Sometimes, no matter how much planning you do, things don't always turn out how you'd imagined. Whether it's a door in the wrong place or an oddly positioned bathtub, home design ideas can get a little out of hand.

But weird designs aren't always a bad thing, as one self-taught designer has proved, after installing the most incredible studio apartment in the weirdest place imaginable.

Keep scrolling for his finished masterpiece...

If you're thinking about re-designing, it might be a good idea to hire a professional.

But even then, you can't always trust their expertise... So check out these terrible, terrible design choices in buildings and wonder if anyone got fired for these mistakes. Because they should have.

Where's your toilet?

Oh, just down the hall.

It's so refreshing to eat a sandwich and take a bath...

In the same room.

That's a close friendship...

A little too close.

Just a smidge to the left...

Perfect.

I think they missed the point...

But at least they tried.

Urm...

Why?

But surprisingly, not all weirdly placed design ideas are bad...

One guy has created the most incredible secret studio apartment under a bridge, and the finished design is totally awesome.

Self-taught designer Fernando Abellanas has installed the most incredible studio apartment beneath a graffiti-covered bridge in Valencia, Spain.

via: Vimeo

Providing the perfect secret hideaway, to get away from it all.

Abellanas, designs furniture and lighting under the studio name Lebrel.

via: Vimeo

He managed to create the small timber and metal-framed hut in just two weeks!

He prefers not to reveal its exact location within the city.

via: Vimeo

But said he is often drawn to design huts for neglected spaces.

He opened up about his desire to create things that seem out of the ordinary.

via: Vimeo

"I feel a great attraction for this type of place and sometimes I make interventions in them. I depend a lot on the conditions offered by the place," he said.

These spaces offer him a place where he can get away from it all.

via: Vimeo

"It is a personal intervention that tries to put value in these type of spaces. It is also about recovering those sensations of the huts we used to make as small ones. To stay isolated but at the same time close to our house, the city."

The runners allow the studio to be moved using a hand crank.

via: Vimeo

It can be rolled along the beams to join a column, which is fitted with wooden shelves, a tabletop, and a plastic chair, or towards the top of a bank for easy access.

The design looks like an urban cabin, offering a retreat from the bustle of the city while also being in the centre of it all.

via: Vimeo

The shelving offers a workspace but also stores bedding and a lamp, allowing him to camp out in his creation.

It really is the perfect little studio.

via: Vimeo

"In this case we are not referring to an idyllic hut you would find in the middle of the woods but rather to tiny spaces recovered from the city itself, where you can hide from the city's hectic pace," Abellanas said.

It's definitely not something you expect to see just passing.

via: Vimeo

"These are locations that due to their architecture, location or size have become useless. People hardly notice when walking by."

It gives him a sense of freedom...

via: Vimeo

"When we discover, analyse and inhabit these places it reminds us of the feelings of isolation, peace and protection we experienced during childhood when hiding, during a family event, under a round table covered with a long tablecloth," he added.

Wooden panels forming the sides of the structure hinge down or outwards.

via: Vimeo

Giving Abellanas an unobstructed view out of the hideaway.

Take a look at his studio apartment below...

Now that's impressive. Keep scrolling for some of Instagram's worst interior design ideas...