--- title: "BIM Harness | The AI editor that designs a whole building as a BIM model" description: "Describe a building in your own words and the AI builds a real BIM model — structure, rooms, roof, ventilation and electrics as IFC entities, coordinated and clash-checked. It opens your own IFC too, writes properties to the data standard and exports drawings to PDF." url: https://buildify.cz/bim-harness source: https://buildify.cz/bim-harness.en.md language: en publisher: Buildify (Buildify Digital s.r.o.) dateModified: 2026-08-27 keywords: ["AI BIM editor", "BIM model generation", "text to IFC", "AI building design", "online IFC editor", "generative building design", "BIM model from a description", "AI architecture", "AI MEP design", "generated building services", "clash detection", "parametric kernel", "IFC import", "building data standard", "IDS validation", "4D construction schedule", "quantity take-off", "QTO from a BIM model", "MS Project export", "Buildify BIM Harness"] license: "Volně citovatelné s uvedením zdroje / freely quotable with attribution" --- # BIM Harness | The AI editor that designs a whole building as a BIM model Describe a building in your own words and the AI builds a real BIM model — structure, rooms, roof, ventilation and electrics as IFC entities, coordinated and clash-checked. It opens your own IFC too, writes properties to the data standard and exports drawings to PDF. ## Quick facts - **Product** — Buildify BIM Harness - **Vendor** — Buildify Digital s.r.o. (Buildify) - **Category** — AI building design / text-to-BIM (IFC) - **Price from** — 20 € / month - **Deployment** — SaaS, Google Cloud (EU, europe-west3) - **Languages** — Czech, Slovak, English, German - **Page** — https://buildify.cz/bim-harness - **Minutes** — from brief to a building with its services - **30 roles** — of AI specialists over one model - **194 ms** — to rebuild a hospital of 1,896 elements - **100 % IFC** — real entities with parameters, not pixels BIM Harness turns a written brief into a real BIM model — storeys, structure, rooms, roof, ventilation and electrical installations. Not a picture. IFC you keep working with. - Text → IFC with MEP and electrics - Our own parametric kernel - Clashes checked while generating - Open IFC in and out ## An AI that doesn’t draw pictures. It builds models. There are hundreds of image generators. BIM Harness is the only tool we know of that returns a complete, still-editable BIM model from a description. ### Image AI - Returns pixels — a pretty visual with no geometry - No storeys, walls or rooms you can work with - Every change means regenerating and hoping - Moving the output into a project starts from zero, by hand ### BIM Harness - Returns an IFC model — storeys, structure, openings, spaces, roof and services - Every element is a real entity with parameters, a type and a material - Refine it by dragging in the editor, or with the next sentence to the AI - Export to open IFC — Revit, Archicad and your CDE pick it up The output isn’t inspiration. It’s a project in progress. ## Our own kernel, not a layer on someone else’s CAD Most AI tools for architecture are plugins for Rhino or Revit — and they inherit both their ceiling and their licence. BIM Harness stands on a parametric kernel we wrote from scratch. That is precisely why it can do what a wrapper cannot reach. The kernel is a parametric model in the browser — not IFC in memory, and not fragments. Move a wall and only what hangs on it regenerates; that is why an edit is instant and a hospital of 1,896 elements rebuilds in 194 ms. Fragments only draw the same geometry on the GPU. IFC is the entrance and the exit. - **A parametric object model** — A wall knows it is a wall: it has a build-up, mitred corners, openings as a relation and a dependency graph. Change the type and the model regenerates — no rewriting lines in a file and hoping. - **Grids, families, types and formulas** — Structural grids, columns on intersections, datum elements, families with parameters and unit-checked formulas. Exactly the layer desktop BIM tools stand on — in the browser, without a five-figure licence. - **Views, drawings and schedules** — Plans and sections are generated from the geometry, annotations belong to the view, and schedules work both ways: overwrite a number in the table and the model changes. - **IFC is the boundary, not the internals** — The model does not live as STEP lines in memory. IFC is imported at the entrance and generated deterministically at the exit — which is why the export never collapses into triangle soup. - **302** — automated tests on the kernel alone - **14.8×** — faster model rebuilds after moving to the kernel - **0** — dependencies on third-party licences A wrapper over someone else’s API takes a month to build. This is a year of work on geometry, constraints and regeneration — and it is the reason a sentence turns into a building rather than a cloud of triangles. ## How it works - **Describe the building** — In your own words: “Apartment building, four storeys, twelve flats, gable roof, basement storage.” The more detail, the more precise the design. - **A team of AI takes it apart** — The brief is not handled by one prompt. It is split between roles — architect, structure, HVAC, plumbing, electrical, fire — and each writes into its own module. - **The model gets checked** — Before you see the design it passes a completeness and clash check. Whatever crosses gets rerouted; whatever is missing is filled in deterministically. - **Refine and export** — Move walls, swap windows, add equipment — by dragging or with the next sentence. Then IFC into Revit, Archicad or your CDE. ## Not a shell. A building with services in it. Massing generators stop at the envelope and the layout. Harness carries on where a designer’s real work starts — services, penetrations and coordination. - **Architecture and layout** — Storeys, rooms by typology, the circulation core, open-plan relations, atria and set-back storeys with a terrace and parapet. - **Structure and roofs** — Columns on grid intersections, beams, gable, hipped, half-hipped, mansard and pavilion roofs — over L, U and T footprints, with per-wing ridges and valleys. - **Ventilation, plumbing and heating** — Mains in the ceiling void with height bands set by the rooms they cross, shafts at the end of corridors, risers, and penetrations cut into the structure. - **Electrics down to the circuits** — Service connection, meter, a switchroom as an actual room, boards per floor, feeders sized for the floor load, circuits, emergency lighting, UPS and a generator. - **Data and low-voltage** — A data board and a data riser routed at a distance from the power riser, with a fire alarm panel chosen by building type. - **Clash detection that doesn’t lie** — Clashes are measured analytically — distance between route axes minus radii, containment of a centreline in a solid. No boolean intersection reporting 4,000 litres for two pipes a metre apart. After the check and the generator were rewritten, clash counts on the benchmark buildings dropped from 587 to 28 on the bungalow and from 2,898 to 113 on the four-star hotel. What remains are services crossing each other — exactly what gets settled in a coordination meeting. And a self-play harness keeps stress-testing the whole chain on dozens of generated briefs. ## So it doesn’t look like a box with windows Generative design has a reputation for grey blocks. That is why Harness has its own ornamental architecture layer — and it builds real geometry, not a texture on the façade. - **Ornament as geometry** — Cornices, window surrounds, corner rustication, pilasters, columns, balustrades, arches, gables and dentils. Shaped profiles swept along the perimeter that break at openings and regenerate when you edit. - **State the style in words** — “A neoclassical villa.” “A Mediterranean guesthouse.” The AI picks the style and the level of ornament, the engine builds it deterministically — so the same brief returns the same house, not a fresh roll of the dice. - **Realistic mode is the default** — Procedural textures for roof tiles, render, sandstone, timber and stainless steel, a sky with a sun, soft shadows and filmic tone mapping. The model looks like a building right in the editor, not an hour later in a render tool. ## Your project in. Your format out. Harness is not a walled garden. It opens IFC from Revit and Civil 3D, writes properties to the Czech building data standard and hands you drawings as PDF. - **IFC import with no silent loss** — Every entity type in the schema has a declared fate and every element shows up in the import report. Across real-world exports from Revit 2021–2024 to Civil 3D — IFC2X3, IFC4 and IFC4X3, alignments included — measured import coverage is 1.0. What doesn’t import, you know about; nothing vanishes without a trace. - **Building data standard** — Properties are written as typed IFC values, the model validates against IDS, and the vocabulary of the Czech data standard (ČAS) loads straight from the public API. CCI classification lives in the project as maintained data, not as a note. - **Drawings, PDF and exchanges** — Plans and sections are generated from the model geometry and exported to PDF — dimensions, annotations and full diacritics included. The schedule exchanges with MS Project, the take-off with Excel. - **1.0** — import coverage on real-world exports - **746** — IFC4 types with a declared fate - **373 ms** — to open a 35 MB IFC file Test corpus: 57 real files from 0.1 MB to 2.5 GB — Revit 2020–2026, Civil 3D, Bentley. ## Key features - **AI design of a whole building** — A written description becomes a complete model: layout, structure, openings, roof, façade rhythm and services. - **A team of 30 AI specialists** — It is not one prompt working on the model. A registry of 30 roles — from structure and HVAC to fire — each writing into its own module while an architect holds the whole. - **Iterate with the next sentence** — “Add a storey.” “Enlarge the south-facing windows.” The AI updates the model, versions sit side by side — and a built-in prompt advisor helps you write a better brief. - **An editor like professional CAD** — A ribbon with contextual tabs, two-key accelerators, an options bar at the point of drawing, smart snapping and precise dimensions. In the browser, nothing to install. - **Ornamental architecture** — Cornices, pilasters, balustrades, rustication and premium textures — from the palette or with a single sentence to the AI. - **IFC import** — Open your own project from Revit or Civil 3D. Every entity has a declared fate and the import ends with a report, not with silent data loss. - **Data standard and classification** — Typed IFC properties, IDS validation, the vocabulary of the Czech data standard (ČAS) and CCI classification right in the model. - **Drawings and PDF** — Plans and sections generated from the model, annotations and dimensions that belong to the view, PDF export with full diacritics. - **Construction scheduling (4D)** — Activities bound to model elements, dependencies, critical path, calendars, resources and baselines. A Gantt inside the editor and a two-way MS Project exchange. - **Quantity take-off (QTO)** — Volumes, areas and counts measured from the kernel geometry — by material, class and storey. Recalculated live as you edit, exported to XLSX and CSV. - **Scripting API** — Batch edits by script — the same API the AI agent builds the model with. Whatever it can do, so can you. - **Open IFC and CDE** — Export any time, with no locks. Share, version and review the model in the Conexium CDE. ## Who it is for - Architects and engineers - Developers and investors - Design & build firms - Schools and research ## Pricing Monthly packages with credits. 100 credits ≈ 2 million tokens ≈ 5 building designs. | Plan | Price | Includes | | --- | --- | --- | | Trial | 20 € / month | For anyone who wants to try it out first Full editor and IFC export; AI designs and iterations on the model; Realistic materials and an equipment catalog; E-mail support | | Start | 200 € / user / month | For individuals and first projects Full editor and IFC export; AI designs and iterations on the model; Realistic materials and an equipment catalog; E-mail support | | Studio | 500 € / month | For practices that design every week Everything in Start; Project sharing across the team; Priority support; Scripting API | | Max | 1.000 € / month | For studios running non-stop Everything in Studio; Discounted credits: 100 for 80 €; Onboarding with our team; Early access to new features | Out of credits? Top up any time. Credits track actual AI usage — you pay for what you use, just like API pricing. When the monthly allowance runs out, buy more by the hundred and keep working. All tiers except Max: 200 € per 100 credits; On the Max package: 80 € per 100 credits. ## FAQ ### What is a credit and what does it get spent on? 100 credits correspond to roughly 2 million tokens of AI work — about 5 complete building designs. Credits are spent on generation and AI edits; manual work in the editor is unlimited and free. ### Is the output really a BIM model, not just a picture? Yes. The output is IFC: storeys, walls, openings, spaces, roofs and materials as real entities with parameters. Open it in Revit, Archicad or any viewer. ### Does the AI design the services too, or only massing and layout? The services too. Ventilation, plumbing and heating run through ceiling voids and shafts in height bands, and penetrations are cut into the structure. Electrics run from the service connection and meter through the switchroom, boards and feeders down to individual circuits, emergency lighting and standby power; low-voltage gets its own riser at a distance. ### How do you know the model isn’t full of clashes? The check runs as part of generation rather than after it — and it measures analytically: distance between route axes minus radii, containment of a centreline in a solid. We threw out the boolean intersection that reported thousands of litres for two pipes a metre apart. On the benchmark buildings that cut clashes from 587 to 28 on the bungalow and from 2,898 to 113 on the hotel; what remains are services crossing each other, exactly what a designer settles in a coordination meeting. And a self-play run keeps generating dozens of fresh briefs and guards against the quality slipping back. ### Can I bring my own IFC project into the editor? Yes. The import declares a fate for every entity type in the schema — across real-world exports from Revit 2021–2024 to Civil 3D (IFC2X3, IFC4 and IFC4X3, alignments included) measured coverage is 1.0, and the report tells you what happened to every element. A 35 MB file opens in hundreds of milliseconds. ### Does it support the Czech building data standard? Yes. Properties are written as typed IFC values, the model validates against IDS, and the ČAS data standard vocabulary is loaded straight from the agency’s public API. CCI classification is part of the project as maintained data. ### Why can’t a Revit or Rhino plugin do this? Because underneath Harness sits our own parametric kernel — an object model with constraints, families, types and regeneration, where IFC is only the system boundary. A layer on someone else’s CAD API inherits its data model, its licence and its ceiling; we inherit none of that, and we can rebuild the whole model in under a fifth of a second. ### Can I edit the model after it is generated? Yes, in two ways: by hand in the editor — dragging, tools, the equipment catalog — or with another instruction to the AI, which edits the model for you. ### What if I run out of credits during the month? Buy more by the hundred: 100 credits for 200 € on every tier except Max, or 80 € on Max. Manual work in the editor is never blocked. ### Do I need to install anything? No. The whole editor, AI included, runs in the browser — all you need is a link and an account. ### Who owns the model I create? You do. Export the IFC at any time, with no locks and no dependency on us. ### Does Harness also do scheduling and quantity take-off? Yes — both are shipped and fully automatic. The model produces a construction programme: activities bound to specific elements, dependencies, a critical path, calendars with public holidays, resources and baselines, with a two-way MS Project exchange. Alongside it runs the quantity take-off: volumes, areas and counts measured straight from the geometry by material, class and storey, recalculated live on every edit and exported to XLSX or CSV. What takes a planner and an estimator days today falls out of the model on its own. ### What makes BIM Harness unique? We know of no other tool in the world that builds a complete, still-editable IFC model from a written brief and lets you finish it into a project in the browser. Image AIs return visuals; BIM Harness returns a building. From one sentence to a finished model: https://buildify.cz/bim-harness#demo (One written brief → a finished hospital pavilion · 1:09) ## Next step - A personal demo on your own brief - Access to the demo environment - No commitment, reply within 24 hours Free consultation or demo: contact kluch@buildify.cz. ## Related pages - [Buildify](https://buildify.cz/) — Markdown: https://buildify.cz/index.en.md - [Buildify Conexium](https://buildify.cz/cde) — Markdown: https://buildify.cz/cde.en.md - [bim-pulse CDE Connector](https://buildify.cz/cde-connector) — Markdown: https://buildify.cz/cde-connector.en.md - [BIM Budgeting](https://buildify.cz/bim-budgeting) — Markdown: https://buildify.cz/bim-budgeting.en.md - [Vývoj na míru / custom development](https://buildify.cz/vyvoj-na-miru) — Markdown: https://buildify.cz/vyvoj-na-miru.en.md - [CDE security & compliance](https://buildify.cz/cde/bezpecnost) — Markdown: https://buildify.cz/cde/bezpecnost.en.md - [Blog](https://buildify.cz/blog) — Markdown: https://buildify.cz/blog.en.md --- Zdroj / Source: https://buildify.cz/bim-harness · Kontakt: kluch@buildify.cz · Buildify Digital s.r.o., IČO 29541743, Korunní 2569/108, 101 00 Praha 10, Česká republika.