Mockup / Concept Art of Treehouse

I'd contact support to ask....haha! It's funny they sent you here. I don't actually know what the legal stance on this is, but I have an idea.

I think that the general scope is that copywrites and trademarks are to protect a company assets from being directly infringed upon and damaging the company. I think that, that is the key here, are you damaging the company you're using as a redesign subject for your Behance page? Probably not.

As long as you make it clear it was a study or exercise in design, and you're not trying to act like you represent Treehouse, or your their lead designer, or some other whacky, obviously crossing boundaries scenario, you should be fine.

I've seen other designers do this with facebook, twitter, etc. I've never heard of anyone getting in trouble for it. Now obviously you couldn't start a website like Treehouse, and steal their layout, style, colors, etc...but you're not talking about doing that.

I'm kinda rambling here, but all that to say, it's probably a gray line, it's always going to be a gray line, I'm not a lawyer, do it tastefully, truthfully, and responsibly, and you'll be fine.

The most common worst case scenario is if you did this with any company, they may hit you with a cease and desist, and as long as you respond and remove the project from the web, that's all the further it goes. Companies really aren't interested in firing up a few $3,000 per hour lawyers to go after someone like you or me, unless you're causing them more than that in damages. They'll just let a paralegal send the cease and desist letter out instead.

There is a reason why Treehouse pointed you back to the forums for this question.