The primary purpose of Estimating and Costing is the preparation for submission of a project according to Administrative Approval and Technical Sanction.The various elements of engineering involved in it viz. planning, preparing bill of quantities and abstracts of cost, drawing and detailing (specially at the actual construction stage) and organisation of labour and material with a view to provide a durable structure most economically. Keeping this in mind all topics related to and interrelated to any type of project is dealt in detail in this book. While preparing the content matter due consideration is given to the present the subject matter in clear and practical manner as per practices and B.S.I. Specifications.This book will serve its purpose for the students of Degree, Diploma, A.M.I.E. and other professional and practising engineers. We sincerely hope that this book will serve its purpose and we look forward for critical comments, suggestions to improve the subject matter in next editions.