Construction Industry Development Board
CIDB contractor grading and NHBRC registration for builders
The Construction Industry Development Board keeps the register of contractors that public sector clients must use, grading each contractor from 1 to 9 by financial and works capability in each class of work. Home builders register separately with the NHBRC and enrol each new home. Omni Field keeps the project and cost records both registrations draw on.
Checked 2026-09-09 against Construction Industry Development Board, register of contractors. Updated 2026-09-09. Not legal advice.
What the grades mean
The Construction Industry Development Board Act established a register of contractors, and organs of state may only award construction contracts to contractors on it. Each contractor is graded from 1 to 9 in one or more classes of work, such as general building, civil engineering, electrical or mechanical, and the grade sets the maximum value of a single public contract the contractor may tender for. Grade 1 has no financial requirement; higher grades are assessed on financial capability and on the largest completed contracts.
A grade is renewed periodically and can be raised on evidence of completed work and financial standing, which is why keeping clean records of every project, its value and its completion is the path to bigger tenders.
NHBRC for home builders
The National Home Builders Registration Council registers home builders under the Housing Consumers Protection Measures Act, and a builder must be registered before building a home for sale or for a client, and must enrol each new home with the Council before construction starts. Enrolment funds the warranty scheme that protects the buyer against structural defects, and a home that was not enrolled cannot be bonded by most banks.
The two registrations are separate: a builder doing public works and private homes may need both, each with its own renewal and its own records.
What the records need to show
A grading application and a tender both ask for the same evidence: completed contracts with values, dates and client references, the people and their qualifications, the plant, and the health and safety record. A contractor who tracks each project as a project, with its phases, its costs and its sign-offs, has that evidence as a report rather than a reconstruction.
Fees, thresholds per grade and the application process are set by the Board and change; take the current figures from its website rather than from any summary.
What Omni Field does about this
- Each contract runs as a multi-phase project with milestones, crews and budget against the jobs that make it up, so contract value and completion dates are on record for the next grading application. Multi-Phase Project Management
- The team's trade qualifications and safety appointments sit in the certification register with expiry alerts. Team Certification Management
- Site attendance, daily site records and photographs are captured on the phone against the project. Mobile Field Service App
Questions
Sources
- Construction Industry Development Board, register of contractors (checked 2026-09-09)
- National Home Builders Registration Council (checked 2026-09-09)