Mid Century Split Level Remodel . Leitritz divided the house lengthwise, creating four long, narrow spaces. A common addition is adding a level above the one story portion, usually for a master suite and other related spaces. Home Art Split level home designs, Mid century modern house, Mid from www.pinterest.com Just like every major project in this split level remodel, the basement got almost finished. Another exterior change that also gives an impact on the interior of the house is the new vaulted roof. Addition on the back can create a larger kitchen or family room space.