A hobbit hole is a dome of earth with a round door in its face, and the dome is the part to plan: its width decides how much of the floor has room to stand on, because the ceiling comes down to meet the floor at the edges.
TL;DR: A 17-wide hobbit hole is a hollow dome of 405 blocks, 9 tall, over 177 blocks of floor. 169 of those floor blocks have at least two blocks of headroom, enough to walk on. Carved into a hill instead of built on flat ground, the same room means digging out 984 blocks. The round door is a 5-wide circle, 21 blocks of opening inside a 16-block frame.
Table of contents
Open Table of contents
Pick the dome by the floor you want
The mound is the top half of a sphere, so its height is half its width, rounded up, and the space under it shrinks toward the edges. The numbers that matter are how much floor there is and how much of it you can stand on.
All of them come from the dome generator set to Hollow. MC Shapes is a free, browser-based set of Minecraft shape generators (circle, oval, sphere and dome) that outputs block-by-block blueprints with exact block counts; it does not export schematic files.
| Width | Dome blocks | Height | Floor | Floor with 2+ headroom | Floor with 3+ headroom |
|---|---|---|---|---|---|
| 13 | 245 | 7 | 97 | 89 | 69 |
| 15 | 321 | 8 | 137 | 121 | 101 |
| 17 | 405 | 9 | 177 | 169 | 145 |
| 21 | 653 | 11 | 293 | 277 | 253 |
| 25 | 941 | 13 | 421 | 405 | 385 |
The 17-wide hobbit hole is the middle of the table: 405 blocks of dome, 9 tall, with 177 blocks of floor, 169 of them walkable. Drop to 13 wide and the dome is 245 blocks with 89 walkable, about one room; at 21 wide it is 653 blocks over 277 walkable, room for a kitchen, a bedroom and a hall.
“Walkable” here means two blocks of air above the floor, the height a player needs. The outermost ring of floor under every dome is too low to walk on, so put chests, barrels and beds there, against the curve.
Build it on the ground or dig it into a hill
On flat ground you build the dome as a shell, ring by ring, then cover it: grass blocks on the outside, and dirt or wood panelling on the inside. That is the 405 blocks above for a 17-wide hole.
Dug into a hill, the work runs the other way. You remove what would have been inside the dome: 984 blocks for a 17-wide room, the difference between the generator’s Solid and Hollow totals. The hill stays as the shell, so you place almost nothing but the floor and the door, and you dig for longer.
Either way, the front of a hobbit hole is flat. Cut the dome straight down one side and set the door in that face.
The round door
Vanilla Minecraft has no round door: a door is a normal one, two blocks tall, set into a circular opening. The opening has to be big enough to look round. A circle 3 wide is a 3 × 3 square, every block filled, because the corners are too close to the middle to be left out. The smallest opening that reads as round is 5 wide: 21 blocks, the 5 × 5 square with its four corners left out.
Frame it with the ring one size up: a 7-wide hollow circle is 16 blocks and fits exactly around the 5-wide opening. Put two doors side by side in the middle of the opening, two blocks wide and two tall, and fill the rest of the circle with planks or trapdoors so the outline stays round.
Round windows work the same way. A 5-wide one costs 21 blocks of glass, so most hobbit holes use one or two, and the rest of the light comes from lanterns.
More than one room
A larger hobbit hole is several small domes, not one big one. A 9-wide dome is 121 blocks and 5 tall, the size of a pantry or a bedroom. Join each to the main room with a short tunnel; a tunnel with a round roof is the same shape as an arch over a 3-wide opening, 7 blocks for every block of its length.
Keep the side rooms on the same floor level as the main dome, and lay them out from the main dome’s centre so the tunnels come off it straight. The igloo build is the same plan with snow: one dome, one tunnel, and the counts for each.
What stays hand work
The generators draw the dome, the door opening and the frame as full blocks. The flat front face, the soil and grass on top, the chimney poking through, the garden and the path to the door are yours to place.
A grassy mound looks smoother with slabs and stairs along its steps; the blueprint does not draw those, and the counts above do not include them.
A 17-wide hobbit hole is 405 blocks of dome and a 21-block round door. The dome generator gives any other width with its height and every ring on screen, and the circle generator draws the door and the windows.