diff --git a/src/c3nav/editor/forms.py b/src/c3nav/editor/forms.py
index 334b3164..e60e2024 100644
--- a/src/c3nav/editor/forms.py
+++ b/src/c3nav/editor/forms.py
@@ -135,6 +135,10 @@ class EditorFormBase(I18nModelFormMixin, ModelForm):
             self.fields['access_restriction'].label_from_instance = lambda obj: obj.title
             self.fields['access_restriction'].queryset = AccessRestriction.qs_for_request(self.request)
 
+        if 'base_mapdata_accessible' in self.fields:
+            if not request.user.is_superuser:
+                self.fields['base_mapdata_accessible'].disabled = True
+
         if space_id and 'target_space' in self.fields:
             Space = self.request.changeset.wrap_model('Space')
 
@@ -256,7 +260,7 @@ def create_editor_form(editor_model):
                        'outside', 'can_search', 'can_describe', 'geometry', 'single', 'altitude', 'short_label',
                        'origin_space', 'target_space', 'data', 'comment', 'slow_down_factor',
                        'extra_seconds', 'speed', 'description', 'speed_up', 'description_up', 'enter_description',
-                       'level_change_description',
+                       'level_change_description', 'base_mapdata_accessible',
                        'allow_levels', 'allow_spaces', 'allow_areas', 'allow_pois', 'left', 'top', 'right', 'bottom']
     field_names = [field.name for field in editor_model._meta.get_fields() if not field.one_to_many]
     existing_fields = [name for name in possible_fields if name in field_names]
diff --git a/src/c3nav/mapdata/migrations/0071_space_base_mapdata_accessible.py b/src/c3nav/mapdata/migrations/0071_space_base_mapdata_accessible.py
new file mode 100644
index 00000000..822a24d8
--- /dev/null
+++ b/src/c3nav/mapdata/migrations/0071_space_base_mapdata_accessible.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.1.1 on 2018-11-20 22:00
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mapdata', '0070_auto_20180918_1736'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='space',
+            name='base_mapdata_accessible',
+            field=models.BooleanField(default=False, verbose_name='always accessible (overwrites base mapdata setting)'),
+        ),
+    ]
diff --git a/src/c3nav/mapdata/models/geometry/level.py b/src/c3nav/mapdata/models/geometry/level.py
index 3fa51773..7f059df9 100644
--- a/src/c3nav/mapdata/models/geometry/level.py
+++ b/src/c3nav/mapdata/models/geometry/level.py
@@ -114,6 +114,8 @@ class Space(LevelGeometryMixin, SpecificLocation, models.Model):
                                  validators=[MinValueValidator(Decimal('0'))])
     outside = models.BooleanField(default=False, verbose_name=_('only outside of building'))
     enter_description = I18nField(_('Enter description'), blank=True, fallback_language=None)
+    base_mapdata_accessible = models.BooleanField(default=False,
+                                                  verbose_name=_('always accessible (overwrites base mapdata setting)'))
 
     class Meta:
         verbose_name = _('Space')