Let's say you want a patio -- but for whatever reason, you don't want it to be permanent. Precisely this topic came up recently on the Landscaping Message Board. In this case, a sewer easement prevents the installation of a permanent structure, a dilemma that suggest a novel idea: why not build a portable patio? Among the possible building materials are interlocking concrete pavers. Geared to the do-it-yourselfer, interlocking concrete pavers are widely available at home improvement centers.