diff --git a/internal/services/appservice/service_plan_data_source.go b/internal/services/appservice/service_plan_data_source.go
index 51346febe5d7..f31ffa5cd60e 100644
--- a/internal/services/appservice/service_plan_data_source.go
+++ b/internal/services/appservice/service_plan_data_source.go
@@ -31,6 +31,7 @@ type ServicePlanDataSourceModel struct {
 	Reserved                  bool              `tfschema:"reserved"`
 	WorkerCount               int               `tfschema:"worker_count"`
 	MaximumElasticWorkerCount int               `tfschema:"maximum_elastic_worker_count"`
+	ZoneBalancing             bool              `tfschema:"zone_balancing_enabled"`
 	Tags                      map[string]string `tfschema:"tags"`
 }
 
@@ -98,6 +99,11 @@ func (r ServicePlanDataSource) Attributes() map[string]*pluginsdk.Schema {
 			Computed: true,
 		},
 
+		"zone_balancing_enabled": {
+			Type:     pluginsdk.TypeBool,
+			Computed: true,
+		},
+
 		"tags": tags.SchemaDataSource(),
 	}
 }
@@ -147,13 +153,11 @@ func (r ServicePlanDataSource) Read() sdk.ResourceFunc {
 					servicePlan.AppServiceEnvironmentId = utils.NormalizeNilableString(props.HostingEnvironmentProfile.ID)
 				}
 
-				if v := props.PerSiteScaling; v != nil {
-					servicePlan.PerSiteScaling = *v
-				}
+				servicePlan.PerSiteScaling = utils.NormaliseNilableBool(props.PerSiteScaling)
 
-				if v := props.Reserved; v != nil {
-					servicePlan.Reserved = *v
-				}
+				servicePlan.Reserved = utils.NormaliseNilableBool(props.Reserved)
+
+				servicePlan.ZoneBalancing = utils.NormaliseNilableBool(props.ZoneRedundant)
 
 				servicePlan.MaximumElasticWorkerCount = int(utils.NormaliseNilableInt32(props.MaximumElasticWorkerCount))
 			}
diff --git a/internal/services/appservice/service_plan_resource.go b/internal/services/appservice/service_plan_resource.go
index 75bf4633c9aa..9124b9a4adac 100644
--- a/internal/services/appservice/service_plan_resource.go
+++ b/internal/services/appservice/service_plan_resource.go
@@ -45,6 +45,7 @@ type ServicePlanModel struct {
 	Reserved                  bool              `tfschema:"reserved"`
 	WorkerCount               int               `tfschema:"worker_count"`
 	MaximumElasticWorkerCount int               `tfschema:"maximum_elastic_worker_count"`
+	ZoneBalancing             bool              `tfschema:"zone_balancing_enabled"`
 	Tags                      map[string]string `tfschema:"tags"`
 }
 
@@ -106,6 +107,12 @@ func (r ServicePlanResource) Arguments() map[string]*pluginsdk.Schema {
 			ValidateFunc: validation.IntAtLeast(0),
 		},
 
+		"zone_balancing_enabled": {
+			Type:     pluginsdk.TypeBool,
+			ForceNew: true,
+			Optional: true,
+		},
+
 		"tags": tags.Schema(),
 	}
 }
@@ -159,6 +166,7 @@ func (r ServicePlanResource) Create() sdk.ResourceFunc {
 					PerSiteScaling: utils.Bool(servicePlan.PerSiteScaling),
 					Reserved:       utils.Bool(servicePlan.OSType == OSTypeLinux),
 					HyperV:         utils.Bool(servicePlan.OSType == OSTypeWindowsContainer),
+					ZoneRedundant:  utils.Bool(servicePlan.ZoneBalancing),
 				},
 				Sku: &web.SkuDescription{
 					Name: utils.String(servicePlan.Sku),
@@ -252,13 +260,11 @@ func (r ServicePlanResource) Read() sdk.ResourceFunc {
 					state.AppServiceEnvironmentId = *ase.ID
 				}
 
-				if v := props.PerSiteScaling; v != nil {
-					state.PerSiteScaling = *v
-				}
+				state.PerSiteScaling = utils.NormaliseNilableBool(props.PerSiteScaling)
 
-				if v := props.Reserved; v != nil {
-					state.Reserved = *v
-				}
+				state.Reserved = utils.NormaliseNilableBool(props.Reserved)
+
+				state.ZoneBalancing = utils.NormaliseNilableBool(props.ZoneRedundant)
 
 				state.MaximumElasticWorkerCount = int(utils.NormaliseNilableInt32(props.MaximumElasticWorkerCount))
 			}
@@ -318,9 +324,11 @@ func (r ServicePlanResource) Update() sdk.ResourceFunc {
 			if metadata.ResourceData.HasChange("per_site_scaling_enabled") {
 				existing.AppServicePlanProperties.PerSiteScaling = utils.Bool(state.PerSiteScaling)
 			}
+
 			if metadata.ResourceData.HasChange("sku_name") {
 				existing.Sku.Name = utils.String(state.Sku)
 			}
+
 			if metadata.ResourceData.HasChange("tags") {
 				existing.Tags = tags.FromTypedObject(state.Tags)
 			}
diff --git a/internal/services/appservice/service_plan_resource_test.go b/internal/services/appservice/service_plan_resource_test.go
index 2593699339ef..76b5bff434b0 100644
--- a/internal/services/appservice/service_plan_resource_test.go
+++ b/internal/services/appservice/service_plan_resource_test.go
@@ -240,10 +240,12 @@ resource "azurerm_service_plan" "test" {
   name                     = "acctest-SP-%[1]d"
   resource_group_name      = azurerm_resource_group.test.name
   location                 = azurerm_resource_group.test.location
-  sku_name                 = "S1"
+  sku_name                 = "P1v3"
   os_type                  = "Linux"
   per_site_scaling_enabled = true
-  worker_count             = 2
+  worker_count             = 3
+
+  zone_balancing_enabled = true
 
   tags = {
     environment = "AccTest"
@@ -273,6 +275,8 @@ resource "azurerm_service_plan" "test" {
   per_site_scaling_enabled = true
   worker_count             = 3
 
+  zone_balancing_enabled = true
+
   tags = {
     Foo = "bar"
   }
diff --git a/website/docs/d/service_plan.html.markdown b/website/docs/d/service_plan.html.markdown
index 7ecbbf104009..b430fecfb32b 100644
--- a/website/docs/d/service_plan.html.markdown
+++ b/website/docs/d/service_plan.html.markdown
@@ -55,6 +55,8 @@ In addition to the Arguments listed above - the following Attributes are exporte
 
 * `sku_name` - The SKU for the Service Plan.
 
+* `zone_balancing_enabled` - Is the Service Plan balance across Availability Zones in the region?
+
 * `tags` - A mapping of tags assigned to the Service Plan.
 
 ## Timeouts
diff --git a/website/docs/r/service_plan.html.markdown b/website/docs/r/service_plan.html.markdown
index b82371072afe..f0377d5b310e 100644
--- a/website/docs/r/service_plan.html.markdown
+++ b/website/docs/r/service_plan.html.markdown
@@ -60,6 +60,10 @@ The following arguments are supported:
 * `worker_count` - (Optional) The number of Workers (instances) to be allocated. 
 
 * `per_site_scaling_enabled` - (Optional) Should Per Site Scaling be enabled. Defaults to `false`.
+ 
+* `zone_balancing_enabled` - (Optional) Should the Service Plan balance across Availability Zones in the region. Defaults to `false`.
+
+~> **NOTE:** If this setting is set to `true` and the `worker_count` value is specified, it should be set to a multiple of the number of availability zones in the region. Please see the Azure documentation for the number of Availability Zones in your region. 
 
 * `tags` - (Optional) A mapping of tags which should be assigned to the AppService.