diff --git a/README.md b/README.md
index c58f15b..3d37acf 100644
--- a/README.md
+++ b/README.md
@@ -273,6 +273,9 @@ category: Notebooks
 price:
 price_type: # one of: FIXED, NEGOTIABLE, GIVE_AWAY
 
+special_attributes:
+  haus_mieten.zimmer_d: 5 # Zimmer
+
 shipping_type: # one of: PICKUP, SHIPPING, NOT_APPLICABLE
 
 # list of wildcard patterns to select images
diff --git a/kleinanzeigen_bot/__init__.py b/kleinanzeigen_bot/__init__.py
index c629427..785c239 100644
--- a/kleinanzeigen_bot/__init__.py
+++ b/kleinanzeigen_bot/__init__.py
@@ -404,6 +404,13 @@ class KleinanzeigenBot(SeleniumMixin):
         if ad_cfg["price_type"] != "GIVE_AWAY":
             self.web_input(By.ID, "pstad-price", ad_cfg["price"])
 
+        #############################
+        # set special properties of category
+        #############################
+        if ad_cfg["special_attributes"]:
+            for special_property_key, special_property_value in ad_cfg["special_attributes"]:
+                self.web_input(By.ID, special_property_key, special_property_value)
+
         #############################
         # set description
         #############################
diff --git a/kleinanzeigen_bot/resources/ad_fields.yaml b/kleinanzeigen_bot/resources/ad_fields.yaml
index efea629..c944e7e 100644
--- a/kleinanzeigen_bot/resources/ad_fields.yaml
+++ b/kleinanzeigen_bot/resources/ad_fields.yaml
@@ -3,6 +3,7 @@ type:
 title:
 description:
 category:
+special_attributes: {}
 price:
 price_type:
 shipping_type: