The structure and waterproofing are typically where the biggest portion of the budget goes in a house extension. This includes footings, framing, roofing, and ensuring the new addition is properly tied into the existing building.
After that, wet areas such as kitchens and bathrooms are among the most costly spaces to build out due to plumbing, tiling, and the number of trades involved.
Windows and external doors can also represent a significant cost, particularly if you are going with larger glazed sections or bifold doors. Finishes like flooring, joinery, and fixtures can vary widely depending on the products chosen.
Understanding where money is best spent and where savings can be made without compromising quality is something Mitroteam Projects can help you work through.