diff --git a/zaza/utilities/deployment_env.py b/zaza/utilities/deployment_env.py
index 5ea73e6e..96d75efa 100644
--- a/zaza/utilities/deployment_env.py
+++ b/zaza/utilities/deployment_env.py
@@ -85,7 +85,7 @@ def parse_option_list_string(option_list, delimiter=None):
     return settings
 
 
-def get_overlay_ppas(model_alias='default_alias'):
+def get_overlay_ppas(model_alias='default_alias', application=None):
     """Get overlay_ppas from global_config.
 
     In the config file for the tests, the tests_options.overlay_ppa option
@@ -97,17 +97,25 @@ def get_overlay_ppas(model_alias='default_alias'):
 
     :param model_alias: Name of model alias, defaults to 'default_alias'.
     :type model_alias: Option[str]
+    :param application: Name of application to retrieve config for.
+    :type application: Option[str]
     :returns: List of overlay PPAs.
     :rtype: Option[List[Any]]
     """
     config = zaza.global_options.get_options()
+    config_overlay_ppas = None
     try:
-        return config[model_alias].overlay_ppas
+        config_overlay_ppas = config[model_alias].overlay_ppas
     except KeyError:
         try:
-            return config.overlay_ppas
+            config_overlay_ppas = config.overlay_ppas
         except KeyError:
             pass
+    if config_overlay_ppas and application:
+        return [overlay_ppa
+                for overlay_ppa in config_overlay_ppas
+                if (isinstance(overlay_ppa, dict) and
+                    application in overlay_ppa)] or None
     return None
 
 
@@ -144,6 +152,26 @@ def _parse_overlay_ppa_v2(overlay_ppa):
             'key': overlay_ppa['key']}
 
 
+def _parse_overlay_ppa_v3(overlay_ppa):
+    """Parse per application overlay_ppa config.
+
+    Example YAML excerpt:
+        overlay_ppas:
+          application_name:
+            - ppa:ubuntu-security-proposed/ppa
+          other_application_name:
+            - source: "deb https://user:pass@private-ppa.launchpad"
+              key: |
+                -----BEGIN PGP PUBLIC KEY BLOCK-----
+                ....
+                -----END PGP PUBLIC KEY BLOCK-----
+    :param overlay_ppa: Element of overlay_ppas configuration.
+    :type overlay_ppa: Dict[str,List[Any]]
+    :returns
+    """
+    # {'application': ['plain', {'source': 'fakesource', 'key': 'fakekey'}]}
+
+
 def parse_overlay_ppa(overlay_ppa):
     """Parse multiple versions of overlay_ppas elements.