diff --git a/CHANGELOG.md b/CHANGELOG.md
index 562ac10119..4a7f5c7e64 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ BUG FIXES:
 * Add timeouts to Graph requests in API ([#4723](https://github.com/microsoft/AzureTRE/issues/4723))
 * Fix missing metastoreDomains for Databricks, which caused metastore outages for some domains ([#4779](https://github.com/microsoft/AzureTRE/issues/4779))
 * Fix cost display duplication when user resource is deleted - UI incorrectly reused cost data for remaining resources ([#4783](https://github.com/microsoft/AzureTRE/issues/4783))
+* Fix type mismatch error where `{{ resource.parent.my_boolean_property }}` was returning string instead of the correct type ([#4813](https://github.com/microsoft/AzureTRE/issues/4813))
 * Delete npm package lock file ([#4810](https://github.com/microsoft/AzureTRE/issues/4810))
 
 COMPONENTS:
diff --git a/api_app/_version.py b/api_app/_version.py
index 545cb33740..e6e3369ba2 100644
--- a/api_app/_version.py
+++ b/api_app/_version.py
@@ -1 +1 @@
-__version__ = "0.25.12"
+__version__ = "0.25.13"
diff --git a/api_app/service_bus/substitutions.py b/api_app/service_bus/substitutions.py
index edafbb536e..a0d6668b4e 100644
--- a/api_app/service_bus/substitutions.py
+++ b/api_app/service_bus/substitutions.py
@@ -151,6 +151,8 @@ def substitute_value(val: str, primary_resource_dict: dict, primary_parent_ws_di
         if isinstance(prop_to_get, dict) or isinstance(prop_to_get, list):
             return prop_to_get
         else:
+            if val == "{{" + t + "}}":
+                return prop_to_get
             val = val.replace("{{" + t + "}}", str(prop_to_get))
 
     return val
diff --git a/api_app/tests_ma/test_service_bus/test_substitutions.py b/api_app/tests_ma/test_service_bus/test_substitutions.py
index f8f81ca318..f31eb21587 100644
--- a/api_app/tests_ma/test_service_bus/test_substitutions.py
+++ b/api_app/tests_ma/test_service_bus/test_substitutions.py
@@ -416,3 +416,28 @@ def test_substitution_array_replace_not_found(
     obj = substitute_properties(step, primary_resource, None, None, resource_to_update)
     assert len(obj["rule_collections"]) == 1
     assert obj["rule_collections"][0]["name"] == "Object 1"
+
+
+def test_substitution_boolean_preservation(primary_resource):
+    resource_dict = primary_resource.dict()
+    # Mock a boolean property in the resource dict
+    resource_dict["properties"]["isEnabled"] = True
+    resource_dict["properties"]["count"] = 42
+
+    # Test boolean preservation
+    val_to_sub = "{{ resource.properties.isEnabled }}"
+    val = substitute_value(val_to_sub, resource_dict, None, None)
+    assert val is True
+    assert isinstance(val, bool)
+
+    # Test int preservation
+    val_to_sub = "{{ resource.properties.count }}"
+    val = substitute_value(val_to_sub, resource_dict, None, None)
+    assert val == 42
+    assert isinstance(val, int)
+
+    # Test string concatenation (should fallback to string)
+    val_to_sub = "Count is {{ resource.properties.count }}"
+    val = substitute_value(val_to_sub, resource_dict, None, None)
+    assert val == "Count is 42"
+    assert isinstance(val, str)
diff --git a/docs/tre-templates/pipeline-templates/pipeline-schema.md b/docs/tre-templates/pipeline-templates/pipeline-schema.md
index 7d0d291581..411e5f4302 100644
--- a/docs/tre-templates/pipeline-templates/pipeline-schema.md
+++ b/docs/tre-templates/pipeline-templates/pipeline-schema.md
@@ -31,6 +31,17 @@ It's possible to refer to properties from the primary resource (the resource tha
 
 The syntax is `{{ resource.propertyName }}`. For example: `"{{ resource.properties.display_name }}"`.
 
+### Accessing Parent Resource Properties
+It's also possible to access properties from the parent resources. This is useful when a resource needs information from its container (e.g. a user resource needing the workspace service's address space).
+
+| Resource Type | Available References | Description |
+| --- | --- | --- |
+| User Resource | `{{ resource.parent.properties... }}` | Properties of the **Workspace Service** |
+| User Resource | `{{ resource.parent.parent.properties... }}` | Properties of the **Workspace** |
+| Workspace Service | `{{ resource.parent.properties... }}` | Properties of the **Workspace** |
+| Workspace | N/A | Workspaces do not have parents in this context |
+| Shared Service | N/A | Shared Services do not have parents in this context |
+
 Example pipeline in `template_schema.json`:
 The below example references 2 properties from the primary resource to be used in updating the firewall shared service.
 
diff --git a/docs/tre-workspace-authors/authoring-workspace-templates.md b/docs/tre-workspace-authors/authoring-workspace-templates.md
index 23614bb29f..163a2358bf 100644
--- a/docs/tre-workspace-authors/authoring-workspace-templates.md
+++ b/docs/tre-workspace-authors/authoring-workspace-templates.md
@@ -76,6 +76,10 @@ All the values for the required parameters will be provided by the deployment ru
 
 Any **custom parameters** are picked up by Azure TRE API and will be queried from the user deploying the workspace bundle. Custom parameters should also be defined in the `template_schema.json` file at the root of the bundle. This file follows the [JSON schema standard](http://json-schema.org/) and can be used by a user interface to generate a UI for the user to input the parameters.
 
+### Template properties
+
+When authoring a `template_schema.json` file, you can reference properties from the resource being deployed, or its parent resources. For more information see [Pipeline Template Schema](../tre-templates/pipeline-templates/pipeline-schema.md#substituting-resource-property-values).
+
 ### Output
 
 !!! todo
@@ -109,7 +113,7 @@ The size of the `address_space` will default to `/24`, however other sizes can b
 
 The `address_space` allocation will only take place during the install phase of a deployment, as this is a breaking change to your template you should increment the major version of your template, this means a you must deploy a new resource instead of upgrading an existing one.
 
-In your install pipeline you also need to include a workspace upgrade step for the workspace to update it's `address_spaces` property.
+In your install and uninstall pipelines you also need to include a workspace upgrade step for the workspace to update it's `address_spaces` property.
 
 ```json
   "pipeline": {