The Dixon St toilets in Masterton's Queen Elizabeth Park should be demolished before Christmas, although the fate of the rose arbour is still unknown.
A new toilet and the historic pissoir near the Dixon St block were officially opened to public earlier this month.
Masterton District Councillors agreed to thedemolition of the old facility at a policy and finance committee meeting on Tuesday.
Two single-pan Exeloo units have been installed in the park and in Kuripuni, at a cost of around $176,000.
The pissoir was restored at an estimated cost of $48,500 but came in about 20 per cent under budget with help from the community. It was installed near the new park toilet.