Top Green Building Trends

By Tom Breunig, Earth Advantage

We believe it’s going to be a promising year for the green building industry -- despite flat market conditions for conventional homes, we’ve seen market share for high performance homes increase from 18.5 to 23 percent in the Portland Metro area alone. In both Seattle and Portland 1 of every 4 new homes is certified. Clearly the time has come for energy efficiency, and with it, healthier green homes.

Affordable green. Many consumers typically associate green and energy-efficient homes and features with higher costs. However, the development of new business models, technologies, and the mainstreaming of high performance materials is bringing high-performance, healthy homes within reach of all homeowners. Leading the charge are affordable housing groups, including Habitat for Humanity and local land trusts, now building and selling LEED® for Homes- and ENERGY STAR®-certified homes across the country at price points as low as $100,000. In the existing homes market, energy upgrades are now available through new programs that include low-cost audits and utility bill-based financing. Through such programs as Clean Energy Works Oregon, and Solar City’s solar lease-to-own business model, no up-front payment is required to take advantage of energy upgrades.

Sharing and comparing home energy use. The website Earth Aid (www.earthaid.net) lets you track home energy usage and earn rewards for energy savings from local vendors. You can also elect to share the information with others on Earth Aid to see who can conserve the most energy. When coupled with other developments including home energy displays, a voluntary home energy scoring system announced by the Department of Energy, and programs including Oregon and Washington’s Energy Performance Score, a lot more people will be sharing -- and comparing -- their home energy consumption.

Community purchasing power. Neighborhoods interested in renewable energy will increasingly band together to obtain better pricing on materials such as solar panels and on installation costs. The Solarize Portland program was initiated by local neighborhood leaders in Southeast Portland who wanted to increase the amount of renewable energy generated in their area by working together as a community. The program is structured so that the price of solar panel installation decreases for everybody as more neighbors join the effort. Group purchasing creates a 15-25 percent savings below current prices. This group discount, in addition to current available tax credits and cash incentives, gives participants a significant cost savings.

Intersection of smart homes, “grid-aware” appliances, and smart grid. While many residential smart meters have been installed, the customer interface that will allow homeowners to track energy use more accurately are not yet in place. In the meantime, manufacturers are increasingly introducing appliances that are “grid-aware.” These appliances are endowed with more sophisticated energy management capabilities and timers, offering homeowners machines that monitor and report their own electricity usage and that increase or decrease that usage by remote command.

Accessory dwelling units. These small independent units, which can be used for offices, studios, or in-law space, are the ideal size for energy savings and sustainable construction.

Rethinking of residential heating and cooling. Advances in applied building science in the US and abroad have resulted in homes that are so tightly sealed and insulated that furnace-less, ductless homes are now a reality. The increasingly popular “Passive House” standard, for example, calls for insulation in walls and ceiling that is so thick that the home is actually heated by everyday activity of the occupants, from cooking to computer use. Even in ENERGY STAR-certified homes builders are now encouraged to bring all ductwork inside the insulated envelope of the house to eliminate excess heat or cooling loss, and to use only small but efficient furnaces and air conditioners to avoid wasting power. Geothermal heating and cooling are another option gaining broader acceptance.

Residential Grey Water use. With water shortages looming in many areas including the Southwest and Southern California, recycling of grey water – any household wastewater with the exception of toilet water – is gaining traction. Benefits include reduced water use, reduced strain on septic and stormwater systems, and groundwater replenishment. Although many cities have been slow to legislate on grey water use, some communities have increased the amount of allowable grey water use for irrigation. Systems can be as simple as a pipe system draining directly into a mulch field or they can incorporate collection tanks and pumps.

Small Commercial Certification. To encourage more small commercial projects to go green, alternative certification programs have sprung up, including Earthcraft Light Commercial and Earth Advantage Commercial which have found significant appeal.

Lifecycle Analysis (LCA). Lifecycle analysis examines the impact of materials over their lifetime through the lens of environmental indicators including embodied energy, solid waste, air and water pollution, and global warming potential. LCA for building materials will allow architects to determine what products are more sustainable and what combination of products can produce the most environmentally friendly results. For more information and resources, please visit www.earthadvantage.com.