Gryffindor
Named After: Godric Gryffindor
Mascot: Lion
Element: Fire
Colors: Scarlet & Gold
Positive Traits: Courage, pride, heroism, bravery
Negative Traits: Arrogance, recklessness, lacking common sense, short-tempered
Head Teacher: Minerva McGonagall
House Ghost: Nicholas de Mimsy-Porpington (Nearly Headless Nick)
Common Room: Gryffindor Tower
Entrance to Common Room: Say the correct password to the painting of the , "Fat Lady"
Mascot: Lion
Element: Fire
Colors: Scarlet & Gold
Positive Traits: Courage, pride, heroism, bravery
Negative Traits: Arrogance, recklessness, lacking common sense, short-tempered
Head Teacher: Minerva McGonagall
House Ghost: Nicholas de Mimsy-Porpington (Nearly Headless Nick)
Common Room: Gryffindor Tower
Entrance to Common Room: Say the correct password to the painting of the , "Fat Lady"
Slytherin
Named After: Salazar Slytherin
Mascot: Serpent
Element: Water
Colors: Green & Silver
Positive Traits: Cunning, intelligence, ambitious
Negative Traits: Cruelty, intolerance, greed
Head Teacher: Severus Snape {deceased} - Horace Slughorn
House Ghost: The Bloody Baron
Common Room: Slytherin Dungeon
Entrance to Common Room: Speak aloud the current password in front of a stretch of damp stone wall
Mascot: Serpent
Element: Water
Colors: Green & Silver
Positive Traits: Cunning, intelligence, ambitious
Negative Traits: Cruelty, intolerance, greed
Head Teacher: Severus Snape {deceased} - Horace Slughorn
House Ghost: The Bloody Baron
Common Room: Slytherin Dungeon
Entrance to Common Room: Speak aloud the current password in front of a stretch of damp stone wall
Ravenclaw
Named After: Rowena Ravenclaw
Mascot: Eagle
Element: Air
Colors: Blue & Bronze
Positive Traits: Intelligence, lust for knowledge, studious, clever
Negative Traits: Lack of connection with the real world, emotionless, arrogant
Head Teacher: Filius Flitwick
House Ghost: The Grey Lady
Common Room: Ravenclaw Tower
Entrance to Common Room: Answer a logical riddle by a bronze eagle-shaped knocker
Mascot: Eagle
Element: Air
Colors: Blue & Bronze
Positive Traits: Intelligence, lust for knowledge, studious, clever
Negative Traits: Lack of connection with the real world, emotionless, arrogant
Head Teacher: Filius Flitwick
House Ghost: The Grey Lady
Common Room: Ravenclaw Tower
Entrance to Common Room: Answer a logical riddle by a bronze eagle-shaped knocker
Hufflepuff
Named After: Helga Hufflepuff
Mascot: Badger
Element: Earth
Colors: Yellow & Black
Positive Traits: Hard-working, honest, loyal, patience
Negative Traits: Stubbornness, stagnancy, laziness
Head Teacher: Pomona Sprout
House Ghost: Fat Friar
Common Room: Hufflepuff basement
Entrance to Common Room: Tap the correct barrel to the right tune
Mascot: Badger
Element: Earth
Colors: Yellow & Black
Positive Traits: Hard-working, honest, loyal, patience
Negative Traits: Stubbornness, stagnancy, laziness
Head Teacher: Pomona Sprout
House Ghost: Fat Friar
Common Room: Hufflepuff basement
Entrance to Common Room: Tap the correct barrel to the right tune
Credits:
http://harrypotter.wikia.com/wiki/Hogwarts_Houses
http://pottermoreanalysis.tumblr.com/post/29570824705/the-traits-of-the-four-houses-by-request