Release 26.4 for Revit 2026

General:

This is the major release of IFC Exporter 26.4 for Revit 2026.
It contains various improvements and bug fixes for the previous 26.1 version.

Improvements and Bug Fixes:

• Corrected placement of assembly instances when exporting to IFC.
• Ensured rebar and related elements retain the proper material associations in IFC output.
• Fixed exported space elevation so IFC output reflects the correct Z values. (GitHub #907)
• Improved positioning of exported area elements to better align with the source model. (GitHub #891)
• Improved room export ordering to keep schedules consistent with the Revit model.

Release 25.4.4 for Revit 2025

General:

This is the major release of IFC Exporter 25.4.4 for Revit 2025.
It contains various improvements and bug fixes for the previous 25.4.3 version.

Improvements and Bug Fixes:

• Improved positioning of exported area elements to better align with the source model. (GitHub #891)
• Fixed exported space elevation so IFC output reflects the correct Z values. (GitHub #907)

Release 25.4.3 for Revit 2025

General:

This is the major release of IFC Exporter 25.4.3 for Revit 2025.
It contains a various improvements and bug fixes for the previous 25.4.0 version.

Improvements and Bug Fixes:

• Added angle units for some exported IFC files that only contained calculated angle values.
• Added explicit handling for IfcReinforcingElement type entity exceptions in schemas prior to IFC4.
• Added export of fabric reinforcement type to IFC.
• Added import of presentation layer assignment for the Open IFC feature.
• Added the ability to control rebar spatial containment when exporting to IFC.
• Added the ability to control the entity type of wall parts when exporting to IFC. (GitHub #756)
• Allowed export of map conversion scale attribute to IFC.
• Allowed export of material constituent fraction to IFC. (GitHub #651)
• Allowed groups to be exported as all IfcSystem types in IFC4.3 (and previous) versions.
• Export some specific geometry as IfcConnectedFaceSet instead of IfcClosedShell.
• Fix duplicated exported faces.
• Fix Schema - IfcMaterialProfileSetUsage.AssociatedTo for 4x3.
• Fixed IfcProductDefinitionShape.ShapeOfProduct export.
• Fixed a bug wrong geometry of curtain walls exported to IFC.
• Fixed a validation issue for Schema Entity Rule - IfcShapeModel.WR11 for 2x3, IFC4, 4x3.
• Fixed an issue to allow export of some files containing tapered walls with inserts to IFC.
• Fixed an issue to allow sub-categories turned off in the view to not be exported when choosing to export only elements in the view to IFC, regardless of the category mapping settings.
• Fixed an issue to include meshes when exporting DirectShape objects categorized as walls to IFC.
• Fixed an issue where an assembly gets exploded in IFC export when elements are DirectShapes.
• Fixed correct use of Operation Type attributes for Doors for IFC4 and 4x3.
• Fixed export of IfcSite.CompositionType attribute.
• Fixed export of multiple openings drawn using the Shaft tool that had the first outline verged exported.
• Fixed export of walls with openings placed next to clippings.
• Fixed export of wrong type entity for IfcSlab for IFC4x3.
• Fixed invalid exported IfcRelConnectsPortToElement.
• Fixed placement of assembly elements with vector correction.
• Fixed the instance view for a link with view overrides when the Revit model is exported using the Export as separate IFCs option.
• Fixed the placement of openings in exported columns. (GitHub #746)
• Fixed the positioning of some ceiling grids exported to IFC using metric templates.
• Fixed the problem with Unable to change the IFC Predefined Type for the IFC4 file exported from Revit.
• Fixed type properties export to IFC with user property set for furniture (IfcFurnishingElementType).
• Fixed unexpected errors exporting to IFC4 this small structural beam with Base Quantities.
• Fixed unexpected errors while exporting door elements to the IFC file at Doors-Shaft.
• Fixed user-defined Table property data type.
• Improved alignment of doors that are slightly off-axis.
• Improved export of combined parameters in schedules to IFC as property sets when they contained type parameter components, project information components, or were empty.
• Improved export of some shape-edited floors to IFC.
• Improved export of some swept geometry to IFC.
• Improved export of volumetric quantities to IFC.
• Improved linking of IFC files when using templates that had constrained levels.
• Improved linking of some grid lines and axes from slightly invalid IFC4 files.
• Improved placement of some linked files when doing a federated export to IFC.
• Improved positioning of elements within assembly when exporting to IFC.
• Improved positioning of some elements that are contained in assembly when exporting to IFC.
• Improved support for some EPSG codes when exporting to IFC4 or higher.
• Improved the accuracy of some quantity calculations when exporting IFC files.
• Improved the export of wall infills to IFC.
• Removed an export of uncertified IfcExtendedMaterialProperties to ifc2x3CV2.
• Removed deprecated attributes LandTitleID /SiteAddress in IFC4.3, supported by Pset_LandRegistration and Pset_Address instead.
• Updated IfcDoorTypeOperationEnum for 4x3 to fix warnings during export to IFC.

Release 26.1 for Revit 2026

General:

This is the first version of IFC Extension for Revit 2026.

Release 24.3.20 for Revit 2024

General:

This is the minor update of IFC Exporter for Revit 2024.

Improvements:

• Fixed an unexpected export error using RCE.
• Implemented an option that allows exporting properties along with instance properties.
• Newtonsoft.Json version updated.

Release 23.4.1 for Revit 2023

General:

This is the minor update of IFC Exporter for Revit 2023.

Improvements:

Fixed an unexpected export error using RCE.
Implemented an option that allows exporting properties along with instance properties.
Newtonsoft.Json version updated.

Release 25.4 for Revit 2025

General:

This is the major release of IFC Exporter 25.4 for Revit 2025.
It contains a various improvements and bug fixes for the previous 25.2 version.

Improvements:

• Added option that allows to export ceiling grids.
• Implemented the ability to add type properties to instance properties for user-defined property sets.

Bug Fixes:

• Restored the functionality of the IFC Export As parameter when using the IFC Exporter version lower than Revit.

Release 23.4 for Revit 2023

General:

This is the update of IFC Exporter for Revit 2023.
It contains various improvements and bug fixes for the basic Revit 2023.

Improvements:

• Added filename to the journal when export IFC if the default is used.
• Added information to IfcOwnerHistory when exporting to IFC.
• Add new user defined units export.
• Added Revit Content Identifier to IFC export.
• Added Width as an exported quantity to IFC for some assembly-based walls.
• Allowed export of some elements to IFC4 Reference View [Structural] that had no material assignments.
• Allowed some old IFC configuration settings to be upgraded.
• Changed the behavior of the warning message when exporting to IFC 4 if elements in a Revit model are far from the origin so that the warning appears only if an EPSG code is also set.
• Implemented unique and consistent naming for IfcShapeAspect and IfcMaterialConstituent pairs.
• Improved area and volume base quantities export for slabs as part of the roof.
• Improved exporting all layers of some walls to IFC 4 when the option to split by level was chosen.
• Improved stability of exporting to IFC when the Revit model has corrupted extensible storage data.
• Improved stability when exporting files to IFC with some short, invalid IFC entity names set in the Export to IFC As and Export Type to IFC As parameters.
• Improved support for adding properties to PSet_ZoneCommon.
• Improved the color assignments for some elements exported to IFC 4.
• Improved the export of current view only IFC files when the phase of the view has changed since it was first set in the IFC export settings.

Bug Fixes:

• Added type parameter set export for Revit elements whose corresponding IFC 2x3 entity didn't have a type entity associated with it, such as ramps, stairs, and footings.
• Corrected placement of some families inside assemblies when exporting to IFC.
• Fixed a shifting of TriangulatedFaceSet geometry elements.
• Fixed body representation for walls export to the IFC4RV.
• Fixed bug with renaming IFC configuration makes the revit-session remember the old and the new IFC configuration.
• Fixed classifications export for systems.
• Fixed export of linked file orientation when exporting linked files to the same site.
• Fixed export of model line placement elevation for 2D representation.
• Fixed export of room elevation.
• Fixed export of walls with openings placed next to clippings.
• Fixed export of GrossArea to IFC4 QTO base quantities for Revit walls exported as IfcCovering.
• Fixed a IsExternal parameter for windows exported to IFC.
• Fixed a placement of beam openings.
• Fixed the processing of the Export to IFC parameter for the assemblies.
• Fixed Width parameter for IfcSlab and IfcCovering exported to IFC4 QTO base quantities.
• Improved base quantities calculation for slab elements with openings.
• Improved base quantities calculation for spatial elements.
• Improved calculations of gross volume and gross side area when exporting some walls with openings to IFC 4.
• Improved error handling for invalid Revit file with missing project base and survey points.
• Improved export of some beams to IFC where the geometry was previously inverted in the IFC file.
• Improved export of some beams with openings to IFC 4.
• Improved export of some missing elements when exporting linked documents to IFC.
• Improved the export of some walls that had doors or windows with multiple voids in the original family.
• Improved performance of some elongated elements export to IFC 4.
• Improved linking invalid IFC files with unbounded curves as part of their geometric representations.
• Removed some IFC export configuration settings that didn't get properly renamed or deleted by Revit.

Release 24.2.20 for Revit 2024

General:

This is the update of IFC Exporter for Revit 2024..
It contains various improvements and bug fixes for the basic Revit 2024.

Improvements:

• Added filename to the journal when export IFC if the default is used.
• Added information to IfcOwnerHistory when exporting to IFC.
• Add new user defined units export.
• Added Revit Content Identifier to IFC export.
• Added Width as an exported quantity to IFC for some assembly-based walls.
• Allowed export of some elements to IFC4 Reference View [Structural] that had no material assignments.
• Allowed some old IFC configuration settings to be upgraded.
• Changed the behavior of the warning message when exporting to IFC 4 if elements in a Revit model are far from the origin so that the warning appears only if an EPSG code is also set.
• Implemented unique and consistent naming for IfcShapeAspect and IfcMaterialConstituent pairs.
• Improved area and volume base quantities export for slabs as part of the roof.
• Improved exporting all layers of some walls to IFC 4 when the option to split by level was chosen.
• Improved stability of exporting to IFC when the Revit model has corrupted extensible storage data.
• Improved stability when exporting files to IFC with some short, invalid IFC entity names set in the Export to IFC As and Export Type to IFC As parameters.
• Improved support for adding properties to PSet_ZoneCommon.
• Improved the color assignments for some elements exported to IFC 4.
• Improved the export of current view only IFC files when the phase of the view has changed since it was first set in the IFC export settings.

Bug Fixes:

• Added type parameter set export for Revit elements whose corresponding IFC 2x3 entity didn't have a type entity associated with it, such as ramps, stairs, and footings.
• Corrected placement of some families inside assemblies when exporting to IFC.
• Fix IfcCountMeasure for IFC4x3.
• Fixed a shifting of TriangulatedFaceSet geometry elements.
• Fixed body representation for walls export to the IFC4RV.
• Fixed bug with renaming IFC configuration makes the revit-session remember the old and the new IFC configuration.
• Fixed classifications export for systems.
• Fixed export of linked file orientation when exporting linked files to the same site.
• Fixed export of model line placement elevation for 2D representation.
• Fixed export of room elevation.
• Fixed export of walls with openings placed next to clippings.
• Fixed export of GrossArea to IFC4 QTO base quantities for Revit walls exported as IfcCovering.
• Fixed a IsExternal parameter for windows exported to IFC.
• Fixed a placement of beam openings.
• Fixed the processing of the Export to IFC parameter for the assemblies.
• Fixed Width parameter for IfcSlab and IfcCovering exported to IFC4 QTO base quantities.
• Improved base quantities calculation for slab elements with openings.
• Improved base quantities calculation for spatial elements.
• Improved calculations of gross volume and gross side area when exporting some walls with openings to IFC 4.
• Improved error handling for invalid Revit file with missing project base and survey points.
• Improved export of some beams to IFC where the geometry was previously inverted in the IFC file.
• Improved export of some beams with openings to IFC 4.
• Improved export of some missing elements when exporting linked documents to IFC.
• Improved the export of some walls that had doors or windows with multiple voids in the original family.
• Improved performance of some elongated elements export to IFC 4.
• Improved linking invalid IFC files with unbounded curves as part of their geometric representations.
• Removed some IFC export configuration settings that didn't get properly renamed or deleted by Revit.

Release 25.2 for Revit 2025

General:

This is the first version of IFC Exporter for Revit 2025.
It contains various improvements and bug fixes for the basic Revit 2025.

Improvements:

• Added type information when exporting Rebar couplers to IFC.
• Allowed export of some elements to IFC4 Reference View [Structural] that had no material assignments.
• Allowed Revit to preserve the active site after IFC export.
• Allowed some old IFC configuration settings to be upgraded.
• Better treatment of IfcSpatialZones and zones in general.
• Improved base quantities calculation for spatial elements.
• Improved category mapping dialog.
• Improved error handling for invalid Revit file with missing project base and survey points.
• Improved export of classification data to IFC for curtain wall doors.
• Improved export of classification description to IFC.
• Improved export of IsExternal parameter, removed support at type level.
• Improved performance of some elongated elements export to IFC 4.
• Improved positioning of linked instances when exporting to IFC.
• Improved the color assignments for some elements exported to IFC 4.
• Improved the export of current view only IFC files when the phase of the view has changed since it was first set in the IFC export settings.
• Improved the validity of exported IFC files when exporting some planar geometry.

Bug Fixes:

• Corrected placement of some families inside assemblies when exporting to IFC.
• Fixed bug related to the exported grids to IFC if the project base elevation was significantly far from the origin.
• Fixed export of GrossArea to IFC4 QTO base quantities for Revit walls exported as IfcCovering.
• Fixed export of some missing elements when exporting linked documents to IFC.
• Fixed export of walls with openings placed next to clippings.
• Fixed Width parameter for IfcSlab and IfcCovering exported to IFC4 QTO base quantities.
• Fixed wrong elevation of linked models exporting host file with links to one IFC file.