With the exception of Palmer St, which the new owner plans to upgrade, the units have been re-insulated with modern materials to meet new legislative requirements.
All 129 units have been fitted with a heat pump and bathroom and kitchen extractor fans.
Security screens have been installed on the front and back doors and the exteriors of some villages have been repainted.
Locks have been upgraded to a master key system in case of emergencies.
To complete the upgrade programme, council will over the next five years install double glazing in all units beginning at Wallace Court in Cambridge during June.
Property manager John Miles said Waipā District Council has a strong commitment to pensioner housing with plans to build more units over the next three years.
The council continues to provide on-call support for tenants, as well as mow lawns and remove garden waste.
There are six-monthly smoke alarm checks and staff support tenants to liaise with government and health services.
Tenants pay independently-assessed market rents for the units — rents are not subsidised by ratepayers.
Under the council's policy, and after taking into account the government accommodation supplement, rents can be no greater than 30 per cent of the gross amount of National Superannuation.
Waipā's pensioner housing units are now only available to those aged 65 and over.
They continue to be in demand with more than 30 people currently on a waiting list to be housed.
