diff --git a/marshmallow_jsonschema/base.py b/marshmallow_jsonschema/base.py
index fbda2aa..507785d 100644
--- a/marshmallow_jsonschema/base.py
+++ b/marshmallow_jsonschema/base.py
@@ -92,7 +92,7 @@ def get_properties(self, obj):
 
         for field_name, field in sorted(obj.fields.items()):
             if hasattr(field, '_jsonschema_type_mapping'):
-                schema = field._jsonschema_type_mapping()
+                schema = self.__class__._from_custom_field_type(field)
             elif field.__class__ in mapping:
                 pytype = mapping[field.__class__]
                 schema = self.__class__._from_python_type(field, pytype)
@@ -166,3 +166,20 @@ def _from_nested_schema(cls, field):
             }
 
         return schema
+
+    @classmethod
+    def _from_custom_field_type(cls, field):
+        json_schema = field._jsonschema_type_mapping()
+
+        if field.default is not missing:
+            json_schema['default'] = field.default
+
+        if field.metadata.get('metadata', {}).get('description'):
+            json_schema['description'] = (
+                field.metadata['metadata'].get('description')
+            )
+
+        if field.metadata.get('metadata', {}).get('title'):
+            json_schema['title'] = field.metadata['metadata'].get('title')
+
+        return json_schema
diff --git a/tests/test_dump.py b/tests/test_dump.py
index 039c72f..c09a3de 100644
--- a/tests/test_dump.py
+++ b/tests/test_dump.py
@@ -186,9 +186,18 @@ def _serialize(self, value, attr, obj):
 
     class UserSchema(Schema):
         name = fields.String(required=True)
-        favourite_colour = Colour()
+        favourite_colour = Colour(default='#ffffff',
+                                  metadata=dict(
+                                    description="User's favorite colour",
+                                    title="Colour")
+                                  )
 
     schema = UserSchema()
     json_schema = JSONSchema()
     dumped = json_schema.dump(schema).data
-    assert dumped['properties']['favourite_colour'] == {'type': 'string'}
+    assert dumped['properties']['favourite_colour'] == {
+        'type': 'string',
+        'default': '#ffffff',
+        'description': "User's favorite colour",
+        'title': "Colour",
+    }