A Location Efficient Mortgage (LEM) is a special kind of mortgage loan made to help people buy a home in areas where public transportation is easily accessible. This type of loan allows people to borrow more money, so they can purchase a more expensive house while still only making one affordable monthly payment. With a Location Efficient Mortgage, you can save money on things like gas, car insurance, and parking because you can use public transportation to get around. That means you have extra money each month to use for other things.