diff --git a/backend/app/routers/predictions.py b/backend/app/dtos/predictions.py
similarity index 100%
rename from backend/app/routers/predictions.py
rename to backend/app/dtos/predictions.py
diff --git a/backend/app/models/house.py b/backend/app/models/house.py
new file mode 100644
index 0000000..45c953e
--- /dev/null
+++ b/backend/app/models/house.py
@@ -0,0 +1,10 @@
+from sqlmodel import SQLModel, Field
+from uuid import uuid4
+
+class House(SQLModel, table=True):
+    id: int = Field(primary_key=True, default_factory=uuid4),
+    address: str
+    city: str
+    country: str
+    price: float
+    description: str = None
diff --git a/backend/app/models/owner.py b/backend/app/models/owner.py
new file mode 100644
index 0000000..fb034a2
--- /dev/null
+++ b/backend/app/models/owner.py
@@ -0,0 +1,7 @@
+from sqlmodel import SQLModel, Field
+from uuid import uuid4
+
+class Owner(SQLModel, table=True):
+    id: int = Field(default_factory=uuid4, primary_key=True)
+    name: str
+    email: str
diff --git a/backend/app/models/prediction.py b/backend/app/models/prediction.py
index 587255c..8a51284 100644
--- a/backend/app/models/prediction.py
+++ b/backend/app/models/prediction.py
@@ -5,15 +5,6 @@ class HousePredictionInput(BaseModel):
     square_feet: float = Field(..., gt=0, description="Square footage of the house")
     bedrooms: int = Field(..., ge=1, description="Number of bedrooms")
     bathrooms: float = Field(..., gt=0, description="Number of bathrooms")
-    
-    class Config:
-        json_schema_extra = {
-            "example": {
-                "square_feet": 2000,
-                "bedrooms": 3,
-                "bathrooms": 2.5
-            }
-        }
 
 class HousePredictionOutput(BaseModel):
     predicted_price: float
diff --git a/backend/app/models/user.py b/backend/app/models/user.py
new file mode 100644
index 0000000..4fed662
--- /dev/null
+++ b/backend/app/models/user.py
@@ -0,0 +1,7 @@
+from sqlmodel import SQLModel, Field
+
+class User(SQLModel, table=True):
+    id: int = Field(default=None, primary_key=True)
+    username: str = Field(unique=True, nullable=False)
+    email: str = Field(unique=True, nullable=False)
+    password_hash: str = Field(nullable=False)
diff --git a/backend/app/repositories/house_repository.py b/backend/app/repositories/house_repository.py
new file mode 100644
index 0000000..c9f6ee4
--- /dev/null
+++ b/backend/app/repositories/house_repository.py
@@ -0,0 +1,30 @@
+from sqlalchemy.orm import Session
+from app.models import House
+
+class HouseRepository:
+    def __init__(self, db: Session):
+        self.db = db
+
+    def get_all(self):
+        return self.db.query(House).all()
+
+    def get_by_id(self, house_id: int):
+        return self.db.query(House).filter(House.id == house_id).first()
+
+    def create(self, house: House):
+        self.db.add(house)
+        self.db.commit()
+        self.db.refresh(house)
+        return house
+
+    def update(self, house: House):
+        self.db.merge(house)
+        self.db.commit()
+        return house
+
+    def delete(self, house_id: int):
+        house = self.db.query(House).filter(House.id == house_id).first()
+        if house:
+            self.db.delete(house)
+            self.db.commit()
+        return house
diff --git a/backend/app/repositories/owner_repository.py b/backend/app/repositories/owner_repository.py
new file mode 100644
index 0000000..1f1628d
--- /dev/null
+++ b/backend/app/repositories/owner_repository.py
@@ -0,0 +1,37 @@
+
+from sqlalchemy.orm import Session
+from app.models.owner import Owner
+from app.schemas.owner import OwnerCreate, OwnerUpdate
+
+class OwnerRepository:
+    def __init__(self, db: Session):
+        self.db = db
+
+    def get(self, owner_id: int) -> Owner:
+        return self.db.query(Owner).filter(Owner.id == owner_id).first()
+
+    def get_all(self, skip: int = 0, limit: int = 100) -> list[Owner]:
+        return self.db.query(Owner).offset(skip).limit(limit).all()
+
+    def create(self, owner: OwnerCreate) -> Owner:
+        db_owner = Owner(**owner.dict())
+        self.db.add(db_owner)
+        self.db.commit()
+        self.db.refresh(db_owner)
+        return db_owner
+
+    def update(self, owner_id: int, owner: OwnerUpdate) -> Owner:
+        db_owner = self.get(owner_id)
+        if db_owner:
+            for key, value in owner.dict().items():
+                setattr(db_owner, key, value)
+            self.db.commit()
+            self.db.refresh(db_owner)
+        return db_owner
+
+    def delete(self, owner_id: int) -> Owner:
+        db_owner = self.get(owner_id)
+        if db_owner:
+            self.db.delete(db_owner)
+            self.db.commit()
+        return db_owner
\ No newline at end of file
diff --git a/backend/app/routers/get_houses.py b/backend/app/routers/get_houses.py
new file mode 100644
index 0000000..08b6295
--- /dev/null
+++ b/backend/app/routers/get_houses.py
@@ -0,0 +1,13 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from typing import List
+from .. import models, schemas, database, repositories
+
+router = APIRouter()
+
+
+@router.get("/houses", response_model=List[schemas.House])
+def list_houses(db: Session = Depends(database.get_db)):
+    houses = repositories.house.get_all_houses(db)
+    return houses
+
diff --git a/backend/app/routers/list_house.py b/backend/app/routers/list_house.py
new file mode 100644
index 0000000..bf807b8
--- /dev/null
+++ b/backend/app/routers/list_house.py
@@ -0,0 +1,14 @@
+from fastapi import APIRouter, HTTPException, Depends
+from typing import List
+from app.models import House  # Assuming you have a House model
+from app.dtos import HouseCreate  # Assuming you have a HouseCreate DTO
+from app.repositories.house_repository import HouseRepository  # Assuming you have a HouseRepository
+
+router = APIRouter()
+
+@router.post("/houses", response_model=House)
+async def create_house(house: HouseCreate, house_repo: HouseRepository = Depends()):
+    new_house = house_repo.create(house)
+    if not new_house:
+        raise HTTPException(status_code=400, detail="House creation failed")
+    return new_house
diff --git a/backend/app/services/ml_model.py b/backend/app/services/house_price_predictor.py
similarity index 100%
rename from backend/app/services/ml_model.py
rename to backend/app/services/house_price_predictor.py
diff --git a/backend/app/services/investor_predictor.py b/backend/app/services/investor_predictor.py
new file mode 100644
index 0000000..7ed40cf
--- /dev/null
+++ b/backend/app/services/investor_predictor.py
@@ -0,0 +1,5 @@
+import random
+
+class InvestorPredictor():
+    def is_investor(user: User) -> bool:
+        return random.random() < 0.5