The contract will now run until 2020, at least.
Osborne took over responsibility for repairs, maintenance and asset management projects for the council’s stock of 10,500 homes in July last year. It says that it is on course to save the council £1.1m by April 2016.
The Hertfordshire authority includes the towns of Hemel Hempstead, Berkhamsted and Tring.
Osborne Property Services managing director Nick Sterling said: “The team worked really hard during the two-month contract mobilisation to ensure we hit the ground running from 1st July 2014. I am delighted that this effort working in partnership with Dacorum Borough Council has yielded such excellent results for the council and, most importantly, for its tenants.”
Rose Kosmalski, chair of the tenant and leaseholder committee and a council tenant, said: “While working with Osborne and the council in this partnership we have found both parties to be passionate, willing to listen and most importantly flexible, where possible, to meet our needs. We feel we are on the road to a very successful partnership.”