The 45-year-old star, who got engaged to 'the Leftovers' star Theroux, 43, in 2012, said she can't wait to revamp his former bachelor pad in Manhattan, reported Contactmusic.
"It's what I love to do. It's a great outlet for me, a hobby if you will. I've got to get my hands on something because I can't sit still. I mean, I haven't done anything since June, for Christ's sake!"
The 'Horrible Bosses 2' star said she finds time to relax despite spending most of her time in renovating properties.
Anniston will be seen next in her comedy-drama film 'She's Funny That Way'.