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As real estate continues to recover from the recession, large development projects are reappearing in the construction pipeline. And with these new developments comes more interest in assessing their triple bottom lines and effects on neighborhood sustainability. Neighborhood-scale action is now widely recognized as essential to achieving community-wide green goals. This recognition, and an absence of public policy leadership, has prompted a number of interest groups to create voluntary green rating tools aimed specifically at neighborhoods.
The growth of these systems is a global phenomenon. In addition to the United States and Canada, standardized neighborhood assessment tools are available in Europe, Asia, Australia, Latin America, and Africa. A majority are operated by green building or sustainability non-profits that support themselves, in part, on certification fees; while others offer simple, no-cost checklists or web-based rating processes. The more elaborate systems rate a myriad of characteristics and performance metrics, mainly in the built environment, and then award levels of certification based on a scale of points earned by an area’s green features. Examples of rating categories include walkability, energy and water use, materials and waste management, avoidance of sensitive resources, and human health and well-being. Notable neighborhood assessment tools in North America include:
Notable neighborhood systems outside North America include: BREEAM Communities in the United Kingdom, CASBEE for Urban Development in Japan, DGNB for Urban Districts in Germany, Green Star Communities in Australia and South Africa, Green Mark for Districts in Singapore, and Pearl Community-Estidama in Abu Dhabi.
All of the above are just the standardized tools designed for widespread application. Beyond these tools are numerous one-off neighborhood rating or indicator tools created by local groups, including San Antonio, Seattle, Baltimore, and Madison. The National Neighborhood Indicators Partnership provides valuable resources on local assessment systems, and two other community-scale rating tools with implications for neighborhoods are STAR Communities and the American Planning Association’s new Comprehensive Plan Standards for Sustaining Places.
Because of their relative newness (except for Enterprise, none of the standardized systems existed ten years ago), there’s been little academic investigation of neighborhood tools. But that’s likely to change as such systems start to produce cohorts with measurable outcomes and lessons learned. The field is ripe for comparative analysis; in a test, my firm is applying multiple tools to a single project to see how it scores under a range of tools. The University of Westminster in the United Kingdom has begun to track eco-city schemes globally, including many at the neighborhood level. Their latest survey found 43 frameworks, which suggests there could really be in excess of 100 tools worldwide, and a good share of those are likely scaled to the neighborhood or district level. Searching the Community Indicators Consortium database with the keyword "neighborhood" returns a mostly U.S. inventory of two-dozen one-off local systems.
All this activity has caught the eye of the International Organization for Standardization (ISO), whose Technical Committee 268 on Sustainable Development in Communities was created in 2012 to formulate global standards for sustainability assessment principles, vocabulary, and indicators. Through voluntary adoption of international standards, ISO hopes to foster better info-sharing and comparison of tool performance. A global survey of smart infrastructure indicators has been produced, and draft standards are in the works.
At the same time, funders in the United States have taken note of neighborhood tools by conditioning financial assistance on consistency with rating criteria. Nationally, the Department of Housing and Urban Development references LEED-ND alignment in its General Section grant guidelines and in its Choice Neighborhood and HOPE program criteria. At the state level, New York’s Energy Research and Development Authority recommends use of LEED-ND by its Cleaner, Greener Communities grantees. And at the local level, the Funders Network for Smart Growth and Livable Communities, in cooperation with the Urban Sustainability Directors Network, recently finished a survey of district-scale sustainability schemes to, in part, inform grant-making by member foundations like Summit, Surdna, and Kresge.
So, where do all of these options leave communities, developers, and designers who are interested in using neighborhood tools? There are big differences between each of the tools, and several criteria should be considered when making a selection, beginning with an alignment with user values. The systems outlined above provide valuable structures for communicating among stakeholders about neighborhood qualities and goals. But are they rating the right considerations? How triple is their bottom line? Who are the beneficiaries of a tool's particular rating? Most systems have a strong environmental bias, with token nods toward social equity and economic prosperity, but Enterprise is the exception, with its focus on housing and quality neighborhoods for low-income households.
The rating tools are also differentiated by type of eligible project. Only EcoDistricts, Green Neighborhoods, Walk Score, LCC, and 2030 Districts assess existing neighborhoods, while others focus on new construction (and equivalent major renovation). Except for EcoDistricts, LCC, and Green Neighborhoods, all have a minimum component requirement, such as residential parcels for Green Land Development, affordable housing for Enterprise, or infrastructure for Envision.
If a tool’s scope is appropriate, the next question is how participatory or inclusive it is. How locally adaptable is it? Is it a proprietary system applied by practitioners in relatively closed technical processes, or does it rely on open source, bottom-up engagement of residents? 2030 Districts excels in the latter respect, directly engaging neighbors to share data and take collective action toward common goals. Also, EcoDistricts freely distributes its framework, relying on grass-roots stakeholder engagement to assess conditions, tailor goals, and prioritize implementation projects.
What about verification? Do projects actually deliver on the environmental and social benefits they claim? Disappointingly, a minority of tools include onsite verification of green measures, and even fewer have ongoing reporting requirements to monitor progress toward commitments. In contrast, 2030 Districts is an exemplar, with its rating built on solid empirical results, gathered over time. Living Communities Challenge and Green Neighborhoods also monitor performance over time and fold that feedback into project operations.
How affordable and time-consuming are these tools? Some are free and require only minutes or hours to use, while others require tens of thousands of dollars and months to navigate an elaborate certification processes. Costs and time to use the tools are driven by the business models of each system and a wide range of complexity in the tools, from LEED-ND’s intricacy to the relative simplicity of Green Land Development.
Do we need so many standardized systems for rating neighborhood sustainability? Probably not. Some consolidation could make sense to break down silos and share overhead. Why have separate rating systems for buildings, landscape, and infrastructure, especially if integrative design is a goal of all three? On the other hand, there’s legitimate need for specialized tools, like EcoDistrict’s focus on process and ongoing management.
So far, the market response to most of the systems has been pretty timid, but in fairness, some of the slow rate of adoption can be partially explained by the recession. As the economy rebounds, the question will be which tools deliver enough value to get market traction and, ultimately, produce real impacts on the ground. Walk Score and its brethren are sure to prosper at the convenient, no-cost, Big Data end of the continuum, while at the other end, hand-crafted systems like EcoDistricts, 2030 Districts, and Green Neighborhoods should find grassroots support for producing bankable results, neighborhood-by-neighborhood.
Regardless of position on the continuum, impact and endurance are more likely to go to those systems that conform to emerging international standards, are affordable, and can verify and articulate tangible, equitable benefits. Or maybe local one-off tools will prove to be as good or better than standardized systems in making meaningful value propositions. Either way, the explosive growth in neighborhood rating tools over the past ten years has likely reached a plateau, and now it’s time to determine which ones are really adding value, and for whom.
Eliot Allen LEED AP-ND, is a Principal at Criterion Planners of Portland Oregon, and a specialist in using sustainability indicators to help designers and citizens fashion places that are measurably more livable and environmentally responsible. He has supervised over 200 LEED-ND neighborhood certification reviews for the U.S. Green Building Council and Green Building Certification Institute; is a member of the SITES rating system technical core committee; and faculty, facilitator, and global protocol advisor for EcoDistricts. Eliot is a co-recipient of EPA’s Climate Protection Award for the Chula Vista California Climate Action Plan; the Congress for the New Urbanism’s Charter Award for the SmartCode; and the APA Sustainable Communities Division Plan Award for the Imagine Austin Comprehensive Plan. He is a former chair of Portland’s Energy Commission and currently serves on the Urban Planning Task Group of the American Society for Testing & Materials.