diff --git a/docs/sandbox.md b/docs/sandbox.md
index 7aef7af3..80705d9e 100644
--- a/docs/sandbox.md
+++ b/docs/sandbox.md
@@ -2143,6 +2143,16 @@ class SandboxTimeoutError(SandboxError)
 
 Raised when a sandbox operation times out
 
+<a id="koyeb/sandbox.utils.SandboxDeploymentError"></a>
+
+## SandboxDeploymentError Objects
+
+```python
+class SandboxDeploymentError(SandboxError)
+```
+
+Raised when a sandbox deployment reaches an error state
+
 <a id="koyeb/sandbox.executor_client"></a>
 
 # koyeb/sandbox.executor\_client
diff --git a/koyeb/sandbox/__init__.py b/koyeb/sandbox/__init__.py
index e3106218..b4b3d58a 100644
--- a/koyeb/sandbox/__init__.py
+++ b/koyeb/sandbox/__init__.py
@@ -17,7 +17,7 @@
 )
 from .filesystem import FileInfo, SandboxFilesystem
 from .sandbox import AsyncSandbox, ExposedPort, ProcessInfo, Sandbox
-from .utils import SandboxError, SandboxTimeoutError
+from .utils import SandboxDeploymentError, SandboxError, SandboxTimeoutError
 
 __all__ = [
     "Sandbox",
@@ -27,6 +27,7 @@
     "AsyncSandboxExecutor",
     "FileInfo",
     "SandboxStatus",
+    "SandboxDeploymentError",
     "SandboxError",
     "SandboxTimeoutError",
     "CommandResult",
diff --git a/koyeb/sandbox/sandbox.py b/koyeb/sandbox/sandbox.py
index 7213d628..aa9cb6d4 100644
--- a/koyeb/sandbox/sandbox.py
+++ b/koyeb/sandbox/sandbox.py
@@ -24,6 +24,7 @@
 from .utils import (
     DEFAULT_INSTANCE_WAIT_TIMEOUT,
     DEFAULT_POLL_INTERVAL,
+    SandboxDeploymentError,
     SandboxError,
     SandboxTimeoutError,
     async_wrapper,
@@ -388,12 +389,20 @@ def get_from_id(
             sandbox_secret=sandbox_secret,
         )
 
+    _DEPLOYMENT_ERROR_STATUSES = {
+        DeploymentStatus.ERROR,
+        DeploymentStatus.ERRORING,
+    }
+
     def _is_deployment_healthy(self) -> bool:
         """
         Check if the sandbox deployment status is HEALTHY via the API.
 
         Returns:
             bool: True if the deployment status is HEALTHY, False otherwise
+
+        Raises:
+            SandboxDeploymentError: If the deployment has reached a terminal error state
         """
         try:
             _, services_api, _, _, deployments_api = get_api_client(self.api_token)
@@ -404,7 +413,14 @@ def _is_deployment_healthy(self) -> bool:
                 return False
             deployment_response = deployments_api.get_deployment(deployment_id)
             status = deployment_response.deployment.status
+            if status in self._DEPLOYMENT_ERROR_STATUSES:
+                raise SandboxDeploymentError(
+                    f"Sandbox '{self.name}' deployment reached status {status.value}. "
+                    f"The sandbox will not become ready."
+                )
             return status == DeploymentStatus.HEALTHY
+        except SandboxDeploymentError:
+            raise
         except Exception:
             return False
 
diff --git a/koyeb/sandbox/utils.py b/koyeb/sandbox/utils.py
index dd1d46b5..0b942b31 100644
--- a/koyeb/sandbox/utils.py
+++ b/koyeb/sandbox/utils.py
@@ -486,3 +486,7 @@ class SandboxError(Exception):
 
 class SandboxTimeoutError(SandboxError):
     """Raised when a sandbox operation times out"""
+
+
+class SandboxDeploymentError(SandboxError):
+    """Raised when a sandbox deployment reaches an error state"""