Wordsworth House in Cockermouth has won £20,000 in funding through a national vote.
The funding will be put towards renovating the grounds after it was damaged in the November 2009 floods.
The money was part of £100,000 donated by Bovril to the National Trust to help restore special outdoor areas across the country.
Wordsworth House was one of five successful sites that received a share, scooping 1,944 public votes.
The grounds were badly damaged during the floods.
The oak gates were ripped off and walls and terraces were demolished.
The £20,000 will be used to renovate the gardens, with the replanting of the terrace and the building of a summer house.
A completion date is expected in the summer.
Gardener Amanda Thackeray said: "Fifteen months after the flood, there is still a huge amount of work to be done.
"Thanks to everyone who voted for us, we'll be able to complete the restoration and make William's childhood garden even lovelier than before."