Northland Quarrying Institute chairman Murray Smith, of Kamo, said the region had several quarries producing top-grade rock, but variable soils made road construction an engineering challenge.
Northland Chamber of Commerce CEO Tony Collins said conferences brought cash into the city and if Whangarei had the infrastructure it could attract more of them.
While Forum North had a theatre and exhibition rooms suitable for the quarrying conference, there were constraints on using the ASB Stadium as a dinner venue for 350 people.
Whangarei needed good roads to bring visitors into the region, quality accommodation and a good place for conferences, ideally a fit-for-purpose venue able to seat 500 for dinner.
An international conference centre planned in Auckland would be able to seat up to 3000 and Northland would be vying with the Waikato and Bay of Plenty for mini conferences spinning off Auckland events.
Providing attractions for delegates' partners was a key factor in luring conferences north, Mr Collins said.