House of Echoes by Barbara Erskine

When Joss Gram inherits Belheddon Hall in Essex from a mother she never knew, she and her husband, Luke, move in with their young son, Tom. All Joss knows of the house is that her two young brothers died there many years ago, but local townspeople whisper darkly of a curse on both the house and Joss’s family.
Something is definitely wrong at Belheddon Hall: the laughter of young boys echoes through its rooms; Tom goes into hysterics at the sight of a “tin man”; a ghostly voice whispers, “Katherine”; and white roses are found mysteriously strewn through the house.