The term “in-law apartments” may send a cold chill down the spine of many married homeowners, but the feature could increase your home valuation. Published on November 12, 2014 in In-law apartments spurring rise in home valuationFull resolution (499 × 334) The term “in-law apartments” may send a cold chill down the spine of many married homeowners, but the feature could increase your home valuation. The term “in-law apartments” may send a cold chill down the spine of many married homeowners, but the feature could increase your home valuation.