"This is an unprecedented and very generous grant."
It will enable Aratoi to develop a "major partnership" with Ngati Kahungunu this year during their Treaty settlement negotiations.
Netball Wairarapa spokesman Luther Toloa said Wairarapa's netball community deserved a top-level facility at Colombo Rd, and this year received $218,000 towards that goal.
"We want to future-proof our facility for the next 30 years.
"We want to give the region a facility to give them the ability to bid for national, international games," he said.
"The grant is a substantial gift, an acknowledgement the facility does indeed need upgrading.
"Netball deserves it, the community deserves it."
Destination Wairarapa received $242,000.
South Wairarapa Mayor Adrienne Staples praised Trust House for its support towards Martinborough's community hub, the Wahinga Centre, and thanked it for helping the Featherston Menz Shed.
The council received $150,000 towards the hub, while the Menz Shed, which was donated a former bottle-store building, got $35,000.
Prue Smith, manager of the Wairarapa Teen Parenting Unit, spoke of the "generous" $23,000 grant from Trust House which had enabled each of its 25 young mothers to get a laptop for their studies.
Wairarapa Bush chief executive Tony Hargood spoke of the help received for the $2.15 million Memorial Park upgrade, including the lights and artificial turf.
They received $105,000.
Trustee Ray Southey said Trust House was a "value added" organisation.
The trust, which administers hospitality venues and rental properties, pays out $7 million in wages each year and spends $10 million on goods and services from the community.