diff --git a/sigi/admin/filterspecs.py b/sigi/admin/filterspecs.py
index 3e4a9a7..d926dab 100644
--- a/sigi/admin/filterspecs.py
+++ b/sigi/admin/filterspecs.py
@@ -2,6 +2,7 @@ from django.contrib.admin.filterspecs import FilterSpec, ChoicesFilterSpec
 from django.utils.encoding import smart_unicode
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext as _
+from sigi.apps.contatos.models import UnidadeFederativa
 
 class AlphabeticFilterSpec(ChoicesFilterSpec):
     """
@@ -38,6 +39,41 @@ class AlphabeticFilterSpec(ChoicesFilterSpec):
 FilterSpec.filter_specs.insert(0, (lambda f: getattr(f, 'alphabetic_filter', False),
                                    AlphabeticFilterSpec))
 
+class MunicipioUFFilterSpec(ChoicesFilterSpec):
+    """
+    Usage:
+
+      my_municipio_field.uf_filter = True
+
+    On Django 1.2 you will can specify a lookup on admin filters. Example:
+
+      list_filter = ('municipio__uf',)
+
+    """
+
+    def __init__(self, f, request, params, model, model_admin):
+        super(MunicipioUFFilterSpec, self).__init__(f, request, params, model,
+                                                    model_admin)
+        self.lookup_kwarg = '%s__uf__codigo_ibge__exact' % f.name
+        self.lookup_val = request.GET.get(self.lookup_kwarg, None)
+        self.lookup_choices = UnidadeFederativa.objects.all().order_by('nome')
+
+    def choices(self, cl):
+        yield {'selected': self.lookup_val is None,
+                'query_string': cl.get_query_string({}, [self.lookup_kwarg]),
+                'display': _('All')}
+        for val in self.lookup_choices:
+            yield {'selected': smart_unicode(val.codigo_ibge) == self.lookup_val,
+                    'query_string': cl.get_query_string({self.lookup_kwarg: val.codigo_ibge}),
+                    'display': val.nome}
+    def title(self):
+        return _('UF') % \
+            {'field_name': self.field.verbose_name}
+
+# registering the filter
+FilterSpec.filter_specs.insert(0, (lambda f: getattr(f, 'uf_filter', False),
+                                   MunicipioUFFilterSpec))
+
 class RangeValuesFilterSpec(FilterSpec):
     """
     Author: Willie Gollino (wgollino@yahoo.com)
diff --git a/sigi/apps/casas/admin.py b/sigi/apps/casas/admin.py
index 6ca42b6..6d73979 100644
--- a/sigi/apps/casas/admin.py
+++ b/sigi/apps/casas/admin.py
@@ -21,7 +21,7 @@ class CasaLegislativaAdmin(admin.ModelAdmin):
     inlines = (TelefonesInline, ContatosInline)
     list_display = ('nome', 'email', 'pagina_web', 'municipio')
     list_display_links = ('nome',)
-    list_filter = ('tipo',)
+    list_filter = ('tipo', 'municipio')
     fieldsets = (
         (None, {
             'fields': ('nome', 'sigla', 'tipo', 'cnpj', 'observacoes'),
diff --git a/sigi/apps/casas/models.py b/sigi/apps/casas/models.py
index c1844cd..338190c 100644
--- a/sigi/apps/casas/models.py
+++ b/sigi/apps/casas/models.py
@@ -34,6 +34,7 @@ class CasaLegislativa(models.Model):
         'contatos.Municipio',
         verbose_name='município'
     )
+    municipio.uf_filter = True
     cep = models.CharField(max_length=32)
     email = models.EmailField('e-mail', max_length=128, blank=True)
     pagina_web = models.URLField(