1. 15 – 20 % Savings on project. If you build a house for R 2,000,000 you can save up to R 300,000 - 400,000 by using a QS. If you do not use a bill of quantities you cannot have competitive quoting on the same standard of products for installation. Cost price items such as light fittings, sanitary fittings, bbq’s/braai, etc. can vary a lot with price & quality and I saved the client R 100,000 on one project. If there is any variations, you can quote them according to the bill of quantities. No bill of quantities means the contractor can ask you whatever price he wants. How will you know that he is not overcharging you? 2. Project finish on time. If there are scope changes (you need to build and extra bathroom) that does not fall on the critical path (the longest time it takes to complete the project) you don’t have to pay for extra overhead costs.The extra costs have a 10-15 % effect of the total project cost and impact on your adjusted contract price. Is there a p...