Frederick County's Department of Permits and Inspections at 30 North Market Street provides permitting, inspection and code enforcement for the county, and its reach is unusually wide: county approval is required for all new construction in the county or in the municipalities, with the exception of the City of Frederick and Mount Airy, which are responsible for their own building permits. For a property inside any other town, the zoning certificate is applied for at the town before the building permit application is made to the county.
The county's second cost layer is not a permit fee at all. Impact fees are required on all new development to cover a proportionate share of the capital facilities needed to accommodate its effect on public schools and libraries, and they are set on their own schedule beside the permit fee. The department publishes a residential submittal checklist that carries the fee for each type of construction, takes card and online payments through its portal with a service charge, and warns that official payments are only ever made through the county's verified portal.
This guide covers Frederick County and the towns for which it issues building permits, including Brunswick, Emmitsburg, Middletown, Thurmont, Walkersville and Woodsboro. The City of Frederick issues its own building permits. Mount Airy, which straddles the Carroll County line, has transferred its permit processes to the Carroll County Bureau of Permits and Inspections in Westminster, including for the part of the town in Frederick County, apart from signs, fences, driveways, banners and zoning certificates, which the town keeps.
Two towns keep their own permits. County approval is required for all new construction in the county or in the municipalities, with the exception of the City of Frederick and Mount Airy, which are responsible for their own building permits. For every other town, the zoning certificate is applied for at the town office before the building permit application is made to the county — the order matters, and the county will not process without it.
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Get a free quote →What requires a building permit in Frederick County?
Typically permit required
- New construction anywhere in the county or in its towns other than the City of Frederick and Mount Airy
- Modifications, alterations or a change of use of any building or structure
- Accessory structures — sheds, pools, decks, garages and signs — with a zoning certificate from the town where the property sits inside one
- New buildings, additions and any structural work on an existing building
- Interior alterations that reconfigure space, add plumbing fixtures or extend circuits, under the building or residential code and the Maryland Building Rehabilitation Code
- Decks, accessory structures above the local exemption threshold, retaining walls and swimming pools, including above-ground pools
Often exempt
- Redecorating and minor repair work — painting, wallpaper, flooring, cabinets, countertops and similar finish work — which the department states needs no permit
- Painting, wallpapering, interior finishes, cabinets, flooring and trim
- Like-for-like replacement of windows and doors in the same opening
- Small detached accessory structures below the jurisdiction's exemption threshold and fences below its height limit — the zoning rules still apply
- Minor repairs that do not remove or alter structural members
What is actually local, and what is not
The code editions are the state's. Frederick County's layer is the enforcing office and its amendments to the building and residential codes, its fee schedule, its grading ordinance and its stormwater programme under MDE criteria, and the zoning certificates the towns issue ahead of the county permit, and the school and library impact fees that ride on new development.
Maryland enforces one statewide set of codes, the Maryland Building Performance Standards (COMAR 09.12.51), through the county or city permit office, which may amend the building and residential codes for local conditions. Maryland rules
Who handles permitting in Frederick County?
The Department of Permits and Inspections is the enforcing office, issuing building, electrical, plumbing, life safety and fire, grading and driveway permits and inspecting them; its Environmental Compliance and Stormwater Engineering section sits in the same building. The Livable Frederick Planning and Design Office handles planning, the towns issue their own zoning certificates where the property is inside one, and the department appoints a small business coordinator and a planning and permitting ombudsman for applicants who need a route through.
| Detail | Information |
|---|---|
| Department | Frederick County Department of Permits and Inspections |
| Office | 30 North Market Street, Frederick, MD 21701 |
| Phone | (301) 600-2313 |
| Hours | Monday to Friday, 8:00 am to 4:00 pm |
| Plan review | Office of Plan Review, through the department line (301) 600-2313; plans submitted electronically through ProjectDox |
| Payments | County portal only; card and debit carry a service fee, online cheque a flat charge |
Not sure this scope needs a permit?
Get a free quote →In 2025, building permits issued in unincorporated Frederick County authorized 395 new privately owned housing units, 362 of them single-family homes, according to the U.S. Census Bureau Building Permits Survey.
Permit types
Residential permits
A Frederick County house project files through the county portal with a plot plan showing every property line, the acreage or square footage, the house and the proposed work, the setbacks in all directions, the owner's name and address, the well and septic locations where they apply, the driveway and any other existing structures. Inside a town, the town's zoning certificate comes first — and a shed under 150 square feet may still need one there even where the county would not require a building permit. Contractors improving a house hold the state home improvement licence.
Commercial permits
Commercial work in Frederick County runs plan review through the department's Plan Review Services, with a third-party inspection programme available for commercial projects and the Maryland Accessibility compliance form filed with the application. Impact fees for schools and libraries are assessed on new development, environmental compliance and stormwater engineering review the site, and life safety and fire permits are issued by the same department.
Prior approvals, plan review and the local clock
In Frederick County the department's own environmental compliance and stormwater engineering section reviews the site, the county's forest resource ordinance and the state Forest Conservation Act apply once the application area reaches their thresholds (40,000 square feet under the state Act), and the Monocacy and Catoctin corridors bring floodplain review into the file. Maryland sets no deadline for deciding a building permit (though since 1 October 2026 the office must decide within 30 days whether a housing application is complete) — Frederick County publishes its own targets, and they are the number to plan against.
Rather talk it over?
Call 1-855-478-4290 →Maryland licenses home improvement contractors through the Maryland Home Improvement Commission and home builders register with the Attorney General; trade licences are mostly state licences, but some counties and WSSC license or register trades themselves. Maryland rules
Frederick County permit costs and fees
Fees follow the county's fee ordinance, with the residential submittal checklist carrying the figure for each type of construction and the trade application forms listing their own categories.
| Item | Fee or rule |
|---|---|
| Residential permits | By type of construction, listed on the residential submittal checklist and the fee ordinance |
| Trade permits | Electrical, plumbing and utility fees listed on the application forms themselves |
| Impact fees | Required on all new development for schools and libraries, on their own schedule |
| Card payments | A service fee of two and a half percent of the transaction total |
| Online cheque | A flat service fee per transaction |
| Zoning certificate | Charged by the town where the property is inside one, before the county application |
Pay only through the county's portal. The county warns that official application payments are only made through the county's verified portal and that applicants should not respond to, click links in, or send payment to questionable emails purporting to come from Permits and Inspections, the Livable Frederick Planning and Design Office or the Division of Planning and Permitting. Invoices arriving by email are the thing to check twice.
Rather not deal with the Frederick County building department?
Get a free quote →Trade permits and who may pull them
Permit required
- Work inside a town other than the City of Frederick or Mount Airy — the town's zoning certificate before the county permit
- Electrical — state-licensed master electrician; separate electrical permit
- Plumbing and gas — state-licensed master plumber or gas fitter; separate plumbing and gas permits
- HVACR — state-licensed HVACR contractor; mechanical permit
- Fire protection, alarms and sprinklers — fire marshal review, state or local, with the building permit
Typically exempt
- Like-for-like fixture, receptacle and switch replacement where the licensing boards' rules allow it
- Low-voltage and communications wiring below the local permit threshold
Trade work is permitted separately and inspected locally or, for electrical work in many counties, by a state-certified private inspection agency. Maryland rules
How to apply for a Frederick County building permit
Zoning certification, grading and sediment control, stormwater, forest conservation and Critical Area review run ahead of the building permit.
The home builder registration number (required by state law for new homes) or, where the office asks for it, the Maryland Home Improvement Commission licence number goes on the application.
The local application with the building, residential and energy code submittals the scope requires, and trade permits alongside.
Reviewers in the local office check the building, residential and energy codes as the jurisdiction amended them; corrections are answered in writing.
Fees follow the jurisdiction's ordinance and are due before issuance.
Footing to final by permit number, then the use and occupancy certificate that closes the permit.
Review, corrections and what actually causes delay
Frederick County reviews through its portal, where applicants track status, and the department's own reputation among contractors is for staff who will talk a scope through before it is filed. What delays a file here is a town zoning certificate not yet obtained, a plot plan missing setbacks or well and septic locations, and an impact fee discovered after the budget was set.
Want this handled start to finish?
Get a free quote →Inspections in Frederick County
Inspections follow the adopted codes' required sequence — footing, foundation, framing, rough trades, insulation and final — and are requested from the local office by permit number. Work that passes final receives a use and occupancy certificate for new buildings and changes of use, or a final approval on the permit for everything else. Frederick County inspects in the sequence its guidance sets out — footing, location where applicable, steel, bond or trench where applicable, backfill, framing, close-in and final — with non-residential work adding site compliance and life safety items; inspection requests made through the county portal before 2:00pm are scheduled for the following business day, and each permit includes two inspections per inspection type before a re-inspection fee applies.
Frederick County permit search and official resources
- Frederick County Permits and Inspections — the department, its sections and current permits
- Building permits and zoning certificates — the municipal exceptions and the zoning certificate order
- Frederick County permitting fees — the fee ordinance, checklists and payment service charges
- Maryland Building Performance Standards — the statewide code adoptions from the Department of Labor's Building Codes Administration
- Maryland Home Improvement Commission — home improvement contractor licensing and the guaranty fund
- Home Builder Registration Unit — new home builder registration with the Attorney General
Inspections are where schedules slip.
Get a free quote →Frequently asked questions
Does Frederick County permit inside the towns?
Yes, for all of them except the City of Frederick, which issues its own building permits, and Mount Airy, whose permits are processed by Carroll County. Inside the other towns, the zoning certificate is obtained from the town first.
What goes on the plot plan?
All property lines, the square footage or acreage, the house location with the proposed project, setbacks in all directions, the owner's name and address, well and septic locations if applicable, the driveway location and any other existing structures.
Do I need a permit to redecorate?
No. The department states that redecorating and minor repair jobs such as painting, wallpaper, flooring, cabinets, countertops and similar finish work do not require a permit.
What are impact fees?
Charges on all new development covering a proportionate share of the capital facilities needed for public schools and libraries, set on their own schedule beside the permit fee.
How do I pay?
Through the county's verified portal only, by card, debit or online cheque; card payments carry a percentage service fee and online cheques a flat charge.
Which code edition applies?
The 2021 editions of the International Building Code, International Residential Code and International Energy Conservation Code with Maryland modifications, effective statewide on May 29, 2023 under the Maryland Building Performance Standards, with local enforcement required from May 29, 2024.
Simplify Frederick County permitting with Alliance Permitting
Frederick County's reach across its towns is the thing most applicants get wrong. We confirm which office owns the permit before anything is filed, take the town's zoning certificate first where one is needed, and budget the impact fees with the permit rather than after it.
Ready to break ground in Frederick County sooner?
Send us the scope and the parcel. We confirm the review path with the Frederick County Department of Permits and Inspections, assemble the submittal, file it, and track it through issuance — corrections included.
More Maryland permitting guides
More Maryland permitting guides
This guide is provided by Alliance Permitting for general information about Frederick County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.