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The U.S. Department of Energy and the North Carolina Clean Energy Technology Center are excited to announce that a new, modernized DSIRE is under construction. The new version of DSIRE will offer significant improvements over the current version, including expanded data accessibility and an array of new tools for site users. The new DSIRE site will be available in December 2014. Staff are currently working hard on the new version of DSIRE but are also maintaining the content of the current version of DSIRE. Thank you for your continued support and patience during this transition. We hope you are as excited for December as we are!

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Incentives/Policies for Renewables & Efficiency

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Special Property Assessment for Renewable Heating & Cooling Systems   

Last DSIRE Review: 10/15/2014
Program Overview:
State: Maryland
Incentive Type: Property Tax Incentive
Eligible Renewable/Other Technologies: Solar Space Heat, Geothermal Heat Pumps, Geothermal Direct-Use
Applicable Sectors: Commercial, Industrial, Residential
Amount:Eligible property is assessed at no more than the value of a conventional system
Web Site:
Authority 1:
Date Effective:
Md Code: Property Tax ยง 8-240
07/01/2008 (as amended)

Title 8 of Maryland’s property tax code includes a state-wide special assessment for solar and geothermal heating and cooling systems. Under this provision, such systems are to be assessed at not more than the value of a conventional system for property tax purposes if no conventional system exists in the building. If a solar or geothermal heating and cooling system is installed in addition to a conventional system in a building, the combined system may be assessed at no more than the value of the conventional system -- essentially a full exemption for the qualifying equipment.

Geothermal heating and cooling systems were added as eligible for this incentive by H.B 377 (2008) for tax years beginning after June 30, 2008 (the property tax year begins on July 1st). The 2008 law also clarifies how different types of solar energy systems are treated for property tax purposes. As indicated above, solar heating and cooling systems are granted a special assessment that negates their increased value compared to conventional systems. Solar photovoltaic (PV) and solar hot water systems in contrast receive a full exemption from real property taxes under a separate provision in the tax code. Click here for more information on this exemption.

  Department of Assessments and Taxation
Real Property Valuation Division
300 W. Preston Street
Baltimore, MD 21201-2395
Phone: (410) 767-1199
Web Site:
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Disclaimer: The information presented on the DSIRE web site provides an unofficial overview of financial incentives and other policies. It does not constitute professional tax advice or other professional financial guidance, and it should not be used as the only source of information when making purchasing decisions, investment decisions or tax decisions, or when executing other binding agreements. Please refer to the individual contact provided below each summary to verify that a specific financial incentive or other policy applies to your project.

While the DSIRE staff strives to provide the best information possible, the DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. make no representations or warranties, either express or implied, concerning the accuracy, completeness, reliability or suitability of the information. The DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. disclaim all liability of any kind arising out of your use or misuse of the information contained or referenced on DSIRE Web pages.

Copyright 2014 - 2015 North Carolina State University, under NREL Subcontract No. XEU-0-99515-01. Permission granted only for personal or educational use, or for use by or on behalf of the U.S. government. North Carolina State University prohibits the unauthorized display, reproduction, sale, and/or distribution of all or portions of the content of the Database of State Incentives for Renewables and Efficiency (DSIRE) without prior, written consent.