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How Much Does a Building Permit Cost in Baltimore?
✓ Fee schedule checked against city sources
Fee math from Department of Housing and Community Development (DHCD), City of Baltimore, not a national average
Source: Department of Housing and Community Development (DHCD), City of Baltimore · Fee schedule source ↗
Data last verified: September 26, 2026
Every Baltimore permit is priced on its own: the fee rounded to the nearest dollar with a $25 minimum, plus the 5% permit tax and the application fee ($25 without plan review, $125 with). Interior alterations are $0.30 per affected square foot with a $50 minimum, not project value, and each trade on a remodel is its own permit.
Permit Cost by Project
Bathroom Remodel$182.00
Kitchen Remodel$182.00
Siding Replacement$130.00
Window Replacement$109.00
Deck / Patio$78.00
HVAC Replacement$57.00
Electrical Panel$57.00
Water Heater$52.00
Fence Permit$52.00
Solar Panel Installation$52.00
EV Charger Installation$52.00
Electrical Permit$52.00
Plumbing Permit$52.00
HVAC / Mechanical Permit$52.00
Do You Need a Permit?
No: Paint, cosmetic updates, fixture swaps
Yes: Bathroom remodel ($182.00)
Yes: Kitchen remodel ($182.00)
Exempt: Roof replacement
Yes: HVAC replacement ($57.00)
Yes: Water heater ($52.00)
Yes: Deck / patio ($78.00)
Yes: Window replacement ($109.00)
Yes: Electrical panel ($57.00)
Yes: Solar panels ($52.00)
Verified Permit Cost by Project Type
Bathroom Remodel
$182.00
Electrical, Plumbing, Mechanical
Kitchen Remodel
$182.00
Electrical, Plumbing
Siding Replacement
$130.00
Building
Window Replacement
$109.00
Building
Deck / Patio
$78.00
Building
HVAC Replacement
$57.00
Mechanical
Electrical Panel
$57.00
Electrical
Water Heater
$52.00
Plumbing
Compare these permit costs across U.S. cities
Two Types of Permits
Baltimore issues building permits for structural work and separate trade permits for plumbing, electrical, HVAC, and roofing. Most remodels need both kinds. See the full breakdown of which projects need a permit and which are exempt.
Baltimore Permit Cost Calculator
Choose a common project or enter a project value to estimate local permit fees from Department of Housing and Community Development (DHCD), City of Baltimore data.
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Published local schedule
Permit scope
Permit not required
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Baltimore calculator ready. Select a project to update the local permit estimate.
Estimated permit fee
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Updates instantly when project type or valuation changes.
✓ Verified local fee schedule
✓ Exempt: replacing roof shingles or tarring needs no permit (105.2 items 17-18). Structural roof work is not exempt (then a $10 per $1,000 exterior-alteration permit plus 5% tax).
Local sourceBuilt from Department of Housing and Community Development (DHCD), City of Baltimore fee data, not a national average.
Formula-backedValuation-based projects recalculate from the local fee formula.
Bookmark friendlyThe tool lives on this city page so citations and saved links stay stable.
Baltimore prices every permit on its own: the fee, rounded to the dollar with a $25 minimum under Section 109.3, plus the 5% Building Code permit tax under Section 109.7 rounded up, plus the $25 application fee under Section 109.5.7. A small trade permit runs $52 all-in and a central AC replacement $57. Most cities tie fees to project value. Baltimore doesn't for interior work.
How Baltimore Calculates Permit Fees
Baltimore uses a separate trade permit system. You pull individual permits for building, electrical, plumbing and mechanical work. Every permit carries an extra 5% Building Code permit tax per Section 109.7, rounded up to the whole dollar, and its own nonrefundable application fee. I pulled this from the 2024 Edition of the Baltimore City Building Code.
Interior alterations don't use project value. They charge $0.30 per affected square foot with a $50 minimum. Any room of 168 square feet or less sits at that floor ($0.30 x 168 = $50.40, which rounds to $50 under Section 109.3), so the building permit runs $78 all-in. Add a plumbing permit ($52 all-in for three fixtures) and an electrical permit ($6 a circuit, so $52 all-in at the $25 floor for up to four circuits), and a kitchen or bath remodel comes to $182. The building fee doesn't scale with your finishes.
Add a nonrefundable application fee too. That runs $25 without plan review or $125 with it. Every permit has a $25 minimum under Section 109.3, so a small trade permit runs $52 all-in: $25, $2 of tax and the $25 application fee. A simple water heater changeout totals $52. A furnace-and-AC swap lands at $88. (Locking these down meant three PDFs plus the local amendments in Ord. 24-341.)
The online calculator on this page already factors in the 5% tax and application fee. Not cheap. But predictable once you know the square foot rule.
Chuck's Take
"I bid jobs in Missouri. When a homeowner says the permit is cheap I always ask what system they use. Baltimore's square foot method beats valuation games in other cities. You won't get surprised by high end finishes bumping your fee. Still budget the 5% tax though. Nobody likes that add on."
Leonard "Chuck" Thompson, LC Thompson Construction Co.
What Needs a Permit in Baltimore?
You need a permit for most structural changes in Baltimore. Replacing roof shingles or tarring gets exempted under Section 105.2. Same for interior drywall repair and painting.
A bathroom remodel needs permits. So does a kitchen. Electrical panel upgrades require their own permit. Same for new HVAC or water heater swaps. You don't need one for cosmetic finishes. But you do for anything that touches wiring, pipes or load bearing walls.
A one-story detached shed of 120 square feet or less needs no permit, per DHCD's Work Exempt From Permit list. Decks almost always need review. Same for finishing a basement. Don't assume. Baltimore code enforcement finds unpermitted work through neighbor complaints and property sales.
They won't look the other way. The work must still meet code even if you skipped the permit. That creates real problems later.
What Happens If You Skip the Permit in Baltimore?
Baltimore doubles down on unpermitted work. A permit issued for work begun without one carries a penalty surcharge of the greater of $1,000 or 50% of the permit fee under Section 109.5.9. The 5% Building Code permit tax still applies.
The city can require you to tear out work that doesn't pass inspection. Nobody wants that bill. Property sales get messy too. Title companies flag missing permits.
I spent hours digging through the enforcement sections of the 2024 Baltimore City Building Code. The rules aren't vague. They just aren't convenient. Pull the permits up front. The hassle beats the alternative.
How Long Is a Building Permit Good For in Baltimore?
Baltimore permits don't last forever. Under Section 105.5.1 a permit expires if work doesn't begin within 180 days of issuance or stops for 180 days. An extension must be requested within 90 days after expiration and runs up to 180 days at a time. Renewal isn't automatic.
The exact clock starts at issuance. Check your approval paperwork for the precise date. DHCD won't chase you but inspectors will notice if work drags. Plan your project timeline carefully.
Don't let it lapse. Restarting the process costs more time and money.
Who Should Pull the Permit in Baltimore?
Your contractor normally pulls the permit in their name. That keeps legal responsibility where it belongs. The owner of the property can also apply under Section 105.
The rules get tighter for electrical, plumbing and HVAC. DHCD's permit guidelines require a licensed electrician or licensed mechanical and plumbing contractor for that work. Never let a contractor talk you into pulling the permit yourself. That setup rarely ends well.
Section 109 draws the lines clearly enough.
Chuck's Take
"I never let homeowners pull permits on my jobs. Insurance and liability stay with me that way. If a contractor in Baltimore asks you to pull it yourself walk away. That never ends clean. Let them do the paperwork they signed up for."
Leonard "Chuck" Thompson, LC Thompson Construction Co.
Baltimore's Square Footage Fee System
Baltimore stands out. Most cities tie building permit fees to project valuation. Baltimore charges interior alterations by affected square footage at $0.30 per square foot. No matter if you spend $15,000 or $50,000.
This kills the incentive to hide costs. It also keeps fees reasonable on high end kitchens. A kitchen with the same affected square footage pays the same building permit whether the finishes cost $25,000 or $50,000.
Section 109 of the 2024 Baltimore City Building Code sets this out, as amended by Ord. 24-341 and Ord. 24-437. I had to dig through the whole fee section before the formula clicked. Most cities don't work this way. Baltimore does. That changes how you budget. (The calculator reflects this exact quirk so you don't have to do the math yourself.)
Roof shingle replacement stays fully exempt. Structural roof work doesn't. Know the difference before you start.
Quick Reference · Baltimore Permit Requirements
| Homeowner Task | Permit? | Est. Cost |
|---|---|---|
| Paint interior / exterior | NO | Cosmetic |
| Replace flooring | NO | Cosmetic |
| Replace kitchen cabinets (same layout) | NO | Cosmetic |
| Swap a light fixture (same location) | NO | Cosmetic |
| Replace a water heater | YES | $52.00 Plumbing |
| Upgrade an electrical panel | YES | $57.00 Electrical |
| Remodel a bathroom | YES | $182.00 Electrical, Plumbing, Mechanical |
| Remodel a kitchen | YES | $182.00 Electrical, Plumbing |
| Replace / repair roof | EXEMPT | Permit not required |
| Build a deck or patio | YES | $78.00 Building |
| Build a fence (≤6 ft) | YES | $52.00 Building |
| Install solar panels | YES | $52.00 Electrical |
| Replace HVAC system | YES | $57.00 Mechanical |
| Replace windows (new opening) | YES | $109.00 Building |
∗ Costs are verified for Baltimore, MD from published fee schedule. Always confirm with your local building department.
Internal Comparison · separate trade permits
Compare Baltimore Permit Fees With Related Cities
Use these source-linked city pages to compare Baltimore against other Maryland markets and cities with similar permit fee structures.
Denver, COAlso uses separate trade permitsBathroom remodel permit package: $185.00 · +$3.00 vs Baltimore
Memphis, TNAlso uses separate trade permitsBathroom remodel permit package: $207.50 · +$25.50 vs Baltimore
St. Louis County, MOAlso uses separate trade permitsBathroom remodel permit package: $208.00 · +$26.00 vs Baltimore
Chicago, ILCross-market benchmarkBathroom remodel permit package: $325.00 · +$143.00 vs Baltimore
Fort Worth, TXCross-market benchmarkBathroom remodel permit package: $525.95 · +$343.95 vs Baltimore
Dallas, TXCross-market benchmark
Permit Guides
Permit Cost and Process Guides
Pricing a specific project in Baltimore? These guides cover what each permit runs and how the approval process actually works.
Building permit cost, every verified city ranked
How much does a building permit cost?
How long does a permit take to get?
When is a permit not required?
Deck permit cost
Roof replacement permit cost
HVAC permit cost
Kitchen remodel permit cost
Solar panel permit cost
EV charger permit cost
Do I need a permit to replace a water heater?
Do I need a permit for an electrical panel upgrade?
How to speed up a building permit
Getting an electrical permit online
What happens if you build without a permit
Before You Build
Budgeting the whole job? Compare real remodeling cost data at TheFatBook, our companion cost index.
Frequently Asked · Baltimore
How much does a building permit cost in Baltimore?
Each permit is priced on its own: the fee with a $25 minimum, the 5% Building Code permit tax rounded up, and the $25 application fee. A small trade permit runs $52 all-in, a central AC replacement $57, and the building permit for an interior alteration of 168 square feet or less $78. A kitchen or bath remodel takes three permits, building, plumbing and electrical, and totals $182.
Do I need a permit to replace a water heater in Baltimore?
Yes you need a permit to replace a water heater in Baltimore. An electric unit totals $52 including the $25 minimum, tax and application fee. Gas units route through the fuel burning appliance fee and land at $57. Pull it before you start.
How much is a plumbing permit in Baltimore?
A plumbing permit in Baltimore runs at least $52 all-in: the Section 109.3 $25 minimum, $2 of permit tax and the $25 application fee. Fixtures are $5 each, so a bathroom's three fixtures ($15) still sit under the minimum. A big fixture count raises the base above $25.
Do I need a permit in Baltimore to remodel a bathroom?
Yes you need permits for a bathroom remodel in Baltimore. It takes a building permit ($50 minimum, $78 all-in for a typical bathroom), a plumbing permit ($52 all-in for three fixtures) and an electrical permit. The electrical permit is $6 per circuit, $52 all-in at the $25 floor, so the bathroom comes to $182 in permits.
Why does Baltimore use square footage instead of project value for permit fees?
Baltimore charges interior alterations at $0.30 per affected square foot with a $50 minimum under Section 109. A $25,000 kitchen and a $50,000 kitchen of the same size pay the same building permit. It makes costs more predictable than valuation based cities.
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