Как вариант:
$propertyCollection = $order->getPropertyCollection();
foreach ($propertyCollection as $propertyItem){
if($propertyItem->getField("CODE") == "ADDRESS"){
$address = $propertyItem->getValue();
}
}
$propertyCollection = $order->getPropertyCollection();
foreach ($propertyCollection as $propertyItem){
if($propertyItem->getField("CODE") == "ADDRESS"){
$address = $propertyItem->getValue();
}
}