Revit Families
Concrete Bureau builds smart, lightweight and fully customisable Revit families optimised for performance. Whether you need a single complex component or a standardised library, we deliver families that behave correctly and keep your models fast.
What are custom Revit families?
Revit families are the reusable, parametric building blocks of a BIM model — doors, fixtures, equipment, structural components and more. Well-built families carry the right parameters and behaviour, flex predictably, and stay light so they don’t bloat your project.
We create families at LOD 200–400 with proper parametric relationships and the specific behavioural parameters your workflow needs, then hand them over ready to drop into your templates.
Who it is for
- BIM managers standardising a company family library
- Manufacturers who need product families for specifiers
- Design teams missing a specific component or assembly
Common family types we build
We build families across every discipline and complexity level, including:
- Architectural — doors, windows, fixtures and casework
- MEP — equipment, fixtures and system components
- Structural — connections, assemblies and structural components
- Manufacturer product families for specifiers and BIM libraries
What you get
- Families at LOD 200–400, modelled for performance
- Parametric relationships between elements
- Inclusion of specific behavioural parameters
- Delivery in Revit (.rfa) format
- A brief user guide for each family
- Support for nested and shared parameters where the family requires them
- A quick compatibility check against your existing template or library
What makes a family slow — and how we avoid it
- Deeply nested families and excessive voids/joins that multiply regeneration time
- Overuse of formulas and reporting parameters where a simpler constraint would do
- Unnecessary detail in symbolic/2D representations that never gets seen at model scale
- Type catalogs used instead of dozens of near-duplicate family files
LOD levels explained
We build families to LOD 200–400 depending on how they'll be used in your model. Here's what each level means in practice:
| LOD | What it means | Typical use |
|---|---|---|
| LOD 200 | Approximate geometry, size and location — quantities are generalised | Early design and space planning |
| LOD 300 | Precise geometry, accurately sized and located for the project | Coordination and construction documentation |
| LOD 350 | LOD 300 plus interfaces with other building systems | Multi-discipline clash detection |
| LOD 400 | Fabrication-level detail, including assembly information | Shop drawings and fabrication |
Why family quality matters
A poorly built family is easy to miss until it slows down every model it's placed in, breaks a schedule, or behaves unpredictably when a parameter changes. Because families get reused across dozens of projects, a problem built in once keeps causing rework everywhere that family is used.
Building them right the first time — lightweight, properly parametrised and tested against the parameters your workflow actually needs — is what keeps a growing family library an asset instead of a liability, and lets the same family move safely between projects without someone having to check it over first.
Our process
Requirements
We agree geometry, parameters, behaviour and the LOD for each family.
Build & parametrise
Modelling with clean parametric relationships and the required parameters.
Test
We flex every family through its parameters and check behaviour under real-world use.
Deliver
Handed over as .rfa files with a concise user guide, ready to drop into your templates.
FAQ
- What format are families delivered in?
- Native Revit families as .rfa files, ready to load into your project or template.
- Will the families be parametric?
- Yes. We build parametric relationships and include the specific behavioural parameters you need.
- Do you optimise for performance?
- Families are modelled to stay lightweight so they do not slow down your models.
- Can you match families to our existing standards?
- Yes. We build to your naming, parameter and template conventions where they exist, or recommend a clean structure where they don't.
- Can you build families from a manufacturer's spec sheet or catalogue?
- Yes. We regularly build product families directly from manufacturer data sheets, catalogues or physical samples.