Montgomery County, MD Building Safety: Green Building Code (2026)
Key Facts
- Governing rule
- COMCOR 08.00.02 (Reg. No. 13-24)
- Codes adopted
- 2021 IBC, IECC, IgCC, IMC, IFGC, IRC, ISPSC, IEBC
- Enforcing agency
- Dept. of Permitting Services
- Effective date
- December 10, 2024
- Excludes
- Rockville, Gaithersburg, Takoma Park (own codes)
Summary
Montgomery County requires new construction and major renovations to meet the 2021 International Green Construction Code, adopted alongside the IBC and IECC by executive regulation and enforced by the Department of Permitting Services.
This regulation is adopted under Sections 8-13, 8-14, and 51-12 of the Montgomery County Code (MCC), 2014, as amended, and applies to the construction, alteration, addition, repair, removal, demolition, use, location, occupancy, and/or maintenance of all buildings, structures, and swimming pools and spas... This regulation adopts the 2021 editions of the IBC, the IECC, the IgCC, the IMC, the IFGC, the IRC, the ISPSC, and the IEBC, with amendments necessary to achieve uniformity and consistency with Maryland and Montgomery County laws and ordinances.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-90: Montgomery County Code contains legislation effective through May 7, 2026 | Zoning Updated Effective: April 13, 2026 | COMCOR Regulations effective as of July 1, 2026).
Full Breakdown
Executive Regulation COMCOR 08.00.02, adopted under County Code §§ 8-13, 8-14, and 51-12, adopts the 2021 editions of the IBC, IECC, IgCC (International Green Construction Code), IMC, IFGC, IRC, ISPSC, and IEBC for all buildings, structures, and swimming pools/spas countywide, with amendments for consistency with Maryland and County law. It replaced the County's former standalone Energy Efficiency and Environmental Design program (once County Code Article VII, §§ 8-46-8-52, repealed 2017) by folding that content into this single ICC-code adoption via Reg. No. 13-24, effective December 10, 2024. Rockville, Gaithersburg, and Takoma Park administer their own building/energy codes and are not governed by this COMCOR chapter.
Violations & Fines
Building without a permit that meets the adopted 2021 IgCC/IECC standards is a stop-work and permit-denial matter handled by DPS plan review and inspection; there is no separate fine schedule in the regulation itself.
Frequently Asked Questions
Does Montgomery County have its own green building code?
Does this apply inside Rockville or Gaithersburg?
Sources & Official References
Other rules in Montgomery County
Compare Montgomery County to another location·View the Maryland building safety overview
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