Gaithersburg's Building Safety: The Rules That Matter

Every city handles building safety a little differently. In Gaithersburg, Maryland, there are 4 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Carbon Monoxide Detectors

Gaithersburg's code does not set a citywide carbon monoxide alarm mandate for all homes, but it does require one for licensed short-term rentals: working CO alarms in every bedroom and on every level, tied to the Chapter 11 fire safety code.

Key details: CO alarm mandate scope: Licensed short-term rentals, §18AA-3.1(3). Placement required: Every bedroom and every level. Cross-referenced code: Chapter 11 Fire Safety Code (NFPA 1/101, 2024 ed.). Compliance method: Signed declaration in license application. Enforcement: License revocation, municipal infraction.

A short-term rental found without required carbon monoxide alarms is out of compliance with its Sec. 18AA-3.1(3) license condition; the city manager can order correction, and an uncorrected violation can lead to license revocation under Sec. 18AA-8 and a municipal infraction fine under Sec. 18AA-9, set by city council resolution.

Electrical Permits

Gaithersburg requires a city permit and a licensed master electrician for all electrical work inside city limits under City Code Chapter 7. The city has adopted the 2020 NFPA 70 National Electrical Code with local amendments, and enforces it through the city manager or a designee rather than Montgomery County.

Key details: Code adopted: NFPA 70, 2020 Edition NEC. License required: Master electrician or limited license. License term: Up to 2 years. Bond/insurance: $1,000 bond or $300k/$100k insurance. Suspension power: Up to 60 days by city manager.

Violating Chapter 7 is a municipal infraction enforced under § 1-9, with the maximum civil penalty for each initial and repeat violation set by council resolution (§ 7-16). Concealing wiring before inspection triggers the same penalty track under § 7-11. The city manager can also issue a stop-work order for nonconforming installations (§ 7-12) and suspend a violator's license for up to sixty days, or revoke it on a repeat violation (§ 7-6).

Building Permits

Gaithersburg requires a separate building permit for every legal address and every separate building at that address before construction begins. City Code § 5-3 amends the 2021 International Building Code's permit section to remove several standard exemptions, and the Planning and Code Administration's Permits and Inspections Division reviews and issues every permit.

Key details: Permit unit: one per legal address, one per building. Issuing office: Planning and Code Administration, Permits Division. Fee-setting body: Mayor and City Council. Appeal deadline: 17 days to Board of Appeals. Enforcement tool: withholding of inspections and permits.

Starting work without the required permit, or continuing after the Building Official finds a violation, exposes an owner or contractor to a municipal infraction under amended Subsection 114.4, punishable by a fine set by the Mayor and City Council under §§ 1-9 through 1-11 of the City Code, with each day of the violation a separate offense. The Building Official may also withhold further permits or inspections on the project under Subsection 115.6 until violations are fixed and fees paid.

Plumbing Permits

Gaithersburg adopts the 2021 International Plumbing Code as its plumbing code under City Code § 5-14, but § 5-15(1) hands almost all of the actual regulation to the Washington Suburban Sanitary Commission. WSSC's own Plumbing and Gasfitting regulations and inspections govern site and building plumbing work; the City's adopted IPC applies only to whatever WSSC's rules do not already cover.

Key details: Adopted code: 2021 IPC, City Code § 5-14. Actual enforcement: Washington Suburban Sanitary Commission. City code applies: Only where WSSC rules are silent. Overtime inspections: 48 hours advance notice required. Appeal deadline: 17 days to City Board of Appeals.

Section 5-15 carries no standalone penalty clause of its own, so a plumbing-code violation not otherwise addressed by WSSC's own enforcement defaults to City Code § 1-7's general penalty: a fine of up to $500, imprisonment for up to 90 days, or both, with each day a violation continues treated as a separate offense.

The Bottom Line

Gaithersburg's building safety rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Gaithersburg is broadly strict or permissive.

Keep in mind that Gaithersburg can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.