What’s the Difference Between LOD 300, 350, and 400 in Scan to BIM?

8 / 8 / 2025

Let’s be honest. BIM jargon can sound like alphabet soup if you’re not knee-deep in the industry. And if you’ve ever scratched your head over terms like LOD 300, LOD 350, or LOD 400, you’re not alone.
But here’s the thing: when it comes to Scan to BIM, understanding these levels of development (LOD) isn’t just about ticking boxes. It’s about knowing how much detail you actually need, and when.
Let me explain.

So… What Does LOD Even Mean?
LOD stands for Level of Development. In plain English, it tells you how much information and detail is packed into your 3D BIM model.

Now, in the Scan to BIM workflow, where we start with a point cloud or laser scan of an existing structure and turn it into a 3D model, LOD acts as the scale of depth. The higher the LOD, the richer and more construction-ready your model is.

Think of it like making a pizza:

LOD 300: is the dough and sauce. You’ve got the basic structure and intent.
LOD 350: adds the toppings. There’s more coordination, more clarity.
LOD 400: That’s your fully baked, restaurant-ready pie. Ready to serve on-site.

Let’s slice this up properly.

1) LOD 300: The “Just Enough to Get Going” Phase

This is where things start to look like an actual building.. At LOD 300, the model includes:

General dimensions like length, height, and placement
Key elements such as walls, floors, roofs, doors, and windows modeled accurately in size and location
Basic spatial relationships

But, and it’s a big but, it’s still design-intent level. It shows what’s supposed to be there, but not necessarily the fine details of how it’s constructed or connected.
For renovation planning, early coordination, or basic quantity take-offs, LOD 300 often gets the job done. But if you’re planning to fabricate components or coordinate tight MEP spaces? Keep reading.

2) LOD 350: The “Getting Serious About Coordination” Phase

Now we’re moving into the heavy-lifting zone. LOD 350 doesn’t just show objects. It shows how they interact. You’ll start seeing:

Detailed connections between building systems, like how ducts connect to diffusers
Accurate penetration modeling, including openings for pipes, conduits, beams, and more
Clear interfaces between architectural, structural, and MEP elements

This level is often used during clash detection, coordination meetings, and construction documentation.
If you’ve ever been on-site trying to install a cable tray that clashes with a beam, then you already know the pain. LOD 350 helps prevent that headache.

3) LOD 400: The “Let’s Build It” Phase
This one’s a whole different beast. LOD 400 is fabrication-level detail. It’s where the Scan to BIM model isn’t just a reference. It becomes part of the actual build process. Expect:

Highly detailed and dimensioned components, ready for manufacturing or pre-fab
Info-rich elements that include manufacturer data, material specs, and connection details
Model elements aligned with actual construction sequencing

If you’re doing modular construction, prefabricated MEP systems, or need shop drawings directly from the model, LOD 400 is your go-to. It’s not overkill when precision and accountability are critical.
But here’s your heads up. It’s also more time-consuming and costly to produce.

Which LOD Do You Need?

Ah, the million-dollar question.
There’s no one-size-fits-all answer here. It really depends on why you’re creating the model and who’s using it.

Just documenting existing conditions? LOD 300 will likely be fine.
Coordinating MEP with architecture? LOD 350 gives you more confidence.
Building from the model or fabricating parts off-site? You’ll want LOD 400, no question.

Also, remember this. Going higher in LOD isn’t always better. It’s about fit for purpose, not just adding detail for the sake of it.

Final Thoughts: It’s All About Intent (and Budget)

Scan to BIM is a powerful tool. But it works best when the level of detail matches the job.
Whether you’re preserving a historic church, renovating an old commercial building, or coordinating ductwork in a new hospital wing, understanding LOD 300, 350, and 400 can help you plan smarter and avoid a lot of late-stage scrambling.

So next time someone asks you what LOD you need, you won’t blink. You’ll just ask, “What’s the model for?” That, my friend, makes all the difference.