Postgreen Homes is "a real estate development firm specializing in modern, green and affordable buildings in Philadelphia’s urban neighborhoods."

According to their site:

projects include single and multi-family residential units as well as mixed-use and commercial buildings for both purchase and lease

Their first project was a loft townhouse built with SIPs.

model: 100k House

developer: Postgreen Homes

designer: Interface Studio Architects LLC

builder: Manor Hill Contracting

size: 1,150 sf

br: 2

bath: 1

available: yes

From the 100k House Project Summary page:

It was conceived as an attempt to prove that green construction can be affordable if properly designed and executed. The project name came from the target construction cost (labor and materials only) for the smaller of the two homes.

Interesting to note: The 2 unit building (includes the 100k House and the 120k House) has a projected sales price of $200,000 - $250,000.

Worth a look:

• flickr collection of photos, renderings and plans
• video tour (3:03)
• 100k House blog