diff --git a/res/css/views/dialogs/_CreateSubspaceDialog.scss b/res/css/views/dialogs/_CreateSubspaceDialog.scss
index c780da4b9e..1ec4731ae6 100644
--- a/res/css/views/dialogs/_CreateSubspaceDialog.scss
+++ b/res/css/views/dialogs/_CreateSubspaceDialog.scss
@@ -39,8 +39,14 @@ limitations under the License.
 
             .mx_BetaCard_betaPill {
                 margin-right: 8px;
+                vertical-align: middle;
             }
         }
+
+        .mx_JoinRuleDropdown + p {
+            color: $muted-fg-color;
+            font-size: $font-12px;
+        }
     }
 
     .mx_CreateSubspaceDialog_footer {
diff --git a/src/components/views/dialogs/CreateSubspaceDialog.tsx b/src/components/views/dialogs/CreateSubspaceDialog.tsx
index 12fd6a3232..6a81bb04df 100644
--- a/src/components/views/dialogs/CreateSubspaceDialog.tsx
+++ b/src/components/views/dialogs/CreateSubspaceDialog.tsx
@@ -110,6 +110,29 @@ const CreateSubspaceDialog: React.FC<IProps> = ({ space, onAddExistingSpaceClick
         }
     };
 
+    let joinRuleMicrocopy: JSX.Element;
+    if (joinRule === JoinRule.Restricted) {
+        joinRuleMicrocopy = <p>
+            { _t(
+                "Anyone in <SpaceName/> will be able to find and join.", {}, {
+                    SpaceName: () => <b>{ parentSpace.name }</b>,
+                },
+            ) }
+        </p>;
+    } else if (joinRule === JoinRule.Public) {
+        joinRuleMicrocopy = <p>
+            { _t(
+                "Anyone will be able to find and join this space, not just members of <SpaceName/>.", {}, {
+                    SpaceName: () => <b>{ parentSpace.name }</b>,
+                },
+            ) }
+        </p>;
+    } else if (joinRule === JoinRule.Invite) {
+        joinRuleMicrocopy = <p>
+            { _t("Only people invited will be able to find and join this space.") }
+        </p>;
+    }
+
     return <BaseDialog
         title={(
             <SubspaceSelector
@@ -154,6 +177,7 @@ const CreateSubspaceDialog: React.FC<IProps> = ({ space, onAddExistingSpaceClick
                         value={joinRule}
                         onChange={setJoinRule}
                     />
+                    { joinRuleMicrocopy }
                 </SpaceCreateForm>
             </div>
 
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index e6b96a132d..ef4537bddf 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -2219,6 +2219,9 @@
     "Visible to space members": "Visible to space members",
     "Block anyone not part of %(serverName)s from ever joining this room.": "Block anyone not part of %(serverName)s from ever joining this room.",
     "Create Room": "Create Room",
+    "Anyone in <SpaceName/> will be able to find and join.": "Anyone in <SpaceName/> will be able to find and join.",
+    "Anyone will be able to find and join this space, not just members of <SpaceName/>.": "Anyone will be able to find and join this space, not just members of <SpaceName/>.",
+    "Only people invited will be able to find and join this space.": "Only people invited will be able to find and join this space.",
     "Create a subspace": "Create a subspace",
     "Add a subspace to a space you manage.": "Add a subspace to a space you manage.",
     "Subspace visibility": "Subspace visibility",