Adopted edition
IRC 2021 (Maryland Building Performance Standards)
Effective
State · MD
Maryland building codes at a glance.
MBPS is the statewide floor (IRC 2021); each county may adopt later editions or layer on amendments. Wind design 90–115 mph statewide.
MD Maryland
IECC zones 4A · ASCE 7 design wind 90–115 mph
Adoption model
County adoption
Permits issued: Mixed (state + local)
Coverage status
Indexed
Parcel layer + adopted-edition library + amendment overlay all live.
Climate zones (IECC)
4A
Drives R-value, fenestration U-factor, and air-leakage envelope rules.
Design wind speed
90–115 mph
ASCE 7 Risk Category II, 3-second gust at 33 ft. Fastener spec follows.
Special zones
- HVHZ (not applicable)
- WUI (not applicable)
- FEMA SFHA overlays (present)
Compliance track
What's required to build here.
MBPS sets statewide floor based on IRC 2021. Counties may adopt later editions or add amendments. MoCo, PG, AA, Baltimore have own ordinances.
Statute reference: dhcd.maryland.gov/Codes/Pages/default.aspx
Sample counties
How MD varies inside the state.
4 of the highest-volume counties in Maryland, with notes on local rules that diverge from the state floor.
§01
Montgomery
Local amendments on top of MBPS
§02
Prince George's
Local amendments on top of MBPS
§03
Anne Arundel
IRC 2021 + AA amendments
§04
Baltimore (county)
IRC 2021 + Baltimore amendments
County directory
All 24 counties in Maryland.
Each county page shows the adopted edition, county-level amendments, and permit-office contact.
City directory
13 cities indexed in Maryland.
City pages list local amendments, the parent county, and the local permit office.
Working in Maryland?
Pull an address-level code packet for any property. SkyCanvass resolves the parcel, looks up the jurisdiction's adopted edition + amendments, and emits a cited packet ready for permit submittal.
For state-vs-state comparisons see the state comparison view, or browse the state directory.
Pull a MD code packet.
Free to start — property lookups, state code access, the hail map, and your first storm report on us. No credit card required to look up an address.