AI for BIM & IFC models

IFC Model Checker: Online BIM Data Validation

Upload an IFC and check its data in the browser: property sets, fire ratings, classification codes, U-values, COBie parameters, and asset tags, each finding cited back to the elements that failed. No desktop checker, no CAD licence, no rule-set install.

Nomic agent interface showing BIM model tasks: quantity takeoffs, coordination checks, and property validation running over an IFC building model
01 / Validation, checking, and what each one answers

Three different questions get called "model checking"

The openBIM landscape separates them, and knowing which one you need saves a lot of wasted effort. buildingSMART's free IFC Validation Service answers "is this file a valid IFC?" across four layers: STEP syntax under ISO 10303-21, the referenced IFC schema, normative IFC rules, and industry practices. It explicitly does not check project-specific, national, or organisation-specific requirements. IDS 1.0, the buildingSMART Information Delivery Specification, is the standard for stating those project requirements so a checker can test them. And then there is the question nobody has a standard for: does the model agree with the drawings and the specification issued alongside it.

  • File conformance against the IFC standard: buildingSMART's validation service, free and schema-level
  • Project requirements from a BEP or EIR: what IDS was designed to express
  • Model against the issued documents: where Nomic works, because the documents are in the same space
02 / Information delivery checks

Verify the model carries the data it should

BIM Execution Plans and Employer Information Requirements specify what data elements must carry. Nomic checks the IFC against those requirements directly: which doors are missing a fire rating, which walls are missing a thermal transmittance value, which elements lack a classification code. Every gap surfaces as a clear finding.

  • Check for missing property sets across any element category
  • Validate required values (fire ratings, U-values, COBie fields)
  • Flag elements that lack classification codes or asset tags
03 / How the agent validates

SQL-based checks over real property data

Nomic extracts every property set and quantity from the IFC into structured tables. The agent queries those tables to find elements where required fields are null, out of range, or inconsistent, returning a cited list with element IDs, categories, levels, and the specific missing or invalid data.

  • Query across all property sets in a single pass
  • Filter findings by category, level, or discipline
  • Export results as a structured issue log for model authors
04 / Handover compliance

Catch information gaps before handover

COBie and asset-data requirements are notoriously hard to validate manually. Nomic gives model authors and BIM managers a fast audit pass before handover, so information delivery deficiencies are caught and corrected while the authoring team is still engaged, not discovered by the FM team after contract close.

  • Validate COBie-required fields (space name, zone, floor, component data)
  • Check asset tags and maintenance-related properties for facilities handover
  • Compare model data against information delivery specification documents in the same project space
Outcomes

What teams get from this workflow

Model audits in minutes

A validation pass that used to take a BIM manager a day of manual spot-checking now runs in minutes against the full model.

Catch gaps before handover

Information delivery deficiencies surface during design when they are cheap to fix, not after contract close when they trigger disputes.

Consistent, repeatable checks

The same validation runs every time, against every element. No variation between reviewers, no manual spot-checking.

FAQ
Questions about this AI for BIM & IFC models workflow

Answers to common questions about this workflow.

Can I define custom validation rules for my project?

Yes. Ask the agent to check for any property, value, or combination of conditions defined in your BEP or EIR. You can also upload your information delivery specification document to the project space and ask the agent to compare the model against it.

Does Nomic validate against IDS (Information Delivery Specification)?

Nomic can check the properties and values specified in an IDS document. Upload the specification and ask the agent to validate the model against its requirements. Full automated IDS schema validation is on the roadmap.

Can Nomic check COBie data?

Yes. The agent can check for COBie-required fields including space names and numbers, floor assignments, component types, and maintenance-related properties. Ask "Which spaces are missing a COBie zone assignment?" and the agent returns the full list.

How do I share validation findings with the model author?

Export the validation results as Excel or JSON and share them with the model author. Results include element IDs, categories, levels, and the specific missing or invalid data: everything the author needs to locate and fix the issue in their authoring tool.

Can I check an IFC model online without installing anything?

Yes, for data checks. Nomic runs in the browser, so you upload the .ifc or .ifczip file and query the extracted tables without a desktop checker or a CAD licence. That covers property sets, classifications, fire ratings, quantities and COBie fields. It does not cover rule-set engines or IDS schema validation, which remain a separate job.

How is this different from the buildingSMART IFC Validation Service?

They answer different questions. The buildingSMART service is a free conformance check: it tells you whether a file is valid IFC against STEP syntax, the schema, normative rules and industry practices, and it states that it does not check project-specific or organisation-specific requirements. Nomic checks the content against what your project asked for, and against the drawings and specifications sitting in the same project space. Running the buildingSMART check first is good practice, because a malformed file makes every later check unreliable.

How do I configure the rules for a check?

In plain language rather than a rule editor. Describe the requirement the way the BEP or EIR states it, for example that every door on the egress path carries a fire rating and a classification code, and the agent writes the query against the extracted property tables. You can also upload the information delivery specification document itself and ask the agent to work through its requirements.

Where is the model processed, and who can see it?

Model files are processed in the Nomic project space and are visible to the people with access to that project, the same as the drawings and specifications alongside them. Nomic is SOC 2 Type II certified and operates under zero-data-retention agreements with its AI providers. Enterprise plans add multi-region data hosting in the EU, Australia, the US, and the UK. If a project mandates a specific residency, settle the region during evaluation rather than after the first model is uploaded.

“Nomic allowed our check to be more technical and focused on the engineering.”
Jacob EmmonsWater, Arcadis United States
See how Arcadis scales its engineering expertise
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"Nomic empowers us to build and deploy domain-specific AI to our whole global design team."

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Managing Principal Digital

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Engineering Capacity Increase

IFC Model Checker: Validate BIM Property Sets Online, No Install | Nomic