House renovation in the Sidcup area (DA14) with house extension in London involves increasing the floor area through a new extension attached to the main building. The full reconstruction of the residential house covers facade works, interior renovation, landscaping, and energy-efficient solutions. The architectural project was developed using 3D architectural design techniques with Autodesk Revit and BIM modeling, which eliminates errors during the design stage, enables precise calculation of structures, materials, and budget. 3D visualization ensures the client has a complete understanding of the final result.