diff --git a/src/servala/core/admin.py b/src/servala/core/admin.py
index 746d5da..7d110d1 100644
--- a/src/servala/core/admin.py
+++ b/src/servala/core/admin.py
@@ -65,7 +65,8 @@ class OrganizationAdmin(admin.ModelAdmin):
 
     def get_readonly_fields(self, request, obj=None):
         readonly_fields = list(super().get_readonly_fields(request, obj) or [])
-        readonly_fields.append("namespace")  # Always read-only
+        if obj:  # If this is an edit (not a new organization)
+            readonly_fields.append("namespace")
         return readonly_fields
 
 
diff --git a/src/servala/core/migrations/0003_alter_organization_namespace.py b/src/servala/core/migrations/0003_alter_organization_namespace.py
deleted file mode 100644
index 3a01990..0000000
--- a/src/servala/core/migrations/0003_alter_organization_namespace.py
+++ /dev/null
@@ -1,24 +0,0 @@
-# Generated by Django 5.2b1 on 2025-04-09 14:05
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ("core", "0002_alter_controlplanecrd_options_and_more"),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name="organization",
-            name="namespace",
-            field=models.CharField(
-                help_text="This namespace will be used for all Kubernetes resources.",
-                max_length=20,
-                null=True,
-                unique=True,
-                verbose_name="Kubernetes Namespace",
-            ),
-        ),
-    ]
diff --git a/src/servala/core/models/organization.py b/src/servala/core/models/organization.py
index 7ebda11..62894d5 100644
--- a/src/servala/core/models/organization.py
+++ b/src/servala/core/models/organization.py
@@ -9,19 +9,19 @@ from django_scopes import ScopedManager, scopes_disabled
 
 from servala.core import rules as perms
 from servala.core.models.mixins import ServalaModelMixin
+from servala.core.validators import kubernetes_name_validator
 
 
 class Organization(ServalaModelMixin, models.Model):
     name = models.CharField(max_length=100, verbose_name=_("Name"))
-    # The namespace is generated as "org-{id}" in accordance with RFC 1035 Label Names.
-    # It is nullable as we need to write to the database in order to read the ID, but should
-    # not be null in practical use.
     namespace = models.CharField(
-        max_length=20,
+        max_length=63,
         verbose_name=_("Kubernetes Namespace"),
-        null=True,
         unique=True,
-        help_text=_("This namespace will be used for all Kubernetes resources."),
+        help_text=_(
+            "This namespace will be used for all Kubernetes resources. Cannot be changed after creation."
+        ),
+        validators=[kubernetes_name_validator],
     )
 
     billing_entity = models.ForeignKey(
@@ -90,13 +90,6 @@ class Organization(ServalaModelMixin, models.Model):
     def __str__(self):
         return self.name
 
-    def save(self, *args, **kwargs):
-        super().save(*args, **kwargs)
-        if not self.namespace:
-            # Set namespace after initial save to ensure we have an ID
-            self.namespace = f"org-{self.pk}"
-            self.save(update_fields=["namespace"])
-
 
 class BillingEntity(ServalaModelMixin, models.Model):
     """
diff --git a/src/servala/frontend/forms/organization.py b/src/servala/frontend/forms/organization.py
index 41cc26c..d582ce9 100644
--- a/src/servala/frontend/forms/organization.py
+++ b/src/servala/frontend/forms/organization.py
@@ -1,4 +1,6 @@
+from django import forms
 from django.forms import ModelForm
+from django.utils.translation import gettext_lazy as _
 
 from servala.core.models import Organization
 from servala.frontend.forms.mixins import HtmxMixin
@@ -7,4 +9,19 @@ from servala.frontend.forms.mixins import HtmxMixin
 class OrganizationForm(HtmxMixin, ModelForm):
     class Meta:
         model = Organization
-        fields = ("name",)
+        fields = ("name", "namespace")
+        widgets = {
+            "namespace": forms.TextInput(
+                attrs={
+                    "pattern": "[a-z0-9]([-a-z0-9]*[a-z0-9])?",
+                    "title": _(
+                        'Lowercase alphanumeric characters or "-", must start and end with alphanumeric'
+                    ),
+                }
+            )
+        }
+        help_texts = {
+            "namespace": _(
+                "This namespace will be used for all resources and cannot be changed later."
+            )
+        }
diff --git a/src/servala/frontend/templates/frontend/organizations/update.html b/src/servala/frontend/templates/frontend/organizations/update.html
index 0d55f22..993b76a 100644
--- a/src/servala/frontend/templates/frontend/organizations/update.html
+++ b/src/servala/frontend/templates/frontend/organizations/update.html
@@ -52,7 +52,7 @@
                     </th>
                     <td>
                         <div>{{ form.instance.namespace }}</div>
-                        <small class="text-muted">{% translate "System-generated namespace for Kubernetes resources." %}</small>
+                        <small class="text-muted">{% translate "The namespace cannot be changed after creation." %}</small>
                     </td>
                 </tr>
             </tbody>
diff --git a/src/tests/conftest.py b/src/tests/conftest.py
index d88870e..a69e50c 100644
--- a/src/tests/conftest.py
+++ b/src/tests/conftest.py
@@ -15,12 +15,16 @@ def origin():
 
 @pytest.fixture
 def organization(origin):
-    return Organization.objects.create(name="Test Org", origin=origin)
+    return Organization.objects.create(
+        name="Test Org", namespace="test-org", origin=origin
+    )
 
 
 @pytest.fixture
 def other_organization(origin):
-    return Organization.objects.create(name="Test Org Alternate", origin=origin)
+    return Organization.objects.create(
+        name="Test Org Alternate", namespace="test-org-alternate", origin=origin
+    )
 
 
 @pytest.fixture
diff --git a/src/tests/test_views.py b/src/tests/test_views.py
index 5ec429e..23475fc 100644
--- a/src/tests/test_views.py
+++ b/src/tests/test_views.py
@@ -23,7 +23,6 @@ def test_root_view_invalid_urls_404(client):
 def test_owner_can_access_dashboard(client, org_owner, organization):
     client.force_login(org_owner)
     response = client.get(organization.urls.base)
-    assert organization.namespace == f"org-{organization.pk}"
     assert response.status_code == 200
     assert organization.name in response.content.decode()