Also, back porches could be enclosed, which is what my Aunt and Uncle did in their 1920's 2 bedroomer - 3 kids, to make a 3rd bedroom. They also finished off the attic for the in-laws to live in. One full bath only for 5 people! Half bath in the basement, which was finished in wood paneling. Half bath in the finished attic for the in-laws.
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