diff --git a/esphome/build_helpers/ccache.py b/esphome/build_helpers/ccache.py
index dfceaabf1c..82d62615ee 100644
--- a/esphome/build_helpers/ccache.py
+++ b/esphome/build_helpers/ccache.py
@@ -8,12 +8,13 @@ import os
 from pathlib import Path
 
 from esphome.framework_helpers import strip_win_long_path_prefix, tool_version_runs
+from esphome.helpers import FALSY_BOOL_STRINGS, TRUTHY_BOOL_STRINGS
 
 _LOGGER = logging.getLogger(__name__)
 
-# esphome cv.boolean's spelling tables plus the 1/0 env convention
-TRUTHY_ENV_STRINGS = frozenset({"1", "true", "yes", "on", "enable"})
-FALSY_ENV_STRINGS = frozenset({"0", "false", "no", "off", "disable"})
+# cv.boolean's spelling tables plus the 1/0 env convention
+TRUTHY_ENV_STRINGS = TRUTHY_BOOL_STRINGS | {"1"}
+FALSY_ENV_STRINGS = FALSY_BOOL_STRINGS | {"0"}
 
 
 def _ccache_runs(ccache: str) -> bool:
diff --git a/esphome/config_validation.py b/esphome/config_validation.py
index 98001d5d5b..09962e8c95 100644
--- a/esphome/config_validation.py
+++ b/esphome/config_validation.py
@@ -93,7 +93,13 @@ from esphome.core import (
 )
 from esphome.enum import StrEnum
 from esphome.expression import SUBSTITUTION_VARIABLE_PROG as VARIABLE_PROG
-from esphome.helpers import add_class_to_obj, docs_url, list_starts_with
+from esphome.helpers import (
+    FALSY_BOOL_STRINGS,
+    TRUTHY_BOOL_STRINGS,
+    add_class_to_obj,
+    docs_url,
+    list_starts_with,
+)
 from esphome.schema_extractors import (
     SCHEMA_EXTRACT,
     schema_extractor,
@@ -581,9 +587,9 @@ def boolean(value):
         return value
     if isinstance(value, str):
         value = value.lower()
-        if value in ("true", "yes", "on", "enable"):
+        if value in TRUTHY_BOOL_STRINGS:
             return True
-        if value in ("false", "no", "off", "disable"):
+        if value in FALSY_BOOL_STRINGS:
             return False
     raise Invalid(
         f"Expected boolean value, but cannot convert {value} to a boolean. Please use 'true' or 'false'"
diff --git a/esphome/helpers.py b/esphome/helpers.py
index 9b2a461ccd..fe3c383f59 100644
--- a/esphome/helpers.py
+++ b/esphome/helpers.py
@@ -31,6 +31,11 @@ SockAddr = IPv4SockAddr | IPv6SockAddr
 
 _LOGGER = logging.getLogger(__name__)
 
+# cv.boolean's closed spelling tables; shared so env-knob parsers cannot
+# drift from what configs accept
+TRUTHY_BOOL_STRINGS = frozenset({"true", "yes", "on", "enable"})
+FALSY_BOOL_STRINGS = frozenset({"false", "no", "off", "disable"})
+
 IS_MACOS = platform.system() == "Darwin"
 IS_WINDOWS = platform.system() == "Windows"
 IS_LINUX = platform.system() == "Linux"