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Estimator's Pocket Book: A Practical Guide for Cost Estimating

If you are looking for a concise and practical reference that covers the main pricing approaches for cost estimating, you may want to download the Estimator's Pocket Book. This book is written by Duncan Cartlidge, a Fellow of the Royal Institution of Chartered Surveyors with more than 25 years of experience in construction. It is fully up-to-date with NRM2 throughout, features a look ahead to NRM3 and describes the implications of BIM for estimators.

The Estimator's Pocket Book includes instructions on how to handle:

the NRM order of cost estimate;

unit-rate pricing for different trades;

pro-rata pricing and dayworks;

builders' quantities;

approximate quantities.

Worked examples show how each of these techniques should be carried out in clear, easy-to-follow steps. This is the indispensable estimating reference for all quantity surveyors, cost managers, project managers and anybody else with estimating responsibilities. Particular attention is given to NRM2, but the overall focus is on the core estimating skills needed in practice.

Updates to this edition include a greater reference to BIM, an update on the current state of the construction industry as well as up-to-date wage rates, legislative changes and guidance notes.

You can download the Estimator's Pocket Book in PDF format from various online sources[^1^] [^2^] [^3^]. However, we recommend that you purchase the book from the official publisher or a reputable bookstore to support the author and get the latest edition.

In this article, we will review some of the main topics covered in the Estimator's Pocket Book and provide some tips and insights for cost estimating.

The NRM order of cost estimate

The NRM order of cost estimate is a method of estimating the cost of a project at an early stage, before detailed design and tendering. It is based on the New Rules of Measurement (NRM), which are a set of standards for measuring, costing and procuring construction works. The NRM order of cost estimate consists of four levels:

Level 1: Elemental cost plan;

Level 2: Elemental cost plan with sub-elements;

Level 3: Elemental cost plan with sub-elements and components;

Level 4: Elemental cost plan with sub-elements, components and resources.

The level of detail and accuracy of the estimate depends on the stage of the project and the availability of information. The Estimator's Pocket Book provides a step-by-step guide on how to prepare an NRM order of cost estimate, including how to apply cost allowances, contingencies, inflation, fees and risk analysis.

Unit-rate pricing for different trades

Unit-rate pricing is a method of estimating the cost of a project by applying unit rates to the quantities of work required for each trade or activity. Unit rates are the prices per unit of measurement (such as m2, m3, kg, hour, etc.) for performing a specific task or supplying a specific material. Unit rates can be derived from various sources, such as historical data, market research, bills of quantities, schedules of rates or contractor quotations.

The Estimator's Pocket Book explains how to calculate unit rates for different trades, such as earthworks, concrete, brickwork, carpentry, roofing, plastering, painting, plumbing, electrical and mechanical services. It also shows how to adjust unit rates for factors such as location, complexity, quality, productivity and overheads. aa16f39245