Gryffindor - values courage, bravery, daring, nerve and chivalry. Its mascot is the lion, and its colours are scarlet and gold. The Head of this house is the Transfiguration teacher, Minerva McGonagall, and the house ghost is Sir Nicholas de Mimsy-Porpington, more commonly known as Nearly Headless Nick. According to Rowling, Gryffindor corresponds roughly to the element of fire. The founder of the house is Godric Gryffindor.
Hufflepuff - values hard work, loyalty, tolerance, and fair play. They are also particularly good finders. The house mascot is the badger, and canary yellow and black are its colours. The Head of this house is the Herbology teacher Pomona Sprout, and the house ghost is The Fat Friar. According to Rowling, Hufflepuff corresponds roughly to the element of earth. The founder of this house is Helga Hufflepuff.
Ravenclaw - values intelligence, creativity, learning, and wit.[HP5][HP7] The house mascot is an eagle, and the house colours are blue and bronze (blue and grey in the films). The head of this house is the Charms professor, Filius Flitwick, and the house ghost is The Grey Lady. According to Rowling, Ravenclaw corresponds roughly to the element of air. The founder of this house is Rowena Ravenclaw.
Slytherin house - values ambition, cunning, leadership and resourcefulness and most of all Pure wizard blood. Slytherins tend to be Pure-bloods or Half-bloods who believe in the supremacy of pure wizard blood; Muggle-borns, vulgarly known as "Mudbloods," are less commonly found in Slytherin than in other houses. The house mascot of Slytherin is the serpent, and the house colours are green and silver. Salazar Slytherin founded the house. The Head of House is Severus Snape.
Shorter versions (as czar says too)
Gryffindor - daredevil mofuckas
Slytherin - assholes
Hufflepuff - pussies
Ravenclaw - smartasses