Valheim Base Build Planner

Your bases are kept in this browser and go into the JSON backup under Your copy with everything else. The planner makes no network request beyond loading the game's pieces.

Where the numbers come from

Every piece, its cost, the station it is built at, its comfort and comfort group, its material, whether it carries support and whether rain wears it come from game-db, which reads them from the game's own files (Valheim build 25390630). So do the support limits of each material. Walls, floors, beams, poles and roofs are sized by their snap points, which is the grid they occupy when snapped in game. Furniture and stations are sized by their collision box, and pieces with a rounder shape (a round table, a chest, a portal) by the box that holds their shape, the room they take. The few with none are drawn as one-metre markers and labelled; their cost and comfort are still exact.

Each crafting station's reach, its extra reach per upgrade and whether it needs a roof, how close an upgrade must stand, how far a fire's warmth reaches and whether it makes smoke come from the game files too. Where a piece has no value for one of them, the planner uses the Valheim wiki's 20 m station reach or a 10 m warmth and says so wherever it does.

Support

Pieces on the ground hold their material's full support. Every other piece takes the best support it can get from what it touches, less a loss for the distance from that piece: a little when the support is straight below, more when it is beside. Held from two opposite sides, the two are averaged. Below its material's minimum a piece breaks, and so does whatever it was holding up. Worked this way, a column of poles stands as tall as the Valheim wiki says it does in game: 16 m of wood or stone, 24 m of core wood, 50 m of wood-iron. Colour by support uses the hammer's own colours: blue at full support, then green, yellow and red as it weakens.

The planner judges contact from each piece's box, and the game from its real shape, so a sloped roof or an odd-shaped piece can touch a little more here than it does in game. Treat a weak or critical piece as the place to add a pole, and check a tall build with the hammer before you rely on it.

Ground

Press Shape the ground, then raise, lower or flatten it in 2 m squares, by pointer or with the arrow keys and + and −. A piece resting on the ground anywhere under it is grounded and holds full support, so a base on a slope or a hillside can be planned as it will stand.

Shelter, comfort and rest

As the Valheim wiki gives it: comfort starts at 1; in shelter it gains 1 more, plus the comfort of each piece of furniture within 10 m, counting only the best piece of each comfort group. Resting needs shelter and a fire's warmth. Rested lasts 8 minutes plus 1 for every level above 1. Shelter is judged the way the game samples it: rays from head height straight up and all round, so a roof with open sides or a missing wall can fail where a floor overhead alone would seem enough.

A fire under a roof with no gap above it fills the room with smoke, and a piece that rain wears down shows when it is open to the sky; colour by Rain to see which. Stations that need a roof say when they have none, and a piece built out of its station's reach is listed.

Building it in game

Shift and click, or Shift and drag across the plan, selects several pieces; Ctrl+A selects the whole storey. Move, turn, duplicate or copy a selection up a storey together. Enter what you already have under In hand and the bill shows only what is still to gather; it is kept with the base.

Reviewed 2026-10-06.