Searching for an energy-efficient home in Allen? View our collection of 47 sustainable residences now on market with prices from $400k to $1.28m (median: $555k). Spread across 5 attractive neighborhoods, these homes offer contemporary energy-saving features. Allen's market report shows 6 similar properties changed ownership last month at a median price of $545k. Prospective buyers should note that energy-efficient properties in Allen tend to move fast at a median price of $545k. Our website refreshes all Allen energy-efficient home listings every 15 minutes to provide the most up-to-date information.