They date back to the early 1900s.

Here's how to spot them.

Here's a primer.

And what we can learn from them.

And why it matters.

Follow these steps.

A tiny space with big potential.

Kiss dorm life goodbye.

According to an expert.

Could you pick a bi-furcated staircase out of a lineup?

It has two important elements.

A modular home is a home that is built in a factory and moved to its building site in sections. Once there, the sections are connected and the home is placed on a permanent foundation. 

Here's what to know.

They have intel for buyers in urban and rural markets.

It's important.

So you can plan and budget.

Could you pick out a casement window from a lineup?

Coming up with that cash is no small feat.

They're different from "flex apartments."

Sadly, this type of architecture isn't edible.