To enter or open the Art Lover's House, you will need to have completed putting the work of art/painting together.
Please see the Related link below for a walkthrough of Art Lovers House.
Please see the Related link below for a walkthrough of Professor Layton's Puzzle Doctor's House.
Puzzle No 35: Which House Where, Professor Layton and Pandora's Box. Answer = A House is Green, B House is Blue, C House is Red, D House is Yellow.
You will find that The Tea Master's House in the Professor Layton's challenges will be open to you.
The Musician's house (must have taken 9 photographs and spotted all the differences), Please see the related link below for a walkthrough of the puzzle.
Puzzle No 147: Sliding Labyrinth, Location: Layton's Study - The Animal Lovers House. Please see the Related link below for a walkthrough of puzzle 147.
Professor Layton Bonuses. Please see the Related link below for a walkthrough of Unlocking Musicians House.
Puzzle No 7: Mopping Up in Professor Layton and the Spectre's Last Call. The puzzle is located in Clark Triton's house, Speak to Beth at the bottom of the house stairs.
How to Unlock all the Professor Layton Challenges. The Storyteller's House. You will need to have competed all the 3 picture books correctly. Please see the related link below.
You will get to open the Tea Master House in Professor Layton's challenges' Layton's Challenges (must have served tea to 26 thirsty people) Please see the Related link below
Professor Layton and Pandora's box. Please see the Related links below for a walkthrough of puzzle Sweethearts House.
Please see the Related link below for a walkthrough of all The Challenge Houses for Professor Layton's Pandora's Box. How do you unlock all of Layton's Challenges in Professor Layton and the Diabolical Box The Musician's house: You have got to have taken 9 photographs and spotted all the differences. The Tea Master's house: You must have served tea to 26 thirsty people. The Animal Lover's house: You have to give the Hamster a 30 step workout. The Sweetheart's House, You have to save after watching all of the credits. The Puzzle Doctor's House: You have got to solve at least 150 puzzles.
Professor Layton and the Spectre's Call, chasing the cat leads you to the forest and where the lost or missed puzzle house is located, then turn left and walk to the fish Laboratory.