The phrase "renovation work" is correct and can be used in written English.
For example, you might say, "The old house has been undergoing extensive renovation work for the past few months."
The renovation work took almost two months.
Renovation work is under way inside.
As a result, renovation work for the restaurant began.
It was about that time that the renovation work on Mr. Kerik's apartment began.
"These historic properties require a lot of renovation work and constant maintenance".
Unlike past summers, however, the island will be closed on Fridays, because of the renovation work.
I would add: awareness that the columnist's political home is in need of some renovation work.
The Empire State Building, for example, is 82 and doing just fine after major renovation work.
Then, in 2001, the bells were turned off during renovation work.
The orchestra will not play at Carnegie until the following year because of renovation work.
Rodriguez returned to the demolition and renovation work he has done ever since.
