Desert Rain House Gets Living Building Challenge Certification

The Living Building Challenge is one tough building standard, probably the toughest in the world. There have not been a lot of buildings completed that have made it through, and Desert Rain is the first residential project to get certified. It has taken almost a decade since Thomas and Barbara Elliot decided to build an “extreme green dream home” and they have been living in it since 2013, but with the LBC you have to prove performance for a year:

© Desert Rain HouseNow it is done; from the LBC press release:

Place Petal

© Desert Rain House The Living Building Challenge has seven “petals” that must be complied with, including a “place” petal. The new house is replacing two old ones that are described as being “near the end of their useful life.”

As an architectural preservationist my first reaction was that tearing down two houses was not exactly appropriate. But when you look at the standard, under Limits to Growth, the LBC prohibits the use of greenfield sites. So it does make sense.

Water Petal

© Desert Rain House When one looks at the Living Building Challenge, the Water Petal is perhaps the most challenging and the most troubling. It was tough to do;

So they collect the water off all of the metal roofs with gravel filters on the downspouts, and

Bend Water/Screen capture

Meanwhile, the City of Bend Water department promises “a precious, high quality supply of cold, clear water. We are the envy of many other communities because our exceptional water comes from both surface and groundwater sources.”

I do believe that the Living Building Challenge is the world’s toughest, most rigorous and perhaps best building standard, but continue to question the logic of managing drinking water on site like this instead of relying on the larger community resource.

© Timberline

But it is all uphill from here; Desert Rain uses vacuum flush toilets and big Phoenix composting units with an evaporator system to handle all the black water. This is a great solution to the problem of wanting a conventional toilet experience with a conventional china bowl and no looking down at poop, but still being able to have a composting toilet.

They believe it to be “the first (non-institutional) vacuum plumbing system building approval in the U.S.”, but it likely isn’t- Envirolet has been selling a vacuum toilet and composting system since 2005.

Energy Petal

© Desert Rain House The house not only meets the net zero energy requirements, but has enough capacity to charge two electric cars. According to the LBC, “Single–family residences must demonstrate that sufficient back-up battery power is installed for emergency lighting (at least 10% of lighting load) and refrigeration use for up to one week for greater resiliency.” However the Desert Rain page describes a 14.95 kW grid-tied array and makes no mention of batteries and backup.

There is also a solar thermal system providing hot water and space heating, and a solar hot air system to evaporate excess liquid from the composting unit. (Lots more technical detail on the Desert Rain page here)

Health Petal

© Desert Rain House This is where the LBC really shines a light on a subject to a greater level of sophistication than any other certification, from its long red list of materials, to its testing of air quality, natural finishes, elimination of VOCs.

Materials Petal

© Desert Rain House Over 500 materials got Trumpian extreme vetting, to minimize embodied carbon, reduce carbon footprint, shorten travel distances, use responsibly harvested and certified materials. Outside of LEDs made in China and irrigation valves made in Israel, pretty much everything was local.

Equity Petal

© Desert Rain House Finally, there are the equity and beauty petals- both subjective. Equity in particular is tough:

The owners are maintaining an “open door” policy to educate others, and have not fenced the property. It is not a monster home that dominates the area but “The compound concept resulted in multiple smaller buildings clustered around courtyards to keep the scale more humane and to encourage a sense of community.”

Beauty Petal

© Desert Rain House Beauty is, of course, in the eyes of the beholder. But they pull it off.

The Living Building Challenge is really tough to do, but it does things that nobody else is even trying to do with petals like health and happiness, equity and beauty. I have worried about how well it scales, and I continue to question the logic of having electricity net-zero but connected to the grid, while water cannot be connected to the grid that supplies better water that is constantly tested.

But every building that meets the Living Building Challenge is a wonder, a monument to sustainable design, and a testament to the courage and endurance of the people who went through this process. Congratulations to all involved on this one. Read more at Desert Rain page and on the House website.