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State Profile

Code Type: Commercial Residential
Current State Code 2021 IECC with amendments and ASHRAE 90.1-2019 2021 IECC with amendments
Effective Date
Adoption Date
State Amendments Yes Yes
State Code Analysis*
Enforcement Mandatory Statewide Mandatory Statewide
Can use COM/REScheck Yes Yes


Commercial Residential
Current Model Code ASHRAE Standard 90.1-2013 2015 IECC
No No
Previous Model Code
ASHRAE Standard 90.1-2010
Previous Model Code
2012 IECC

Model Code Savings Potential

Statewide Savings Potential (2010-2030) Residential Commercial
Cost $0.54B $0.43B
Energy (primary) 43MBtu 44MBtu

Consumer Cost Savings

Consumer Cost Savings Residential
per Home
per 1,000 ft2
Annual ($) $9 $98
Annual (%) 0.5%
Life-cycle (30 year) $139 $4320
Simple Payback 0.9 years 0.0 years
Positive Cash Flow 0.1 years


Code Type: Residential Commercial
Field Study Yes No
Training Program No No

Additional Information



    The Maryland Building Performance Standards (MBPS) referred to the 1993 BOCA International NBC. Chapter 13 of the 1993 NBC adopts by reference the 1993 MEC. In addition, the 1993 NBC allows conformance with ASHRAE/IES Standard 90-75 for single-family dwellings and multi-family residential buildings not over three stories high as an alternative to the MEC.

    In 1981 Maryland passed the Energy Conservation Building Standards Act, which established the MBPS requiring statewide conformance to the current edition of the BOCA NBC. The Act established a limited role for the Maryland Department of Housing and Community Development. The Act also grants them rulemaking authority to amend the MBPS through publications in the Maryland register and subsequent hearings on administrative actions.

    Senate Bill 64 passed both the Senate and the House and was signed by the Governor April 25, 2000. On January 1, 2001, the 2000 International Building Code, including the 2000 IECC, became effective (BCAP July/August 2001).

    The Department of Housing and Community Development published a notice to update the MBPS in the Maryland Register on January 13, 1997. They proposed to adopt the 1996 NBC, with amendments, into the MBPS. In its notice, the Department of Housing and Community Development did not propose to modify anything in the 1996 NBC relating to "energy." Comments on the proposal were to be submitted to the Department of Housing and Community Development. No public hearings were scheduled (three relevant hearings were held in the summer of 1996). That proposal was administratively adopted in April 1997.

    The Department of Housing and Community Development developed CODE LYNX, a computer database that provided easy access to the MBPS and the BOCA National Fire Prevention Code via the internet. CODE LYNX allowed users to search for any topic in the MBPS and Fire Code and to compare the BOCA based MBPS with amendments to those standards by local jurisdictons. All new construction, additions, and alterations to existing buildings had to comply with the code.

    Effective September 1, 1997, the MBPS referred to the Building Officials and Code Administrators (BOCA) International 1996 National Building Code (NBC). Chapter 13 of the 1996 NBC adopted by reference the 1995 Council of American Building Officials (CABO) Model Energy Code (MEC). The 1995 MEC adopted by reference ASHRAE/IESNA 90.1-1989.

    Effective September 20, 2004, the Maryland Building Performance Standards (MBPS)will be based on the 2003 IBC (including Chapter 13 - Energy Efficiency). Maryland Building Performance Standards (MBPS), based on the 2000 IECC. were mandatory statewide

    On July 1, 2007, Maryland Building Performance Standards were updated to the 2006 IECC.

    On October 1, 2009, Maryland Building Performance Standards were updated to the 2009 IECC.

    On January 1, 2012, Maryland Building Performance Standards were updated to the 2012 IECC.

    On January 1, 2015, Maryland Building Performance Standards were udpated to the 2015 IECC.

    On July 1, 2018, responsibility of administering MBPS was transferred to Maryland Department of Labor, Licensing & Regulation.

    State-Owned/Funded Buildings

    The final reduction goal of 10% below 2005 energy use for State buildings is superseded by legislation, but still technically part of State Law.

    All new or significantly renovated fully State funded buildings, K thru 12 public schools and new community college buildings over 7,500 gross square feet shall be constructed as High Performance Buildings.  A High Performance Building is one which achieves a Siver rating or better under the U.S. Green Building Council's Leadership in Energy and Environmental Design (LEED) rating system, a two Green Globes rating or better under the Green Building Initiatives's Green Globes rating system, or which complies with the Maryland Green Building Council's supplement to the International Green Construction Code (IgCC) enacted in November 2014.  Between 2009 and 2014 the state must pay for half the additional cost required for public schools to meet this standard.

    The State Buildings Energy Efficiency and Conservation Act requires all state agencies to reduce their energy consumption 5% by 2009 and 10% by 2010. The Department of General Services (DGS), in cooperation with MEA, set energy performance indices for each agency. Each state agency must conduct gas and electric analyses. The Act also requires state agencies to submit an Energy Conservation Plan to MEA by July 1, 2008, with Energy Conservation Measures (ECM) to achieve the reduction goals.

    ECMs cited in the bill include energy performance contracting, energy efficient lighting retrofits, water conservation devices, weatherization, efficient heating and cooling devices, and employee training.

    Maryland Life Cycle Cost Analysis Standards were established in 1990 requiring the DGS to include an evaluation of the use of renewable energy systems (including active and passive solar and wind systems) and energy efficient strategies (including the effect of insulation, the amount and type of glass, and direction of exposure) in creating standards for determining a building's life-cycle costs.

    Additionally, in determining life-cycle costs, an energy consumption analysis is required for each major piece of equipment in the building's chief energy-consuming systems (including cooling, heating, hot water, lighting, and ventilation systems).

    Adoption Process

    Local jurisdictions have up to 12 months after State adoption of new I-codes to amend & adopt State-adopted code for local use & enforcement.  For energy code, local jurisdictions are not permitted to weaken requirements adopted by State.

    Enforcement Process

    The state code is enforced by local jurisdictions that have adopted the code through plan review and inspections.

    Compliance Process

    The MBPS is mandatory statewide. Builders must demonstrate compliance to local government (cities, counties).

    Building professionals use REScheck and COMcheck materials to show compliance.