Mertle's house, also known as the Edmonds residence, is where Mertle Edmonds and her mother live in the Lilo & Stitch franchise, appearing in several episodes of Lilo & Stitch: The Series. Lilo and Stitch often visit Mertle to ask her to do stuff with them, but Mertle usually just declines their offer and insults them instead.
In the series episode "Clip", Lilo and Stitch sneak in and plant the episode's titular experiment in Mertle's bedroom in hopes of having Clip eat Mertle's hair. It backfires when Gantu tried to grab the experiment by sticking his arm through the bedroom window, causing her to flee. When Mertle's mother notices the racket in her daughter's room, she screamed at the sight of Gantu, and Clip ate her hair, causing the woman to faint in shock. Not to mention, Mertle wasn't even at her home the whole time; she was at a sleepover at Teresa's home.
In "Holio", Lilo and Stitch crash Mertle's birthday party in her backyard after she denied Lilo an invite. When Mertle activates Experiment 606 (Holio) in her bedroom, the experiment turns into a black hole that sucks up all the dolls in her room, then later sucks up the whole house except for the foundation and an oblivious Mrs. Edmonds. After Lilo and Stitch destroy the black hole, the house falls back into its place, and Holio returns all of Mertle's dolls to her.
In "Bonnie & Clyde", Lilo and Stitch TP Mertle's house, while their naughty behavior posed as a distraction for Bonnie and Clyde, enabling them to steal a trash can and a TV. However, Lilo and Stitch eventually do the right thing by handing Bonnie and Clyde over to the police and then cleaning up the toilet paper around Mertle's house.