Working model in place in Revit means building a solid inside the project itself, with no separate library file. It suits shapes that occur exactly once: a curved reception desk, a piece of façade decoration, a planter built on site.
This article runs from the two dialogs that appear before you draw, through to joining and carving solids. To learn modelling and documentation end to end, see the Revit Architecture course.
An in-place family in Revit: when it is the right choice
The rule fits in a sentence: anything that will be reused belongs in its own .rfa file; anything that occurs only once in this project belongs in place.
An in-place solid cannot travel to another project, and using many of them makes the file heavy. Building .rfa families is covered in how to create a family in Revit, including the five form tools shared by both environments. Every in-place family Revit creates is stored inside the project file, never as a separate .rfa.
The tool sits on the Architecture tab, Build panel, button Component, item Model In-Place.
The Revit family category: the first dialog and three consequences
Click Model In-Place and Revit asks two questions before letting you draw. Do not click through them: the first settles three things that are hard to change later.
| No. | Component | What it means |
|---|---|---|
| 1 | Category search box | Type a few letters to filter. Type Generic and Generic Models appears at once |
| 2 | Category list | Air Terminals, Casework, Ceilings, Columns, Doors and dozens more |
| 3 | Family Parameters table | Parameters belonging to the chosen category. For Generic Models the table is empty |
The three consequences of that choice:
| Consequence | Why |
|---|---|
| How it displays | Every category carries its own conventions for line, colour and which views it appears in |
| How it schedules | Schedules filter by category. A form left as Generic Models never reaches the joinery schedule — see schedules in Revit |
| How it hides | Visibility/Graphics switches by category — see hiding and showing elements in Revit |
When unsure, pick the category that genuinely fits rather than defaulting to Generic Models. A planter belongs in Planting or Site; a bar counter belongs in Casework.
The Name dialog and the Create tab
The second dialog asks for a name. Give it a meaningful one here, because that name appears in the Project Browser and in schedules.
The ribbon switches to the editor's own tabs: the Architecture tab disappears and the first tab is now Create. The six panels below are the ones this article uses; the rest are Select, Control and Connectors, which belong to services components.
| Panel | What it holds |
|---|---|
| Properties | Two small buttons: reopen the category dialog, and open Family Types |
| Forms | Five solid form tools plus Void Forms for negative geometry |
| Model | Model Line, Component, Model Text, Opening, Model Group |
| Datum | Reference Line and Reference Plane — the framework shapes lock onto |
| Work Plane | Set, Show, Viewer. Click Set before drawing if the profile belongs on another plane |
| In-Place Editor | Finish Model ends and commits the solid; Cancel Model discards it |
The project locks while you build in place
While an in-place solid is being built, the whole project is locked, exactly as when sketching a floor boundary. Walls cannot be selected and other tools will not open. Only Finish Model or Cancel Model releases it.
This confuses people regularly: they assume Revit has frozen when the command simply needs finishing. The tell is that the Architecture tab has gone, replaced by a Create tab with the In-Place Editor panel at its end.
What each form tool needs drawn first
The commonest mistake is running a tool and then not knowing what to draw. This table says how many profiles each one needs, and on which plane.
| Tool | What to draw first |
|---|---|
| Extrusion | One closed profile on the work plane. Height goes in the Depth box |
| Blend | Two closed profiles drawn in turn: Base, then Top |
| Revolve | One closed profile and an axis line. The axis must share the profile's plane and must not cross it |
| Sweep | A path and a profile. Draw the path first; Revit then raises a perpendicular plane for the profile |
| Swept Blend | A path and two profiles, one at each end |
Every profile must be closed and non-self-intersecting. An open loop raises an error on the tick. Two nested loops make the inner one a hole — not a fault, but the quickest way to make an opening.
Each tool and the four-step Extrusion sequence are covered in how to create a family in Revit, since the same tools serve both environments.
Join geometry for in-place solids: merging several into one
A real component is rarely a single solid. It is usually several solids merged, with a few places carved away.
| Item | What it does |
|---|---|
| Join Geometry | Click the first solid, then the second. The two become one |
| Unjoin Geometry | Separates two joined solids |
| Switch Join Order | Reverses the join, for when a material reads the wrong way round |
Joining removes the visible edge between the solids in section, and quantities count once instead of twice. Autodesk documents the tool on Join Geometry, noting that it also works between host elements and in-place families.
Join order changes the final shape: joining A to B differs from B to A in which solid wins where two materials meet. If the result looks wrong, use Switch Join Order. Which element cuts which between walls, floors and columns, and how quantities change, is covered in Join Geometry vs Disallow Join vs Wall Joins.
Revit cut geometry and void forms: two ways to carve
| Item | What it does |
|---|---|
| Cut Geometry | In the editor: click the void first, then the solid to be carved |
| Uncut Geometry | Removes the cut and restores the solid |
Revit void forms are the tidiest route when the opening is known in advance. The button sits on the Create tab, Forms panel. Click it, pick one of the five tools such as Void Extrusion, and sketch as you would for a solid. A void is invisible in the project; it leaves only the cut it makes. Autodesk explains how solids and voids act on each other on About Creating Solid and Void Geometry.
One detail many people miss: a void cuts only geometry that already existed when it was made. To make it cut solids created afterwards, assign them with Cut Geometry, as Cut Geometry states plainly.
Never patch a badly drawn solid with a void. Correcting the solid is always tidier; voids belong to real openings such as a service hole or a recess.
When a cut or join refuses to run, Autodesk lists the usual messages and their causes on Cut or Join Geometry Fails.
Try it: build a reception desk in place
A thirty-minute exercise. It runs through model in place in Revit end to end; work on a model that already has walls and a floor.
- Go to Architecture, Component, and choose Model In-Place.
- In the category dialog, type
Caseworkand select it. Note what the Family Parameters table holds. - Name the solid
RECEPTION-DESKand click OK. - Try clicking a wall in the project. Note what happens and explain why.
- Click Extrusion, check the work plane, draw a closed rectangle, set Depth to 900 and click the tick.
- Build a second Extrusion overlapping part of the first.
- Switch to the Modify tab (next to Create), Geometry panel, open the Join drop-down and run Join Geometry on the two. Compare the section before and after.
- Back on the Create tab, Forms panel, click Void Forms › Void Extrusion. Sketch a small rectangle overlapping the main solid and click the tick. If the void does not cut yet, run Modify › Geometry › Cut Geometry, click the void first, then the solid.
- Click Finish Model. Select the finished solid and read its category in Properties.
- Open a Casework schedule and check whether the solid appears.
Steps 4 and 10 are the two worth doing carefully: one shows the project lock, the other shows what the category choice really costs.
Frequently asked questions
When should I build in place rather than make a family?
Build in place for anything that occurs once in this project. Make an .rfa family for anything reused, or anything needing parameters to change size.
I cannot select walls while building a solid. Is Revit stuck?
No. The project is locked while an in-place solid is open. Click Finish Model or Cancel Model to leave.
How do I change a category I chose by mistake?
Select the solid, click Edit In-Place, then reopen the category dialog from the Properties panel. Better to choose correctly at the start, since a change drags display and scheduling with it.
Why does my void not cut a solid I just built?
A void cuts only what existed when it was created. For later solids, assign them explicitly with Cut Geometry.
Related articles
- How to create a family in Revit — the five form tools and when a separate file is better
- Groups in Revit — grouping instead of modelling when there are many copies
- Schedules in Revit — why the category decides whether a solid reaches the schedule
- Hiding and showing elements in Revit — switching visibility by category