Cost overruns are one of the most common and frustrating challenges in construction projects. Whether it is a residential build, refurbishment, or commercial development, going over budget can create financial strain, delay timelines, and even jeopardies the success of the entire project. Many property owners and contractors underestimate how quickly small cost issues can escalate into significant overruns. In most cases, cost overruns are not caused by a single mistake but by a combination of poor planning, inaccurate estimates, unexpected changes, and a lack of financial control. The good news is that these issues are largely preventable with the right processes and professional support in place. This article explores why cost overruns happen in construction and, more importantly, how to prevent them. You will also learn how working with an experienced quantity surveyor can help keep your project financially secure from start to finish. What Is a Construction Cost Overrun? A construc...