Choose a flat area and clear a large space
Gather building materials like wood, stone, glass, and concrete
Lay out a large rectangular or custom mansion floor plan
Build a strong foundation and outline the walls
Add multiple floors with staircases connecting them
Create tall windows and large entryways
Build a grand front entrance with columns or arches
Add a roof using slabs, stairs, or layered designs
Divide the interior into rooms like bedrooms, kitchen, library, and storage
Decorate rooms with furniture, paintings, carpets, and lighting
Add balconies, terraces, or wraparound porches
Include a garden, fountain, driveway, or pool outside
Use different block textures to add detail and depth
Add hidden rooms, secret doors, or a basement
Light the mansion well to prevent mob spawning
Finish with landscaping around the mansion