diff --git a/.github/workflows/test-validate-domain.yaml b/.github/workflows/test-validate-domain.yaml
new file mode 100644
index 00000000..f17fb7f7
--- /dev/null
+++ b/.github/workflows/test-validate-domain.yaml
@@ -0,0 +1,18 @@
+name: test-validate-domain
+
+on:
+  pull_request:
+    paths:
+    - "actions/validate-domain/**"
+  
+jobs:
+  validate-domain:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Test validate domain action
+        uses: ./actions/validate-domain
+        with:
+          chart-file: test/helm/Chart.yaml
diff --git a/actions/validate-domain/README.md b/actions/validate-domain/README.md
new file mode 100644
index 00000000..6273ea0d
--- /dev/null
+++ b/actions/validate-domain/README.md
@@ -0,0 +1,32 @@
+# validate-domain
+
+Validate that a Helm chart (`Chart.yaml`) contains an `annotations.domain` value that is one of a configured set of allowed domains.
+
+## ✨ What It Does
+
+The action:
+Checks if the `Chart.yaml` has the "domain" annotation and validates that the domain is in the domains list
+
+## Inputs
+
+| Name | Required | Default | Description |
+|------|----------|---------|-------------|
+| `chart-file` | no | `helm/Chart.yaml` | Path to the Helm chart file whose `annotations.domain` will be validated. |
+
+The set of allowed domains is constant (not configurable):
+
+```
+raster, vector, infra, 3d, app, dem, common
+```
+
+If you need to change or extend this list, update the action source or open a PR.
+
+
+## 🚀 Usage
+
+<!-- x-release-please-start-version -->
+```yaml
+      - name: Validate domain
+        uses: MapColonies/shared-workflows/actions/validate-domain@v1
+```
+<!-- x-release-please-end-version -->
diff --git a/actions/validate-domain/action.yaml b/actions/validate-domain/action.yaml
new file mode 100644
index 00000000..9c927fd9
--- /dev/null
+++ b/actions/validate-domain/action.yaml
@@ -0,0 +1,30 @@
+name: validate-domain
+description: "Validate that helm/Chart.yaml contains annotations.domain with an allowed value"
+
+inputs:
+  chart-file:
+    description: "Path to Chart.yaml"
+    required: false
+    default: "helm/Chart.yaml"
+
+runs:
+  using: composite
+  steps:
+    - name: Read domain annotation from Chart.yaml
+      id: get_domain
+      uses: mikefarah/yq@v4.48.2
+      with:
+        cmd: yq e '.annotations.domain' "${{ inputs.chart-file }}"
+
+    - name: Validate domain
+      env:
+        ALLOWED_DOMAINS: "raster,vector,infra,3d,app,dem,common"
+      shell: bash
+      run: |
+        DOMAIN="${{ steps.get_domain.outputs.result }}"
+        IFS=',' read -ra ALLOWED <<< "${{ env.ALLOWED_DOMAINS }}"
+
+        if ! printf "%s\n" "${ALLOWED[@]}" | grep -qx "$DOMAIN"; then
+          echo "Invalid domain: $DOMAIN"
+          exit 1
+        fi
diff --git a/release-please-config.json b/release-please-config.json
index 64e155e3..9cf27734 100644
--- a/release-please-config.json
+++ b/release-please-config.json
@@ -68,6 +68,11 @@
         "release-type": "simple",
         "package-name": "init-npm",
         "extra-files": ["README.md"]
+      },
+      "actions/validate-domain": {
+        "release-type": "simple",
+        "package-name": "validate-domain",
+        "extra-files": ["README.md"]
       }
     }
 }
diff --git a/test/helm/Chart.yaml b/test/helm/Chart.yaml
index 93afb8dd..870366a4 100644
--- a/test/helm/Chart.yaml
+++ b/test/helm/Chart.yaml
@@ -1,5 +1,7 @@
 apiVersion: v2
 name: hello-world-chart
+annotations:
+  domain: common
 description: A Helm chart for Kubernetes
 type: application
 version: 6.0.0