A construction project can begin with a carefully prepared budget and still end up costing considerably more than expected. For homeowners, property developers and contractors in London, this can be particularly frustrating. The initial figures may appear manageable, yet a series of overlooked expenses can gradually push the project beyond its financial limits. The problem is often not one enormous unexpected bill. Instead, budget pressure tends to come from several smaller costs that were not properly identified, measured or allowed for at the beginning. This is why effective construction cost planning is so important. Understanding the less obvious expenses before work starts allows you to establish a more realistic budget, make better decisions and reduce the risk of costly surprises. From professional fees and site logistics to design changes, temporary works and contractor variations, here are some of the hidden construction costs that can damage a project budget and how they...