DragNBuild

DragNBuild is a Valheim building mod that lets you place multiple pieces at once by holding the place button and dragging. Stop placing walls one by one — just drag and build.

How It Works

1. Enter build mode and select a supported piece.
2. Hold the place button (left mouse button / Attack) at the target location.
3. Drag your mouse in any supported direction — ghost copies of the piece appear in a line or grid previewing where they'll land.
4. Release the button to place all pieces at once (resources are consumed automatically).
5. Press Block at any time to cancel the drag without placing anything.

Scroll wheel while dragging adjusts the spacing between pieces (up to +2.5 units extra gap).

Hold Left Alt while dragging to snap each X/Z column to terrain height while preserving stacked Y levels (upper floors stay above the snapped base).

Manual Placement (with nocost)

When nocost is enabled, you can manually grow/shrink the preview while dragging:

Visual Feedback

Ghost pieces are color-coded in real time:

• 🔵 Blue — you have enough resources to place all previewed pieces.
• 🔴 Red — not enough resources; releasing will not place anything.

Supported Directions

Each piece can support any combination of these drag axes:

Pieces can be dragged in 3D (e.g., a wall supports UpDown + LeftRight, letting you fill a rectangle in one drag).

Configuration

Config files live in BepInEx/config/DragNBuild/.

On first launch, VanillaPieces.yml is automatically created there with all vanilla pieces pre-configured. You can edit it freely or add new .yml / .yaml files for modded pieces — changes are hot-reloaded instantly without restarting the game.

YAML Format

# Single piece entry
woodwall:
  Directions: UpDown, LeftRight

# Piece with manual dimensions (overrides auto-detection from snap points)
wood_fence:
  Directions: LeftRight
  Dimensions:
    X: 2.5
    Y: 0
    Z: 0
    BottomOffset: 0

# Angled piece with height offset per step
wood_beam_45:
  Directions: LeftRight
  Dimensions:
    X: 2
    Y: 0
    Z: 0
  AddedLRHeight: 2    # rise per step when dragging Left/Right
  AddedFBHeight: 0    # rise per step when dragging Forward/Backward

Fields

Vanilla Pieces Support

The mod ships with VanillaPieces.yml covering all vanilla build pieces across every biome tier:

• Wood — walls, floors, beams, poles, roofs, stairs, doors
• Darkwood — beams, poles, roofs, decorative walls
• Ashwood (Ashlands) — walls, floors, beams, roofs, stairs
• Stone — walls, floors, stairs, pillars, arches
• Black Marble (Mistlands) — walls, floors, columns, stairs
• Grausten (Ashlands) — walls, floors, pillars, beams, roofs
• Iron / Reinforced — poles, beams, iron grates, crystal walls, flametal
• Defenses — fences, stake walls, dvergr stakes, ashlands spikes
• Chests & Storage — chests, barrels, resource piles, wood/stone stacks
• Utility — hearths, portals, turrets, training dummies
• Farmables — all crop saplings and trees

Multiplayer

Config is synced from server to all clients via ServerSync. The server's YAML files are authoritative — clients use server values automatically on join.

Installation

1. Install BepInExPack for Valheim.
2. Drop DragNBuild.dll into BepInEx/plugins/.
3. Launch the game — VanillaPieces.yml is created automatically on first run.

Adding Custom / Modded Pieces

Create any .yml file in BepInEx/config/DragNBuild/ and add entries using the piece's prefab name (the internal game name, not the display name):

my_modded_wall:
  Directions: UpDown, LeftRight

my_modded_beam:
  Directions: LeftRight, ForwardBackward
  AddedFBHeight: 1

Files are reloaded on save — no restart needed.