A joint project between Certified Builders and Mitre 10 Mega will transform a car park into a building site for charity next year.
The two companies, with help from other Dunedin businesses, intend to raise money for the Otago Community Hospice.
The hospice asked Certified Builders earlier this year if it would do a project for the organisation.
"Everyone was quite keen to do something", Graeme Stevenson said.
It was agreed Mitre 10 Mega would provide the building materials, including the kitchen and bathroom, for the project at cost and Certified Builders would provide the labour for free.
Mr Stevenson said an approximate dollar value for a project such as this would be $150,000.
The project is set to start on February 22 in the Leviathan Hotel car park on Cumberland St.
Hotel owner Peter Laing suggested the site as an option and had also offered to provide meals and accommodation if required.
Mitre 10 Mega marketing manager Alison Beck described the car park as a "good central location" which would allow people to view progress.
"Dunedin has been wonderful. Everyone has banded together to help them," she said of support for the hospice.
It was hoped the 100sq m house would be built within three weekends, after which it would be auctioned by LJ Hooker.
Other businesses involved include: Tansley Electrical, Foley Plumbers, Ellisons Aluminium, Fulton Hogan, Radio Works Otago, McKenzie and Willis, Karen Musk, Steve Stewart Painters and Four Corners Property Ltd, ABN-Amro Craigs and ANZ.
Rotary houseA desire to enhance fellowship within their club while helping people in need spurred the Rotary Club of Mosgiel to build a home for charity.
Club members, many of whom were involved in trades, have spent the past four months building a three-bedroom transportable home to be sold in February, marketing co-ordinator Brian Miller said.
It was hoped $10,000 would go to the hospice, while Canteen and the Life Education Trust would also benefit.
Mr Miller said the hospice was "dear to the hearts" of many Rotary members.
"It's about people and the hospice affects most families and that was certainly one project that we really wanted to get involved with."
The public were invited to view the house on site at Doon St in Mosgiel.