diff --git a/app/controllers/realEstateTypes.js b/app/controllers/realEstateTypes.js
index f021f04..d1a6411 100644
--- a/app/controllers/realEstateTypes.js
+++ b/app/controllers/realEstateTypes.js
@@ -15,8 +15,15 @@ const getRealEstateTypes = (req, res) => {
 const postRealEstateTypes = async (req, res) => {
   const searchRequest = await currentSearchRequest(req);
 
-  //TODO: check if selected real estate type is valid
+  const validRealEstateTypes = Object.keys(AD_CATEGORY).filter(
+    category => !!AD_CATEGORY[category].title
+  );
+
   const selectedRealEstateType = req.body.realEstateType || null;
+  if (validRealEstateTypes.indexOf(selectedRealEstateType) === -1) {
+    res.render("notFound", { title: " " });
+    return;
+  }
 
   const nextStepPage = req.query.nextStep || "lokacija";