Roof Replacement Permit in Baltimore County, Maryland
It depends
Sometimes, depending on the project
Before a re-roof in which 50 percent or more of the sheathing or deck is replaced, before replacing any structural component, and before any roof work at all on a property in a historic district or on the Landmarks List.
Issued byBaltimore County Department of Permits, Approvals and Inspections (PAI)
By Mario Bailey, verified against official sources
Quick answer
Baltimore County does not require a building permit for an ordinary shingle tear-off and replacement. A permit is triggered when 50 percent or more of the sheathing or deck is being replaced, when any structural component is replaced, or when the property sits in a proposed or designated Baltimore County Historic District or on the Landmarks List. The county also states plainly that no permit is needed to put two layers of shingles on a roof.
Typical threshold: share of the sheathing or deck being replaced in a roofing job.
Who is pulling this permit?
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When a permit is usually needed
Before a re-roof in which 50 percent or more of the sheathing or deck is replaced, before replacing any structural component, and before any roof work at all on a property in a historic district or on the Landmarks List.
What a roof replacement permit costs in Baltimore County
How Baltimore County compares in Maryland
| Jurisdiction | Permit needed? | Threshold |
|---|---|---|
| Baltimore Countythis page | It depends | share of the sheathing or deck being replaced in a roofing job |
| Howard County | It depends | roof covering replacement with no other structural repairs is exempt, including up to 64 sq ft of roof sheathing; replacing more sheathing or any other structural repair requires a building permit |
| Montgomery County | No permit needed | Exempt |
| Prince George's County | It depends | Before replacing roof sheathing or plywood, or doing any roof work that involves... |
How to apply in Baltimore County
In Baltimore County, a residential reroof permit application is lighter than for structural work: you state whether the scope is a full tear-off (roof replacement) or an overlay (roof recover), describe the covering material and its manufacturer instructions, and note the condition of the existing deck, since those facts determine which code path applies.
What most roof replacement permit applications include:
- State on the application whether the job is a roof replacement, which strips all existing layers down to the bare deck, or a roof recover, which leaves the old covering in place under specific conditions, since the two scopes are governed differently (IRC R908.3).
- For Baltimore County, a recover is only an option where the new covering follows the roof covering manufacturer's approved instructions or is a self-supporting system, such as standing-seam metal, that does not rely on the existing roof for support (IRC R908.3.1).
- Full tear-off must be scoped on the application instead of a recover when the existing roof is water soaked or deteriorated, is slate, clay, cement, or asbestos-cement tile, or already carries two or more layers of roof covering (IRC R908.3.1.1).
- For Baltimore County, the materials and installation methods described on the application must comply with the reroofing requirements of the roof-assemblies chapter (IRC R908.1).
- If the scope reuses existing slate, clay, or cement tile, damaged or broken pieces cannot be listed for reinstallation, and any rusted or deteriorated flashings, edgings, outlets, or vents uncovered during tear-off must be scoped for replacement (IRC R908.5).
General submittal guidance from IRC Section R908 Reroofing (text as adopted in the 2020 Residential Code of New York State, based on the 2018 IRC). Source. Baltimore County Department of Permits, Approvals and Inspections (PAI) sets the exact checklist for Baltimore County.
Where to apply in Baltimore County:
Baltimore County Department of Permits, Approvals and Inspections (PAI)
- County Office Building, 111 West Chesapeake Avenue, Towson, Maryland 21204
- Phone: 410-887-3900
Roof Replacement Permit in Baltimore County compared with nearby Maryland localities
| Locality | Permit needed? | Threshold | What each Maryland schedule says | Verified |
|---|---|---|---|---|
| Baltimore County | It depends | share of the sheathing or deck being replaced in a roofing job | ...alteration: Additions/Alterations under 600 sf without structural changes $105.00... | |
| Howard County | It depends | roof covering replacement with no other structural repairs is exempt, including up to 64 sq ft of roof sheathing; replacing more sheathing or any other structural repair requires a building permit | Not published | |
| Montgomery County | No permit needed | Exempt | No fee for replacing only the roof covering since no permit is required | |
| Prince George's County | It depends | Before replacing roof sheathing or plywood, or doing any roof work that involves... | ...Residential" to "Alteration/Repair without U&O - Exterior", minimum permit fee... |
Inspections and closing out your permit
In Baltimore County, most residential reroofs get two to three field inspections keyed to the scope of work: a deck or nailing check when sheathing is exposed or replaced, a final on the completed covering and flashings, and in some high-wind regions a dedicated check of mitigation measures added during tear-off.
- In Baltimore County: where the covering is fully removed and the sheathing is exposed, replaced, or added, inspectors check the deck and its nailing before any new roofing goes down, since the structural framework must be able to carry the new covering's loads (IRC R908.2).
- In Baltimore County: an overlay is only approved where it meets one of the code's listed recover conditions, such as installation in accordance with the covering manufacturer's approved instructions (IRC R908.3.1).
- In Baltimore County: flashings disturbed or replaced during the job are checked against the approved manufacturer's installation instructions, and metal flashing that will receive bituminous material must be primed before installation (IRC R908.6).
- In Baltimore County: a final inspection confirms the completed roof covering and its fasteners were installed as required for that material and per manufacturer instructions before the permit is closed (IRC R905).
- In Baltimore County: in some regions with strengthened wind provisions, reroofing an older single-family home also triggers inspection of supplemental deck-nailing and a secondary water barrier added during tear-off, on top of the base reroofing requirements (Florida Building Code, Residential R908.7 Mitigation).
- In Baltimore County: reinstalled existing slate, clay, or cement tile is checked against reuse limits at inspection, and any rusted, damaged, or deteriorated flashings, edgings, outlets, or vents found during tear-off must be replaced rather than reinstalled (IRC R908.5).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Baltimore County permit portal or by phone at 410-887-3900.
Inspection sequence from IRC Section R908 Reroofing and Section R905 Roof Coverings (2021 International Residential Code). Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Roof Replacement Permit checklist for Baltimore County
- Confirm the requirement. Sometimes, depending on the project. Typical threshold: share of the sheathing or deck being replaced in a roofing job. Usually needed: Before a re-roof in which 50 percent or more of the sheathing or deck is replaced, before replacing any structural component, and before any roof work at all on a property in a historic district or on the Landmarks List.
- Budget the fee. The Building Permit Fee Schedule effective 07/01/26 publishes no roofing line item. A qualifying re-roof is filed as a residential alteration: Additions/Alterations under 600 sf without structural changes $105.00, with structural changes $160.00, plus the $75.00 residential permit application fee. Official fee schedule.
- Apply. In Baltimore County, a residential reroof permit application is lighter than for structural work: you state whether the scope is a full tear-off (roof replacement) or an overlay (roof recover), describe the covering material and its manufacturer instructions, and note the condition of the existing deck, since those facts determine which code path applies. Start at the Baltimore County permit portal.
- Keep the office details handy. Baltimore County Department of Permits, Approvals and Inspections (PAI). Phone: 410-887-3900. Address: County Office Building, 111 West Chesapeake Avenue, Towson, Maryland 21204.
- Plan for inspections. In Baltimore County, most residential reroofs get two to three field inspections keyed to the scope of work: a deck or nailing check when sheathing is exposed or replaced, a final on the completed covering and flashings, and in some high-wind regions a dedicated check of mitigation measures added during tear-off.
Compiled from the official sources on this page. Last checked .
Frequently asked questions
- Do you need a roof replacement permit in Baltimore County?
- Baltimore County does not require a building permit for an ordinary shingle tear-off and replacement. A permit is triggered when 50 percent or more of the sheathing or deck is being replaced, when any structural component is replaced, or when the property sits in a proposed or designated Baltimore County Historic District or on the Landmarks List. The county also states plainly that no permit is needed to put two layers of shingles on a roof. Share of the sheathing or deck being replaced in a roofing job. Always confirm with the office before starting.
- How much does a roof replacement permit cost in Baltimore County?
- The Building Permit Fee Schedule effective 07/01/26 publishes no roofing line item. A qualifying re-roof is filed as a residential alteration: Additions/Alterations under 600 sf without structural changes $105.00, with structural changes $160.00, plus the $75.00 residential permit application fee. See the official fee schedule for current amounts.
- Where do you apply for a roof replacement permit in Baltimore County?
- You can apply through the Baltimore County permit portal or contact the Baltimore County Department of Permits, Approvals and Inspections (PAI) directly. The links are listed on this page.
- Can a homeowner pull a roof replacement permit themselves in Baltimore County?
- Under Maryland law (Md. Code, Bus. Occ. and Prof. 12-301(b), 6-607(1); Public Safety 12-505): It depends on the trade and the county. Plumbing: state law exempts an individual who personally provides plumbing services in their own residence, but homeowners may not make final connections between the residence and public or private water supply or disposal systems, and Baltimore County plus the WSSC-area counties are largely carved out of the state plumbing title. Electrical: the Maryland Electricians Act prohibits providing electrical services for compensation without a license; it has no express homeowner exemption, so uncompensated work on one's own home falls outside the licensing prohibition, but each county decides whether it will issue an electrical permit to an unlicensed homeowner. Building permits are issued by local jurisdictions, which set their own owner-applicant rules. Confirm how Baltimore County applies this before you apply.
From the Library
What else needs a permit in Baltimore County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Deck Permit | It depends | deck floor area, with a permit also required for any deck more than 16 inches above the lowest grade | Building Permit Fee Schedule effective 07/01/26: Decks (Open Deck) (under 600 sf) $105.00 |
| Electrical Permit | It depends | Before any electrical work, including extending circuit wiring, low voltage wiring, and... | ...(each meter), new, modification, upgrade, replacement or reconnection... |
| Fence Permit | It depends | fence height measured vertical to ground, including a fence set on top of a wall | Building Permit Fee Schedule effective 07/01/26 lists Fences, Residential: $35.00 +... |
| HVAC Permit | It depends | Before installing ductwork in a dwelling that has none or adding ductwork not covered by... | ...07/01/26 prices Mechanical, HVAC System Only for commercial work only ($100.00... |
| Plumbing Permit | Permit required | Any size | ...Inspection Fee Schedule effective 11/26/18: Inspection, New, for 1st fixture $30.00... |
| Pool Permit | It depends | above-ground pool surface area, where the water depth is 24 inches or more; in-ground pools require a permit at any size | ...Fee Schedule effective 07/01/26: Swimming Pool, Residential, Above Ground... |
| Shed Permit | It depends | accessory structure floor area | ...Permit Fee Schedule effective 07/01/26: Accessory Structure, Under 1000 sf... |
| Solar Permit | Permit required | Any size | ...07/01/26: Solar Power System, Residential (Roof and Ground Mounted) $100.00, plus... |
Roof Replacement Permit in other Maryland localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Baltimore County documents; the office above sets the local rules.
How this roof replacement permit page for Baltimore County was verified. 2 official sources: baltimorecountymd.gov, baltimorecountymd.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Baltimore County Department of Permits, Approvals and Inspections (PAI). Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare Roof Replacement Permit requirements across Maryland localities