There are 850 members nationwide.
NorthTec academic manager of trades and technology Adele McLean described the partnership as "win-win".
For the past 10 years, NZIOB has awarded four $500 scholarships annually to NorthTec students.
NZIOB's overseeing and liaison role between the industry, tutors and students has helped NorthTec get accreditation to deliver qualifications that in turn benefited the building industry, Ms McLean says.
Related courses range from a diploma in architectural technology to national certificates in carpentry and electrical engineering.
Ms McLean, who is also a NZIOB Northland board member, says two new diploma courses are planned: construction management and quantity surveying.
A new memorandum of understanding now allows students studying building-related subjects to become members of the NZIOB at a reduced rate, easing their access to networking, innovation sharing and industry "ins" as well as giving the Northland branch a healthy membership.
But even without the student factor, Northland was punching above its weight as far as membership numbers went, Mr Griffiths said.