Carroll County, MD Building Permit Fees (2026)
Residential building permit fees from the official Carroll County Bureau of Permits and Inspections fee schedule. Most residential projects are billed at a flat fee by category; new construction and large additions add a per-square-foot charge. Maryland adds no statewide percentage levy, and Carroll County itemizes no technology fee on its building permits.
This page covers: Carroll County residential building permit fees from the official Building Permit Fee Schedule (effective April 6, 2021) - the flat per-category fees for decks, alterations, finished basements, pools, solar, sheds, retaining walls, and demolition, plus the $170 + $0.12-per-square-foot structure for new residential construction and the $60 + $0.12-per-square-foot structure for additions, garages, and large sheds.
This page does NOT cover: Electrical, plumbing, and fire trade permits (each governed by a separate Carroll County fee schedule); zoning review; and Health Department well/septic fees.
Important note on impact fees: New living units are subject to current county impact fees, assessed separately and not part of the building permit fee. The building permit fee schedule does not print the impact-fee dollar amount, so no impact-fee figure is published on this page - confirm the current amount with Permits and Inspections.
Carroll County, MD prices most residential building permits as flat fees by category. A deck of any size is $60, a finished basement or interior remodel is $85, an in-ground pool is $120 (above-ground $60), and residential solar is $60. New construction is $170 plus $0.12 per square foot, so the building-permit side of a new 2,400 sq ft home is about $458 - separate from county impact fees. Unlike Virginia, Maryland adds no statewide percentage levy.
- Decks, porches, gazebos, and carports or sheds 500 sq ft or under are a flat $60; a finished basement, interior remodel, or repair is a flat $85.
- An in-ground pool is $120 and an above-ground pool is $60; residential solar panels are $60; a retaining wall over 48 inches is $60.
- New residential construction is $170 + $0.12 per square foot; additions, garages, pole buildings, and sheds over 500 sq ft are $60 + $0.12 per square foot plus $30 use-and-occupancy and $30 grading.
- A pre-fabricated one-story shed on skids is just $30; a residential demolition permit is $60.
- Maryland has no statewide percentage building-permit levy - there is no 2% add-on like Virginia's USBC levy - and Carroll County lists no technology fee on its building permits.
- The adopted schedule is dated April 6, 2021 - the most recent one posted on the county fee-schedule index - so confirm current amounts with Permits and Inspections before filing.
Carroll County Residential Building Permit Fee Schedule
All fees below are from the official Carroll County Building Permit Fee Schedule. Maryland adds no statewide levy. Each category's flat fee already includes the non-refundable filing fee; new construction and large additions add the per-square-foot charge shown - see the methodology section.
| Project Type | Building Permit Fee | Basis / Notes |
|---|---|---|
| New residential construction (single-family, duplex, townhouse, multi-family) | $170 + $0.12 / sq ft | $170 includes filing, use & occupancy, low-voltage, and grading fees |
| Addition, garage, pole building, shed over 500 sq ft | $60 + $0.12 / sq ft | Plus $30 use & occupancy and $30 grading |
| Deck, porch, gazebo, pavilion, carport, shed 500 sq ft or under (category B) | $60.00 | Flat fee; farm buildings $100 |
| Interior/exterior alteration, repair, remodel, finished basement (category C) | $85.00 | Flat fee (includes $60 filing) |
| In-ground swimming pool (category D) | $120.00 | Above-ground pool is $60 |
| Solar panels / wind turbine (category F) | $60.00 | Flat fee |
| Retaining wall over 48 in, chimney, driveway entrance, future footer & slab (category E) | $60.00 | Flat fee |
| Pre-fab shed, 1-story single unit on skids (category G) | $30.00 | Multi-unit or 2-story uses category B ($60) |
| Demolition (category H) | $60.00 | Residential |
| Permit plan revision / miscellaneous residential permit | $25.00 | Per revision or misc. permit |
| Re-inspection fee | $50 / $100 | $50 first additional; $100 repeated or beyond first |
| Impact fee - new living unit (separate) | Not on this schedule | Assessed separately on new units; confirm amount with the county |
Source: Carroll County Building Permit Fee Schedule, effective April 6, 2021 (most recent posted on the official fee-schedule index). Extracted June 8, 2026. Confirm current rates with the Bureau of Permits and Inspections before filing.
How Carroll County Calculates Building Permit Fees
| Step | What Happens | Carroll County Rule |
|---|---|---|
| 1. Identify the category | Match the project to a lettered fee-schedule category (A through H). | Most residential projects fall into a flat-fee category; only new construction (A) and large additions add a per-square-foot charge. |
| 2. Apply the flat category fee | Use the single flat fee for that category. | Deck/porch/shed (B) $60; alteration/finished basement (C) $85; pool (D) $60/$120; solar (F) $60; retaining wall (E) $60; demolition (H) $60. |
| 3. Add per-square-foot on new build / large work | New construction and additions multiply enclosed area by the rate. | New construction $170 + $0.12/sq ft; additions/garages/large sheds $60 + $0.12/sq ft + $30 U&O + $30 grading. |
| 4. Filing fee is already included | The non-refundable filing fee is bundled into each category fee. | Category B/C/D and the $170 new-construction base each include the filing fee - it is not added again. |
| 5. No state percentage levy | Maryland imposes no statewide building-permit levy. | There is no 2% add-on and no itemized technology fee; the category fee is the building-permit total. |
| 6. Impact fee is separate | New living units owe a county impact fee under a separate ordinance. | Not printed on this fee schedule; confirm the current amount with Permits and Inspections before budgeting a new home. |
Worked Examples
Example 1: Deck (any size)
| Fee Component | Rule Applied | Amount |
|---|---|---|
| Building Permit - deck (category B) | Flat fee | $60.00 |
Note: A residential deck is a flat $60 in Carroll County regardless of square footage, because it falls in category B (decks, porches, gazebos, pavilions). The filing fee is already included. Source: Carroll County Building Permit Fee Schedule, category B.
Example 2: Finished basement / interior remodel
| Fee Component | Rule Applied | Amount |
|---|---|---|
| Building Permit - alteration / finished basement (category C) | Flat fee | $85.00 |
Note: Interior and exterior alterations, repairs, remodeling, and finished basements all share the flat $85 category C fee, which already includes the $60 filing fee. Electrical and plumbing for the basement are separate trade permits. Source: Carroll County Building Permit Fee Schedule, category C.
Example 3: Room addition, 400 sq ft
| Fee Component | Rule Applied | Amount |
|---|---|---|
| Building Permit base - addition | Category base | $60.00 |
| Per-square-foot charge | 400 sq ft × $0.12 | $48.00 |
| Use & occupancy fee | Flat | $30.00 |
| Grading fee | Flat | $30.00 |
| Estimated Total | $60 + $48 + $30 + $30 | $168.00 |
Note: Additions use the $60 + $0.12/sq ft category, plus a $30 use-and-occupancy fee and a $30 grading fee. Trade permits (electrical, plumbing, mechanical) are separate. Source: Carroll County Building Permit Fee Schedule, addition category.
Example 4: New detached house, 2,400 sq ft
| Fee Component | Rule Applied | Amount |
|---|---|---|
| Building Permit base - new construction (category A) | Includes filing, U&O, low-voltage, grading | $170.00 |
| Per-square-foot charge | 2,400 sq ft × $0.12 | $288.00 |
| Estimated Building Permit Total | $170 + $288 | $458.00 |
| Impact fee - new living unit (SEPARATE) | Separate ordinance | Verify with county |
Note: The $458.00 is the building-permit side only. A new living unit in Carroll County ALSO owes a separate county impact fee, which is not printed on this fee schedule - confirm the current amount with Permits and Inspections so it is not a surprise. Trade permits are also separate. Source: Carroll County Building Permit Fee Schedule, category A.
Practitioner Insight
Carroll County's flat-fee structure is unusually simple for the region: a deck is $60 whether it is 80 square feet or 800, and a finished basement is $85 no matter the declared value. That makes Carroll one of the cheapest and most predictable jurisdictions in the Baltimore metro for small residential projects - there is no value-based math and no percentage levy to stack on top.
The one place the math changes is new construction and large additions, where the $0.12-per-square-foot charge is added to the category base. Even then the per-SF rate is low, so the building permit fee on a new home is modest. The number to plan for on a new home is the separate county impact fee, which is not on this schedule - call the Bureau of Permits and Inspections at 410-386-2674 to confirm which charges apply before you budget.
Carroll County Bureau of Permits and Inspections
Bureau of Permits and Inspections
Carroll County Government, Department of Public Works
410-386-2674
Permits and Inspections main line
carrollcountymd.gov
Fee schedules, forms, inspections
Building Permit Fee Schedule
Effective April 6, 2021 (most recent posted)
When This Estimate May Not Apply
Source age
The adopted schedule on file is dated April 6, 2021 - the most recent one posted on the official Carroll County fee-schedule index, but more than two years old. Confirm current amounts with the county before relying on these figures.
Impact fee on new units
New living units owe a separate county impact fee that is not printed on this building permit fee schedule. On a new home it can dwarf the permit fee; confirm the current amount with Permits and Inspections.
Trade permits are separate
Electrical, plumbing, and fire permits carry their own Carroll County fee schedules and are not included in the building-permit figures above.
Commercial or farm work
This page covers residential building permits. Commercial categories and farm buildings ($100) use different lines; do not apply these residential figures to those projects.
Frequently Asked Questions
Sources
-
Carroll County Building Permit Fee Schedule Effective April 6, 2021 - Carroll County, MD - Primary source for all building permit fees on this page - Extracted June 8, 2026.
-
Carroll County Permits and Inspections - Fee Schedules Current - Official index page hosting the building, electrical, plumbing, and fire fee schedules.
-
Carroll County Bureau of Permits and Inspections Current - Department home page - contact, permits, inspections.
Compare Carroll County's flat fees against Charles County's itemized model or Montgomery County's per-square-foot schedule, or see how the rest of Maryland prices the same project.
Permit Fees Are One Part of Your Project Budget
Once you know your Carroll County permit cost, two related numbers complete your total budget picture:
Property tax impact after your project closes
A permitted addition or pool increases your assessed value in Carroll County. See how Maryland jurisdictions calculate the ongoing property tax impact at CountyTaxTools.com.
Development impact and county surcharges
For new construction, Carroll County's separate impact fee on new units can exceed the building permit fee. Research development impact charges at ZoneFee.com.