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More Green Resources

Click on a category below to view useful website links and resources pertaining to green buildings.

Please help us keep this list useful and current by submitting informative “green” links to: 



  • Residential Green and Energy Efficient Addendum to AI Reports

Appraisal Institute


  • Recognition of Energy Costs and Energy Performance in Real Property Valuation: Considerations and Resources for Appraisers, 2nd edition (a guide for the green narrative report)

Institute for Market Transformation and Appraisal Institute

  • PV Value™ Photovoltaic Energy Valuation Model spreadsheet tool helps determine the value of a new or existing photovoltaic system installed on residential and commercial properties

Sandia National Laboratories, a multiprogram laboratory managed and operated by Sandia Corp., a wholly owned subsidiary of Lockheed Martin Corp., for the U.S. Department of Energy’s National Nuclear Security Administration, and Solar Power Electric™

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  • California: One-stop site for information about energy resources in California

California Energy Commission: Consumer Energy Center

  • California: Information on solar programs, rebates, tax credits, installation, and interconnecting

Go Solar California

  • Advanced Buildings program transfers advances in building science and energy conversion systems into commercial practice by New York’s residential construction industry.

New York State Energy Research & Development Authority

  • Property Assessed Clean Energy (PACE) Program

PACE Financing

  • A list by states of green certification programs

PATH: A Public-Private Partnership for Advancing Housing Technology

  • Information about ENERGY STAR® homes and the HERS Index

U.S. Environmental Protection Agency and U.S. Department of Energy

  • The Better Buildings Initiative outlines President Barack Obama’s vision to make commercial buildings 20% more energy efficient over the next decade by catalyzing private sector investment through a series of incentives to upgrade commercial buildings.

White House, President Barack Obama

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  • Resources on water conservation, efficiency, and demand management for conservation professionals and the larger water supply community.

American Waterworks Association: Waterwiser®

  • In-depth technical and policy analyses and recommendations regarding green building and other sustainable practices

American Council for an Energy-Efficient Economy

  • Energy-efficient and green resources, including a number of Chicagoland resources

Elevate Energy

  • Education and resources for green construction

Appraisal Institute

Green Educational Offerings

Green Research Guide

  • Examples and goals of green leases

BetterBricks, the commercial building initiative of the Northwest Energy Efficiency Alliance

  • Education for home energy auditors

Building Performance Institute (BPI)

  • Independent organization to promote responsible management of the world’s forests—administers the FSC certification program

Forest Stewardship Council

  • Sustainable Building Assessment & Certification: Information on the Green Building Initiative (GBI), which provides sustainability assessment and certification services through the Green Globes® program

The Green Building Initiative

  • An interactive green community including a virtual trade show, articles, blogs, education, forums, and products


  • Up-to-date information on a variety of issues that affect construction of residential and commercial buildings

National Association of Home Builders

  • A downloadable file for greening the MLS. This site has resources to assist MLS offices in implementing data fields for energy-efficient and green homes.

National Association of Realtors

  • Independent nonprofit research and educational foundation to foster efficient and sustainable use of resources

Rocky Mountain Institute (RMI)

  • National standards and information about becoming a HERS rater or energy auditor

Residential Energy Services Network

  • Information on the LEED® certification program, research on sustainable building practices, publications, and more.

U.S. Green Building Council

  • U.S. regional and local green homebuilding organizations

U.S. Green Building Council

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  • A central online resource for rebate information

Database of State Incentives for Renewables & Energy Efficiency (DSIREUSA)

  • A database (still under construction) of ENERGY STAR® homes

Residential Energy Services Network

  • RESNET National Registry of all certified RESNET HERS Raters and homes that have been rated and issued a HERS Index Score since 2012

Residential Energy Services Network

  • DOE’s High Performance Buildings Database Provides Valuable Sustainable Buildings Data

U. S. Department of Energy

  • High Performance Federal Buildings Database

U.S. Department of Energy

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  • Design-oriented site for sustainable homes, natural material, and green technology

Jetson Green

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  • Information including PowerPoints, videos, and articles on energy-efficient wall systems

All Wall Co.

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  • Technical information on home building and panels

NAHB Research Center

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  • Paper: “Selling Into the Sun: Price Premium Analysis of a Multi-State Dataset of Solar Homes”

Electricity Markets & Policy Group, Energy Analysis & Environmental Impacts Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory    

  • Paper: “Tracking the Sun VII: An Historical Summary of the Price of Photovoltaics in the United States from 1998-2013”

Electricity Markets & Policy Group, Energy Analysis & Environmental Impacts Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory    

  • Paper: “An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California”

Energy Technologies Area, E.O. Lawrence Berkeley National Laboratory

  • Paper: “Exploring California PV Home Premiums”

Energy Technologies Area, E.O. Lawrence Berkeley National Laboratory

  • Paper: “Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices”

Energy Technologies Area, E.O. Lawrence Berkeley National Laboratory

  • Paper: “Market-Based Investigation of Residential Solar Installation Values in Oregon”

Energy Trust of Oregon

  • Solar energy information and resources, including calculating payback

  • Site classifies (premium, standard, economy) many major manufacturers of solar modules

EnergySage Inc.

  • Section B2-3-04 of the Fannie Mae Selling Guide,“Special Property Eligibility Considerations,” now has guidance on eligibility for properties with solar PV that are either owned or leased by the homeowner

Fannie Mae

  • Paper: “The PV Durability Initiative” scores five solar manufacturers from accelerated life testing and long-term field exposure data.

Fraunhofer Center for Sustainable Energy Systems    

  • Property Taxes and Solar PV Systems: Policies, Practices, and Issues”

North Carolina Solar Center, Meister Consultants Group, Inc.

  • Annual U.S. Solar Market Trends Report outlines different market forces shaping the adoption of PV across the U.S. PV pricing is included in these reports, and archived reports back to 2008 can be downloaded.

Interstate Renewable Energy Council  

  • Report: “Solar Ready Buildings Planning Guide”

National Renewable Energy Laboratory, operated for the Department of Energy by the Alliance for Sustainable Energy LLC

  • Examples of permanent documentation to make a utility worker or emergency response personnel aware there is a photovoltaic system on the property


  • Number of homes rated and average HERS index score in 2014 by state

RESNET Residential Energy Services Network 

Link to doc on AI website

  • Provides U.S. solar data, including slides and fact sheets

Solar Energy Industries Association

  • Report Shows U.S. Solar Industry Tops 1 GW of Installed Capacity for Third Straight Quarter. The summary is free, more specific information by state and market is available forpurchase.

Solar Energy Industries Association

  • Report: “How PV System Ownership Can Impact the Market Value of Residential Homes”

Sandia National Laboratories

  • Report: “Market Valuation Perspectives for Photovoltaic Systems”

Sandia National Laboratories

  • Report: “Standardizing Appraisals for PV Installations”

Sandia National Laboratories

  • Webinar: “Photovoltaic System Valuation Model—PV Value”

Sandia National Laboratories

  • “Quality Assurance: The Evolution of Residential Solar Leasing”

Solar Pro, Home Power Inc.

  • Paper: “Solar Photovoltaic Specification, Checklist and Guide”

U.S. Environmental Protection Agency

  • The below links contain maps of installed solar PV systems across the United States.The level of detail provided in each differs, although an appraiser can use it to get an idea of solar adoption rates and potential comparable properties with PV systems.

Various sources

Arizona Solar Map -

Berkeley, CA -

Boston, MA -

Cambridge, MA -

Los Angeles, CA -

Madison, WI -

New Jersey -

New Orleans, LA -

New York, NY -

Orlando, FL -

Portland, OR -

Riverside, CA -

Salt Lake City, UT -

San Diego, CA -

San Francisco, CA -

Silicon Valley Energy Map, CA -

Seattle Puget Sound Area -

Tallahassee, FL -

Vermont -

Vermont Energy Atlas - and

Washington County, OR -

Washington DC -

Wellfleet, MA -

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  • The Campus Solar Photovoltaic Installations database provides location and detail on solar PV systems installed on college and high school campuses across the U.S.Information provided includes cost, size, production estimates, installation type, and module and inverter manufacturer.

Association for the Advancement of Sustainability in Higher Education

  • Database of solar PV installations utilizing Enphase microinverter technology. Some sites in this interface show production over the lifetime of the PV system, multiple tilt and azimuth configurations, array layout, module manufacturer, and the company that installed the PV system and /or provides the monitoring service.

Enphase Energy Inc.

  • Spreadsheet on installed PV systems through the Commonwealth Solar incentive program. Information includes building type, city, ownership, system size, installation costs, and rebate approved.

Massachusetts Clean Energy Center

  • Open PV Project provides the real-time status of the solar PV market in the U.S. Information can be sorted by zip code, pre-incentive (gross) cost, and installation date.

National Renewable Energy Laboratory, U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy LLC

  • NYSERDA displays PV incentive program data, including location (by city), PV system size, costs (gross and incentive), module and inverter manufacturer, incentive amounts, and whether the PV systems are customer or third-party owned.Chart, table and map views can be generated in the web browser with this data.

New York State Energy Research and Development Authority (NYSERDA)   

  • Free service for sharing and comparing PV output data. Solar PV system owners give PVOutput permission to gather data from their own PV monitoring system to allow for comparing production data in a regional setting or across different components.

  • Details PV system name and address, PV system’s size, site photo, date commissioned (operational), inverter specifications, energy production and specific yield, and performance ratio

SMA Solar Technology AG

  • The Major Solar Projects List is a database of all ground-mounted solar projects, 1 MW and above, that are either operating, under construction, or under development. 

Solar Energy Industries Association

  • Solar PV installations are detailed if the system uses a Solectria inverter and the site name or installer name is known. 

Solectria Renewables   

  • California Solar Initiative (CSI) and California Public Utilities Commission (CPUC) data on installed PV systems.

State of California, California Energy Commission & California Public Utilities Commission

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  • Report: “NCEEA’s ENERCY STAR Market Impact Study”

Appalachian State University, North Carolina Energy Efficiency Alliance

  • Report: “CPUC Energy Efficiency Primer”

California Public Utilities Commission (CPUC)

  • Article: “An Early Look at Energy Efficiency and Contributory Value” presents case studies of residential properties in the greater Denver metro area

Colorado Energy Office

  • Report: “The Impact of Photovoltaic Systems on Market Value and Marketability”

Colorado Energy Office

  • Report: “Valuing the Financial Benefits of Energy Efficiency in the Multifamily Sector”

Elevate Energy   

  • Report: “Exploring California PV Home Premiums”

Ernest Orlando Lawrence Berkeley National Laboratory

  • Energy improvement cost analysis report

Grajny Consulting

  •  Article: “The High Cost of Deep-Energy Retrofits: A pilot project generates cost data on deep-energy retrofits of four buildings in Utica, New York”

Green Building Advisor, The Taunton Press Inc.

  • Book: Value Beyond Cost Savings: How to Underwrite Sustainable Properties

Green Building Finance Consortium

  • Academically reviewed papers on sustainable real estate, as well as links, case studies, and sustainability resources

The Journal of Sustainable Real Estate, University of San Diego’s Burnham-Moores Center for Real Estate

  • Blog post on Home Energy Pros: “Transaction Process Summit on High Performance Houses in Washington, DC, on Jan. 30, 2013”

Lawrence Berkeley National Laboratory

  • Article: “Certified Home Performance: Assessing the Market Impacts of Third-Party Certification on Residential Properties”

Building Rating

  • Report: “Integrating Sustainability and Green Building into the Appraisal Process”

The Journal of Sustainable Real Estate, American Real Estate Society

  • Article: “Green Homes Show Growth in a Recovering Market According to a New Report from McGraw Hill Construction”

Dodge Data & Analytics

  • Best practices for energy-efficient construction in a marine environment

U.S. Department of Energy

  • Article: “Seeing Green”

Valuation magazine, Appraisal Institute

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  • Book: Residential Green Valuation Tools has many case studies and examples on how to use solar PV valuation tools, including PV Value®

Appraisal Institute

  • Free appraiser’s guide for recognizing green building features in homes

The Appraisers Research Foundation

  • A map of LEED commissioned buildings in the United States (commercial) as well as LEED buildings per state, and functionality to virtually explore LEED projects


  • A map of USGC certified buildings in the United States (commercial)


  • Sample worksheet to calculate base load vs. heating/cooling costs

Masco Home Services Inc.

  • Green Energy Compass online tool for benchmarking, analysis, and reporting of energy for homes and small buildings

Performance Systems Development

  • "How to Calculate and Present Deep Retrofit Value for Owner Occupants" downloadable practice guide

Rocky Mountain Institute

  • Free roof azimuth tool assists in pinpointing a property’s azimuth

Solmetric Inc.

  • Free web-based residential energy calculator and web service that provides customized estimates of residential energy use, energy bills, and CO2 emissions.; Identifies potential energy-saving strategies and ranks in order of cost-effectiveness.

U.S. Department of Energy

  • Find a “Walk Score” for a property to determine ease of living a lifestyle that is less reliant on cars

Walk Score, Front Seat

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