All Houses do. :) And then you have mutts like Capri... half-Tamrani, half-Bartomn-with-a-bit-of-L'Arath... she has the Tamrani height and build, but the Bartomn hair, eyes... and the traditional powers of both Houses.
Tamrani are the smallest of the Dasaroi. They tend towards fair hair, blonde to light brown, wavy to curly; their eyes are unusually large and tend to be grey, but change color. See Julia, in icon.
L'Arathi tend to be tall and slender, with hair color ranging from brown to auburn to, rarely, strawberry blonde, usually wavy. Their eyes are a distinctive grey-green - light grey with encircling deep green, though the rest of the iris can also flush with green. Shayaran L'Arathi tend to be fey and otherworldly - a deliberate affectation. They are also very volatile emotionally.
Lhri'nahri of both genders tend to be tall and slender - bird-boned, if you will. Black hair, usually worn long, and eyes of amber-gold to deep brown, infrequently grey.
Bartomni are ursine - bearlike. They tend to be medium-to-tall and sturdy; blue-eyed brunettes and redheads, for the most part. They're also the House that tends most toward curly hair.
Narsani tend to be short to medium height. You won't find a six-foot-tall Narsani! Hair tends to be light to dark brown; eyes tend towards blue, but hazel is also common.
Ziroth: Thin, with dark, straight hair. Black, black, black; this House is Goth As Fuck. A severe sort of beauty.
As House Tarak was not one of the original Great Houses, their physical type is not as well defined as that of the other Houses. Taraki tend toward a quieter beauty, one that can fade into the woodwork and observe; they tend to be slim, graceful brunettes, brown- or grey-eyed.