diff --git a/demo/02/src/main/java/pl/amu/edu/demo/data/Housing.java b/demo/02/src/main/java/pl/amu/edu/demo/data/Housing.java
index 79d0f71..e8b8a41 100644
--- a/demo/02/src/main/java/pl/amu/edu/demo/data/Housing.java
+++ b/demo/02/src/main/java/pl/amu/edu/demo/data/Housing.java
@@ -2,11 +2,14 @@ package pl.amu.edu.demo.data;
 
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
+import lombok.Builder;
 import lombok.experimental.FieldDefaults;
 
-@AllArgsConstructor
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
 @FieldDefaults(level = AccessLevel.PUBLIC, makeFinal = true)
+@Builder
 public class Housing {
     Address address;
     boolean isApartment;
+    Double area;
 }