Homestar Runner's House
From Homestar Runner Wiki
Exterior
In The Reddest Radish, and In Search of the Yello Dello, Homestar's House is cartoonish red hut with white spots, but in the Decemberween toons The Best Decemberween Ever and Homestar presents: Presents, his house is a normal suburban house with yellow siding. So, unless he's moved (or has more than one house), what the outside of Homestar's house really looks like remains a mystery.
Interior
We first saw the inside of his house in the email caper, when Strong Bad and The Cheat broke into it. It has since been seen in the email radio and Homestar presents: Presents. The living room has green walls and pictures of himself through the years. Homestar's white table with the sliding doors is similar to one sold by Ikea. It also has a cow lamp which The Cheat broke in caper, but it was repaired and seen again in radio.
Bedroom
Homestar's bedroom, first seen in Homestar presents: Presents, has maroon walls, a window, Homestar's bed (the mattress of which appears to be bare), and an alarm clock/radio labeled "Homestar's clock" on a dresser. Homestar's room is up a flight of stairs, so it's probably on the second floor.