Building Safety in Charles County, MD (2026)
7 rules for unincorporated Charles County, Maryland.
Verified from official government sources
Fire Sprinkler Requirements
Charles County requires automatic residential fire sprinklers in new townhouses and one- and two-family dwellings to be designed and installed to NFPA 13D, and forces a whole-house retrofit when an addition grows the structure more than 50% or an alteration touches more than 70% of it.
Charles County Residential Fire Sprinkler Rule
Some RestrictionsCharles County Code § 224-1.2(15), (17) (IRC §§ R313.1.1, R313.2.1)
R313.1.1 Design and installation. Automatic residential fire sprinkler systems for townhouses shall be designed in accordance with NFPA 13D. ... R313.2.1 Design and installation. Automatic sprinkler systems shall be designed and installed in accordance with NFPA 13D.
Childcare Center Rules
Charles County lets a childcare facility be classified Occupancy Group I-4 whenever the operation already qualifies as a day care occupancy under the State Fire Prevention Code, an amendment added to IBC Section 308.5.1 by the county's 2021-code adoption ordinance.
Charles County Childcare Facility Code Path
Some RestrictionsCharles County Code § 224-1.1(17)
IBC Section 308.5.1, add Exception 1 to read: "A childcare facility may be classified as I-4 when the facility is classified as a day care occupancy under the State Fire Prevention Code."
Green Building Code
Charles County lets a builder satisfy the energy code's above-code compliance section by meeting the silver rating of the ICC/ASHRAE 700-2015 National Green Building Standard, an alternative written into IRC Section N1102.1.1 and tied to state law at § 12-509(a) of the Annotated Code of Maryland.
Charles County Green Building Compliance Option
Light RestrictionsCharles County Code § 224-1.2(22)
Modify IRC Section N1102.1.1, Above code programs. Add to the end of Section N1102.1.1, "Compliance with the silver rating of the ICC/ASHRAE, 700-2015 National Green Building Standard as codified in § 12-509(a) of the Annotated Code of Maryland shall be considered to be in compliance with this code."
Building Permits
Charles County adopted the 2021 International Building Code as "The Building Code of Charles County," effective for all permit applications, and runs it through the Building Code Official in the Department of Planning and Growth Management. The county carved out only a few narrow exemptions from IBC's permit requirement: small farm outbuildings, short-lived open tents, and low flagpoles.
Charles County Building Permit Exemptions
Some RestrictionsCharles County Code § 224-1.1(7)-(9)
IBC Section 105.2, Work exempt from permit, add under "Building": 14. Non-Habitable outbuildings for verifiable agricultural use on agriculturally zoned parcels of five acres or more. ... IBC Section 105.2, Work exempt from permit, add under "Building": 15. Tents and membrane structures that are open sided, with no cooking facilities contained within, for use less than 180 days, up to 2,400 squ...
Electrical Permits
Charles County adopted the 2020 National Electrical Code as its Electrical Code. A homeowner who wants to wire their own residence cannot just pull a standard trade permit; they must first pass a written exam through the Board of Electrical Examiners and get a homeowner's electrical permit from the Inspections and Permits Division.
Charles County Homeowner Electrical Wiring Permit
Some RestrictionsCharles County Code § 234-1
The County Commissioners of Charles County do hereby define that a homeowner may be granted a permit for installation of electrical wiring in one's own residence upon demonstrating to the Board of Electrical Examiners, through passage of a written test developed by said Board, that the homeowner possesses adequate knowledge of electrical wiring to be able to install systems correctly and protec...
Plumbing Permits
Charles County adopted the 2021 International Plumbing Code as part of its Building Code, administered by the Building Code Official in Planning and Growth Management. Local amendments control how water service lines are sized, how far they must sit from building sewers, and whether a private sewage disposal option applies where a sewer connection is required.
Charles County's Adopted Plumbing Code Rules
Some RestrictionsCharles County Code § 224-1.4
IPC Section 603.1, Size of water service pipe, should read as follows: "The water service pipe shall be sized to supply water to the structure in the quantities and at the pressure required in this code. The minimum diameter of water service pipe shall be in accordance with the Charles County Water & Sewer Ordinance." ... IPC Section 701.2, Sewer required, remove the statement "or an approved p...
Building Inspections
Charles County requires a separate footing inspection before pouring deck concrete and a separate framing inspection before any decking is installed on decks with under four feet of clearance, added as new IRC subsections by § 224-1.2(6).
Charles County Deck Footing and Framing Checks
Some RestrictionsCharles County Code § 224-1.2(6) (IRC §§ R109.1.5.2, R109.1.5.3)
R109.1.5.2 Deck footing inspection for decks. A footing inspection shall be required for all deck applications. Deck footing inspections shall be approved prior to the placement of concrete, and prior to the beginning of any framing that obstructs access to all footing excavations, such as the placement of beams and/or joists with a head clearance less than 4' above grade. R109.1.5.3 Deck frami...
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