How to Build a Lighthouse in Minecraft

A Minecraft lighthouse is a stack of circles: a wide base, a tall round tower, a deck with a railing near the top, a small glass lantern room with a light inside, and a roof. This guide gives you one complete plan with every size and block count worked out. The tower is 11 blocks across and 28 blocks tall, the whole build is about 40 blocks high, and it takes roughly 1,740 blocks.

The sizes below come from this site's generators, so you can open any part in a tool, see the grid layer by layer and change the size if you want a bigger or smaller lighthouse. The rest of the guide covers making the light come on by itself at night, and adding a beacon beam that actually reaches the sky.

The plan at a glance

Every part is centred on the same block, so use odd diameters throughout. An odd circle has a single centre block, which keeps the tower, the staircase pillar, the lantern room and a beacon all lined up. (The even vs odd guide explains the difference.)

Windows, a doorway and the opening for the stairs remove a few blocks from these totals, so the counts are a little high, which is the safe side when you are gathering materials. The stack calculator converts any of these numbers into stacks and shulker boxes.

Step 1: Pick a spot and lay the base

Lighthouses look right on a rocky point or at the end of a pier, with water on at least two sides. Mark the centre block first, then build a filled circle 17 blocks across from stone bricks, cobblestone or deepslate. That is 225 blocks per layer; two layers (450 blocks) give the tower a solid footing and a ledge to walk around.

Enter 17 in the circle generator, choose Filled, and you get the row lengths to build from. Tick Build checklist on a phone or second screen and tap blocks off as you place them.

Step 2: Raise the tower

The tower is a ring 11 blocks across, one block thick, centred on the same block as the base. Each layer is 28 blocks, and 28 layers make 784 blocks. The round tower generator shows the ring and the totals for any diameter, height and wall thickness, so you can make it taller or thicker before you start.

For the classic red-and-white look, change colour every 4 layers. Starting and ending with white gives seven bands: four white (448 blocks) and three red (336 blocks). Concrete gives the cleanest colours; terracotta or wool also work if you have no concrete yet.

Add windows as you go: replace a wall block with glass or a glass pane every 6 to 8 layers, on alternating sides, so the staircase inside gets some light. Put a door in the first layer above the base.

Step 3: Put a staircase inside

An 11-block ring leaves a space 9 blocks wide in the middle, which fits a spiral staircase with a radius of 3 (7 blocks across). With 28 steps and 16 steps per full turn, the stairs make 1.75 turns and climb the whole tower: 91 step blocks plus a 28-block pillar in the centre. The spiral staircase generator gives the plan and shows where each step goes.

If you would rather save materials, a ladder up the inside wall needs only 28 ladders, but the staircase is what makes a lighthouse feel finished inside.

Step 4: Build the gallery deck and railing

On top of the tower, build a filled circle 15 blocks across (177 blocks). It overhangs the tower by 2 blocks on every side, which gives you a walkway. Before you fill it in, check where the top step of the staircase ends and leave a 1 × 2 opening above it so you can climb through. Then run a railing of fences or walls around the edge: an outline circle 15 across, 40 blocks.

Step 5: Build the lantern room

The lantern room is a glass ring 7 blocks across, standing in the middle of the deck. Each layer is 16 blocks, and 4 layers make 64 glass blocks or panes. Leave one glass block out of the bottom two layers as a doorway onto the deck. Inside, the room is 5 blocks wide, with room for the light and, if you want one, a beacon.

Iron bars or a few blocks of a darker material at the corners make the room look framed, but keep most of the ring glass so the light can be seen.

Step 6: Choose the light

Several blocks give the maximum light level of 15, so brightness is the same for all of these. Choose by how they look, what you can get, and whether you plan to add a beacon.

Sources: light levels from the Minecraft Wiki pages for the sea lantern, glowstone, lantern, froglight and redstone lamp.

Light drops by one level for each block it travels, so a level-15 block in the middle of the lantern room lights up the deck too. For a simple always-on light, stand a sea lantern or glowstone on a short pillar in the centre of the room, or hang four lanterns from the ceiling.

Step 7: Put the roof on

A hollow dome 9 blocks across sits on top of the lantern room and overhangs it by one block, like the cap on a real lighthouse. It is 5 layers tall and takes 105 blocks. The dome generator shows each layer; dark oak, deepslate tiles or copper all make good roofs. For a pointed roof, use the cone generator instead.

If you want a beacon beam, build this dome from glass rather than solid blocks. The next sections explain why.

Make the light come on at night

A redstone lamp gives light only while it is powered, and a daylight detector can power it when it gets dark. Crafted from glass, nether quartz and wooden slabs, a daylight detector normally gives a signal during the day. Use it (right-click, or tap on mobile) and it switches to inverted mode, which gives a signal at night instead, according to the Minecraft Wiki's daylight detector page.

The neat way to fit this into the lighthouse:

1. Replace the centre block of the dome's top layer with a redstone lamp.
2. Place a daylight detector directly on top of that lamp and use it once to invert it.
3. At dusk the lamp turns on, lighting the lantern room from above; at dawn it turns off.

The detector must have open sky above it. If it is covered, an inverted detector gives a full signal all day, so the lamp never turns off. On a clear night it gives a signal of 11, which is plenty to light a lamp that it touches. In Bedrock Edition, inverted detectors give no signal in the Nether or the End, so this only works in the Overworld.

Add a beacon beam

A beacon's beam makes the lighthouse visible from far away. It needs three things, all from the Minecraft Wiki's beacon page:

• A pyramid under it. The smallest is a 3 × 3 square of 9 blocks of iron, gold, emerald, diamond or netherite (you can mix them). It fits in the 5-block-wide lantern room with space to walk around it. Larger pyramids need a 5 × 5 base or wider, which will not fit in a 7-block room; the beacon pyramid calculator shows the block count for each level.
• A beacon block on the centre of the pyramid, crafted from glass, a nether star and obsidian.
• A clear path to the sky. The beam passes through glass and other see-through blocks but stops at any solid block. That is why the roof has to be glass if you want the beam. Glowstone and sea lanterns also block it, so do not put them above the beacon.

Stained glass above the beacon tints the beam, so a glass dome with a red stained-glass top block gives a red beam. The beacon itself gives light level 15, so it doubles as the lighthouse's light. In Java Edition the beam can be seen from any loaded chunk, up to 512 blocks away; in Bedrock Edition up to 2048 blocks.

Choose one top for the roof: a glass dome for the beacon, or a solid dome with the redstone lamp and daylight detector at its peak. The lamp is a solid block, so it would block the beam.

Variations

• Bigger lighthouse: a tower 15 across with walls 2 blocks thick and 32 layers tall takes 2,560 blocks for the tower alone. Scale the deck to 19 and the lantern room to 9 to keep the proportions.
• Medieval lighthouse: use stone bricks and cobblestone instead of stripes, a square base, and a lantern room with open arches and a fire on top. A campfire or a block of netherrack with fire on it makes a good beacon fire.
• Survival on a budget: make the tower from one material, use a ladder instead of the staircase, and light it with lanterns, which need only iron nuggets and a torch.

Common questions

How tall should a Minecraft lighthouse be?

Tall enough to stand clear of the trees and terrain around it. The plan here is about 40 blocks high including the base and roof. As a rule of thumb, make the tower at least two and a half times as tall as it is wide, or it starts to look like a silo.

Can I make the light turn like a real lighthouse?

Not with a single block. Builders imitate a sweeping light with a ring of redstone lamps switched on one after another by a redstone clock. That needs a separate redstone build and is beyond this guide.

Do I need to light the inside?

Yes, if you play in survival. In the Overworld, hostile mobs spawn only where the block light level is 0 (since version 1.18), so a few lanterns on the staircase keep the tower safe.