Hammer: Complete Guide to Valheim's Most Essential Building Tool

Why the Hammer Is the Most Important Tool in Valheim

If you could keep only one tool, veterans would pick the Hammer. It builds your first shelter, places the Campfire that stops you freezing and the Workbench that unlocks everything else, and stays relevant from your first Meadows shack to stone fortresses in the Plains.

Three jobs

• Build every structure, from a Campfire to a full Portal network.
• Repair placed pieces for free.
• Demolish pieces for a full material refund, so misplaced walls cost nothing.

As the in-game description puts it: "With this in your hand, you can raise high halls and mighty fortifications."

How to Craft the Hammer

The Hammer is one of the few items that needs no crafting station. Build it from your inventory as soon as you pick up 3 Wood and 2 Stone; the recipe is available from the start. Punch a few Beech trees and grab loose Stone in the Meadows.

This is deliberate. Shelter is your first priority: without a roof you cannot rest, get the Rested bonus or stay safe from the elements and night creatures.

Upgrading Your Hammer

Hammer upgrades are among the cheapest in the game:

• Quality 2: 1 Wood and 1 Stone at a Level 2 Workbench.
• Quality 3: 2 Wood and 2 Stone at a Level 3 Workbench.

Each level adds 100 durability, so a Quality 3 Hammer lasts three times as long as a new one. Upgrade as soon as your Workbench allows: mid-project, you do not want to stop and repair every few minutes.

Reaching the Workbench levels

1. Level 2: place a Chopping Block nearby (10 Wood, 10 Flint).
2. Level 3: add a Tanning Rack (10 Wood, 15 Flint, 20 Leather Scraps, 5 Deer Hide).

Both are realistic within your first hour or two.

How to Use the Hammer: Controls and Build Menu

The game explains these poorly, so here is the full list:

• Right-click: open the build menu. Switch tabs (Crafting, Building, Furniture and more) with Q and E. New recipes appear as you discover materials and stations.
• Left-click: place the selected piece. The ghost preview is green when valid and red when blocked or unsupported.
• Middle mouse: demolish the piece you are looking at, with a 100% refund.
• Scroll wheel: rotate the piece before placing. Essential for roofs and angled walls.
• Hold Shift: temporarily disable snap points for free-form placement.
• Shift + middle mouse: copy the piece you are looking at, a huge time-saver many players miss for dozens of hours.

You cannot block

Right-click opens the menu, so you cannot block while holding the Hammer. Swap to a weapon and shield before engaging anything.

Repairing Structures with the Hammer

With the Hammer out and no build piece selected, left-click a structure to repair it. Repairs cost no resources at all, only Stamina: a wall at 1 HP goes back to full without a single Wood or Stone.

Station requirement

You must be within range of the station the piece needed when it was built: a Workbench for wood, a Stonecutter for stone, and so on.

Rain and raids

Wooden pieces without a roof or at least 70% cover slowly decay to 50% of their durability and look rotten. One click fixes them, but decay returns until you add a roof. After raids, a quick sweep restores damaged walls and gates for free.

Understanding Building Requirements

The Hammer can only place pieces within a crafting station's working radius. For most of the early game, a Workbench (10 Wood) is all you need. Its build radius is 20 meters, growing 4 meters per upgrade to 36 meters at Level 5.

Stations that unlock new pieces

• Forge (needs Copper): metal-reinforced pieces.
• Stonecutter (needs Iron): stone walls, arches, pillars and floors.
• Artisan Table (needs a Dragon Tear from Moder): later crafting stations.

Each must be in range when you place its pieces.

Structural Integrity: What the Color Codes Mean

Hover over placed pieces with the Hammer to see their stability:

• Blue: grounded on terrain, a boulder or a tree. Never collapses.
• Green: good stability with room to build.
• Yellow: stability getting low.
• Orange to red: at the limit. Anything attached to a fully red piece breaks and drops its materials.

Height limits

Standard Wood and Stone poles reach 16 meters vertically. Core Wood (Log) pieces reach 24 meters, and Wood Iron poles an impressive 50 meters.

Stone is not taller than Wood. Its advantages are rain immunity and higher HP, not reach; Iron-reinforced construction is the height king.

The Hammer and the Hoe

The Hoe (5 Wood + 2 Stone at a Workbench) is the Hammer's landscaping partner: it levels ground, raises terrain, makes paths and paves roads. Most projects start with the Hoe to flatten the site, then switch to the Hammer.

Skipping terraforming is a classic new-builder mistake. Uneven ground means gaps under walls, misaligned floors and pieces that refuse to snap.

Raising ground costs Stone

Unlike the Hammer's free demolish, the Hoe's Raise Ground costs 2 Stone per use and needs a Workbench nearby. A large foundation can eat hundreds of Stone, which is the grind that pushes many players toward Hammer Mode.

Hammer Mode: The Free-Build World Modifier

Hammer Mode is a world modifier that removes all material costs from building placement. It only affects the Hammer: weapons, armor, food and everything else still cost normal materials. You can toggle it freely in world settings with no permanent consequences.

Before it existed, players used console commands (devcommands) for the same effect. It is popular for big stone and decorative builds where gathering adds hours without adding gameplay.

Using it well

It shines for pure creative sessions where design matters more than survival. To keep the survival loop, use it selectively: some players allow one free-build session per biome conquered.

Suppressing Monster Spawns with Workbenches

Every Workbench creates a zone where hostile creatures cannot spawn. It needs no roof and does not even need to be visible: bury Workbenches in small pits under floor tiles or tuck them behind walls and they still work.

Spacing for full coverage

The suppression radius equals the build radius, 20 meters by default. Spacing Workbenches 40 meters apart leaves uncovered corners, so place them 28 meters apart for gap-free square coverage. It is a cheap way to secure a base perimeter or clear farmland: one Hammer and 10 Wood per Workbench.