Green’s Dictionary of Slang

reno n.

(US) renovation, thus v. reno, to renovate .

[Aus]G. Gilmore Base Nature [ebook] The renos were first-class, the woodwork on the veranda faultless, the paintwork too.
[US]S.M. Jones Lives Laid Away [ebook] One house left to reno and flip.
[Aus]J. Lambert 22 Sept. [personal comm.] [W]e are getting the upstairs apartment rennoed.