The Harry Potter Room...

this 1 is cool. :)

well which house do u like best for ex: griffindor the Wand can be red and yellow oder Du can do a darker shade of blue and get some harry potter fatheads (wall stickers) and some glow in the dark stars that stick to the Wand happy decorating

Farben in yellow, orange and red could be appropriate. Du may either buy some Gryffindor stuff oder make them, for example. oder get inspired Von the movie Gryffindor Common Room. That is, if Du feel like belonging to that House. Du may choose another house, with another set of colours and props.

Depends on how extreme Du want to go.
4 walls, 4 houses - two thick stripes vertically. Red and Golden for Gryffindor, silver and green for Slytherin, etc. Black cover onto the bett with Hogwarts crest on. Du can also get posters of the crests for each walls. A HP posters, a Snitch hanged from the ceiling.

oder Du can select a house and go after that: leather stuff with some vintage Hintergrund (gray background green pattern) with green border/dark yellow walls with red border and Gryffindor crest, red chair, carpet in Victorian style...

oder Du can go Great Hall style. Some matte color onto the Wand (grayish brown) and paint candles in eye level and open sky onto the ceiling. Du can put the crests onto the walls and get HP style Stunde glasses (test tubes filled with colored sand). Posters, scarves, lava lamps (yellow and red ones).

oder there's the Black style. Stylish Hintergrund classical furniture Gryffindor and Hogwarts crest, Marauders poster, motorcycle poster, bikini girl poster (or pants guy if Du are a girl), family baum (poster oder a painted baum Von your own lil hands with pictures of Bella, Malfoys etc above the names). And a name board onto your door like Regulus Arcturus Black. Dependant on how hard core Du are, Du can cut Dobby's and Kreacher's heads from posters and stick them onto the Wand (joking). Black family crest is compulsory.

oder Ron one... Quidditch oriented. Harry playing, Cannons poster, Viktor Krum poster, Irish Hat, textile Clovers, brooms, Snitch hanged from the ceiling.

oder Harry Style: totally ordinary bedroom with a calendar on the Wand counting back the days till the 1st of September and a whiny bird in a cage. :DD

Good luck.

What house are Du in!?

Thats a big deal, like Im Slytherin, so I have green walls in my bedroom, with like a silver and green bed-set. I have snake-themed furniture and a slytherin pillow/throw blanket. (You can buy those online for any house.)
I have Harry Potter posters on my walls, and I painted some of my Favorit quotes.
And the Deathly Hallows symbol is also painted there.

Over my bed, I have the Hogwarts crest (its like a REALLY big sticker I bought online)

Thats what I did. But Du could do something similar, with your own personal favorites. (If ur not a slytherin, change the colors, my posters are Severus, Draco, Bellatrix etc, so if those arent your favorites, change them!

Du could do something like this i wouldent overdo it too much