Revit Tools by Avant Leap

RedLine

Know Exactly What Changed Between Model Versions

Sub-millimeter precision (0.001 ft). Supports Revit 2024, 2025, and 2026.

RedLine compares your host document against a linked baseline and identifies new, deleted, and modified elements across 20+ AEC categories — with color overrides or shared parameter output.

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Engineer reviewing technical blueprints and model changes

Key Capabilities

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ElementId-Based Comparison

Compares host model against a linked baseline by ElementId — accurate for version comparison of the same file, where IDs are stable across saves.

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Location Change Detection

Detects moved elements with sub-millimeter precision (0.001 ft tolerance). Supports both point elements (furniture, equipment) and linear elements (walls, pipes, beams).

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Graphic Override Output

Highlight changed elements in any Revit view using color overrides — projection lines, surface fills, and cut graphics. Eight semantic colors available.

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Shared Parameter Output

Write NEW, DELETED, or MODIFIED values to a named shared parameter on each affected element — enabling schedules, view filters, and Dynamo downstream workflows.

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Pre-Flight Validation

Three-level validation (Error, Warning, Info) checks document state, link status, category selection, view configuration, and parameter availability before execution.

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Revit 2024–2026

Full support for Revit 2024 (.NET 4.8) and Revit 2025–2026 (.NET 8.0) from a single shared codebase.

Change Types

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NEW

Element exists in the linked baseline but not in the host — added since the baseline was saved.

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DELETED

Element exists in the host but not in the linked baseline — removed since the baseline was saved.

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MODIFIED

Element exists in both but its location changed beyond the 0.001 ft tolerance — moved since the baseline was saved.

Frequently Asked Questions

RedLine compares the host document against a Revit Link of the same model using ElementId matching. It identifies which elements were added, removed, or moved beyond a sub-millimeter tolerance.
Before coordination meetings: save the current model as a baseline, continue working, then link the baseline and run RedLine to see exactly what changed.
No — RedLine detects positional changes only (location movement beyond 0.001 ft). Parameter value changes, type/family changes, and rotation-only changes are not flagged as MODIFIED.
RedLine supports Revit 2024, 2025, and 2026. All three versions are built from a single shared codebase.

Always Know What Changed

Sub-millimeter precision, instant visual feedback, and actionable output for every coordination cycle.

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