The Wattersons' house

The Wattersons' House is a major location in The Amazing World of Gumball. It is, as the name implies, where the Wattersons reside.

Episode Appearences
The Wattersons' House has appeared in nearly every episode of The Amazing World of Gumball. The only episodes so far that do not feature the house at all are "The Pressure", "The Mystery", "The Picnic", "The Sock", "The Flower", "The Apology" and "The Words".

Kitchen
The kitchen has a checkered floor, a screen door leading to the backyard, and a fridge with two cereal boxes on top of it, visible in "The Prank". The sink also has a garbage disposal large enough to put a DVD in, as shown in "The DVD". It has cabinets and brown and white cupboards.

Living Room
The living room has a plaid brown sofa and a TV. It sometimes has either trash or laundry laying near or under the couch in some episodes. There are also two pictures near the front door - one of the Wattersons and the other of a unicorn, a table in front of the couch, a red and white rug, and stairs that lead to the upstairs hallway.

The Dining Room
The dining room is merged with the living room. As it is a dining room, it includes a table, and a door leading to the kitchen. Located in this room are paintings of a sad bunny clown and two strange looking white horses galloping.

Gumball and Darwin's Room
This is the room where Gumball and Darwin sleep. Darwin sleeps in the fishbowl next to the bunk bed, while Gumball sleeps in the bunk bed. Also in the room is a desk with a computer, along with posters, flags, and many other possessions of the children. The room is usually really messy, which is rather typical of Gumball and Darwin of course.

Anais' Room
Anais' room was first shown in "The Date". Not much was shown except a table, jungle green walls, a poster of a horse, some dolls and a toy chest with a baseball glove on it.

The Attic
The Attic made its appearances in "The Poltergeist", "The Wand", "The Car", and "The Treasure". It is rather cluttered up and a bit dusty.

Nicole and Richard's Room
Nicole and Richard's room has so far only appeared in "The Dress", "The Poltergeist", "The Car", and "The Treasure".

Trivia

 * This house is located on 1026 York Street, Vallejo, California, USA.
 * Gumball and Darwin's room is right of the stairs, yet their window is shown in the front of the house. Even stranger, in The Poltergeist and The Car, this window is part of the attic.
 * They have a lot of unicorn paintings in the house.
 * Gumball and Darwin have a game system in their living room, seemingly a combination of an SNES/SFC (controller) and Xbox 360 (shape and disc loading).
 * They also have a record player in their house. And in Gumball's room, they have a 1985 Commodore Amiga 1000 looking computer.
 * The Wattersons' mailbox has a little black face on the door.
 * The Wattersons' TV is made by a company called "Soppy," which seems to be a parody of Sony. The real life TV set seems to be a 1979 IRRADIO (SALORA SCANMATIC 1E4)
 * The house has a chimney but so far there is little evidence of it being used as a fireplace, unless the TV is blocking it and it's no longer in use.
 * In the real life shots, The Robinsons' House is on the left side. In the shot of the house on the show, The Robinsons' House is on the right side.
 * In an early production image, the house has eyes and a red awning over the porch with teeth. When asked if the house is alive, James Lamont replied "Everything in Elmore is alive".
 * Gumball's room has a flag for a team called the "Ducks Dodgers", likely a reference to the titular character from the cartoon "Duck Dodgers".
 * One of the promos for the show reveals a tire swing in the backyard, but it has not yet appeared in any of the episodes.