Edwin and Charles' Apartment

The apartment seen in nearly every episode was the home of Edwin Higginbotham, Charles Francis Delafontaine, Carson The Cat, Nelson The Cat and Professor Cushion until sometime in between seasons 3 and 4 when Carson bit the water pipe again, this time flooding the entire apartment for good.

The gang, with great sadness, abandoned their beloved apartment, and went to live in a new one which is the one seen in Season 4.

History
When Edwin and Charles graduated from Cambridge University, they decided to be flatmates. Edwin found a middle-class apartment for sale at £145.000. Edwin bought it using a lot of money his wealthy family left him, and they both moved into it.

This is the birthplace of Professor Cushion.

Sadly, the apartment met it's end when Carson bit the water pipe a second time, this time flooding and ruining the whole apartment. Since the builders of the estate apparently couldn't do anything about it, the elegant gang were forced to abandon their beloved home and move into a new apartment.

Trivia

 * It is unknown if they have neighbours.
 * It was once taken over by Coffy Leland and his Tramp Squad, but only for 6 hours, due to Edwin and Charles calling the police to arrest them.
 * The apartment was destroyed sometime in between seasons 3 and 4 by Carson, possibly trying to "recreate Noah's Ark" a second time.
 * The outside of the house is never seen, but a cartoon version of the outside appears in transitions with the song "Bananaphone" playing in the background.