Which details give the Radley residence a haunted-house atmosphere?

"The Radley Place jutted into a sharp curve beyond our house. Walking south, one faced its porch; the sidewalk turned and ran beside the lot. The house was low, was once white with a deep front porch and green shutters, but had long ago darkened to the color of the slate-gray yard around it. Rain-rotted shingles drooped over the eaves of the veranda; oak trees kept the sun away. The remains of a picket drunkenly guarded the front yard "swept" yard that was never swept-where johnson grass and rabbit-tobacco grew in abundance."

"The shutters and doors of the Radley house were closed on Sundays, another thing alien to Maycomb's ways: closed doors meant illness and cold weather only."

"The old house was the same, droopy and sick, but as we stared down the street we thought we saw an inside shutter move. Flick. A tiny, almost invisible movement, and the house was still."