Explore - Affordability

The budget was nearly as tight as the space in this cheerful renovation of a 516-square-foot flat in Bratislava.

By keeping the budget strict, the insulation tight, and its values clear, Philadelphia’s Postgreen Homes shows a little brotherly love for green, urban housing.

With a very limited budget and no construction experience, Lucky and Kim Diaz overhauled a wreck of a house into a sweet, 1,100-square-foot Los Angeles home with just $55,000 and a whole lot of...