This guide outlines critical considerations for accurately estimating water damage mitigation costs. It emphasizes the importance of documenting revenue associated with cabinets and countertops during claims. The guide details the necessity of detaching or removing these items to facilitate effective mitigation. It also discusses the use of specialized equipment to enhance drying processes and maximize rental revenues. Additionally, the guide highlights the often-overlooked aspects of carpet cleaning and furnace maintenance, which can significantly impact the overall cost estimates. Safety measures, including the justification for personal protective equipment (PPE) and site protection, are also addressed. The guide presents a three-step bio wash process and stresses the importance of evaluating, inventorying, and packing contents digitally. It concludes with a focus on commonly missed line items in estimates, such as electrical components and appliance detachment, which can lead to incomplete charge-outs and lost revenue.