Howard County vs Carroll County, MD Building Permit Fees (2026)
Howard County and Carroll County both keep Maryland building permit fees low, but they get there differently. Howard charges $0.25 per square foot for new construction and additions, with flat $50/$100 alteration fees and a 10% technology fee. Carroll charges flat per-category fees - a deck is $60, a finished basement $85 - and only adds a per-square-foot component ($0.12/sq ft) on new homes and larger additions, with no technology fee. The result is a genuine split decision: Carroll is cheaper on basements and larger projects, while the two are nearly tied on a small addition.
For a finished basement, Howard County charges about $135 ($100 alteration + $10 technology fee + $25 filing) while Carroll County charges a flat $85 - Carroll is cheaper. For a new 2,400 square foot house, Howard is about $810 and Carroll about $458 on the building-permit side. On a 400 sq ft addition the two nearly tie ($160 Howard vs $168 Carroll), with Howard pulling ahead on small additions and Carroll on larger ones - the crossover is around 450 sq ft. Neither county adds a technology-fee-style state levy beyond Howard's own 10%.
- Howard prices by square foot ($0.25/sq ft new and additions; flat $50/$100 alterations) plus a 10% technology fee. Carroll prices flat per category ($60 deck, $85 basement, $120 in-ground pool) with $0.12/sq ft only on new homes and larger additions.
- A finished basement / interior remodel: about $135 in Howard vs a flat $85 in Carroll - Carroll wins.
- A new 2,400 sq ft house (building-permit side): about $810 in Howard vs about $458 in Carroll - Carroll wins.
- A 400 sq ft addition is a near-tie: about $160 in Howard vs about $168 in Carroll. The crossover is near 450 sq ft - Howard cheaper below, Carroll cheaper above.
- Neither county adds a statewide Maryland levy. Howard's 10% technology fee is its only percentage add-on; Carroll has none. The $50 Maryland Home Builder Guaranty Fund fee applies to new homes in both.
- Howard's schedule is current (effective July 1, 2025); Carroll's is dated April 6, 2021 - a source-age caveat applies to Carroll figures.
Howard vs Carroll: Fee Structure Side by Side
| Fee Element | Howard County (DILP) | Carroll County (Permits & Inspections) |
|---|---|---|
| New SF construction | $0.25 / sq ft + $100 filing | $170 + $0.12 / sq ft |
| Addition | $0.25 / sq ft + $50 filing | $60 + $0.12 / sq ft + $60 fees |
| Finished basement / remodel | Flat $100 (over 200 sq ft) + $25 filing | Flat $85 (category C) |
| Deck | Priced per sq ft (no separate deck line) | Flat $60 (category B) |
| In-ground pool | Building permit (confirm with DILP) | Flat $120 (category D) |
| Technology fee | 10% of permit fee | None |
| State levy | None (Maryland) | None (Maryland) |
| Fee schedule effective | July 1, 2025 (FY2026) | April 6, 2021 (verify current) |
Carroll's flat per-category model makes small discrete projects cheap and predictable; Howard's per-square-foot model scales with size. The $0.12/sq ft Carroll rate on new homes and larger additions is below Howard's $0.25/sq ft, so Carroll pulls ahead as projects get bigger. Carroll's published schedule is dated April 6, 2021 - confirm current figures with the county.
Shared-Assumption Worked Examples
Each example assumes the same project scope and square footage for both counties. Trade permits are excluded on both sides.
Example 1: Finished Basement / Interior Remodel (over 200 sq ft)
| Fee Component | Howard County | Carroll County |
|---|---|---|
| Building permit fee | Flat $100.00 (over 200 sq ft) | Flat $85.00 (category C) |
| Filing fee | $25.00 | included |
| Technology fee (10%) | $10.00 | $0.00 |
| Total | $135.00 | $85.00 |
Note: Carroll's flat $85 category C fee (filing included) beats Howard's $135 all-in. Both are flat - neither scales with the basement's size or value.
Example 2: Room Addition - 400 sq ft
| Fee Component | Howard County | Carroll County |
|---|---|---|
| Building permit fee | 400 × $0.25 = $100.00 | $60 + (400 × $0.12 = $48) = $108.00 |
| U&O + grading fees | n/a | $60.00 |
| Filing fee | $50.00 | included |
| Technology fee (10%) | $10.00 | $0.00 |
| Total | $160.00 | $168.00 |
Note: A near-tie. Carroll's addition line ($60 + $0.12/sq ft + $30 use/occupancy + $30 grading) lands at $168 for a 400 sq ft addition; Howard is $160. The crossover is near 450 sq ft - below it Howard is cheaper, above it Carroll's lower $0.12/sq ft rate wins. Carroll's addition reading (per-square-foot on additions of this size) is a disclosed interpretation of its schedule.
Example 3: New Detached House - 2,400 sq ft
| Fee Component | Howard County | Carroll County |
|---|---|---|
| Building permit fee | 2,400 × $0.25 = $600.00 | $170 + (2,400 × $0.12 = $288) = $458.00 |
| Filing fee | $100.00 | included in $170 |
| Technology fee (10%) | $60.00 | $0.00 |
| MD Home Builder Guaranty Fund | $50.00 | $50.00 (state, separate) |
| Total (building-permit side) | $810.00 | ~$508.00 |
Note: Building-permit side only. Carroll's $458 building permit (the $170 base bundles use/occupancy, low-voltage, and grading fees) plus the $50 state guaranty fund = about $508. The $50 Maryland Home Builder Guaranty Fund fee is a separate state charge on new homes that applies in both counties; it is not itemized on Carroll's schedule. Both counties assess large separate impact charges on new construction, excluded here.
Which County Is Cheaper for Your Project?
| Scenario | Lower Fee | Why |
|---|---|---|
| Finished basement / remodel | Carroll ($85 vs $135) | Carroll's flat category C fee includes filing; Howard adds filing + 10% |
| Deck | Carroll (flat $60) | Carroll publishes a flat deck fee; Howard has no separate deck line |
| Small addition (under ~450 sq ft) | Howard ($160 at 400 sq ft) | Carroll's $60 fixed fees outweigh Howard's $50 filing at small sizes |
| Large addition (over ~450 sq ft) | Carroll | Carroll's $0.12/sq ft is below Howard's $0.25/sq ft |
| New detached house | Carroll (~$508 vs $810) | Lower per-sq-ft rate and no 10% technology fee |
Carroll County is cheaper on basements, decks, and any project over roughly 450 sq ft, largely because it has no technology fee and a $0.12/sq ft rate on new construction. Howard County edges ahead only on small additions under about 450 sq ft. Remember Carroll's schedule is dated April 2021 - verify current figures before relying on them.
Practitioner Insight
This is one of the closer Maryland match-ups, and the answer genuinely depends on the project. Carroll County's flat per-category schedule rewards discrete projects - a $60 deck, an $85 finished basement, a $120 in-ground pool - with no technology fee and no square-footage math. Howard County's per-square-foot model is competitive on small additions, where its $50 filing fee undercuts Carroll's stacked $60 fixed fees, but it loses ground as projects grow because $0.25/sq ft plus a 10% technology fee outpaces Carroll's $0.12/sq ft. The crossover on additions sits near 450 sq ft. On a new house, Carroll's lower rate and absence of a technology fee make it several hundred dollars cheaper on the building-permit side. The one caution: Carroll's published schedule is dated April 6, 2021, so confirm current figures at 410-386-2674, while Howard's FY2026 schedule (410-313-2455) is current. On a new home, the separate impact fees in both counties will dwarf either permit fee.
Frequently Asked Questions
Sources
-
Howard County DILP - FY26 Building Permit Fee Schedule Effective July 1, 2025 - Howard County, MD
-
Carroll County - Building Permit Fee Schedule Effective April 6, 2021 - Carroll County, MD - verify current
See each county's full fee page, or compare more Maryland jurisdictions.