(Adds confirmation by Kuczynski's office of quotes)
LIMA, Dec 26 (Reuters) - Peru's economy will grow by 5 percent next year, not the 4.8 percent previously forecast by the government, President Pedro Pablo Kuczynski said in an interview with a local newspaper published on Monday.
"I don't believe in those forecasts that say we're going to grow 4.2 percent or 4.4 percent" next year, Kuczynski was quoted as saying in financial daily Gestion. "There'll be a reactivation of private investment here."
Kuczynski's office confirmed the accuracy of the quotes in the newspaper interview.
The central bank revised down its 2017 growth forecast to 4.3 percent, from 4.5 percent, last week as it trimmed its outlook for private spending in Peru, a global minerals exporter.
The economy grew by a weaker-than-expected 2.12 percent in October, compared with the year-earlier month, dragged down by a drop in government infrastructure spending that prompted a steep contraction in construction.
The president told Gestion that his government would help boost construction by building 40,000 homes for low-income households with the private sector.
Reporting by Mitra Taj; Editing by W Simon and Leslie Adler