes:
- Sewer impact fees and traffic impact fees, published as separate schedules.
- Sewerage tap and connection charges for new or upsized services.
- The building permit for the same project.
- State plumbing licensing and city-parish occupational licenses.
- Septic system permits outside the sewer service area.
What you need before applying
- State plumbing licenseRequired
Plumbing work requires a state-licensed plumber pulling the trade permit; the residential plumbing trade permit is a flat $125 and the commercial permit is priced by valuation band.
Common questions
How much is a residential plumbing permit in Baton Rouge?
A flat $125.00, plus the $25 technology fee — the same flat row covers residential mechanical, electrical, plumbing and gas trade permits.
Baton Rouge Permit & Inspection Fees
How much is a commercial plumbing permit in Baton Rouge?
Flat by construction valuation: $125 up to $100,000, $300 from $100,001 to $500,000, $400 to $2,000,000, and $600 above that, plus the $25 technology fee.
Baton Rouge Permit & Inspection Fees
Are plumbing fixtures counted for the fee in Baton Rouge?
No. The schedule prices plumbing work flat by job size — there is no per-fixture or per-outlet rate anywhere on the city-parish schedule.
Baton Rouge Permit & Inspection Fees
Does Baton Rouge charge sewer impact fees?
Yes, but separately: the Sewer Impact Fee Schedule is its own document, charged on connections to the parish sewer system rather than on the plumbing trade permit.
Baton Rouge Permit & Inspection Fees
Is gas piping permitted on the same plumbing permit?
Yes. The residential 'Mechanical, Electrical or Plumbing, Gas Trade Permits' row is one $125 line covering each trade, so gas piping is permitted at the same flat amount.
Baton Rouge Permit & Inspection Fees
What is the technology fee on my permit?
A $25.00 flat fee charged on every permit — building, trade, occupancy and demolition alike — listed under 'All Permits' on the schedule.
Baton Rouge Permit & Inspection Fees
How much is a reinspection in Baton Rouge?
$75.00 per reinspection, and $150.00 for after-hours inspections.
Baton Rouge Permit & Inspection Fees
Source and verification
The documents behind every figure on this page, with the dates that make them checkable.
- City websiteCityPrimary source
City-Parish of Baton Rouge — Permit & Inspection Fees (Department of Development)
The operative fee schedule. Residential: $0.80/sq ft + $125 ($125 min new, $250 min remodel/addition/accessory), trade permits $125 flat. Commercial: valuation bands $5/$4/$1.50 per $1,000 chaining at $100,000 and $500,000, $100 minimum; plan review $3/$1,000 to $500k then $1,500 + $0.50/$1,000, $100 minimum; MEP trades flat by valuation band ($125/$300/$400/$600). Technology fee $25 on every permit; reinspection $75; credit cards +5%. The page prints no effective date — the read date is carried.
Verification
Last verified against the official source in Sep 2026.