diff --git a/application/ConstructionConsent/ConstructionConsent.php b/application/ConstructionConsent/ConstructionConsent.php
index b20d3ebdf..da1c952a2 100644
--- a/application/ConstructionConsent/ConstructionConsent.php
+++ b/application/ConstructionConsent/ConstructionConsent.php
@@ -624,27 +624,27 @@ FROM ConstructionConsent
         if(array_key_exists("conduit_installed_building", $filter)) {
             $conduit_installed_building = $filter["conduit_installed_building"];
             if($conduit_installed_building == "!NULL") {
-                $where .= " AND conduit_installed_building IS NOT NULL";
+                $where .= " AND (conduit_installed_building IS NOT NULL AND conduit_installed_building != 0)";
             } elseif($conduit_installed_building == "NULL") {
-                $where .= " AND conduit_installed_building IS NULL";
+                $where .= " AND (conduit_installed_building IS NULL OR conduit_installed_building = 0)";
             }
         }
 
         if(array_key_exists("conduit_installed_ftu", $filter)) {
             $conduit_installed_ftu = $filter["conduit_installed_ftu"];
             if($conduit_installed_ftu == "!NULL") {
-                $where .= " AND conduit_installed_ftu IS NOT NULL";
+                $where .= " AND (conduit_installed_ftu IS NOT NULL AND conduit_installed_ftu != 0)";
             } elseif($conduit_installed_ftu == "NULL") {
-                $where .= " AND conduit_installed_ftu IS NULL";
+                $where .= " AND (conduit_installed_ftu IS NULL OR conduit_installed_ftu = 0)";
             }
         }
 
         if(array_key_exists("inhouse_cabling", $filter)) {
             $inhouse_cabling = $filter["inhouse_cabling"];
             if($inhouse_cabling == "!NULL") {
-                $where .= " AND inhouse_cabling IS NOT NULL";
+                $where .= " AND (inhouse_cabling IS NOT NULL AND inhouse_cabling != 0)";
             } elseif($inhouse_cabling == "NULL") {
-                $where .= " AND inhouse_cabling IS NULL";
+                $where .= " AND (inhouse_cabling IS NULL OR inhouse_cabling = 0)";
             }
         }