Homes with open layouts have become some of the most popular and sought-after house plans available today. Open floor plans foster family togetherness as well as increase your options when entertaining guests. Microhouse Open Source Ecology Micro House Heat Ventilation Kit Homes They have been designed for a certain climatic zone and rated 10 out of 10 stars in the Australian ratings system NatHERS which means they require no energy to heat or cool and thus are extremely comfortable to live in. Open source house plans . Please call one of our Home Plan Advisors at 1-800-913-2350 if you find a house blueprint that qualifies for the Low-Price Guarantee. Our huge inventory of house blueprints includes simple house plans luxury home plans duplex floor plans garage plans garages with apartment plans and more. Small house plans Plans 1500 SF and under 1501 - 2000 SF 2001 - 2500 SF 2500 SF and up Duplex plans 1 bedrooom per unit 2 bedrooms per unit 3 bedrooms per unit 4 bedrooms per unit ...