diff --git a/invenio_communities/notifications/builders.py b/invenio_communities/notifications/builders.py
index 4e5a293f3..0beb82a8b 100644
--- a/invenio_communities/notifications/builders.py
+++ b/invenio_communities/notifications/builders.py
@@ -231,11 +231,6 @@ class SubComInvitationBuilderBase(SubCommunityBuilderBase):
         EntityResolve("executing_user"),
     ]
 
-    recipients = [
-        CommunityMembersRecipient("request.created_by", roles=["owner", "manager"]),
-        CommunityMembersRecipient("request.receiver", roles=["owner", "manager"]),
-    ]
-
 
 class SubComInvitationCreate(SubComInvitationBuilderBase):
     """Notification builder for subcommunity request creation."""
@@ -292,3 +287,47 @@ class SubComInvitationExpire(SubComInvitationBuilderBase):
     recipients = [
         CommunityMembersRecipient("request.receiver", roles=["owner", "manager"]),
     ]
+
+
+#
+# Comments
+#
+class SubComCommentNotificationBuilderBase(SubCommunityBuilderBase):
+    """Notification builder for comment request event creation."""
+
+    context = [
+        EntityResolve(key="request"),
+        EntityResolve(key="request.created_by"),
+        EntityResolve(key="request.receiver"),
+        EntityResolve(key="request_event"),
+        EntityResolve(key="request_event.created_by"),
+    ]
+
+    @classmethod
+    def build(cls, request, request_event):
+        """Build notification with request context."""
+        return Notification(
+            type=cls.type,
+            context={
+                "request": EntityResolverRegistry.reference_entity(request),
+                "request_event": EntityResolverRegistry.reference_entity(request_event),
+            },
+        )
+
+    recipient_filters = [
+        # do not send notification to user creating the comment
+        UserRecipientFilter(key="request_event.created_by"),
+        UserPreferencesRecipientFilter(),
+    ]
+
+
+class SubComReqCommentNotificationBuilder(SubComCommentNotificationBuilderBase):
+    """Notification builder for comment request event creation."""
+
+    type = f"comment-{SubCommunityBuilderBase.type}.create"
+
+
+class SubComInvCommentNotificationBuilder(SubComCommentNotificationBuilderBase):
+    """Notification builder for comment request event creation."""
+
+    type = f"comment-{SubComInvitationBuilderBase.type}.create"
diff --git a/invenio_communities/subcommunities/services/request.py b/invenio_communities/subcommunities/services/request.py
index c4ed86bf2..1577ac9b2 100644
--- a/invenio_communities/subcommunities/services/request.py
+++ b/invenio_communities/subcommunities/services/request.py
@@ -15,6 +15,11 @@
 import invenio_communities.notifications.builders as notifications
 from invenio_communities.proxies import current_communities
 
+from ...notifications.builders import (
+    SubComInvCommentNotificationBuilder,
+    SubComReqCommentNotificationBuilder,
+)
+
 
 class AcceptSubcommunity(actions.AcceptAction):
     """Represents an accept action used to accept a subcommunity."""
@@ -64,6 +69,8 @@ class SubCommunityRequest(RequestType):
     allowed_receiver_ref_types = ["community"]
     allowed_topic_ref_types = ["community"]
 
+    comment_notification_builder = SubComReqCommentNotificationBuilder
+
     available_actions = {
         "delete": actions.DeleteAction,
         "create": actions.CreateAndSubmitAction,
@@ -149,6 +156,8 @@ class SubCommunityInvitationRequest(RequestType):
     allowed_receiver_ref_types = ["community"]
     allowed_topic_ref_types = ["community"]
 
+    comment_notification_builder = SubComInvCommentNotificationBuilder
+
     available_actions = {
         "delete": actions.DeleteAction,
         "cancel": actions.CancelAction,
diff --git a/invenio_communities/templates/semantic-ui/invenio_communities/details/new_subcommunity.html b/invenio_communities/templates/semantic-ui/invenio_communities/details/new_subcommunity.html
index ff748404e..3d5afbd27 100644
--- a/invenio_communities/templates/semantic-ui/invenio_communities/details/new_subcommunity.html
+++ b/invenio_communities/templates/semantic-ui/invenio_communities/details/new_subcommunity.html
@@ -9,7 +9,7 @@
 
 {% extends "invenio_communities/details/base.html" %}
 
-{%- set title = _("New community") -%}
+{%- set title = _("New subcommunity") -%}
 
 {%- block javascript %}
 {{ super() }}
diff --git a/invenio_communities/templates/semantic-ui/invenio_notifications/comment-subcommunity-invitation-request.create.jinja b/invenio_communities/templates/semantic-ui/invenio_notifications/comment-subcommunity-invitation-request.create.jinja
new file mode 100644
index 000000000..4a2b75a8e
--- /dev/null
+++ b/invenio_communities/templates/semantic-ui/invenio_notifications/comment-subcommunity-invitation-request.create.jinja
@@ -0,0 +1,62 @@
+{% set invenio_request = notification.context.request %}
+{% set invenio_request_event = notification.context.request_event %}
+
+{# created_by is either a resolved user or an email (for guests) #}
+{% set event_creator_name = invenio_request_event.created_by.username or invenio_request_event.created_by %}
+{% set request_id = invenio_request.id %}
+{% set request_event_content = invenio_request_event.payload.content | safe %}
+{% set request_title = invenio_request.title | safe %}
+{# It would be more natural to send to receiver, but for now we send to parent #}
+{% set parent_community = invenio_request.created_by.slug %}
+
+{# TODO: use request.links.self_html when issue issue is resolved: https://github.com/inveniosoftware/invenio-rdm-records/issues/1327 #}
+{% set request_link = "{ui}/communities/{parent_community}/requests/{request_id}".format(
+    ui=config.SITE_UI_URL, parent_community=parent_community, request_id=request_id
+    )
+%}
+{% set account_settings_link = "{ui}/account/settings/notifications".format(
+    ui=config.SITE_UI_URL
+    )
+%}
+
+{%- block subject -%}
+{{ _("💬 New comment on '{request_title}'").format(request_title=request_title) }}
+{%- endblock subject -%}
+
+{%- block html_body -%}
+<table style="font-family:'Lato',Helvetica,Arial,sans-serif;border-spacing:15px">
+    <tr>
+        <td>{{ _("'@{user_name}' commented on '{request_title}':").format(user_name=event_creator_name, request_title=request_title) }}</td>
+    </tr>
+    <tr>
+        <td><em>{{ request_event_content }}</em></td>
+    </tr>
+    <tr>
+        <td><a href="{{ request_link }}" class="button">{{ _("Check out the request")}}</a></td>
+    </tr>
+    <tr>
+        <td><strong>_</strong></td>
+    </tr>
+    <tr>
+        <td style="font-size:smaller">{{ _("This is an auto-generated message. To manage notifications, visit your")}} <a href="{{account_settings_link}}">{{ _("account settings")}}</a>.</td>
+    </tr>
+</table>
+{%- endblock html_body %}
+
+{%- block plain_body -%}
+{{ _("@{user_name} commented on '{request_title}'").format(user_name=event_creator_name, request_title=request_title) }}.
+
+{{ request_event_content }}
+
+{{ _("Check out the request: {request_link}").format(request_link=request_link) }}
+
+{%- endblock plain_body %}
+
+{# Markdown for Slack/Mattermost/chat #}
+{%- block md_body -%}
+{{ _("*@{user_name}* commented on *{request_title}*").format(user_name=event_creator_name, request_title=request_title) }}.
+
+{{ request_event_content }}
+
+[{{_("Check out the request")}}]({{request_link}})
+{%- endblock md_body %}
diff --git a/invenio_communities/templates/semantic-ui/invenio_notifications/comment-subcommunity-request.create.jinja b/invenio_communities/templates/semantic-ui/invenio_notifications/comment-subcommunity-request.create.jinja
new file mode 100644
index 000000000..756968fb0
--- /dev/null
+++ b/invenio_communities/templates/semantic-ui/invenio_notifications/comment-subcommunity-request.create.jinja
@@ -0,0 +1,61 @@
+{% set invenio_request = notification.context.request %}
+{% set invenio_request_event = notification.context.request_event %}
+
+{# created_by is either a resolved user or an email (for guests) #}
+{% set event_creator_name = invenio_request_event.created_by.username or invenio_request_event.created_by %}
+{% set request_id = invenio_request.id %}
+{% set request_event_content = invenio_request_event.payload.content | safe %}
+{% set request_title = invenio_request.title | safe %}
+{% set parent_community = invenio_request.receiver.slug %}
+
+{# TODO: use request.links.self_html when issue issue is resolved: https://github.com/inveniosoftware/invenio-rdm-records/issues/1327 #}
+{% set request_link = "{ui}/communities/{parent_community}/requests/{request_id}".format(
+    ui=config.SITE_UI_URL, parent_community=parent_community, request_id=request_id
+    )
+%}
+{% set account_settings_link = "{ui}/account/settings/notifications".format(
+    ui=config.SITE_UI_URL
+    )
+%}
+
+{%- block subject -%}
+{{ _("💬 New comment on '{request_title}'").format(request_title=request_title) }}
+{%- endblock subject -%}
+
+{%- block html_body -%}
+<table style="font-family:'Lato',Helvetica,Arial,sans-serif;border-spacing:15px">
+    <tr>
+        <td>{{ _("'@{user_name}' commented on '{request_title}':").format(user_name=event_creator_name, request_title=request_title) }}</td>
+    </tr>
+    <tr>
+        <td><em>{{ request_event_content }}</em></td>
+    </tr>
+    <tr>
+        <td><a href="{{ request_link }}" class="button">{{ _("Check out the request")}}</a></td>
+    </tr>
+    <tr>
+        <td><strong>_</strong></td>
+    </tr>
+    <tr>
+        <td style="font-size:smaller">{{ _("This is an auto-generated message. To manage notifications, visit your")}} <a href="{{account_settings_link}}">{{ _("account settings")}}</a>.</td>
+    </tr>
+</table>
+{%- endblock html_body %}
+
+{%- block plain_body -%}
+{{ _("@{user_name} commented on '{request_title}'").format(user_name=event_creator_name, request_title=request_title) }}.
+
+{{ request_event_content }}
+
+{{ _("Check out the request: {request_link}").format(request_link=request_link) }}
+
+{%- endblock plain_body %}
+
+{# Markdown for Slack/Mattermost/chat #}
+{%- block md_body -%}
+{{ _("*@{user_name}* commented on *{request_title}*").format(user_name=event_creator_name, request_title=request_title) }}.
+
+{{ request_event_content }}
+
+[{{_("Check out the request")}}]({{request_link}})
+{%- endblock md_body %}