CIOB Diploma in Site Supervisory Construction Site Supervisory Live Online Course Start Date: Enroll Now Course Period: 1 Year (Part-Time) Cost: £1,296. Monthly Direct Debit Payment Plan: £216 upfront fee and £134 x 12 months (Starting from Month 1 to Month 12 inclusive). Study that Fits your Schedule Introduction Ultimately, a Site Supervisor is responsible for the health and safety of everybody