diff --git a/.github/workflows/builder.yml b/.github/workflows/builder.yml
index e1f95c5c0a9..d206f8fe8c8 100644
--- a/.github/workflows/builder.yml
+++ b/.github/workflows/builder.yml
@@ -482,3 +482,56 @@ jobs:
           export TWINE_PASSWORD="${{ secrets.TWINE_TOKEN }}"
 
           twine upload dist/* --skip-existing
+
+  hassfest-image:
+    name: Build and test hassfest image
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+    needs: ["init", "build_base"]
+    if: github.repository_owner == 'home-assistant'
+    env:
+      HASSFEST_IMAGE_NAME: ghcr.io/home-assistant/hassfest
+      HASSFEST_IMAGE_TAG: ghcr.io/home-assistant/hassfest:${{ needs.init.outputs.version }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build Docker image
+        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        with:
+          context: ./script/hassfest/docker
+          build-args: BASE_IMAGE=ghcr.io/home-assistant/amd64-homeassistant:${{ needs.init.outputs.version }}
+          load: true
+          tags: ${{ env.HASSFEST_IMAGE_TAG }}
+
+      - name: Run hassfest against core
+        run: docker run --rm -v ${{ github.workspace }}/homeassistant:/github/workspace/homeassistant ${{ env.HASSFEST_IMAGE_TAG }} --core-integrations-path=/github/workspace/homeassistant/components
+
+      - name: Push Docker image
+        if: needs.init.outputs.channel != 'dev' && needs.init.outputs.publish == 'true'
+        id: push
+        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        with:
+          context: ./script/hassfest/docker
+          build-args: BASE_IMAGE=ghcr.io/home-assistant/amd64-homeassistant:${{ needs.init.outputs.version }}
+          push: true
+          tags: ${{ env.HASSFEST_IMAGE_TAG }},${{ env.HASSFEST_IMAGE_NAME }}:latest
+
+      - name: Generate artifact attestation
+        if: needs.init.outputs.channel != 'dev' && needs.init.outputs.publish == 'true'
+        uses: actions/attest-build-provenance@6149ea5740be74af77f260b9db67e633f6b0a9a1 # v1.4.2
+        with:
+          subject-name: ${{ env.HASSFEST_IMAGE_NAME }}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true
diff --git a/script/gen_requirements_all.py b/script/gen_requirements_all.py
index e8fdce6fa15..b2165289ad8 100755
--- a/script/gen_requirements_all.py
+++ b/script/gen_requirements_all.py
@@ -15,7 +15,7 @@ import tomllib
 from typing import Any
 
 from homeassistant.util.yaml.loader import load_yaml
-from script.hassfest.model import Integration
+from script.hassfest.model import Config, Integration
 
 # Requirements which can't be installed on all systems because they rely on additional
 # system packages. Requirements listed in EXCLUDED_REQUIREMENTS_ALL will be commented-out
@@ -270,7 +270,9 @@ def gather_recursive_requirements(
         seen = set()
 
     seen.add(domain)
-    integration = Integration(Path(f"homeassistant/components/{domain}"))
+    integration = Integration(
+        Path(f"homeassistant/components/{domain}"), _get_hassfest_config()
+    )
     integration.load_manifest()
     reqs = {x for x in integration.requirements if x not in CONSTRAINT_BASE}
     for dep_domain in integration.dependencies:
@@ -336,7 +338,8 @@ def gather_requirements_from_manifests(
     errors: list[str], reqs: dict[str, list[str]]
 ) -> None:
     """Gather all of the requirements from manifests."""
-    integrations = Integration.load_dir(Path("homeassistant/components"))
+    config = _get_hassfest_config()
+    integrations = Integration.load_dir(config.core_integrations_path, config)
     for domain in sorted(integrations):
         integration = integrations[domain]
 
@@ -584,6 +587,17 @@ def main(validate: bool, ci: bool) -> int:
     return 0
 
 
+def _get_hassfest_config() -> Config:
+    """Get hassfest config."""
+    return Config(
+        root=Path(".").absolute(),
+        specific_integrations=None,
+        action="validate",
+        requirements=True,
+        core_integrations_path=Path("homeassistant/components"),
+    )
+
+
 if __name__ == "__main__":
     _VAL = sys.argv[-1] == "validate"
     _CI = sys.argv[-1] == "ci"
diff --git a/script/hassfest/__main__.py b/script/hassfest/__main__.py
index ea3c56200a2..b48871b4651 100644
--- a/script/hassfest/__main__.py
+++ b/script/hassfest/__main__.py
@@ -107,6 +107,12 @@ def get_config() -> Config:
         default=ALL_PLUGIN_NAMES,
         help="Comma-separate list of plugins to run. Valid plugin names: %(default)s",
     )
+    parser.add_argument(
+        "--core-integrations-path",
+        type=pathlib.Path,
+        default=pathlib.Path("homeassistant/components"),
+        help="Path to core integrations",
+    )
     parsed = parser.parse_args()
 
     if parsed.action is None:
@@ -129,6 +135,7 @@ def get_config() -> Config:
         action=parsed.action,
         requirements=parsed.requirements,
         plugins=set(parsed.plugins),
+        core_integrations_path=parsed.core_integrations_path,
     )
 
 
@@ -146,12 +153,12 @@ def main() -> int:
         integrations = {}
 
         for int_path in config.specific_integrations:
-            integration = Integration(int_path)
+            integration = Integration(int_path, config)
             integration.load_manifest()
             integrations[integration.domain] = integration
 
     else:
-        integrations = Integration.load_dir(pathlib.Path("homeassistant/components"))
+        integrations = Integration.load_dir(config.core_integrations_path, config)
         plugins += HASS_PLUGINS
 
     for plugin in plugins:
diff --git a/script/hassfest/docker/Dockerfile b/script/hassfest/docker/Dockerfile
new file mode 100644
index 00000000000..8921d92307e
--- /dev/null
+++ b/script/hassfest/docker/Dockerfile
@@ -0,0 +1,22 @@
+ARG BASE_IMAGE=ghcr.io/home-assistant/home-assistant:beta
+FROM $BASE_IMAGE
+
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+COPY entrypoint.sh /entrypoint.sh
+
+RUN \
+    uv pip install stdlib-list==0.10.0 \
+        $(grep -e "^pipdeptree" -e "^tqdm" /usr/src/homeassistant/requirements_test.txt) \
+        $(grep -e "^ruff" /usr/src/homeassistant/requirements_test_pre_commit.txt)
+
+WORKDIR "/github/workspace"
+ENTRYPOINT ["/entrypoint.sh"]
+
+LABEL "name"="hassfest"
+LABEL "maintainer"="Home Assistant <hello@home-assistant.io>"
+
+LABEL "com.github.actions.name"="hassfest"
+LABEL "com.github.actions.description"="Run hassfest to validate standalone integration repositories"
+LABEL "com.github.actions.icon"="terminal"
+LABEL "com.github.actions.color"="gray-dark"
diff --git a/script/hassfest/docker/entrypoint.sh b/script/hassfest/docker/entrypoint.sh
new file mode 100755
index 00000000000..33330f63161
--- /dev/null
+++ b/script/hassfest/docker/entrypoint.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bashio
+declare -a integrations
+declare integration_path
+
+shopt -s globstar nullglob
+for manifest in **/manifest.json; do
+    manifest_path=$(realpath "${manifest}")
+    integrations+=(--integration-path "${manifest_path%/*}")
+done
+
+if [[ ${#integrations[@]} -eq 0 ]]; then
+    bashio::exit.nok "No integrations found!"
+fi
+
+cd /usr/src/homeassistant
+exec python3 -m script.hassfest --action validate "${integrations[@]}" "$@"
\ No newline at end of file
diff --git a/script/hassfest/model.py b/script/hassfest/model.py
index 736fb6874be..63e9b025ed4 100644
--- a/script/hassfest/model.py
+++ b/script/hassfest/model.py
@@ -29,6 +29,7 @@ class Config:
     root: pathlib.Path
     action: Literal["validate", "generate"]
     requirements: bool
+    core_integrations_path: pathlib.Path
     errors: list[Error] = field(default_factory=list)
     cache: dict[str, Any] = field(default_factory=dict)
     plugins: set[str] = field(default_factory=set)
@@ -105,7 +106,7 @@ class Integration:
     """Represent an integration in our validator."""
 
     @classmethod
-    def load_dir(cls, path: pathlib.Path) -> dict[str, Integration]:
+    def load_dir(cls, path: pathlib.Path, config: Config) -> dict[str, Integration]:
         """Load all integrations in a directory."""
         assert path.is_dir()
         integrations: dict[str, Integration] = {}
@@ -123,13 +124,14 @@ class Integration:
                 )
                 continue
 
-            integration = cls(fil)
+            integration = cls(fil, config)
             integration.load_manifest()
             integrations[integration.domain] = integration
 
         return integrations
 
     path: pathlib.Path
+    _config: Config
     _manifest: dict[str, Any] | None = None
     manifest_path: pathlib.Path | None = None
     errors: list[Error] = field(default_factory=list)
@@ -150,7 +152,9 @@ class Integration:
     @property
     def core(self) -> bool:
         """Core integration."""
-        return self.path.as_posix().startswith("homeassistant/components")
+        return self.path.as_posix().startswith(
+            self._config.core_integrations_path.as_posix()
+        )
 
     @property
     def disabled(self) -> str | None:
diff --git a/tests/hassfest/test_requirements.py b/tests/hassfest/test_requirements.py
index f3b008a6113..433e63d904c 100644
--- a/tests/hassfest/test_requirements.py
+++ b/tests/hassfest/test_requirements.py
@@ -4,7 +4,7 @@ from pathlib import Path
 
 import pytest
 
-from script.hassfest.model import Integration
+from script.hassfest.model import Config, Integration
 from script.hassfest.requirements import validate_requirements_format
 
 
@@ -13,6 +13,13 @@ def integration():
     """Fixture for hassfest integration model."""
     return Integration(
         path=Path("homeassistant/components/test"),
+        _config=Config(
+            root=Path(".").absolute(),
+            specific_integrations=None,
+            action="validate",
+            requirements=True,
+            core_integrations_path=Path("homeassistant/components"),
+        ),
         _manifest={
             "domain": "test",
             "documentation": "https://example.com",
diff --git a/tests/hassfest/test_version.py b/tests/hassfest/test_version.py
index bfe15018fe2..30677356101 100644
--- a/tests/hassfest/test_version.py
+++ b/tests/hassfest/test_version.py
@@ -1,5 +1,7 @@
 """Tests for hassfest version."""
 
+from pathlib import Path
+
 import pytest
 import voluptuous as vol
 
@@ -7,13 +9,22 @@ from script.hassfest.manifest import (
     CUSTOM_INTEGRATION_MANIFEST_SCHEMA,
     validate_version,
 )
-from script.hassfest.model import Integration
+from script.hassfest.model import Config, Integration
 
 
 @pytest.fixture
 def integration():
     """Fixture for hassfest integration model."""
-    integration = Integration("")
+    integration = Integration(
+        "",
+        _config=Config(
+            root=Path(".").absolute(),
+            specific_integrations=None,
+            action="validate",
+            requirements=True,
+            core_integrations_path=Path("homeassistant/components"),
+        ),
+    )
     integration._manifest = {
         "domain": "test",
         "documentation": "https://example.com",