diff --git a/examples/data/planningPermission/major.ts b/examples/data/planningPermission/major.ts
index f3019c32..77131639 100644
--- a/examples/data/planningPermission/major.ts
+++ b/examples/data/planningPermission/major.ts
@@ -433,6 +433,7 @@ export const planningPermissionMajor: Schema = {
         surfaceWaterDisposal: 'drainageSystem',
       },
       units: {
+        total: 25,
         residential: [
           {
             type: {value: 'house', description: 'House'},
@@ -442,7 +443,7 @@ export const planningPermissionMajor: Schema = {
           },
           {
             type: {value: 'house', description: 'House'},
-            tenure: 'MH',
+            tenure: {value: 'MH', description: 'Market housing'},
             bedrooms: 4,
             identicalUnits: 5,
           },
@@ -457,7 +458,10 @@ export const planningPermissionMajor: Schema = {
           },
           {
             type: {value: 'house', description: 'House'},
-            tenure: 'SAIR',
+            tenure: {
+              value: 'SAIR',
+              description: 'Social, affordable or interim rent',
+            },
             bedrooms: 2,
             identicalUnits: 2,
           },
diff --git a/examples/data/planningPermission/minor.ts b/examples/data/planningPermission/minor.ts
index 4f73a964..bfa7a990 100644
--- a/examples/data/planningPermission/minor.ts
+++ b/examples/data/planningPermission/minor.ts
@@ -269,6 +269,7 @@ export const planningPermissionMinor: Schema = {
         boundary: 'white painted timber',
       },
       units: {
+        total: 1,
         residential: [
           {
             type: {value: 'house', description: 'House'},
diff --git a/examples/planningPermission/major.json b/examples/planningPermission/major.json
index 6217595f..51677903 100644
--- a/examples/planningPermission/major.json
+++ b/examples/planningPermission/major.json
@@ -703,6 +703,7 @@
         "surfaceWaterDisposal": "drainageSystem"
       },
       "units": {
+        "total": 25,
         "residential": [
           {
             "type": {
@@ -721,7 +722,10 @@
               "value": "house",
               "description": "House"
             },
-            "tenure": "MH",
+            "tenure": {
+              "value": "MH",
+              "description": "Market housing"
+            },
             "bedrooms": 4,
             "identicalUnits": 5
           },
@@ -742,7 +746,10 @@
               "value": "house",
               "description": "House"
             },
-            "tenure": "SAIR",
+            "tenure": {
+              "value": "SAIR",
+              "description": "Social, affordable or interim rent"
+            },
             "bedrooms": 2,
             "identicalUnits": 2
           }
diff --git a/examples/planningPermission/minor.json b/examples/planningPermission/minor.json
index 9352fb1e..f2f6cb0f 100644
--- a/examples/planningPermission/minor.json
+++ b/examples/planningPermission/minor.json
@@ -286,6 +286,7 @@
         "boundary": "white painted timber"
       },
       "units": {
+        "total": 1,
         "residential": [
           {
             "type": {
diff --git a/schema/schema.json b/schema/schema.json
index 54f57ee7..e2492d1d 100644
--- a/schema/schema.json
+++ b/schema/schema.json
@@ -23755,9 +23755,13 @@
             "type": "object"
           },
           "type": "array"
+        },
+        "total": {
+          "type": "number"
         }
       },
       "required": [
+        "total",
         "residential"
       ],
       "type": "object"
diff --git a/types/schema/data/shared.ts b/types/schema/data/shared.ts
index c9e019a8..75aa44aa 100644
--- a/types/schema/data/shared.ts
+++ b/types/schema/data/shared.ts
@@ -35,6 +35,7 @@ type OSRoadsSource = {
 };
 
 export type ResidentialUnits = {
+  total: number;
   residential: {
     type: UKResidentialUnitType;
     tenure: UKTenureType;