Baltimore County Solar Permit Cost (2026)
Installing rooftop solar 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 solar power system as a flat $79, regardless of the system size or panel count. Maryland has no statewide percentage levy, so there is no Virginia-style 2% add-on. The electrical interconnection is a separate trade permit. 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 solar power system building permit fees as published in the Baltimore County PAI building permit fee schedule. A residential solar power system is a flat $79 regardless of system size. This building permit covers the structural and rooftop side of the installation.
This guide does NOT cover: The electrical permit for the inverter, wiring, disconnect, and utility interconnection is filed separately on Baltimore County's electrical fee schedule and is not priced here. Commercial roof-mounted ($0.11/sq ft, minimum $394) and ground-mounted ($0.0075/sq ft, minimum $310) solar follow a different per-square-foot track and are outside the residential flat fee. Utility (BGE) interconnection and net-metering applications. HOA approvals. Contractor labor, equipment, and material costs.
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 residential solar fee with PAI at 410-887-3900 before relying on any figure for a load-bearing budget.
When a Baltimore County solar permit is required: Baltimore County lists a residential solar power system as a permitted item, so a building permit is generally required to install rooftop solar. Confirm whether your specific scope requires a permit, and which trade permits apply, with PAI before assuming an exemption.
A Baltimore County, MD residential solar building permit costs a flat $79, regardless of the system size or panel count, because the county prices a residential solar power system as a single flat fee. Maryland adds no statewide percentage levy - so $79 is the entire building permit charge for the structural side. The electrical interconnection (inverter, disconnect, utility tie-in) 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 solar power system at a flat $79 - the system size in kilowatts and the panel count do not change the building permit fee.
- Maryland has no statewide percentage building-permit levy, so there is no 2% add-on like Virginia's USBC levy. The $79 is the entire building permit charge for the structural side.
- The electrical interconnection is separate. The inverter, wiring, disconnect, and utility tie-in are filed on Baltimore County's electrical permit schedule and are not included in the $79.
- Commercial and ground-mounted solar follow a different per-square-foot track ($0.11/sq ft roof-mounted with a $394 minimum; $0.0075/sq ft ground-mounted with a $310 minimum) - the $79 residential flat fee does not apply to those.
- At $79 flat, Baltimore County sits between Carroll County's $60 and Montgomery County's $227.12 for a residential rooftop solar building permit.
- 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 solar fee with PAI at 410-887-3900 before filing.
Baltimore County Solar Permit Fee Structure
Baltimore County uses a simple flat-fee structure for residential solar. There is no per-kilowatt tier and no percentage levy on the residential flat fee - the single $79 fee is the whole building permit charge for the structural side. The electrical interconnection is billed separately. Commercial and ground-mounted systems use a different per-square-foot track shown for context.
| Item | Building Permit Fee | How It Is Calculated |
|---|---|---|
| Residential solar power system (any size) | $79.00 | Flat fee. Applies regardless of system size or panel count. |
| Electrical interconnection (inverter / disconnect / tie-in) | Separate | Filed on Baltimore County's electrical fee schedule - not priced here. |
| Commercial roof-mounted solar | $0.11/sq ft (min $394) | Per-square-foot track - not the residential flat fee. |
| Ground-mounted solar | $0.0075/sq ft (min $310) | Per-square-foot track - not the residential flat fee. |
| 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, residential solar power system ($79.00). Printed effective date November 26, 2018. The electrical interconnection is billed separately on Baltimore County's electrical schedule. Confirm current rates with PAI before filing.
Worked Examples - Real Solar Projects in Baltimore County
Each example uses the same flat $79 fee for the residential building permit. Because Baltimore County prices residential solar as a flat fee, the building permit cost does not change with system size - it is $79 either way. The electrical interconnection is separate and not priced here.
A homeowner installs a 6 kW rooftop array (about 16 panels) on a single-family home in Towson.
- Residential solar power system: flat building permit fee = $79.00
- Maryland percentage levy: $0.00 (none)
- Building permit subtotal: $79.00
- Electrical interconnection permit: separate - not priced here
The system size is irrelevant to the building permit fee - a 4 kW and a 9 kW residential system both pay $79 for the building permit.
A homeowner installs a larger 10 kW array plus a home battery. The residential solar building permit uses the flat fee, and the electrical work is a separate trade permit.
Building permit (structural / rooftop):
- Residential solar power system flat fee = $79.00
- Maryland percentage levy: $0.00 (none)
- Building permit subtotal: $79.00
Trade permit (separate):
- Electrical permit for inverter, battery, disconnect, and utility interconnection - 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 small commercial building installs a 2,000 sq ft roof-mounted array. Commercial solar is not the residential flat fee - it uses the per-square-foot track.
- Roof-mounted commercial rate: 2,000 sq ft × $0.11 = $220.00
- Minimum applies: $394.00 minimum governs → $394.00
- Commercial building permit: $394.00
This example is shown only to illustrate the commercial track. Residential rooftop solar is the flat $79 and does not use the per-square-foot rate.
Baltimore County Solar Permit Cost vs Other Verified Jurisdictions
Baltimore County's $79 flat residential solar permit sits in the middle of the verified DMV range. The comparison below mixes fee bases - flat, per-square-foot waived, and bundled instant-permit - so read the basis column, not just the dollar figure. The electrical interconnection is excluded everywhere because it varies by scope.
| Jurisdiction | Residential Solar Fee Basis | Typical Building Permit |
|---|---|---|
| Baltimore County, MD | $79 flat | $79.00 |
| Carroll County, MD | $60 flat (category F) | $60.00 |
| Montgomery County, MD | $227.12 flat (rooftop) | $227.12 |
All three Maryland counties price residential rooftop solar as a flat building permit fee with no state levy, but the amounts differ - Carroll $60, Baltimore County $79, Montgomery $227.12. For broader context, Washington, DC processes residential solar through an Instant Permit at about $36.30 all-in, and Fairfax County, VA waives the building permit dollar amount but still requires the electrical trade permit. The electrical interconnection is excluded from every figure here. Baltimore County figures carry a November 26, 2018 printed effective date.
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 residential solar permit fee ($79 flat). 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 solar permit cost or compare against neighbors.