No, the lumber must be grade stamped in accordance with the National Building Code of Canada which requires adherence to “CSA-O141 Softwood Lumber” where it states:

  • The lumber is graded in accordance with grading rules approved by CLSAB.
  • The lumber is inspected and identified in accordance with the Regulations of CLSAB.

However, homeowners or builders that want to build a structure with lumber that they have personally milled or purchased that is not grade stamped can contact and make arrangements with a CLSAB Accredited Agency ( for the Agency to grade and stamp every piece of lumber to be used in the structure that satisfies the required NLGA grade.