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 deck as a flat $85 up to 600 sq ft, and $119 over 600 sq ft (when construction plans are required). Maryland has no statewide percentage levy, so there is no Virginia-style 2% add-on. The published schedule carries a printed effective date of November 26, 2018, so confirm current rates with PAI before budgeting.
This guide covers: Baltimore County, Maryland residential deck building permit fees as published in the Baltimore County PAI building permit fee schedule. A deck is a flat $85 up to 600 sq ft and $119 over 600 sq ft. 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 over-600 sq ft $119 tier applies "when construction plans are required" per the schedule - confirm whether your deck triggers a plan-review requirement with PAI.
Important note on fee schedule age: The Baltimore County PAI building permit fee schedule on file carries a printed effective date of November 26, 2018 - more than 24 months old. Confirm the current deck fee with PAI at 410-887-3900 before relying on any figure for a load-bearing budget.
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.
A Baltimore County, MD residential deck building permit costs a flat $85 up to 600 sq ft, and $119 over 600 sq ft (when construction plans are required). The fee is by size band, not declared construction value, and Maryland adds no statewide percentage levy - so the flat fee is the entire building permit charge for the structural side. Deck electrical (lighting, outlets, a hot-tub circuit) is a separate Baltimore County trade permit. These figures come from the PAI schedule that carries a November 26, 2018 printed effective date; confirm current rates with PAI at 410-887-3900.
- Baltimore County bills a residential deck at a flat $85 up to 600 sq ft and $119 over 600 sq ft - 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 $85 tier is the common case. A large wraparound or multi-level deck over 600 sq ft moves to the $119 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 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 $85, Baltimore County sits between Carroll County's $60 flat deck and Montgomery County's $194.67 small-deck fee.
- The PAI building permit fee schedule on file carries a printed effective date of November 26, 2018. Baltimore County may have adjusted rates since then. Always confirm the current deck fee with PAI at 410-887-3900 before filing.
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 |
|---|---|---|
| Deck up to 600 sq ft | $85.00 | Flat fee within the band. Most residential decks land here. |
| Deck over 600 sq ft | $119.00 | Flat fee within the band, when construction plans are required. |
| 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 PAI building permit fee schedule, deck line ($85.00 up to 600 sq ft; $119.00 over 600 sq ft when construction plans are required). Printed effective date November 26, 2018. Deck electrical is billed separately on Baltimore County's electrical schedule. Confirm current rates with PAI before filing.
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.
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 = $85.00
- Maryland percentage levy: $0.00 (none)
- Building permit subtotal: $85.00
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 $85.
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 = $85.00
- Maryland percentage levy: $0.00 (none)
- Building permit subtotal: $85.00
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.
A homeowner builds a large 720 sq ft multi-level deck. Because the deck is over 600 sq ft and construction plans are required, the $119 tier applies.
- Deck over 600 sq ft: flat fee = $119.00
- Maryland percentage levy: $0.00 (none)
- Total all-in building permit: $119.00
The only step in the deck fee is the 600 sq ft band boundary - $85 below, $119 above. There is no per-square-foot escalation within a band.
Baltimore County Deck Permit Cost vs Other Verified Jurisdictions
Baltimore County's $85 flat deck permit (under 600 sq ft) 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 | $85 (≤600 sq ft) / $119 (over) | $85.00 |
| Carroll County, MD | $60 flat (category B) | $60.00 |
| Montgomery County, MD | $194.67 (≤500 sq ft) / per-SF over | $194.67 |
Carroll prices a deck at a flat $60 at any size; Baltimore County uses a $85 / $119 size band at 600 sq ft; Montgomery charges $194.67 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 carry a November 26, 2018 printed effective date. For the statewide picture across both states, see the Virginia deck permit guide.
See how Baltimore County compares head-to-head against its Maryland neighbors.
Frequently Asked Questions
Sources
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Baltimore County Building Permit Fee Schedule (PAI) Printed effective date November 26, 2018 - Baltimore County, MD - Primary source for the deck permit fee ($85 up to 600 sq ft; $119 over). Extracted and recorded June 2026 2018 - verify current
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Baltimore County Department of Permits, Approvals and Inspections (PAI) Accessed June 2026 - Baltimore County, MD - Official department page hosting the building permit and electrical fee schedules. Phone 410-887-3900
Confirm your specific Baltimore County deck permit cost or compare against neighbors.