How to change the size of a window that is already placed in Revit?

Short Answer

Yes — in Autodesk Revit, you can change the size of a window that is already placed by selecting it and using Edit Type to switch to a different window type with the required dimensions, or by editing its type parameters if the family allows it. This only works if the family is parametric or suitable types already exist.

What You Need to Know Before

Warning: Many revit window families are type-based, so changing one placed window’s size can update every instance of that same type in the project. If the family is locked or not built with adjustable width and height parameters, you must load another type or edit the family itself.

How to Change the Size of a Placed Window in Revit

• Command: Edit Type

• Shortcut: No default keyboard shortcut

• Quick Steps:

  1. Select the placed window in the drawing area, then go to the Properties palette and click Edit Type.
  2. In the Type Properties dialog, change the Width and Height parameters if they are editable, or click the Type Selector at the top of Properties to choose another size.
  3. Click Apply or OK to update the window; if needed, use Duplicate first to create a new type so other windows are not changed.

Variables & Settings

• Key Setting: Type Properties > Width / Height
  These parameters control the physical size of the window type. If Duplicate is used before editing, the new size affects only the new type, not all existing windows of the original type.

Why it Fails

• Cause 1 (Geometry): The loaded window family may not have editable size parameters, or its geometry may be constrained by fixed reference planes.
• Cause 2 (layers/Locks): The window may be hosted in a wall with design constraints, or the family may be workshared and not editable because another user owns it.
• Cause 3 (Command/Logic): Revit windows are usually type-driven, not instance-resizable, so dragging grips will not resize them like 2D objects.

Quick Fix & Best Practice

• Quick Fix: Select the window, click Edit Type, then use Duplicate to create a new type before changing Width and Height.
• Manager’s Verdict: Use type duplication as the standard professional workflow; avoid editing the original type unless you intentionally want every identical window in the model to update.

FAQ

Can I resize a window by dragging it in Revit?
Usually no, because most Revit windows are controlled by type parameters.

Why does resizing one window change multiple windows?
Because all instances using the same window type share the same type dimensions.

What if Width and Height are grayed out?
The family is likely fixed-size, so you need another type or must edit the family.

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