The homes in School Close, Steventon, are among the first of 56 homes in Oxfordshire that are scheduled to have works carried out in the coming weeks.
The improvements include external wall insulation, and heating improvements, such as upgrading gas central heating or installing air source heat pumps.
Sovereign is spending £3 million on carrying out physical improvements to more than 300 homes across its operating area in the South and South West of England this winter. This figure is over and above its planned maintenance programme.