The Haddock house on New Berk is at least two stories high. The bottom floor contains a large open space with a vaulted ceiling. There is a large hearth with a mantle on the back wall. There is an animal hide rug on the floor and various wooden furniture, some of which are draped with other furred hides.
The exterior is a stylized and rounded A-frame type house. There is a wooden porch with steps leading to the front door. The house is decorated and painted with dragon motifs as well as braid and diamond patterns.
The Haddock House is used by the Haddock family as means of shelter from the weather, a place to sleep, and store their items.
Inside the Haddock House, Hiccup tells his son, Nuffink, a story about dragons. He then exits the house, where his daughter, Zephyr, designed booby traps for dragons to protect the house. She then explains to her parents that she found the Dragon Manual, and learned the truth about dragons, that they are monsters. She then gets out of the house with her brother and begins building more traps.
Hiccup and Astrid make a fire just outside the house and discuss their children. Astrid comes with the idea of making a Snoggletog Pageant for the children and show them how Vikings and dragons lived together. Hiccup agrees and starts to work on the plan, while Zephyr and Nuffink test the booby traps.
After the Pageant, the Haddock family returns home, only to find a green glowing structure (made by Toothless and the Light Fury). They discover that the fish bowl they left for Toothless was empty, so they look outside, only to see Toothless and his family flying away in the night.
- The large house that's prominent during the wedding scene in the third film has both carved Night Fury and Deadly Nadder figurines on it, strongly suggesting it's meant to be Hiccup and Astrid's house now that they're married. The game School of Dragons shows the same house as an important building on New Berk, though has yet to confirm what its purpose is. So it's very possible this was meant to be the Haddock House on New Berk, but the Homecoming production team wasn't informed of this.