The move comes after a string of construction companies, including Arrow and Ebert, collapsed.
Last year, NZ Specialist Trade Contractors Federation President Graham Burke said the whole construction sector system was "broken".
The new joint strategy – the Construction Sector Accord – identifies the most pressing areas of concern in the construction sector and sets out a strategy on how to fix them.
Or, as Reidy puts it: "this Accord provides a platform for change".
"The Accord recognises that the way the construction industry, its clients and Government have behaved in the past has created systemic problems that are having an impact on the New Zealand economy and the wellbeing of New Zealanders."
He said the new strategy commits those in the construction sector to change the way business is done.
"We're agreeing to uphold new standards of behaviour and to be held accountable if we don't.
"It commits those working in, and with, the industry to start treating each other differently, so we can replace the current adversarial culture with one based on respect, trust and shared responsibility," Reidy said.
Building and Construction Minister Jenny Salesa said the Government will be pulling its weight too by improving its procurement practices and its construction pipeline management.
"Industry representatives have identified the need for enhanced leadership and collaboration within the sector.
"Better alignment will support the other industry-led priority work areas of improving businesses performance and promoting a culture of trust between all parties in the construction eco-system."
Many different construction companies and groups, such as Downer, Watercare, Fonterra, Tonkin & Taylor, have signed up to the Accord.
New Zealand's construction sector employs 250,000 people and is the country's fourth-largest employer.
It accounts for 7 per cent of GDP and, in 2017, contributed nearly $15 billion to the economy
Reidy expects that figure to reach $41 billion in 2023.