new construction

Modular, Prefab, and Compact Options for Green Homes and Structures

Below is a listing of companies that offer green dwellings in the form of modular, prefab/manufactured, compact and/or mobile structures. These days, there are many such options available that are not only green, but also beautiful, well-made, and often low-cost. Some of these structures are homes or cabins/cottages, while others can be used as an addition, a backyard studio, office, in-law unit/guest house, or some other type of “accessory dwelling unit.”

They come in a wide range of sizes, from teeny-tiny one-room spaces (e.g., 100 sq. ft.) and small units (see the Tiny/Compact Structures section below) to conventionally sized homes. They are also available in a wide variety of styles; some have traditional designs, while others have a very modern look. Some are available as plans and/or DIY kits, and others have designated builders. Many can be modified or customized.

Prefab (factory-built) homes have many benefits. They can be built more efficiently (e.g., less material waste), more quickly, with more precision and durability (i.e., higher quality), and they typically have more predictable costs (and often cost less) than site-built homes.

The levels of greenness vary among the following options, but all of them tout some green features.

This is not a comprehensive listing; there are many other companies that make similar types of green structures. I’ve provided links below to other directories that list additional options. If you know of another green modular, prefab, mobile, or small home designer or manufacturer that you would recommend, please share it in the Comments.

Note: The asterisk (*) shown after certain listings indicates that those companies seem to offer at least one low-cost/affordable option. Some of the other companies might also offer such options, but specific pricing isn’t available on all of the websites; in some cases, one must contact the company for pricing information.

Blu Homes (offices in CA, MA, and MI)

BlueSky MOD (based in Toronto, Canada)

Clayton i-house

Clever Homes (based in CA)

Eco-Infill (based in CO)

EcoMod Structures (based in WV) *

FabCab

IdeaBox (based in OR)

Jot House *

Lindal Cedar Homes (see Mod.Fab and Lindal Architects Collaborative; Lindal has an international network of dealers) *

Living Homes (based in CA)
C6 = their low-cost option*

Marmol Radziner Prefab (based in CA)

Method Homes (based in WA)

New Old Green Modular Home (from New World Home)

OHOME (Healthy Buildings Technology Group; based in CA)

OMD (Office of Mobile Design; based in CA)

Piece Homes (Davis Studio Architecture + Design; based in CA)

Rocio Romero LV series (based in MO) *

Stillwater Dwellings (based in WA) *

Studio 101 Designs (based in CA)

2morrow Studio (based in VT) *

weeHouses (Alchemy Architects, based in MN) *

Xtreme Green Homes (based in NC, SC, and VA)

ZETA Communities (modular multi-family developments; based in CA)

For a listing of MANY other types of modular/manufactured homes (some of which have green features), see this compendium.

Books on green prefab homes:

Prefabulous + Almost Off the Grid: Your Path to Building an Energy-Independent Home, by Sheri Koones

Prefabulous + Sustainable: Building and Customizing an Affordable, Energy-Efficient Home, by Sheri Koones

Prefab Green, by Michelle Kaufmann

Prefab, by Allison Arieff

Tiny / Compact Structures  *
(some of which are mobile)

Many of the companies listed above offer one or two options for small dwellings, while the following companies specialize in small structures:

Ecopods (based in Ontario, Canada)

GreenPods (based in WA)

kitHAUS (based in CA)

L41 Home (based in BC, Canada)

Leaf House (based in the Yukon, Canada)

Little Green Buildings (made w/ SIPs; based in WA)

Little House on the Trailer (based in CA)

Modern-Shed (based in WA, with dealers in all states)

OMD (Office of Mobile Design; based in CA)

Tumbleweed Tiny House Co. (house plans and some pre-built homes; some are mobile)

Wee Cabins (based in MN)

weeHouses (Alchemy Architects, based in MN)

YardPods (based in CA)

m-ch (Micro Compact Home; based in Germany)

For a listing of many other types of small homes (some of which have other green features), see this Tiny House Directory.

Resources on small homes:

Tiny House Blog

Small House Society

The Small House Book, by Jay Shafer

Little House on a Small Planet: Simple Homes, Cozy Retreats, and Energy Efficient Possibilities, by Shay Salomon

And here’s a listing of other books on compact design.

 

* Low-cost/affordable option(s) available

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July 30, 2012
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LEED Platinum Leaders: 2012 Update of Top-Ranking States and Countries

Platinum is the highest rating in the LEED (Leadership in Energy and Environmental Design) green building certification program. Building projects that have attained this rating are among the greenest in the world.*

I recently added newly certified Platinum-rated projects (buildings, homes, offices, and stores) to my online listing of LEED Platinum Certified Building Projects Worldwide, which I had last updated a year ago. The listing is organized by country and—within the U.S.—by state. Some of the listed projects are linked to online case studies. The listing includes projects of all types, from every LEED rating system: New Construction (and Major Renovations), Existing Buildings/Operations & Maintenance, Neighborhood Developments, Commercial Interiors, Core & Shell, Homes, Schools, and Retail.

As of my latest review of the data (at the beginning of January 2012), it appears that there are now more than 1,045 LEED Platinum rated projects worldwide.

While the vast majority of these LEED projects—about 950 of them—are located in the United States (where LEED was created), Platinum rated projects now exist in 25 countries; a year ago only 16 countries had LEED Platinum rated projects. The nine countries that gained their first LEED Platinum projects over the past year are: France, Hong Kong, Italy, Japan, Mexico, the Netherlands, Switzerland, Taiwan, and Turkey. The other countries with LEED Platinum projects are: Australia, Brazil, Canada, China, Finland, Germany, Great Britain, India, Saudi Arabia, South Korea, Spain, Sri Lanka, Sweden, Thailand, the United Arab Emirates, and of course the United States. After the U.S., India is the country with the most Platinum projects, with about 35 projects so far (up from 20 a year ago). Canada and China also have many Platinum projects.

Within the United States, 49 of the 50 U.S. states (all states except North Dakota)—plus Washington D.C. and Puerto Rico—now have building projects that have achieved the LEED Platinum rating. A year ago, Alabama and West Virginia did not yet have any LEED Platinum projects, but now they do.

In terms of the absolute number of LEED Platinum certified projects in each state, here are the top 5 states with the greatest number of LEED Platinum projects (at last count):

So California has more than 2.5 times more Platinum projects than any other state—but that’s not too surprising since it’s the most populous state in the country.  On a per capita basis (i.e., as a percentage of population size), Washington D.C. has more LEED Platinum rated projects than any of the states. And when you add in the 50 states, here are the Top 5 with the greatest number of LEED Platinum projects per capita:

  1. Washington, D.C.
  2. Oregon
  3. Montana
  4. Vermont
  5. New Mexico

The range of Platinum project types is very broad. In addition to high-profile projects (such as the iconic TransAmerica Pyramid in San Francisco, which got the Platinum rating for its upgrades under the LEED for Existing Buildings: Operations & Maintenance rating system) and a number of high-end offices, retail spaces, and luxury residences, LEED Platinum projects also include several public buildings and many modest homes and affordable housing developments. For example, there are dozens of Habitat for Humanity-built LEED Platinum homes around the country, and more than 75 affordable Platinum homes built in New Orleans alone through various initiatives, including Make It Right.

* Another green building certification, which is widely considered to be an even higher bar to reach than LEED Platinum, is the Living Building Challenge. To date, four projects have achieved the Living Building Challenge certification: the Tyson Living Learning Center in Eureka, Missouri; the Omega Center for Sustainable Living in Rhinebeck, New York (which also got a LEED Platinum certification); and the Eco-Sense home in Victoria, British Columbia. The latest project to achieve this certification (along with a LEED Platinum certification) is the Hawaii Preparatory Academy Energy Lab in Kamuela, Hawaii.

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January 19, 2012
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Net-Zero-Energy and “Passive” Homes: New Resources

If you’re thinking about doing a major renovation of your home or building a new home, I hope you’ll avail yourself of the growing number of resources on how to design and build houses that consume very little energy and that produce at least as much energy as they consume (i.e., net-zero-energy homes).

One of the most recent books on this topic is: Energy Free Homes for a Small Planet: A comprehensive guide to the design, construction, and economics of net-zero energy homes, by Ann V. Edminster (Green Building Press, December 2009). The publisher says: “Energy Free is designed to equip building professionals and homeowners alike with a toolkit for creating homes that use no more energy than they produce—this means homes that are free from the vagaries of energy-price fluctuations and that help to free society of the high political and environmental costs of fossil fuels. The author includes…step-by-step guidance on how to make decisions that will yield an energy-free residential project, whether a single-family home or multifamily building, new or existing, in an urban or a rural setting.” For more info about the book, click here.

One approach to designing and renovating homes so that they use very little energy is the Passive House approach, espoused by the Passive House Institute. The Passive House (or Passiv Haus) standard was originally developed in Germany. Passive houses are designed to reduce energy consumption by 80-90% compared to conventional houses. The first new home being built as a Passive House in California is a project of the Community Land Trust Association of West Marin (CLAM). The home, known as the Blue2 House, is an affordable second unit behind another home in Point Reyes Station; the main house was also renovated using some Passive House techniques.  CLAM is chronicling the home’s construction process and progress on a blog.

Other resources worth checking out include: GreenBuildingAdvisor.com, which has published several case studies of net-zero and near-net-zero energy homes; the Home of the Future program from the Sacramento Municipal Utility District (SMUD); the Department of Energy’s Building America program; and Affordable Comfort Inc.’s Thousand Home Challenge and Deep Energy Reductions programs.

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June 3, 2010
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Salmon Creek Falls Environmental Center: First LEED Platinum Building in Sonoma County

SCEC photo by Matt CarpenterThe recently certified Salmon Creek Falls Environmental Center is the first LEED Platinum certified K-12 public school in California, and it is also the first building in Sonoma County to achieve LEED Platinum certification. (The first commercial/non-residential building, that is. I believe that a private residence in Healdsburg was actually the first project to achieve LEED Platinum in Sonoma County.) To the best of my knowledge, the Salmon Creek Falls Environmental Center is the first Platinum rated non-residential building in the entire North Bay region of the Bay Area (Sonoma, Napa, and Marin counties). The Center is located on the site of the Harmony Union Schools (Harmony Elementary and Salmon Creek Middle School) in Occidental, CA, a town in the redwoods to the west of Santa Rosa. The building serves the school district as well as the surrounding community. It includes an auditorium, cafeteria and kitchen, and meeting rooms; and it has many green features, including a vegetated, flower-covered “living roof.”

Here is my listing of all North Bay building projects that have achieved LEED certification to date. And here’s a longer listing of green building projects (of all sorts, not only LEED projects) that I’m aware of in the North Bay.

And a quick update on the stats for LEED Platinum projects worldwide: According to my latest calculations (as of December 2009), 46 states and 12 countries (including the U.S.) now have at least one LEED Platinum certified building. China and Great Britain are the latest countries to join the ranks of those with a LEED Platinum rated project. Within the United States, California—with more than 50 Platinum certified projects so far—is home to more Platinum projects than any other state.

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December 17, 2009
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Green Tax Credits, Rebates, and Other Financial Incentives

GreenDollarSignThe following are key online resources for information on federal, state, and local environmental tax credits, rebates, and other financial incentives. Most of the incentives that are available are for installing energy-efficient equipment or renewable energy (e.g., solar) technologies.

FEDERAL

These are good directories of federal income tax credits, grants, other incentives for energy-efficient products—for consumers, as well as businesses, builders, and manufacturers:

Click here for a clear summary of the main tax credits currently available: essentially 30% of various energy-efficiency improvements (up to $1,500) and 30% of the cost of solar energy installations. For info on federal grants (to organizations and agencies), go to Grants.gov.

STATE AND LOCAL

Check out the Database of State Incentives for Renewables and Efficiency for a compendium of options, organized by state. Also check with your municipality (city and county governments) and local utility companies. Many offer their own green rebates and incentives. And this is a great summary of energy-efficiency grants and funds provided to state and local agencies by the 2009 economic stimulus/recovery bill (ARRA).

CALIFORNIA

For those of you who are in California, there are numerous entities offering green rebates and other incentives. Take a look at these resources:

If you know of other useful directories or resources related to green financial incentives, or if you have made use of energy tax credits or other green incentives, please share your experiences or suggestions by leaving a comment below.

NEW (added 1/19/10): Also check out the directory of energy rebates and tax credits at EnergySavvy.com. Enter your zip code and the site will give you a list of applicable state, local, and federal incentives.

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November 16, 2009
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LEED Platinum Certified Projects Worldwide: An Updated Listing

I recently added the latest set of Platinum rated projects to my listing of LEED Platinum certified building projects worldwide. The listing is organized by countries and states, and some of the projects are linked to in-depth case studies. As of this month (October 2009), I know of LEED Platinum certified projects in 44 U.S. states plus Puerto Rico, as well as projects in 9 other countries: Australia, Brazil, Canada, Germany, India, Saudi Arabia, South Korea, Sri Lanka, and the United Arab Emirates. There are all types of Platinum projects: commercial, residential, institutional…new construction as well as renovation.

LEED_platinumPlatinum is the highest rating in the LEED green building rating systems. Building projects that have attained this rigorous level of certification are among the greenest in the world.

I update the listing every month or two. If you know of a project that has officially achieved LEED Platinum certification but is not yet included in the listing, please let me know.

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October 21, 2009
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Upcoming Green Events in the San Francisco Bay Area

If you’ll be in the San Francisco Bay Area during the first week of October, consider attending one or both of these entertaining and edifying events, which will be taking place in San Francisco and in West Marin County respectively:

West Coast Green, San Francisco3022922986_774505c734_m
Expo + conference on green innovation for the built environment
Fort Mason Center
October 1-3, 2009 (Thursday – Saturday)
www.westcoastgreen.com

3rd Annual Point Reyes Green Homes Tour, Pt. Reyes Station
Organized by the Community Land Trust Association of West Marin (CLAM)
October 4, 2009 (Sunday)
www.clam-ptreyes.org

If you’d like to recommend other green events that will be happening in the Bay Area this fall, feel free to mention them in the Comments section.

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September 7, 2009
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Case Studies and Profiles of Green Homes and Buildings

The following websites have some of the most well-presented and up-to-date, free online collections of case studies (or profile articles with in-depth project information) on green homes and green buildings around the country. They feature new construction as well as renovation projects.

These three sources provide case studies and information on residential projects only (primarily single-family homes):

[Feb. 2011 Update: See a more recent post that provides additional residential links.]

The following sites primarily feature commercial and institutional buildings, though they also include some case studies of residential projects:

  • High Performance Buildings Database provided by the U.S. Department of Energy and BuildingGreen. The case studies in this database are very comprehensive; they include information on costs, the team process, and lessons learned, as well as details on the projects’ green strategies and materials. Currently, the database contains case studies on more than 275 buildings, including more than 130 LEED certified projects. Note: In order to get full access to the case studies through the BuildingGreen site, you have to be a member/subscriber (which I believe is well worth the price if you’re actively involved or have a strong interest in green building). If you’re not a subscriber, you can get free access to complete versions of a subset of those case studies (112 of the 275) via the Department of Energy’s database (unfortunately, this site hasn’t been updated for a few years, so it doesn’t include the most recent projects that are posted on BuildingGreen). In addition, you can see complete versions of some of the LEED case studies via the U.S. Green Building Council’s site (select “Projects with Case Studies” on the search form), and case studies on the annual award winners of the AIA COTE (American Institute of Architects’ Committee on the Environment) Top Ten Green Projects via the AIA’s website.

I have written many case studies on green building projects over the years. In addition to the two recent Green Building Advisor case studies mentioned above, I’ve prepared in-depth case studies on the David Brower Center, Berkeley; Alder Creek Middle School, Truckee; Colorado Court affordable housing, Santa Monica; the Linden Street Apartments, Somerville, MA, and other projects. Links to some of my published case studies are posted on MLandman.com.

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August 20, 2009
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LEED Platinum Splendor:
California Academy of Sciences museum opens

The new California Academy of Sciences museum in San Francisco’s Golden Gate Park recently opened its doors to the public. The building achieved the Platinum (top-tier) rating in the LEED (Leadership in Energy and Environmental Design) green building rating system. Designed by Renzo Piano, Stantec Architecture, and Arup, the 410,000-square-foot building is the largest public Platinum-rated project in the world (to date). Featuring a four-story rainforest exhibit, an aquarium, a planetarium, and an enormous (and hilly) “living roof” (AKA a vegetated or green roof) that visitors can access, the museum is proving to be wildly popular. If you go there soon, be prepared for crowds.

For details about the building’s sustainable design features, go to:
www.calacademy.org/academy/building/sustainable_design

If you’d like to know where other LEED Platinum buildings are throughout the country or the world, click here: LEED Platinum Certified Buildings Worldwide. I also developed an interactive Google map of green buildings in San Francisco, and I keep updated lists of green building projects in the San Francisco Bay Area and all LEED certified projects in Northern California.

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February 7, 2009
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