diff --git a/smart-house-web/backend/src/house.rs b/smart-house-web/backend/src/house.rs
index b1007ac..15876a1 100644
--- a/smart-house-web/backend/src/house.rs
+++ b/smart-house-web/backend/src/house.rs
@@ -1,5 +1,5 @@
 use serde::{Deserialize, Serialize};
-use std::fmt::Display;
+use std::{collections::HashMap, fmt::Display};
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct PowerSocket {
@@ -77,3 +77,33 @@ impl From<Thermometer> for Device {
         Device::Thermometer(value)
     }
 }
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Room {
+    devices: HashMap<String, Device>,
+}
+
+impl Room {
+    pub fn new(devices: HashMap<String, Device>) -> Self {
+        Self { devices }
+    }
+
+    pub fn report(&self) -> Vec<impl Display> {
+        let mut output = Vec::with_capacity(self.devices.len());
+        for (name, device) in self.devices.iter() {
+            output.push(format!("{} : {}", name, device.report()));
+        }
+        output
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct House {
+    rooms: HashMap<String, Room>,
+}
+
+impl House {
+    pub fn new(rooms: HashMap<String, Room>) -> Self {
+        Self { rooms }
+    }
+}
diff --git a/smart-house-web/backend/src/lib.rs b/smart-house-web/backend/src/lib.rs
index 5686d22..aaa7e18 100644
--- a/smart-house-web/backend/src/lib.rs
+++ b/smart-house-web/backend/src/lib.rs
@@ -34,4 +34,4 @@ mod server;
 pub use server::run_server;
 
 mod house;
-pub use house::{Device, PowerSocket, Thermometer};
+pub use house::{Device, House, PowerSocket, Room, Thermometer};