UE Builder - Architectural Modeling Tools for Unreal Engine

Documentation | Overview Video |

Features

• Wall Tool — Click two points to instantly create walls. Adjacent walls automatically miter at corners for clean joints. Fully adjustable height, thickness, and material.

• Floor Tool — Define boundary vertices with clicks, double-click to finish. Generates a procedural floor mesh at your specified height.

• Stair Tool — Click a start and end point to generate stairs. Customize step count, width, height, and slope in the details panel.

• Ramp Tool — Same click-and-drag workflow as stairs, but generates adjustable ramps for accessibility or terrain transitions.

• Select & Edit — Click any building element to select it. Drag endpoint anchors to resize or reposition. Anchors auto-snap to nearby endpoints for precision. Full Undo/Redo support.

• Door Openings — Enable Door Mode in the Select tool to cut openings directly into walls. Adjust width, height, and Z-offset. Delete openings without affecting the wall.

• Reference Image Overlay — Import a floor plan or reference image as an editor overlay, then trace walls and geometry directly on top.

• Model Library & Place Tool — Import and manage custom Static Mesh assets with thumbnail browsing, drag-and-drop from Content Browser into categorized groups, and rename groups/models. Left-click in viewport to place models with green ghost preview, mouse wheel to rotate, right-click to cancel placement. Drag models between groups for organization.

Key Details

- Source Code Plugin — compiles automatically on first launch, no pre-built binaries needed

- Compatible with UE 5.5, 5.6, and 5.7 — separate packages provided for each version

- Minimal Dependencies — only requires the built-in ProceduralMeshComponent plugin

- Procedural Geometry — all meshes are generated at runtime, no static mesh assets required

- Lightweight — clean C++ codebase under 250 KB

Use Cases

- Architectural Visualization — quickly block out building layouts for archviz projects

- Level Design Prototyping — rough out interior spaces and building structures before committing to modular assets

- Game Development — create buildings, walls, and environments with precise control

- Student & Portfolio Projects — fast iteration on architectural concepts in UE

Version Compatibility

UE 5.7

Important Notes

- Project path must not contain non-ASCII characters (Chinese, Japanese, etc.) to avoid compilation issues

- This is a source code plugin — it compiles in your project automatically

- Requires the ProceduralMeshComponent plugin (enabled by default in all UE versions)