Sears is a retail store, however the franchise's main focus is fine furniture and clothing. It might come as a shock to you, but you used to be able to buy an entire house from Sears - you just had to transport it and build it yourself. The DIY kit came equipped with plumbing, a porch, shingles, everything you needed to make a modern (at the time) house. These kits were typically sold from the early 1900's to the 1940's.
There are ways to actually tell if your house is a Sears house! You can check your plumbing pipes to see if there is an 'S' or an 'SR' stamped on every different pipe that goes through your house! But, there is a whole LIST of things your house needs to have to be an official Sears Do It Yourself house! Click the source to find out what they are!