IECC Third-Party Building Inspection Services
Additional information may be found under each listed county in Maryland.
Anne Arundel County
Allegheny County
Baltimore County
Calvert County
Carroll County
Caroline County
Cecil County
Charles County
Dorchester County
Frederick County
Garrett County
Kent County
Harford County
In addition to blower door testing, Harford County requires mechanical ventilation testing when the building envelope tightness is below a threshold.
- Harford County 2021 IECC Adoption
- 2021 IECC Residential Compliance Path Application
- 2021 IECC Residential Mechanical Ventilation Testing Certification Form
Howard County
Montgomery County
Prince George's County
Queen Anne's County
Somerset County
St. Mary's County
Talbot County
Washington County
Wicomico County
Worcester County
Energy Code Testing Building Inspections
Maryland mandated the 2021 International Energy Conservation Code on May 29, 2023, requiring all local jurisdictions to mandate it within 12 months.
Performance Testing Requirements:
Envelope tightness verified to be 3.00 ACH50 or less using a blower door test.
Duct leakage verified to be less than 4 cfm/100 square feet of conditioned living area. Systems serving all conditioned space may need to be tested and varies by local jurisdiction.