We missed this item last year when we covered West Coast Green 2007: the EPA's Lifecycle Building Challenge. From a West Coast Green email:

... a design competition for students and professionals focusing solely on innovation regarding deconstruction and building material reuse.

And the Lifecycle Building Challenge was born! Submissions from architects, students, planners and builders poured in, ranging from de-nailer guns to radio-tagged, re-useable wall panels to design that considers reuse as it's primary function.

The awards were presented last year at West Coast Green.

The Challenge returns to this year's show. The ability to take apart a building and re-assemble it elsewhere seems like prefab in its purest form.

This last week has seen some impressive progress in the installation of homes for MoMA's Home Delivery exhibition, opening July 20.

In the video above, the System3 home hatches from its shipping containers and is craned onto its temporary foundation in midtown Manhattan. The bones of the BURST*008 model can also be seen in the video, from about 0:10 to 0:25.

Visit the Home Delivery blog for up-to-the-minute blog posts, images and videos.

I've received an update on a few EcoSteel projects. There's been significant progress with the house and observatory (pictured above), designed by Gregory La Vardera, that we first covered them about a year ago.

The large project consists of a 7,000+ sf custom home, a "toy garage" and a private observatory. Definitely not your average home! Because of the project's remote location in Rodeo, New Mexico, not many contractors were available. So, homeowner Steve Cullen chose prefab. Some of the advantages:

• faster build
• ease of delivery and installation
• design flexibility
• strength and quality control
• eco-efficiency

A number of images of the home's progress, as well as some cool night shots of the observatory are available on Picasa.

Another project, Goshawk Ranch, has its own blog. Under construction since September, the home looks to be moving along. The blog's most recent post shows the newly installed wall panels and front door.

EcoSteel's prefab system consists of a home's steel frame, both interior and exterior, along with exterior wall and roof panels. The remainder of the design and materials are left to the homeowner and local contractors. We discussed the system in detail last year.

This skeleton-and-skin sort of offering is not uncommon. A number of other prefab companies sell similar systems, with a range of additional design help. Rocio Romero's LV Series homes come without finishes, but with a list of recommendations on finishes and vendors. And Sander Architects design the entire home, but only prefabricate the steel framing.

Alchemy Architects has had a blog for a while, but just recently, Alchemy's Betsy Gabler has been updating frequently with information on the weeHouse.

One post covered a not-so-weeHouse in PA:

Owners of the Johnson Creek weeHouse have graciously provided some great new pictures of their 4 box weeHouse in Pennsylvania.

The Alchemy Architects website provides a description of the home (seen above) and additional images:

This 2,200SF 3BR retreat home consists of a larger main unit accommodating most daily activities and a smaller sleeping tower. Both units are connected by an elevated patio bridge component.

A post from last week profiled a weeHouse in upstate New York:

• process started with Alchemy in October 2007; site work (client started from scratch which means even putting in their own septic and well systems) and preliminary design happened throughout the winter of 2007-2008
• house is due to be 'set' in Fall 2008
• floor plan follows the weeHouse side x side PAIR that has two bedrooms and one bath; client added screen porch (great idea!) using Alchemy's additional design services and also worked with their general contractor to customize a walk-in basement...
• total square footage (including exterior deck and porch) = 1250
• (06/08): price for weeHouse PAIR in NY is listed at $189K; this house with additional design options/fees is still coming in at under $200K (about $160/SF); additional costs include site work, basement, transportation, and set/hook-up fees (many of these are priced differently by region)

We're still waiting for the Build a wee page to become active. Hopefully we'll see that announced on the blog soon!

Also: there's a weeHouse page, updated frequently, on Facebook. You have to be a friend to see the profile, but you can find it through a search.

With MoMA's Home Delivery exhibition just 6 weeks out, signs of substantive progress are appearing. And it's definitely fun to follow along.

From an article in the New York Sun last week:

Inside a 20,000-square-foot warehouse space in Brooklyn's Gowanus neighborhood, about two dozen people gather most weekday mornings to work on a giant plywood puzzle. There are square-shaped pieces with oval holes in their midsection and jagged ones, resembling enormous saw blades. When they complete the 1,200-piece puzzle, they will have built a house -- or at least the skeleton of one.

Next week, that residence — collapsed into three accordion-like pieces — will be loaded onto a flatbed truck and taken to a vacant lot abutting the Museum of Modern Art. There, the design of the New York architects Jeremy Edmiston and Douglas Gauthier will rise in June, alongside four other modern dwellings

The article speaks of Burst*.008 from Gauthier Architects. We get a little more info from the MoMA Home Delivery blog:

So far the hiccups we’ve had have been solved by the application of elbow grease and collaboration. Our gratitude to all who have given us both.

Other homes are also moving along. Kieran Timberlake's Cellophane House has a frame and quite a bit of glowing acrylic!

The System3 House is in a shipping container (very cool one minute video) somewhere in the middle of the Atlantic.

And, DelMarvaNow.com shared some details on the fabrication of the 'Housing for New Orleans' exhibition home. That home is a version of yourHouse by MIT's Lawrence Sass.

Check out the full Home Delivery blog to see videos, images and tons of updates on each home's construction. Read the full New York Sun article for more detail on the Burst* project and the exhibition.

Last year's CA Boom IV show brought twelve prefab companies to Barker Hanger in Santa Monica, CA. I attended the show, spoke to some vendors and tried to get my head around others. We won't be able to attend this year's CA Boom V, but if you're in the area and seriously interested in prefab, it's well worth a visit:

CA Boom is NOT the place “to talk about the potential of and the maybe/someday value of prefab”, rather this is the Buyer/Seller event for you to “comparison shop” the leading manufacturers who “have delivered houses.”

If you are ready to make a purchase (for instance you have land) and you need to choose who to purchase from, then get on a plane and get to CA Boom. Serious prefab buyers make their purchases at CA Boom.

I counted eight prefab vendors as of today:

• Rocio Romero, LLC
• Alchemy Architects
• H-Haus
• Lindal Cedar Homes, Inc.
• LivingHomes
• Sander Architects
• Modern-Shed
• Lucian Hood (we'll get some more info on this one and report back soon!) Update: We emailed Lucian and posted about his involvement.

As we stated last year, CA Boom's Prefab Zone has strict requirements for the companies present:

1. ability to provide real price quotes
2. ability to receive and accept orders
3. have at least one built dwelling
4. have a manufacturing process in place (not just a plan)
5. have knowledge of how to deliver and install the dwelling

Also worth looking for (date and time TBA):

"THE FOUR WOMEN OF PREFAB" panel discussion featuring prominent prefab architects Michelle Kaufmann, Jennifer Siegal and Rocio Romero, and moderated by Allison Arieff, the former editor-in-chief of DWELL magazine.

Via Inhabitat on Feb. 29:

To date, more than 110 LV prefabs have become home to owners throughout 23 states in the US, with 40 more under construction. While prefab fans have been able to tour the Rocio Romero show home in Missouri for several years, this weekend marks the first time that a finished LV is available for viewing in New York. The first National LV Open House Tour kicks off on March 1st (tomorrow!) in the Hudson Valley!

Sorry that we posted too late for the New York open house, but there will be more! The Rocio Romero site fills in the blanks:

This event is one of four that will be held throughout the country. The 2008 National Tour will provide attendees the opportunity to see and feel the LV space.  Ms. Romero, Rocio Romero staff, homeowners, and general contractors will be present to discuss the LV design features, custom design options, the build process, and construction costs. Since 2003, more than 6,000 individuals have visited the Rocio Romero show home in Perryville, Missouri. Our new national tours will allow attendees to view our newest homes and experience the wide array of customization and lifestyles available to LV home owners.

The open house featured four pre-reserved time slots, costing $40/person. We'll do our best to get the dates for the other three events with plenty of advance notice.

company: Rocio Romero

The New York Times reports:

The social event of the season in Locust Point, a quiet enclave of tidy family homes along the East Bronx waterfront, took place just over a week ago when a crane lifted two 18-ton halves of a prefabricated house off flatbed trailers and stacked them like Legos on an empty lot....

Resolution 4: Architecture of Manhattan...designed the Bronx house...

Joseph Tanney, a partner in the firm, was approached in 2005 by Regina Marengo, president of an engineering consultancy company, about putting a modern prefab on the Bronx waterfront property where she and her husband, William, had lived in a bungalow for two decades.

Read more about the Resolution: 4 Architecture prefab in the full article.

(Hat tip: Prefab Dweller)

Marmol Radziner have a launched a blog:

We hope to post regularly on a range of topics, including the various projects that we currently have in design and production, events around the country, or just interesting articles and ideas that influence what we do.

In the coming months, we’ll be blogging a lot about the Venice House (a.k.a. California House 6). This house is currently in our factory and will be delivered to a small, urban lot this spring. We designed [the] house to respond to the narrow, infill site by having the home look inwards towards small, private courtyard spaces. This allowed us to maintain an open, bright feeling that connects indoor and outdoor spaces despite the small lot.

A recent post discussed putting a concrete floor in a prefab house:

We loved how the concrete floors in the Desert House looked, but we shied away from using them in our first few projects that we produced in our own factory. The Desert House’s concrete were so beautiful, but also so heavy, which made the installation quite challenging...

We'll keep track of any big updates over at the new blog, but be sure to check it out for yourselves.

Greg LaVardera brings us Letters from Sweden - land of modern, land of prefab:

In my previous entry I introduced Scott, my correspondent from Sweden. An American builder relocated to a suburb of Stockholm, he landed in an alternate reality where modern housing was everywhere, commonplace, even dare I say unremarkable. None of the stigmas or resistance we have come to associate with building a modern house were present. Every builder offered solid modern design in the range of homes they sold, and were more than happy to sell you one. On top of this prefabrication techniques were the norm. Sizable portions of the houses Scott saw being built were put together in the factory...

What did Scott find?

"...the majority of new construction is built like this. I would call the house panelized - but it is "way way panelized" and is a total package. The houses come on trucks from rural places in Sweden. The windows are in, the insulation, wiring, wallboard where possible - every thing - the pipes, the wiring systems, the doors, stairs ... everything has been engineered and rationalized to reduce labor, find energy and material economy and work with the method of construction where stuff is pre-assembled as much as possible inside a building and then "erected" or installed on the site under very compressed schedules...."

Read the full post for Greg's comparison to prefab on this side of the pond.

Core 77 reports:

Before pre-fab became so fabulously fab, the Small Homes Council at the University of Illinois in Urbana, Illinois published Homes From Pre-Assembled Wall Panels in 1954.

A bit more about the Small Homes Council, now known as the Building Research Council:

For over 50 years, BRC (formerly known as the Small Homes Council) has conducted housing research and provided public service to residents, homeowners, builders, contractors, engineers, architects, and others in the housing industry. Today BRC continues to draw on the expertise of its own staff and a campus-wide network of experts to improve the state of our built environment.

Current research projects include studies on building performance, moisture control, toxicity issues in residential building materials, windstorm resistance, diversity issues in the architectural profession, and housing environments design and evaluation.

We could not locate the book on AbeBooks.

Still employing similar techniques:
• LV Series
• Modern Shed

I wrote about Oskar Leo Kaufmann and Albert Rüf's System3 last week. It will be included in The Museum of Modern Art's Home Delivery exhibition.

The two designers have been working in the prefab arena since 1996. Past models include:
• System 01 and System 02 based on "elements"
• Su-Si, Fred, Houses A&B based on "units"

The System3 home merges the idea of "units" with that of "elements":

Due to the separation into serving units and "naked elements", the building process is optimized.

1. The serving unit is a completely prefabricated box including all installations. All different trades, such as electrician, plumber, etc. do their work at the service unit factory and do not have to do any on-site work....

2. The solid elements such as wall, floor, and ceiling are made of solid slabs of wood. The producer uses CNC-technology to cut out all openings.

3. ...the window producer prefabricates all windows.

4. ...the skin producer prefabricates the building's skin that includes thermal insulation, waterproofing and vapor barrier.

To me, it seems logical: keep the production of the technical pieces, the "serving units", in the factory where quality control can be tighter; let on-site work be limited to assembly and nothing more. This approach would save both time and money, limiting the trades and expertise needed at the home site; it reminds me of KieranTimberlake's Loblolly House, which we covered last June:

The assembly process begins with off-site fabricated floor and ceiling panels, termed 'smart cartridges.' They distribute radiant heating, hot and cold water, waste water, ventilation, and electricity through the house. Fully integrated bathroom and mechanical room modules are lifted into position. Exterior wall panels containing structure, insulation, windows, interior finishes and the exterior wood rain screen complete the cladding.

Such a mixed-method approach compares to the two major types of prefabrication that we cover on Prefabcosm: SIPs (used by companies like CleverHomes and Jensys Buildings) and complete modules (like those from OMD and weeHouse). Using just SIPs leaves the majority of the skilled work for the site, e.g. installation of utilities. Complete modules are both expensive and difficult to get to the home site. Merging the two methods allows for greater flexibility, less cost, higher quality, and shortened construction time.

With 10+ years working on prefab, Oskar Leo Kaufmann and Albert Rüf are worth watching. While they have yet to translate their experiments into a mass-market product, their work lends much understanding to how the home-construction industry might best take advantage of prefabrication.

Venturo, a fiberglass prefab from the 1970's has been talked about quite a bit around the blogosphere the past couple weeks. Treehugger says:

There is really nothing new about many of the modern prefabs that everyone is going gaga over; back in the 70's Finnish architect Matti Suuronen designed the Venturo, a bit less extreme than his wonderful Futuro House. It appears to have been used primarily as gas stations for BP.

More from Finnish blog Tuovinen:

The "Venturo" is a modular, easily transportable building system, having excellent insulation, low weight and designed for minimum assembly on site.

It is built of high quality materials in order to ensure maximum weathering properties for use in arctic as well as tropical climates and is almost maintenance free.

Being of low weight and factory preassembled, the Venturo means very low erections and foundation costs, where heavy equipment can be avoided.

Nineteen Venturos were built:

First prototype of this model was designed January 9, 1971 and first production unit was built June 1, 1971. According to Museum of Finnish Architecture, BP was built in 1971. BP-Högmo is the second Venturo built according to MFA....

The Venturo was released by Finnish company Oy Polykem Ab following the success of Suuronen's earlier Futuro House. From a paper titled Futuro's Way by Marko Home and Mike Taanila:

Capitalising on the Futuro´s international exposure, Polykem Ltd. soon launched a whole series of plastic buildings designed by Suuronen. The Casa Finlandia series included the CF-100/200 service station (1969), the CF-10 kiosk (1970) and the CF-45 residential/commercial building, better known as the Venturo (1971). All the buildings in the Casa Finlandia series were designed to be durable and convenient to mass-produce, transport and assemble. The numerical suffix in each building´s name indicates its floor area in square metres. Polykem strove to sharpen the international profile of the Casa Finlandia series by publishing stylish 4-colour brochures complete with vivid product descriptions and catchy slogans.

More on the Futuro House from enthusiast Marc Berting:

Matti Suuronen designed this UFO shaped dwelling in 1968, initially for use as a ski-cabin or holiday home....

The Futuro house was completely furnished and could accommodate 8 people. It was constructed entirely out of reinforced plastic, a new, light and inexpensive material back then. The plan was to mass-produce it, so it would be cheap enough to house all people around the earth. Because it was so light-weight, it was easily transportable by helicopter. Mobile living was the new possibility for the future. People could now take their moveable home with them, to wherever they went, and live like modern nomads.

Unfortunately the 1973 oil crisis spoiled all these plans. Prices of plastic raised production costs too high to be profitable. Only 96 Futuro houses were ever built. Besides the 48 made in Finland, also at least 48 were manufactured abroad on license.

The Michelle Kaufmann blog announces:

...we have been working very hard for the past few months to get to this point and are now finally ready and delighted to announce that MKD is going to be a part of the “Smart Home: Green + Wired, Powered by ComEd and Warmed by Peoples Gas” exhibit at MSI that’s opening this spring! The exhibit is going to include a full-size mkSolaire™ home to be built in on parkland on the southeast side of the Museum and will showcase the very best in sustainable living concepts and solutions.

A bit more from the museum exhibit page:

During its 75th Anniversary year, the Museum of Science and Industry will be building a functioning, three-story modular and sustainable “green” home ... to highlight unique home technologies for the 21st century.

The Greater Fort Wayne [Illinois] Business Weekly quotes Art Breitenstein of the home's builder, All American Homes:

The home’s module construction will be under way for two or three more weeks on one of the All American assembly lines in Decatur....

“This is a special house, a very high-priced house; it has the best of the best. ... there’s a lot of new technology in there that’s one-of-a-kind that if it becomes accepted by consumers, like anything else, the price comes down of course.”

Jetson Green says:

I can't wait to see more!

model: mkSolaire from Michelle Kaufmann Designs

I wandered over to the XtremeHomes site the other day and found that they are now writing a blog:

A brief collection of thoughts on the growth of the green building industry. What's real, what's not and what people are expecting.

Definitely worth keeping an eye on.

company: XtremeHomes

Curbed LA watched an OMD home being delivered:

These shots, taken last month, show the delivery of a two-story prefabricated home going up in the Ocean Park neighborhood of Santa Monica. The 2,200 square foot home is comprised of 4 modular units; these shots show the upper two being installed.

Treehugger reports:

We previously showed the Travelpod, an experimental prefab from Travelodge, and thought it was an interesting one-off. We were wrong; the company is looking seriously at prefab hotels and is building their first in the west London district of Uxbridge, right now.

The Good Human's Prefab Wednesday was off this week.

Inhabitat's Prefab Friday made a surprising architectural discovery at the the Consumer Electronics Show. We'll cover that model soon.

architecture.MNP discussed a recently completed Resolution: 4 project.

A number of folks had thoughts on the Home Delivery prefab exhibition at MoMA. The Dream Antilles had a good idea:

If these houses are supposed to be good, somebody should live in them during the show and the people who view the exhibit should be visitors in the houses.

Jaunted provided some new details:

Foundations will be laid in February and the homes will arrive in late May, popping up in next to no time.

The Chicago Tribune predicts:

Given MoMA's taste-making power and its location in the media capital of the world, the show could go a long way toward making prefab housing something more than just a glimmer in visionaries' eyes.

greenbuildingsNYC is excited. The Gothamist commented, as did Curbed. Treehugger mentioned the show. The Chronicle of Higher Education likes the idea that professors' work will be included in the show.

Update: The model appearing in the MoMA show will be the BURST*008.

SYSTEMarchitects' BURST*003 house is the third prefab model featured in the MoMA prefab exhibition.

Artdaily provides some details:

Designed to be assembled on site from laser-cut pieces, the Burst *003 house is a computer-designed remake of the typical prefabricated box. Working from a computer formula that automates the specific pieces needed to create the house desired, the project is based on a system that can be adapted to a changing set of criteria. The 2003 prototype of the Burst *003 project was built on Australia's Northeast coast, and won the Royal Australian Institute of Architects 2006 Wilkinson award.

Architecture Australia explains further:

Laying out the plywood pieces was achieved using the software program used in garment manufacture with very little wastage. While high technology is used throughout the design and manufacturing process, low technology is intentionally employed for assembly and for maintenance. Assembly requires fewer skills but intense cooperation and concentration. The building was put together by architecture students in something akin to a barn raising. The architects are fond of this image, yet recognize that the design’s reliance on numbers of enthusiastic and sympathetic cheap labourers will make it less desirable for some.

This fabrication method reminds me of the yourHouse. The process is explained through images and text on the SYSTEMarchitects site:

Plywood cut by a computer-controlled laser. Delivered to site in sheets with the ribs numbered, scored, and holes cut.

Laser cutting 1 of 400 sheets.

Sorting 1,100 pieces of laser-cut plywood.

Underside of floor structure.

Laser-cutting efficiency -- the total waste from the plywood sheets.

I can't help but be excited for the potential of the BURST* system and look forward to seeing the home at MoMA.

model: BURST* from SYSTEMarchitects

The New York Times reports:

...the Museum of Modern Art has commissioned five architects to erect their own prefab dwellings in a vacant lot on West 53rd Street, adjacent to the museum. Whittled down from a pool of about 400, the five architects are participating in “Home Delivery: Fabricating the Modern Dwelling,” an exhibition opening in July.

The five, to be announced today by the museum, are KieranTimberlake Associates of Philadelphia; Lawrence Sass of Cambridge, Mass.; Douglas Gauthier and Jeremy Edmiston of Manhattan; Oskar Leo Kaufmann and Albert Rüf of Austria; and Richard Horden of Horden Cherry Lee in London.

The MoMa site fills in some blanks:

This exhibition will offer the most thorough examination of both the historical and contemporary significance of factory-produced architectures to date. With increasing concern about issues such as sustainability and the swelling global population, prefabrication has again taken center stage as a prime solution to a host of pressing needs. The prefabricated structure has long served as a central precept in the history of modern architecture, and it continues to spur innovative manufacturing and imaginative design....

The exhibition will examine this phenomenon through historical documents, full-scale reassemblies, and films that trace the roots of prefabrication in the work of architects including Frank Lloyd Wright, Jean Prouvé, and Richard Rogers, corporations such as Lustron, and the imaginative systems of other influential figures, including Thomas Edison and R. Buckminster Fuller.

This contextual component of the exhibition will provide the foundation for a handful of full-scale commissions to be built in MoMA's vacant west lot....The fabrication and delivery of these projects will be documented in a special online exhibition, which will underline prefabrication's importance as a matter of process over product. Furthermore, the delivery and assembly of these projects will function as a real-time urban event that will be visible to the general public from the city streets

A Prefab Project says:

Perhaps notable for the absence of any of the commercially successful prefab architects working in the US, still kind of a big deal...

Haute Nature also commented.

Here's a unique hybrid wall panel, sort of half SIP, half straw bale:

The Enviro Board panels offer a superior building product that is easy to handle and assemble. Today's Enviro Board Panels are solid "concrete like" fiber panels comprised of highly compressed straw fibers. Through the Enviro Board technology, panels are extruded through the mill in a continual process, covered with a durable waterproof paper membrane, cut to desired lengths and end-capped. Panel density and thickness can also be adjusted.

The Enviro Board panel replaces conventional and traditional building materials, such as drywall, thermal insulation, exterior moisture barrier (typically tar paper) and exterior plywood. In addition, because of its 32" width, using Enviro Board panels requires 50% less studs and eliminates unnecessary expenses in the form of materials and labor needed to assemble the materials.

From YouTube:

(Hat tip: Materialicio.us)

While visiting the LV Home Fans Yahoo! group the other day, I happened upon a site I hadn't seen before, Secret Fortress Hideout:

This blog documents the progress of our super-cool, pre-fab home "somewhere" in the wilds of Northwest Arkansas. Rocio Romero designed the home, model LVL, and incorporated our custom modifications.

Recent posts have covered insulation, lighting design, and construction delays:

A few critical path items jumped the track and will push us back about a week.

1. The stainless kitchen cabinets we ordered from Lasertron will be delayed due to an email mixup.

2. The heat won't be connected for two weeks, which delays the floor installation.

3. We found out cultured marble won't work for the tub or bathroom sinks and devised a Plan B (Neptune Zen Soaker Tub and custom-fabricated under-mount stainless trough sinks).

4. And, last, but not least, the company Don scheduled to prime the drywall bumped us a week.

I guess these things happen in building. It's just wild that they all happened in the last two days.

Like A Prefab Project, Secret Fortress Hideout provides a great first-hand look at the construction of a prefab home.

I came across ModularHomeChoice.com while perusing some news the other day:

This website is for those interested in purchasing a modular home or those considering one and wishing to learn more about them.  I will share my experiences and lessons learned while acting as the general contractor on my modular home in the St. Louis, Missouri area.

When researching modular homes, I found a lot of information supplied by builders or sales agents of modular homes.  I am trying to add another perspective to that - that of someone purchasing a modular home as well as being heavily involved in the planning and scheduling of the project.

Sections of the site include:
• background information
• a list of modular builders by state
• financing
• lessons learned
• pictures of all stages of the process

The site is barebones, but informative.

The National Association of Manufacturers has a pretty nifty series of blog posts and accompanying videos of "stuff being made". This week, they focus on Excel Modular Homes of Liverpool Pennsylvania:

Ed Langley, the company's president and CEO, gives us a tour of the operations starting with sales and moving through design and construction....

Lots of construction techniques and philosophies that were new to us. And, it really is a good website with very detailed information -- videos of a modular home being "set," i.e., put in place, here, for example. The home goes up in hours!

Visit the original post for the link to the video. It's long, but shows many details of the modular home manufacturing process.

Sears Roebuck & Co. weren't the only ones selling packaged home kits way back when. In England, corrugated iron prefabs were being sold in the 19th century. 

From the UK Independent:

Cheaply erected, flat-pack corrugated iron homes and farm buildings were once common in the Highlands but most have been torn down. The three-bedroom Ballintomb Cottage is one of the last still standing. In Edwardian times, a local farmer ordered it from the catalogue of a London company and had it delivered by steam train, then horse and cart, to a site near the village of Dulnain Bridge in Strathspey. He assembled it by hand, so he could move his family in during the summer while he rented out his farmhouse to wealthy holidaymakers. It cost just £425. Now, offers of more than £175,000 are being invited but the selling price could reach as much as £250,000.

These days, most of us associate corrugated iron with those cheap, crudely assembled homes packed together in slums across the developing world but, in the 19th century, it was one of the inventions in which Britain took pride. It was exported all over the world to make buildings of every size.

Here's more from the home's real estate listing:

The construction of these iron buildings was fully detailed in the catalogues. They quote that "sheets of standard Birmingham grade galvanised iron are used, truly and evenly corrugated, thickly coated with pure Silesian spelter, true and even in temper, and free from flaws and cracks." Floorboards were supplied of thoroughly seasoned deal in 1" thicknesses and lining boards in 1/2" tongue and grooved. The walls were insulated by a liberal use of felt....

These buildings were sent to every corner of the Empire and Ballintomb Cottage is an excellent example of the quality of these buildings

(Hat tip: Treehugger)

A while back, a commenter on Inhabitat posed what seemed like a radical idea:

"It occurs to me that the factory could be brought to the jobsite with a modification of this method of construction. Perhaps we need to borrow the best method from factory and on-the-job techniques, instead of thinking either-or. For example, why not bring a semi truck that opens out into an on-the-job manufacturing construction unit."

According to the Globe and Mail, a developer in Ontario apparently had the same thought:

Seems like the best of both worlds: factory-built on site!