The singer-turned-TV star was not at her villa in Estepona, on the east coast of the country, when it was devastated by a blaze earlier this month.
Black has since jetted out to the city to deal with the repairs, and admits she is glad she was not in the house when the blaze broke out.
She said: "All the hedges have gone at the front of the house. A good Samaritan - a neighbour opposite - saw these flames at three o'clock in the morning.
"I have management over there and a gardener, but I could've been in the house when it happened. It frightens me."