Hi, Don't be chaeted with the cost. Make sure contractor do proper job as many of them short cut and your hse will be in big trouble future. My total renovation cost me RM 53K excluding paints, tilling, Doors and Window. I'm extending my Kichen area 18ft X 7ft With concrete roof + Remodeling Front Porch + Remodeling 3 bathrooms and Floor tilling. You need experience/ honest contractor that will tell you what grade cement and formulate they used. BRC, Bricks,Metal rod Y.., Footing how deep and how are they going to connect existing wall to new extended kitchen. If you notice many exended kicthen wall start to crack and some even sag.