MC BUILD PLANNERMinecraft building guide
Start with the widest ring. Build upward.
A dome roof is the upper half of a sphere. It works well for observatories, greenhouses, arena roofs, temples and underwater bases because each layer becomes smaller as it rises.
The base diameter determines the roof footprint, interior space and the size of every layer above it. Pick the dome size before you finish the surrounding walls. A mismatch between wall diameter and dome base is one of the hardest mistakes to fix later.
Good for well covers, small gazebos and compact turret caps.
Useful for greenhouses, observatories and single-room dome builds.
Better for arena roofs, grand halls and large server landmarks.
Use a clear material plan and confirm support points before filling the roof.
Generate the dome diameter, mark the centre and four anchors, then build the widest base ring exactly. Inspect the full circle from above before placing the next layer. This ring controls the symmetry of every layer above it.
Move the Build Layer slider one step at a time. Each new layer is a smaller circle or ring. Build the current layer, mark it complete, then continue upward. A dome plan is easier to follow than a full sphere because you only build the upper half.
For a roof, leave the lower side open and build only the dome layers above the wall. For a greenhouse or underwater build, choose a material such as glass and plan support rings where the design needs them. The structural footprint should be correct before decorative stairs, slabs or glass panes are added.
Use the generator’s total block count before gathering materials. A hollow dome normally costs far less than a filled hemisphere. If you use glass, consider whether the lower support ring needs stone, deepslate, quartz or another solid block to make the roof edge readable from outside.
Always start from the widest base ring unless the plan explicitly says otherwise. A smaller first ring makes the whole roof too narrow.
Confirm the outer wall diameter before building the dome. Thick walls reduce the usable interior, but the dome base still needs to match the outside structure.
Finish the basic layer structure first. Add panes, stairs, slabs, ribs and lighting only after the dome silhouette looks correct from a distance.
Use only the upper half of the sphere layers. The Dome Generator does this automatically so you do not need to decide which lower layers to remove.
A medium diameter gives enough interior space for crops and paths while keeping the roof manageable. Test the base ring against the planned wall and entrance before gathering glass.
Yes. The dome layers are manual block layouts and work in Java and Bedrock.
Generate a dome blueprint → · Use the Sphere Generator → · Read the Sphere Guide →