Green Roofs - Living Architecture Monitor - Fall 2009 - (Page 17)

A GREEN ROOF CAPITOL CITY ACHIEVING WASHINGTON, D.C. MAYOR ADRIAN FENTY’S VISION OF 20 PERCENT GREEN ROOFS IN 20 YEARS By Dr. Hamid Karimi FINANCIAL INCENTIVES Washington has taken a “carrot-and-stick” approach that has encouraged green roof construction. The carrot is a green roof subsidy program that offers USD $5 per square foot, up to USD $20,000 per project for any green roof project in the District. A second subsidy program is under development that will target at green roof retrofits on larger buildings. In May of 2009, the District enacted a new stormwater fee-structure based on the amount of impervious surface present on individual property parcels. This fee, which is utilized to cover the costs of managing the city’s stormwater runoff, is complemented by a similar fee system implemented by the District Water and REGULATORY FRAMEWORK At the end of 2006, the District’s City Council passed the Green Building Act which mandated construction of government-owned buildings over 10,000-square-feet meet Leadership in Energy and Environmental Design (LEED®) Silver certification standards by 2008. The Act also called for development or rehabilitation of commercial properties to meet progressively more stringent LEED®-certification standards starting in 2009, culminating in their meeting LEED® Silver by 2012. Although LEED® ratings are flexible and do not require vegetated rooftops, this Act, along with the new stormwater fee, will ultimately result in more green roofs over time. D.C. is also in the process of implementing new stormwater management regulations that, as its main component, require developers to first consider the use of LID techniques (such as green roofs) to manage their stormwater, and gives priority in permitting to those who do. FRANKLIN D. REEVES CENTER (A D.C. GOVERNMENT BUILDING) WITH A 4,000-SQUARE-FOOT INTENSIVE GREEN ROOF INSTALLED IN 2007 These new regulations, and a guidebook for their implementation, are currently pending. Approximately 1/3 of D.C. lands are controlled by the federal government. In order for the District to meet its stormwater goals we must work with federal agencies to capture and Images courtesy of Susan Riley, District Office of Property Management (OPM), Washington, D.C. T he District of Columbia (District) has accomplished much since the Green Roofs for Healthy Cities conference was held in Washington D.C. in 2005. When the conference took place in the District, green roof construction in the nation’s capital was in its infancy and few roofs had been constructed. Over the past several years, the District Department of the Environment (DDOE) has undertaken a number of steps to build upon its early successes to accelerate construction of green roofs as a major component of the city’s stormwater management and green infrastructure strategy. The District has adopted a three-pronged approach toward the adoption of vegetated rooftops that includes: 1) Creating financial incentives; 2) Changing the regulatory framework of development; and 3) Educating property owners. Sewer Authority to provide funding for the City’s combined sewer system Long Term Control Plan (LTCP). These fees encourage construction and retrofitting of existing buildings with green roofs and other low-impact development (LID) techniques by requiring property owners, including public agencies, to pay for their stormwater inputs. In addition to the “stick” of the stormwater-based fees, in the coming year the District will develop a mechanism to reward those properties that reduce impervious areas by using LID techniques (such as green roofs) with a lower fee that can be up to 50 percent of their base rate.

Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Fall 2009

Green Roofs - Living Architecture Monitor - Fall 2009
City Power
Cities Alive!
Welcome to Toronto
Part 2 of 2: Risk-Reduction Tools
Toward Bird-Friendly Living Architecture
Cities Leading by Example
Q&A: On the Roof With...
7 Million-Square-Feet
Seeding the Future
A Green Roof Capitol City
From "Beantown" To "Greentown"
Beyond the Debate
A More Beautiful Baltimore
Policy Support
Seattle's Green Factor
Understanding The Green Roof Evapotranpiration Process
GHRC Professional Development Calendar
Welcome New Corporate Members
The Girl Scout Knows Best

Green Roofs - Living Architecture Monitor - Fall 2009