SimBuild: Home Builder

SimBuild: Home Builder is a flexible runtime building system designed for construction, simulation, city-building and sandbox games in Unity.

Create complete modular structures directly during gameplay using a grid-based construction system. Players can place floors, walls, rooms, doors, windows, stairs, roofs, furniture and finishes, then modify their creations with move, demolish, reshape, undo and redo tools.

The system includes validation and collision-aware placement to help prevent invalid constructions while keeping the building workflow intuitive and easy to expand.

Save and load player constructions at runtime, export layouts as portable JSON files, and create reusable Prefab Templates from the Unity Editor.

KEY FEATURES

• Runtime grid-based building system

• Floors, walls and complete room construction

• Doors and windows placement

• Multi-storey buildings

• Stairs and roofs

• Furniture placement

• Floor and wall finishes

• Move and demolish tools

• Room reshaping

• Collision-aware placement validation

• Undo and redo system

• Multiple wall visualization modes

• Runtime Save & Load

• JSON layout export

• Reusable Prefab Templates

• Customizable grid size, cell size and wall height

• Included standalone demo scene

• Optional POLYGON Town / Synty integration bridge

INDEPENDENT CORE SYSTEM

The core system works independently and does not require POLYGON Town or any other third-party art package.

An optional integration is included for users who already own POLYGON Town.

PERFECT FOR

• Building simulators

• House-building games

• City builders

• Survival games

• Tycoon games

• Sandbox games

• Simulation games

• Any project that needs player-created modular structures

REQUIREMENTS

• Unity 6 or newer

• Unity Input System

• Unity UI

BUILD. EDIT. SAVE. REUSE.

LowFrame Simulator Constructor gives you the foundation for adding a complete player-driven construction system to your Unity project without having to build the entire architecture from scratch.