Massing

ibuilder/massing

Open, self-hosted, IFC-native AEC platform. A genuine in-browser BIM authoring tool — model from scratch (blank or a template) and draw/drag-edit real IFC by GUID across architecture · structure · MEP, generate a permit-ready construction-document set (plans, sections, elevations, schedules → SVG/PDF/DXF, issuable ARCH-D sheets, a 3-part MasterFormat spec manual), pre-check code (IBC occupancy/egress, jurisdiction-adopted editions, an approvability pre-flight), and hand over field-verified as-built data (LOD-500 + manufacturer/serial, COBie-ready). Plus a near-100-module GC portal (RFIs, pay apps, CPM schedule, TRIR) and a development proforma — one model, from land acquisition through operations. Generate a building from a zoning envelope, or model it by hand; then coordinate, schedule, underwrite & operate it. Built on That Open + IfcOpenShell. $0 to run.