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Harford vs Baltimore County, MD Building Permit Fees (2026)

Side-by-side comparison of two neighboring Maryland counties, using official fee schedule data verified from both harfordcountymd.gov and baltimorecountymd.gov. The two counties use opposite pricing models. Harford charges $0.15 per square foot plus a flat $100 application fee on most residential work, so the fee scales with project size. Baltimore County charges flat fees by structure type - $105 for an addition under 600 sq ft, $35 for a residential fence, $45 for a wood stove - plus a separately listed $75 residential application fee, on a schedule effective July 1, 2026. Maryland adds no statewide levy for either county.

Calculate Your Project Harford Fees Baltimore County Fees

Evidence and Source Confidence

Both jurisdictions have official PermitPrice fee verifications on current schedules. Harford's schedule is effective January 1, 2025 (PDF revised 01/01/2026). Baltimore County's schedule took effect July 1, 2026 and was re-verified November 4, 2026. The math below uses verified inputs from each county's published fee schedule.

Harford County

Verified

Source: Harford County DILP Fee Schedule (Bill 24-013). Extracted via pdfplumber from harfordcountymd.gov and verified June 8, 2026.

Current schedule: Effective January 1, 2025, with PDF footers reading "Revised 01/01/2026." The $0.15/sq ft rate, $100 application fee, $20 small-shed fee, $50 MHIC fee, and the separate $10,000 impact fee (Bill 24-033) are itemized on the official schedule. High confidence. Verify with DILP at 410-638-3122 before filing.

Baltimore County

Schedule effective 07/01/26

Source: Baltimore County Building Permit Fee Schedule (PAI BPP 15 Attachment A, Rev 6/30/26). Extracted from baltimorecountymd.gov and re-verified November 4, 2026.

Current schedule: The PDF is headed "Effective 07/01/26" and replaced the 2018 schedule. Baltimore County's schedule lists a separate $75 residential permit application fee and does not say whether it is credited toward the permit fee, so PermitPrice shows Baltimore totals with and without it and will update them once the county confirms. Verify with PAI at 410-887-3900 before filing.

Fee Structure Side-by-Side

These two counties sit at opposite ends of the fee-design spectrum. Harford is formula-driven: $0.15 per square foot plus a $100 non-refundable application fee on most residential permits, so the fee tracks project size. Baltimore County is flat-fee-driven: a fixed price per structure type regardless of exact size within each tier. Neither county adds a technology fee or a Maryland state levy.

Project Type Harford County Baltimore County
New residential 1-2 family $0.15 per sq ft
+ $100 application fee + $50 MHIC		 $280 category minimum
(Fee Category D; + $50 guaranty fund + $75 application fee)
Addition / alteration $0.15/sq ft + $100 $105 (<600 sq ft, no structural changes)
$160 (structural changes, or 600 sq ft and over)
Deck Not separately itemized
(likely the per-sq-ft / accessory path - confirm with DILP)		 $105 (<600 sq ft)
$150 (600 sq ft and over)
Shed / accessory structure $20 flat (≤200 sq ft, no inspection)
$0.15/sq ft + $100 (over 200 sq ft)		 $105 (<1,000 sq ft)
$160 (1,000 sq ft and over)
Fence (residential) $20 + $0.10/ft over 250 ft $35 + $0.05/ft over 250 ft
Wood stove / fireplace $160 flat $45 flat
Residential solar Per DILP schedule (not modeled) $100 flat
In-ground pool $200 + $0.10/ft fence Per PAI schedule (not modeled)
Application fee $100 (all residential per-sq-ft permits) $75 residential (all permits; not stated whether credited)
Technology fee / state levy None / None (Maryland) None / None (Maryland)
MHIC guaranty fund fee (new home) $50 (itemized on schedule) $50 (itemized on schedule)
Separate new-construction charges $10,000 impact fee (Bill 24-033) Impact/development fees excluded from schedule
Schedule effective date Jan 1, 2025 (revised 01/01/2026) Jul 1, 2026

Sources: Harford County DILP Fee Schedule (Bill 24-013, eff. Jan 1, 2025, PDF revised 01/01/2026) and Baltimore County Building Permit Fee Schedule (PAI BPP 15 Attachment A, Rev 6/30/26, eff. Jul 1, 2026). Three scope warnings apply to every row: (1) Baltimore County totals are shown as a range because its separately listed $75 residential application fee may or may not be credited toward the permit - the schedule does not say; (2) Harford's $10,000 impact fee on new single-family homes and townhouses is a separate charge under Bill 24-033 and is never added into any permit total on this page; (3) decks are not directly comparable because Harford does not itemize a deck fee. Trade permits (electrical, plumbing, mechanical) are separate in both counties and not modeled.

Worked Examples - Same Project, Both Counties

Each example uses identical project assumptions and applies each county's official schedule. All arithmetic is reproducible from the verified inputs. Baltimore County figures come from its schedule effective July 1, 2026 and are shown as a range: without and with the $75 residential application fee; Harford's separate $10,000 impact fee is disclosed but never added to any total.

Shared Project Harford County Baltimore County Cheaper
400 sq ft addition $160 ($60 + $100) $105-$180 ($105, + $75 if not credited) Depends on the $75: Harford by $20 or Baltimore Co. by $55
700 sq ft addition $205 ($105 + $100) $160-$235 ($160, + $75 if not credited) Depends on the $75: Harford by $30 or Baltimore Co. by $45
192 sq ft shed (12x16) $20 flat $105-$180 ($105, + $75 if not credited) Harford by $85-$160
400 sq ft shed / garage $160 ($60 + $100) $105-$180 ($105, + $75 if not credited) Depends on the $75: Harford by $20 or Baltimore Co. by $55
150 ft fence $20 $35-$110 ($35, + $75 if not credited) Harford by $15-$90
400 ft fence $35 ($20 + 150 × $0.10) $43-$118 ($35 + 150 × $0.05 = $42.50, rounded up to $43, + $75 if not credited) Harford by $8-$83
New 2,400 sq ft home $510 (incl. $50 MHIC)* $330-$405 stated minimum** Not directly comparable
Wood stove $160 flat $45-$120 ($45, + $75 if not credited) Baltimore Co. by $40-$115

* Excludes Harford's separate $10,000 impact fee (Bill 24-033) - always a separate charge, never added to the permit total. ** Baltimore County's $330 to $405 is the $280 Category D minimum plus the $50 MD Home Builders Guaranty Fund, plus the $75 application fee if it is not credited; the schedule publishes no per-square-foot rate for Category D, so the actual fee for a 2,400 sq ft home could be higher. Baltimore County's schedule lists a separate $75 residential permit application fee and does not say whether it is credited toward the permit fee, so PermitPrice shows Baltimore totals with and without it and will update them once the county confirms. Baltimore County fees are rounded up to the nearest dollar.

Example 1: 400 sq ft room addition

A homeowner builds a 400 sq ft single-story addition.

Harford County

  • Building permit (400 × $0.15): $60.00
  • Application fee: $100.00
  • Technology fee / state levy: none

Total: $160.00

Baltimore County

  • Addition flat fee (<600 sq ft, no structural changes): $105.00
  • Application fee (listed separately; may be credited): $0.00-$75.00
  • Technology fee / state levy: none

Total: $105.00-$180.00 ($160.00-$235.00 with structural changes)

Winner depends on the $75 application fee. Under Baltimore County's July 1, 2026 schedule its addition fee is $105 and a $75 application fee is listed separately. If that fee is additional, Harford's $0.15/sq ft + $100 is $20 lower at 400 sq ft; if it is credited toward the permit, Baltimore County is $55 lower. At 700 sq ft Harford is $205 vs Baltimore County's $160 to $235 - Harford $30 lower or Baltimore County $45 lower, again depending on the credit. Under either assumption Baltimore County is cheaper for additions from about 534 to 599 sq ft without structural changes and from 900 sq ft up (a tie at 900 if the $75 is additional), where Harford's per-square-foot charge passes Baltimore County's flat tiers.

Example 2: 12x16 ft shed (192 sq ft)

A homeowner places a 12x16 ft (192 sq ft) shed behind a single-family house. See the Harford County shed permit guide for the full breakdown on the Harford side.

Harford County

  • Accessory structure ≤200 sq ft: $20.00 flat
  • No certificate of occupancy or inspection required
  • No application fee at this size

Total: $20.00

Baltimore County

  • Accessory structure <1,000 sq ft: $105.00 flat
  • Application fee (listed separately; may be credited): $0.00-$75.00

Total: $105.00-$180.00

Harford wins by $85.00 to $160.00. Harford's $20 flat fee for a 1-2 family accessory structure of 200 sq ft or under - with no certificate of occupancy or inspection required - is one of the cheapest shed permits in Maryland. The advantage narrows once the structure crosses 200 sq ft: a 400 sq ft garage is $160 in Harford (400 × $0.15 + $100) versus $105 to $180 in Baltimore County ($105, plus $75 if the application fee is not credited), so the winner there depends on that credit, and from about 534 sq ft up Baltimore County's flat fee is lower either way.

Example 3: New 2,400 sq ft detached home

A builder pulls a permit for a new 2,400 sq ft single-family home (building-permit side only). This example is labeled "not directly comparable" because the two sides are measured differently: Harford's total is exact arithmetic from its formula, while Baltimore County's is only the stated minimum of its area-based category.

Harford County (exact)

  • Building permit (2,400 × $0.15): $360.00
  • Application fee: $100.00
  • MHIC fee: $50.00

Total: $510.00

Separate charge, not included above: $10,000 impact fee per new single-family home or townhouse (Bill 24-033, eff. March 1, 2025).

Baltimore County (stated minimum)

  • Fee Category D minimum (residential 1-2 family): $280.00
  • MD Home Builders Guaranty Fund: $50.00
  • Application fee (listed separately; may be credited): $0.00-$75.00
  • No per-square-foot Category D rate is published - the actual fee for 2,400 sq ft could be higher

Stated minimum: $330.00-$405.00

Impact/development fees are excluded from Baltimore County's permit fee schedule - check separately with PAI.

Not a like-for-like total. Harford's $510.00 is exact: $360 permit + $100 application fee + $50 MHIC. Baltimore County's $330.00 to $405.00 is only the stated Category D minimum plus the $50 guaranty fund, plus the $75 application fee if it is not credited - the fee for a real 2,400 sq ft home could be higher, so do not read the $105 to $180 gap as a verified saving. The dominant number on the Harford side is not on the permit at all: the separate $10,000 impact fee per new single-family home dwarfs every permit figure in this comparison and applies in Harford only.

When Each County Is Cheaper

Baltimore County's July 1, 2026 schedule lists a separate $75 application fee and does not say whether it is credited toward the permit, so this table tests each category both ways. Harford wins small sheds and fences at typical lengths either way; Baltimore County wins large additions and accessory structures and wood stoves either way. For small and mid-size additions and 201-533 sq ft sheds or garages, the winner depends on whether the $75 is credited.

Project Type Cheaper County Why
Addition under 900 sq ft Depends on the $75 credit If the $75 is additional, Harford's $0.15/sq ft + $100 stays below Baltimore County's $180 up to 533 sq ft and below $235 from 600 to 899 sq ft. If it is credited, Baltimore County's $105 / $160 is lower at nearly every size (Harford is $160 at 400 sq ft). Baltimore County is lower either way from 534 to 599 sq ft without structural changes.
Addition 900 sq ft and over Baltimore County Baltimore County stays flat at $160 to $235 ($160, plus $75 if not credited) while Harford keeps climbing (900 sq ft = $235, a tie at most; 1,200 sq ft = $280).
Shed 200 sq ft or under Harford Flat $20 with no inspection or certificate of occupancy, versus $105 to $180 ($105, plus $75 if not credited) in Baltimore County.
Shed / garage 201-533 sq ft Depends on the $75 credit $0.15/sq ft + $100 stays below Baltimore County's $180 up to 533 sq ft if the $75 is additional, but above Baltimore County's $105 at every size here if it is credited (400 sq ft = $160 vs $105-$180).
Shed / garage 534 sq ft and over Baltimore County Baltimore County stays at $105 to $180 under 1,000 sq ft and $160 to $235 at 1,000 sq ft and over, while Harford's per-square-foot charge keeps climbing.
Fence up to 250 ft Harford $20 versus Baltimore County's $35, or $110 if its $75 application fee is not credited.
Fence over 250 ft Harford up to 549 ft Both add a per-foot charge over 250 ft ($0.10 Harford, $0.05 Baltimore County). A 400 ft fence is $35 vs $43 to $118, so Harford is lower either way up to 549 ft (a tie at 550 ft). Beyond that, Baltimore County is lower if the $75 is credited and Harford if it is additional.
Wood stove Baltimore County $45 flat, or $120 if the $75 application fee is not credited, versus Harford's $160 flat square-footless permit - a $40 to $115 difference.
New single-family home Not directly comparable Harford $510 is exact (incl. $50 MHIC) but adds a separate $10,000 impact fee; Baltimore County's $330 to $405 is only a stated category minimum plus guaranty fund, plus the application fee if not credited.
Deck Not comparable Baltimore County is $105/$150 by size plus a $75 application fee that may be credited; Harford does not itemize a deck fee - likely the per-sq-ft/accessory path, confirm with DILP.

Caveat: this comparison covers building permit fees only. Baltimore County figures come from its schedule effective July 1, 2026 and are shown with and without its $75 residential application fee; if PAI credits that fee toward the permit, every Baltimore County total is $75 lower, which flips the small and mid-size addition and garage results to Baltimore County. PermitPrice will update this page once the county confirms; you can ask PAI at 410-887-3900. The biggest dollar item on new construction is Harford's separate $10,000 impact fee (Bill 24-033), which is set under its own ordinance and never added into any permit total here. Trade permits (electrical, plumbing, mechanical), zoning, and Health Department fees are separate in both counties.

Frequently Asked Questions

It depends on the project. Harford is cheaper either way for small sheds (a flat $20 up to 200 sq ft vs $105 to $180) and fences at typical lengths ($20 vs $35 to $110 at 150 ft; $35 vs $43 to $118 at 400 ft). Baltimore County is cheaper either way for wood stoves ($45 to $120 vs $160) and for large additions (900 sq ft and up) and accessory structures (about 534 sq ft and up). For a 400 sq ft addition or garage ($160 in Harford vs $105 to $180 in Baltimore County) the winner depends on whether Baltimore County credits its separately listed $75 application fee toward the permit, which its schedule does not say. New homes are not directly comparable.
Yes. Baltimore County replaced its 2018 schedule with a new one headed "Effective 07/01/26" (PAI BPP 15 Attachment A, Rev 6/30/26), which PermitPrice re-verified on November 4, 2026. Baltimore County's schedule lists a separate $75 residential permit application fee and does not say whether it is credited toward the permit fee, so PermitPrice shows Baltimore totals with and without it and will update them once the county confirms. Harford's schedule is effective January 1, 2025 with a PDF revision dated 01/01/2026.
Baltimore County itemizes decks directly: $105 under 600 sq ft and $150 at 600 sq ft and over, plus the $75 application fee. Harford County does not itemize a deck fee on its schedule at all - a deck is most likely billed under the per-square-foot residential path or as an accessory structure, but PermitPrice does not publish a Harford deck dollar amount because the schedule does not state one. Confirm deck classification and fee with Harford DILP at 410-638-3122 before budgeting.
On the all-in county-charges side, very likely yes. Harford charges a $10,000 impact fee per new single-family home or townhouse under Bill 24-033 (effective March 1, 2025). It is a separate charge under its own ordinance - not part of the building permit fee - which is why no total on this page includes it. Baltimore County's permit fee schedule explicitly excludes impact and development fees, so any comparable charges there must be checked separately with PAI. Always compare the full charge stack, not just the permit fee.
No. Maryland has no statewide percentage building-permit levy, so neither county adds a Virginia-style 2% surcharge, and neither itemizes a technology fee. Both counties itemize a $50 Maryland Home Builders Guaranty Fund fee on new home permits. Baltimore County also lists a separate $75 residential permit application fee.
Just the county building permit fee. The figures here exclude trade permits (electrical, plumbing, mechanical - separate schedules in both counties), Harford's separate $10,000 impact fee, any Baltimore County impact or development charges, zoning and development fees, Health Department well/septic fees, contractor labor, and materials. Your contractor's quote is the source of truth for total project cost.

Calculate Your Specific Project

Get the full fee schedule for either county, or dive into a specific project type with a dedicated guide.

Sources

Official .gov Sources - Verified June 2026
  • Harford County DILP Fee Schedule (Bill 24-013) Effective January 1, 2025 (PDF revised 01/01/2026) - Harford County, MD - Source for the Harford side of every comparison: $0.15/sq ft, $100 application fee, $20 small-shed fee, $160 wood stove, fence formula, $50 MHIC, $10,000 impact fee - Verified June 8, 2026 Verified
  • Baltimore County PAI Building Permit Fee Schedule (PAI BPP 15 Attachment A, Rev 6/30/26) Effective July 1, 2026 - Baltimore County, MD - Source for the Baltimore County side: $105/$160 additions, $105/$150 decks, $105/$160 accessory, $35 fence, $45 wood stove, $100 solar, $280 Category D minimum, $50 guaranty fund, $75 residential application fee - Re-verified November 4, 2026
Next Step

Get the full fee schedule for either county, or check more Maryland comparisons.

Verify current fees with both counties before relying on this comparison for filing. Harford County DILP: 410-638-3122. Baltimore County PAI: 410-887-3900. Harford's schedule is current (effective January 1, 2025, PDF revised 01/01/2026); Baltimore County's schedule took effect July 1, 2026. Always confirm rates and project classification before submitting an application in either county.
Disclaimer: All fee information on PermitPrice is for informational purposes only and is not an official permit quotation. Actual permit fees are determined by Harford County DILP or Baltimore County PAI at the time of application. Baltimore County figures use its schedule effective July 1, 2026 and are shown with and without a $75 residential application fee because the schedule does not say whether it is credited. Harford's $10,000 impact fee on new single-family homes and townhouses (Bill 24-033) is a separate charge under its own ordinance and is excluded from every building-permit figure in this comparison. Harford does not itemize a deck fee, so no Harford deck amount is published here. Trade permits, zoning, impact/development charges, and Health Department fees are separate and not modeled.

Written by: Munib Ur Rehman

Data verified against official fee schedule documents.