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Baltimore County Deck Permit Cost (2026)

Building a deck in Baltimore County, Maryland, needs a building permit, and the fee is pulled directly from the official Baltimore County Permits, Approvals and Inspections (PAI) building permit fee schedule. Baltimore County prices a residential open deck as a flat $105 under 600 sq ft, and $150 at 600 sq ft and over (when construction plans are required), plus a separately listed $75 residential permit application fee. Maryland has no statewide percentage levy, so there is no Virginia-style 2% add-on. Figures are from the PAI schedule effective July 1, 2026, re-verified November 4, 2026.

Deck Permit (under 600 sq ft)
$105 flat + $75 application fee
Deck Permit (600 sq ft and over)
$150 flat + $75 application fee
State / Local Percentage Levy
None (Maryland has no statewide levy)
Deck Electrical (if added)
Separate trade permit (not priced here)
Value Dependence
None - flat by size band, not build cost
Fee Status
Official schedule effective 07/01/26
What This Guide Covers - and What It Does Not

This guide covers: Baltimore County, Maryland residential deck building permit fees as published in the Baltimore County PAI building permit fee schedule. An open deck is a flat $105 under 600 sq ft and $150 at 600 sq ft and over, plus a separately listed $75 residential permit application fee. A deck with a roof adds a $20 occupancy fee. This single building permit covers the structural side of the deck - footings, framing, joists, decking, railings, and stairs.

This guide does NOT cover: The electrical permit for deck lighting, outlets, or a hot-tub circuit is filed separately on Baltimore County's electrical fee schedule and is not priced here. Zoning and setback approvals. HOA approvals. Contractor labor and material costs. The 600 sq ft and over $150 tier applies "when construction plans are required" per the schedule - confirm whether your deck triggers a plan-review requirement with PAI.

Application fee treatment: The schedule lists a separate $75 residential permit application fee and does not say whether it is credited toward the permit fee, so PermitPrice shows totals both ways: with the $75 added on top, and $75 lower if PAI credits it toward the permit. PermitPrice will update this page once the county confirms. Figures are from the schedule effective July 1, 2026, re-verified November 4, 2026.

When a Baltimore County deck permit is required: Baltimore County lists decks as a permitted item, so a building permit is generally required to build a deck. Confirm whether your specific deck (including ground-level or detached decks) requires a permit, and which trade permits apply, with PAI before assuming an exemption.

Key Takeaways
  • Baltimore County bills a residential open deck at a flat $105 under 600 sq ft and $150 at 600 sq ft and over, plus a $75 application fee - the fee depends on the size band, not the declared construction value. This is different from value-based jurisdictions like Henrico County, where a deck permit scales with declared cost.
  • Most residential decks fall under 600 sq ft, so the $105 tier is the common case. A large wraparound or multi-level deck of 600 sq ft or more moves to the $150 tier when construction plans are required.
  • Maryland has no statewide percentage building-permit levy, so there is no 2% add-on like Virginia's USBC levy. The flat fee plus the $75 application fee is the entire building permit charge for the deck structure.
  • Deck electrical is separate. Lighting, outlets, or a hot-tub circuit need an electrical permit filed on Baltimore County's electrical schedule and not included in the deck fee.
  • At $105 to $180 for a small deck ($180 if the $75 application fee is charged on top of the $105, $105 if it is credited), Baltimore County sits between Carroll County's $60 flat deck and Montgomery County's $223.87 small-deck fee.
  • Baltimore County replaced its 2018 schedule with one effective July 1, 2026 (re-verified November 4, 2026). The schedule does not say whether the $75 application fee is credited toward the permit, so PermitPrice shows it as an additional line.
Open the Permit Fee Calculator All Baltimore County Permit Fees

Baltimore County Deck Permit Fee Structure

Baltimore County uses a two-band flat-fee structure for decks. There is no per-square-foot rate within a band and no percentage levy - the single flat fee for your size band is the whole building permit charge for the structural side. Deck electrical, where added, is billed separately.

Item Building Permit Fee How It Is Calculated
Open deck under 600 sq ft $105.00 Flat fee within the band. Most residential decks land here.
Open deck 600 sq ft and over $150.00 Flat fee within the band, when construction plans are required.
Deck with roof +$20.00 Occupancy fee added to the deck fee for a roofed deck.
Permit application fee (residential) $75.00 Listed separately on the schedule; not stated whether it is credited toward the permit fee, so shown as additional.
Deck electrical (lighting / outlets / hot-tub circuit) Separate Filed on Baltimore County's electrical fee schedule - not priced here.
State / local percentage levy None Maryland has no statewide USBC-style percentage levy. No 2% add-on.

Source: Baltimore County Building Permit Fee Schedule (PAI BPP 15 Attachment A, Rev 6/30/26), effective July 1, 2026: open deck $105.00 under 600 sq ft; $150.00 at 600 sq ft and over when construction plans are required; residential permit application fee $75.00. Re-verified November 4, 2026. Deck electrical is billed separately on Baltimore County's electrical schedule.

Worked Examples - Real Deck Projects in Baltimore County

Each example uses the flat fee for the deck's size band. Because Baltimore County prices decks by size band rather than construction value, the building permit cost does not change with the build cost - it depends only on whether the deck is over 600 sq ft. Deck electrical, where added, is separate and not priced here.

Example 1: 240 sq ft attached deck, $12,000 build

A homeowner builds a 240 sq ft attached deck off the back of the house. Declared construction cost $12,000. No deck lighting.

  • Deck is under 600 sq ft: flat building permit fee = $105.00
  • Maryland percentage levy: $0.00 (none)
  • Permit application fee (residential, listed separately): $75.00
  • Building permit subtotal: $180.00 ($105.00 if the $75 application fee is credited toward the permit)

The $12,000 construction value is irrelevant to the building permit fee - a $6,000 deck and a $20,000 deck of the same size both pay $105 plus the $75 application fee.

Example 2: 480 sq ft deck with lighting

A homeowner builds a 480 sq ft deck and adds low-voltage step lighting and an outlet. The structural deck uses the flat fee, and the electrical work is a separate trade permit.

Building permit (structural):

  • Deck under 600 sq ft flat fee = $105.00
  • Maryland percentage levy: $0.00 (none)
  • Permit application fee (residential, listed separately): $75.00
  • Building permit subtotal: $180.00 ($105.00 if the $75 application fee is credited toward the permit)

Trade permit (separate):

  • Electrical permit for deck lighting and the outlet - filed on the Baltimore County electrical schedule, not priced here

PermitPrice does not estimate the Baltimore County electrical-permit amount because it is set on a separate county schedule that is not part of the building permit fee data verified for this page.

Example 3: 720 sq ft multi-level deck (600 sq ft and over)

A homeowner builds a large 720 sq ft multi-level deck. Because the deck is 600 sq ft or more and construction plans are required, the $150 tier applies.

  • Deck 600 sq ft and over: flat fee = $150.00
  • Maryland percentage levy: $0.00 (none)
  • Permit application fee (residential, listed separately): $75.00
  • Total all-in building permit: $225.00 ($150.00 if the $75 application fee is credited toward the permit)

The only step in the deck fee is the 600 sq ft band boundary - $105 below, $150 at 600 sq ft and over. There is no per-square-foot escalation within a band.

Baltimore County Deck Permit Cost vs Other Verified Jurisdictions

Baltimore County's $105 flat deck permit (under 600 sq ft; $105 to $180 depending on whether the $75 application fee is credited) sits in the middle of the verified Maryland cluster. The comparison below mixes fee bases - flat, size-banded, and per-square-foot - so read the basis column, not just the dollar figure. Deck electrical is excluded everywhere because it varies by scope.

Jurisdiction Deck Fee Basis Typical Building Permit
Baltimore County, MD $105 (<600 sq ft) / $150 (600+) + $75 application fee $105.00-$180.00
Carroll County, MD $60 flat (category B) $60.00
Montgomery County, MD $223.87 (≤500 sq ft) / per-SF over $223.87

Carroll prices a deck at a flat $60 at any size; Baltimore County uses a $105 / $150 size band at 600 sq ft plus a $75 application fee; Montgomery charges $223.87 for a deck up to 500 sq ft, then a per-square-foot rate above. None of the three adds a state levy. Deck electrical is excluded everywhere. Baltimore County figures are from its schedule effective July 1, 2026. For the statewide picture across both states, see the Virginia deck permit guide.

Side-by-Side Math

See how Baltimore County compares head-to-head against its Maryland neighbors.

Frequently Asked Questions

A Baltimore County residential open deck building permit costs a flat $105 under 600 sq ft and $150 at 600 sq ft and over (when construction plans are required), plus a separately listed $75 residential permit application fee - an estimated $180.00 for a 300 sq ft deck, or $105.00 if the $75 application fee is credited toward the permit. The fee is by size band, not declared construction value, and Maryland adds no statewide percentage levy. Deck electrical is a separate trade permit. These figures come from the PAI schedule effective July 1, 2026.
The $150 tier applies to decks of 600 sq ft and over when construction plans are required, per the Baltimore County PAI schedule. Decks under 600 sq ft pay the flat $105. Most residential decks fall under 600 sq ft, so the $105 tier is the common case. Confirm whether your deck triggers a plan-review requirement with PAI at 410-887-3900.
No. The deck building permit covers the structural side - footings, framing, joists, decking, railings, and stairs. Deck lighting, outlets, or a hot-tub circuit need a separate electrical permit filed on Baltimore County's electrical schedule and not included in the $105 deck fee or the $75 application fee. Contact PAI at 410-887-3900 for current electrical-permit fees.
No. Baltimore County prices decks by size band, not declared construction value. A $6,000 deck and a $20,000 deck of the same size both pay the same flat fee. This is different from value-based jurisdictions like Henrico County, VA, where a deck permit scales with declared cost.
At $105 to $180 for a deck under 600 sq ft ($180 with the $75 application fee on top, $105 if it is credited), Baltimore County sits between Carroll County's $60 flat deck and Montgomery County's $223.87 small-deck fee. See the Carroll County deck guide and the Montgomery County deck guide for the full math, and the Carroll vs Baltimore County comparison for a head-to-head.
The figures come from the Baltimore County Building Permit Fee Schedule effective July 1, 2026 (PAI BPP 15 Attachment A, Rev 6/30/26), re-verified November 4, 2026. It replaced the 2018 schedule, under which a small deck was $85. The schedule lists a separate $75 residential permit application fee and does not say whether it is credited toward the permit fee, so PermitPrice shows it as an additional line.
No. The $105 Baltimore County deck permit fee (plus the $75 application fee) is the county permit cost only. It does not include any contractor work. A residential deck in the Maryland market typically runs $8,000-$25,000 for the contractor scope depending on size, materials, and railings. The permit fee is a small line item in your overall deck budget.

Sources

Official Sources - Recorded June 2026
Next Step

Confirm your specific Baltimore County deck permit cost or compare against neighbors.

Always verify with the Baltimore County Department of Permits, Approvals and Inspections (PAI) before budgeting or filing. The building permit fee schedule used here took effect July 1, 2026. Call 410-887-3900 or check the PAI department page to confirm current building and electrical permit rates before submitting a deck application.
Disclaimer: All fee information on PermitPrice is for informational purposes only and is not an official permit quotation. Actual permit fees are determined by Baltimore County PAI at the time of application. Fee schedules and permit requirements can change without notice. Figures are from the schedule effective July 1, 2026; the $75 residential application fee is shown as additional because the schedule does not say whether it is credited. Deck electrical and other trade permits are billed separately and are excluded from the figures on this page.

Written by: Munib Ur Rehman

Data verified against official fee schedule documents.