Goofs

Otho's shoes when he is spraypainting the walls in the house change from red elf-looking shoes to white sneakers as he walks through the bathroom, and then they change back to the red elf shoes as he enters the next room.

Otho opens a can of spraypaint and hands it to Delia, who opens it again.

In the opening scene where the spider climbs over the model of the Maitlands' house, Adam picks up this rather large spider with very large blackish body. When Adam is gently tossing the spider out the window, it is a much smaller spider and not the same kind.

When the Maitlands are in the model of the cemetery, there is fake green grass. When they return to full size and look down at the model, the cemetery is covered with sand, not fake grass.

When Beetlejuice switches his number with the witch doctor, he drops his number on his lap and it falls between his legs. Then when he picks it up, it's to the left of his legs.

All the people in the waiting room and in the office are in the same condition as when they died and the way they died is shown clearly. However, the Maitlands, who were drowned, are not wet. This was an artistic decision so that the actors would not have to constantly wear wet clothing.

Adam and Barbara attempt to scare the Deetz's by altering their appearances, only to find that the living cannot normally see the deceased. Later, when they show Juno how they plan on scaring the family again, they go back to altering their bodies, which Juno finds no flaw in.

However, she told them to study the "intermediate interface chapter on haunting" and to practice which, given the shrimp scene, they obviously had been doing.

When Otho, Charles and the two movers remove the model from the attic, the layout is much wider than the doorway. If they turned it sideways to get it out many of the buildings and other things, such as the pickup truck, would fall off.

Looking into the mirror, the ghosts prove that they have no reflections, but are later reflected in the attic windows.

When Beetlejuice rises from his grave and flies after the Maitlands, the wires supporting him are visible.

As the Maitlands are climbing the steps of the remodeled house with Juno, the cast's tape mark is visible on the step.

When the Maitlands' car drops into the river after the crash, the vehicle has no side or back windows.

When Adam, Barbara, and Juno walk into the remodeled house's attic together and Juno says "you should have been studying those lessons since day one", her lips don't move.

When Beetlejuice disrupts the séance, the wires holding up Barbara and Adam are clearly visible over the green-lit backdrop.

When Beetlejuice first appears to land in front of the Maitlands after escaping the graveyard, cables can been seen attached to his hips.

Right after the Maitland's car falls into the river, a rope tied to the bumper can be seen.

When Lydia is writing her note and pulls off the top sheet you can briefly see the same wording "I am alone" in pen in a new section of the paper.