diff --git a/homeassistant/components/aurora_abb_powerone/config_flow.py b/homeassistant/components/aurora_abb_powerone/config_flow.py
index a1e046f302f..f0093c62631 100644
--- a/homeassistant/components/aurora_abb_powerone/config_flow.py
+++ b/homeassistant/components/aurora_abb_powerone/config_flow.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from collections.abc import Mapping
 import logging
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 from aurorapy.client import AuroraError, AuroraSerialClient
 import serial.tools.list_ports
@@ -78,7 +78,7 @@ class AuroraABBConfigFlow(ConfigFlow, domain=DOMAIN):
     def __init__(self):
         """Initialise the config flow."""
         self.config = None
-        self._com_ports_list = None
+        self._com_ports_list: list[str] | None = None
         self._default_com_port = None
 
     async def async_step_user(
@@ -92,6 +92,8 @@ class AuroraABBConfigFlow(ConfigFlow, domain=DOMAIN):
             self._com_ports_list, self._default_com_port = result
             if self._default_com_port is None:
                 return self.async_abort(reason="no_serial_ports")
+            if TYPE_CHECKING:
+                assert isinstance(self._com_ports_list, list)
 
         # Handle the initial step.
         if user_input is not None:
diff --git a/homeassistant/components/device_automation/__init__.py b/homeassistant/components/device_automation/__init__.py
index 567b8fcc2d2..5e196f40aa1 100644
--- a/homeassistant/components/device_automation/__init__.py
+++ b/homeassistant/components/device_automation/__init__.py
@@ -29,7 +29,7 @@ from homeassistant.helpers import (
     device_registry as dr,
     entity_registry as er,
 )
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import ConfigType, VolSchemaType
 from homeassistant.loader import IntegrationNotFound
 from homeassistant.requirements import (
     RequirementsNotFound,
@@ -340,7 +340,7 @@ def async_get_entity_registry_entry_or_raise(
 
 @callback
 def async_validate_entity_schema(
-    hass: HomeAssistant, config: ConfigType, schema: vol.Schema
+    hass: HomeAssistant, config: ConfigType, schema: VolSchemaType
 ) -> ConfigType:
     """Validate schema and resolve entity registry entry id to entity_id."""
     config = schema(config)
diff --git a/homeassistant/components/group/config_flow.py b/homeassistant/components/group/config_flow.py
index b7341aff59a..4eb0f1cdd52 100644
--- a/homeassistant/components/group/config_flow.py
+++ b/homeassistant/components/group/config_flow.py
@@ -51,6 +51,7 @@ async def basic_group_options_schema(
     domain: str | list[str], handler: SchemaCommonFlowHandler | None
 ) -> vol.Schema:
     """Generate options schema."""
+    entity_selector: selector.Selector[Any] | vol.Schema
     if handler is None:
         entity_selector = selector.selector(
             {"entity": {"domain": domain, "multiple": True}}
diff --git a/homeassistant/components/knx/trigger.py b/homeassistant/components/knx/trigger.py
index 1df1ffd6c3b..82149b21561 100644
--- a/homeassistant/components/knx/trigger.py
+++ b/homeassistant/components/knx/trigger.py
@@ -13,7 +13,7 @@ from homeassistant.core import CALLBACK_TYPE, HassJob, HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import ConfigType, VolDictType
 
 from .const import DOMAIN
 from .schema import ga_validator
@@ -32,7 +32,7 @@ CONF_KNX_INCOMING: Final = "incoming"
 CONF_KNX_OUTGOING: Final = "outgoing"
 
 
-TELEGRAM_TRIGGER_SCHEMA: Final = {
+TELEGRAM_TRIGGER_SCHEMA: VolDictType = {
     vol.Optional(CONF_KNX_DESTINATION): vol.All(cv.ensure_list, [ga_validator]),
     vol.Optional(CONF_KNX_GROUP_VALUE_WRITE, default=True): cv.boolean,
     vol.Optional(CONF_KNX_GROUP_VALUE_RESPONSE, default=True): cv.boolean,
diff --git a/homeassistant/components/mysensors/helpers.py b/homeassistant/components/mysensors/helpers.py
index c456cfd1f11..f060f3313dc 100644
--- a/homeassistant/components/mysensors/helpers.py
+++ b/homeassistant/components/mysensors/helpers.py
@@ -6,6 +6,7 @@ from collections import defaultdict
 from collections.abc import Callable
 from enum import IntEnum
 import logging
+from typing import cast
 
 from mysensors import BaseAsyncGateway, Message
 from mysensors.sensor import ChildSensor
@@ -151,7 +152,7 @@ def get_child_schema(
 ) -> vol.Schema:
     """Return a child schema."""
     set_req = gateway.const.SetReq
-    child_schema = child.get_schema(gateway.protocol_version)
+    child_schema = cast(vol.Schema, child.get_schema(gateway.protocol_version))
     return child_schema.extend(
         {
             vol.Required(
diff --git a/homeassistant/components/sma/config_flow.py b/homeassistant/components/sma/config_flow.py
index 3bfb66c4849..fe26cbee2c8 100644
--- a/homeassistant/components/sma/config_flow.py
+++ b/homeassistant/components/sma/config_flow.py
@@ -43,7 +43,7 @@ class SmaConfigFlow(ConfigFlow, domain=DOMAIN):
 
     def __init__(self) -> None:
         """Initialize."""
-        self._data = {
+        self._data: dict[str, Any] = {
             CONF_HOST: vol.UNDEFINED,
             CONF_SSL: False,
             CONF_VERIFY_SSL: True,
diff --git a/homeassistant/components/zwave_js/helpers.py b/homeassistant/components/zwave_js/helpers.py
index 598cf2f78f6..737b8deff34 100644
--- a/homeassistant/components/zwave_js/helpers.py
+++ b/homeassistant/components/zwave_js/helpers.py
@@ -40,7 +40,7 @@ from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import device_registry as dr, entity_registry as er
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.group import expand_entity_ids
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import ConfigType, VolSchemaType
 
 from .const import (
     ATTR_COMMAND_CLASS,
@@ -479,7 +479,9 @@ def copy_available_params(
     )
 
 
-def get_value_state_schema(value: ZwaveValue) -> vol.Schema | None:
+def get_value_state_schema(
+    value: ZwaveValue,
+) -> VolSchemaType | vol.Coerce | vol.In | None:
     """Return device automation schema for a config entry."""
     if isinstance(value, ConfigurationValue):
         min_ = value.metadata.min
diff --git a/homeassistant/helpers/config_validation.py b/homeassistant/helpers/config_validation.py
index 0463bb07e11..558baaeb779 100644
--- a/homeassistant/helpers/config_validation.py
+++ b/homeassistant/helpers/config_validation.py
@@ -108,6 +108,7 @@ from homeassistant.util.yaml.objects import NodeStrClass
 
 from . import script_variables as script_variables_helper, template as template_helper
 from .frame import get_integration_logger
+from .typing import VolDictType, VolSchemaType
 
 TIME_PERIOD_ERROR = "offset {} should be format 'HH:MM', 'HH:MM:SS' or 'HH:MM:SS.F'"
 
@@ -980,8 +981,8 @@ def removed(
 
 def key_value_schemas(
     key: str,
-    value_schemas: dict[Hashable, vol.Schema],
-    default_schema: vol.Schema | None = None,
+    value_schemas: dict[Hashable, VolSchemaType],
+    default_schema: VolSchemaType | None = None,
     default_description: str | None = None,
 ) -> Callable[[Any], dict[Hashable, Any]]:
     """Create a validator that validates based on a value for specific key.
@@ -1355,7 +1356,7 @@ NUMERIC_STATE_THRESHOLD_SCHEMA = vol.Any(
     vol.All(str, entity_domain(["input_number", "number", "sensor", "zone"])),
 )
 
-CONDITION_BASE_SCHEMA = {
+CONDITION_BASE_SCHEMA: VolDictType = {
     vol.Optional(CONF_ALIAS): string,
     vol.Optional(CONF_ENABLED): vol.Any(boolean, template),
 }
diff --git a/homeassistant/helpers/entity_platform.py b/homeassistant/helpers/entity_platform.py
index 6774780f00f..d868e582f8f 100644
--- a/homeassistant/helpers/entity_platform.py
+++ b/homeassistant/helpers/entity_platform.py
@@ -985,7 +985,7 @@ class EntityPlatform:
     def async_register_entity_service(
         self,
         name: str,
-        schema: VolDictType | VolSchemaType,
+        schema: VolDictType | VolSchemaType | None,
         func: str | Callable[..., Any],
         required_features: Iterable[int] | None = None,
         supports_response: SupportsResponse = SupportsResponse.NONE,
diff --git a/homeassistant/helpers/llm.py b/homeassistant/helpers/llm.py
index 480b9cb5237..4410de67ef2 100644
--- a/homeassistant/helpers/llm.py
+++ b/homeassistant/helpers/llm.py
@@ -660,6 +660,7 @@ class ScriptTool(Tool):
                     description = config.get("description")
                     if not description:
                         description = config.get("name")
+                    key: vol.Marker
                     if config.get("required"):
                         key = vol.Required(field, description=description)
                     else:
diff --git a/homeassistant/helpers/selector.py b/homeassistant/helpers/selector.py
index 16aaa40db86..5a542657d10 100644
--- a/homeassistant/helpers/selector.py
+++ b/homeassistant/helpers/selector.py
@@ -1182,7 +1182,7 @@ class SelectSelector(Selector[SelectSelectorConfig]):
                     for option in cast(Sequence[SelectOptionDict], config_options)
                 ]
 
-        parent_schema = vol.In(options)
+        parent_schema: vol.In | vol.Any = vol.In(options)
         if self.config["custom_value"]:
             parent_schema = vol.Any(parent_schema, str)