Thanks devinemke, that worked out so much better.
I forgot that I needed to compare an integer value of bedrooms, squareFootage, and price because I have >= & <= values to compare.
Would I do it this way:
$beds =$POST['beds'];
$squareFt=$POST['squareFt'];
$price=$_POST['price'];
$query = "SELECT * FROM planinfo WHERE
homePref = '" . $POST['neighborhood'] . "' AND
homeType = '" . $POST['homeType'] . "' AND
stories = '" . $_POST['stories'] . "' AND
bedrooms >= '" . $beds . "' AND
squareFootage >= '" . $squareFt . "' AND
price <= '" . $price . "'";