Runtime home building system for Unity. Build, edit and decorate modular homes with rooms, walls, doors, windows, furniture, finishes, save/load and multi-storey support.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 bridgeINDEPENDENT CORE SYSTEMThe 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 structuresREQUIREMENTS• Unity 6 or newer• Unity Input System• Unity UIBUILD. 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.Technical detailsRuntime construction tools with mouse and keyboard controls.Grid-based placement for modular structures.Free positioning for furniture and stairs.Single, line, area and room placement modes in the Synty integration.Move, demolish and resize tools with placement validation.Doors and windows, floor and wall finishes.Multi-storey construction with wall and roof visibility controls.Stairwell openings in upper floors.Undo and redo for construction operations.JSON save/load and reusable construction templates.Editor tools for exporting templates as prefabs and .unitypackage files.Adjustable lot dimensions and construction camera.Standalone demo scene and PDF documentation included.Requires Unity Input System and Unity UI.Developed in Unity 6; the current project uses Unity 6000.6.0f1.Optional POLYGON Town integration scans locally installed assets and generates its catalog. No Synty art assets are included.The integration enables mesh Read/Write on floor models required for stairwell cutting.
