The house renovation in Croydon with house extension in London involves increasing the house’s floor area through a new extension attached to the main building and the construction of a separate guest house. The complete reconstruction of the residential house includes facade works, interior refurbishment, landscape design, and energy-efficient solutions. The architectural project in London was developed using 3D architectural design techniques with Autodesk Revit and BIM modeling, which eliminates errors at the design stage, enables precise calculation of structures, materials, and budget. 3D visualization provides the client with a complete understanding of the final result.