Bill of Quantities: Detailed Cost Report

As a construction professional, you must clearly understand your project costs. This is where a Bill of Quantities (BOQ) report, also known as an Elemental Cost Report, comes in. A well-prepared BOQ is a detailed list of all items required for your construction project, including materials, labour, plant, and equipment costs.

A cost estimate gives a general project schedule and cost projections, but a BOQ report is a more detailed document and provides exact measurements of what’s required.

Having a BOQ report ready before construction starts is critical as it ensures the project runs smoothly, stays within budget, and manages cash flow.

Why Accurate BOQ Reports Matter in a Construction Project

Inaccurate cost estimates are responsible for the majority of construction project overruns. This shows how important a BOQ is to your project. An accurate BOQ report gives you:

1. Clarity on project scope: A detailed BOQ gives you a clear understanding of the full scope of work and the costs involved.
2. Payment evaluations: The BOQ helps all parties with interim payment evaluations so everyone gets paid for the work done.
3. Procurement planning: The report tells you what needs to be procured and at what stage of the project logistics management needs to be done.
4. Accurate cost estimates: A thorough BOQ allows for exact cost estimates of all project costs, including associated costs, minimising unexpected expenses.
5. Cash flow management: The BOQ provides a detailed cost breakdown, helping you better manage the project’s cash flow.
6. Cost control: A well-constructed BOQ facilitates cost control by providing accurate cost forecasting and budgeting, offering visibility into upcoming expenses, and helping identify the most costly items to ensure the budget is respected.

What’s in a BOQ?

A BOQ provides a breakdown of all the work, materials, and labour required for a construction project. It typically has the following components:

1. Preliminaries: This section covers the general project requirements, site establishment, temporary works, and insurances.
2. Measured Works: This is the main body of the BOQ, listing all the items of work, quantities, and units of measurement. It’s usually divided into different trades or work sections.
3. Provisional Sums: These are allowances for work that can’t be quantified at the tender stage, such as specialist equipment or unknown ground conditions.
4. Prime Cost Sums: These are allowances for items supplied by the client or nominated subcontractors, such as kitchen appliances or specialist finishes.
5. Daywork Schedules: This section is for pricing labour, materials, and plant on a time basis for work that may be instructed during the contract.

Benefits of a BOQ

Using a BOQ in your construction project has many benefits:

• Better budgeting: A full BOQ allows for detailed financial planning and diminishes the risk of cost blowouts or budget overruns by providing a clear breakdown of construction costs, including the manufacturing and delivery of materials, plant, labour, and other associated costs.
• Improved tender comparisons: All tenderers are pricing the same quantities, so it’s easier to compare tenders on a level playing field.
• Standardised tendering process: A BOQ standardises and simplifies the process, making pricing more precise and project costs more predictable. It facilitates tender analysis and provides a foundation for contracts, contributing to efficient planning, scheduling, communication, accountability, and cost control.
• Reduced risk of disputes: The detail in a BOQ reduces the opportunity for misunderstandings or disputes between the client and contractor.
• Easier variations: If changes are required during the project, the BOQ will provide a basis for valuing those variations.
• Cash flow forecasting: The BOQ can be used to forecast the project cash flow.

BOQ vs BOM

How a Bill of Quantities (BOQ) differs from a Bill of Materials (BOM) is in the context of managing construction projects. A BOQ lists the quantities of work with a combined labour and materials rate, while a BOM lists each material item required for the project.

Bill of Quantities	Bill of Materials
Used for contract management and tendering	Used for getting materials and resource planning
Prepared by quantity surveyors	Prepared by suppliers or contractors
Lists quantities of work with combined labour and materials rate	Lists each individual material required

How Duo QS Prepares Your BOQ Cost Estimate

At Duo QS, our construction cost estimators prepare cost reports based on exact measurements and pricing from the project drawings and specifications. We list all the materials, equipment, and labour required for the project.

Our detailed cost analysis and BOQ can give you the following:

• Clarity on the full scope of work and costs
• Payment evaluations
• When specific materials and equipment are required at each stage of the project
• Easier cash flow management

We also include construction risk contingencies, tenders, and other project-specific items.

Why Choose Duo QS for your BOQ in the Tendering Process?

Each BOQ is project-specific, so having an experienced construction cost estimator with industry knowledge, like a quantity surveyor, is crucial for material and labour costs.

At Duo QS, our estimators document every item in your construction project, giving you a valuable tool for estimating project costs. Beyond a cost report (BOQ), we offer a full cost estimating and planning system.

We also help architects compare costs for different construction systems. With years of experience and attention to detail, we are your one-stop shop for all your BOQ needs.

Get Your BOQ Today

Whether you’re building commercial, renovating residential, or embarking on big construction projects, Duo QS’s services are customised to your needs. We provide accurate, detailed, and reliable cost estimates so your project runs smoothly.

Contact Duo QS today to learn more about our services and how we can help with your construction project.

FAQs

How long does it take to produce a BOQ?

The time it takes to produce a BOQ depends on a project’s size and complexity. For a small to medium project, it can take a few days to a couple of weeks. For larger projects, it may take several weeks or even months. We aim to produce accurate and detailed BOQs in the shortest time possible here in Duo QS.

Can a BOQ be updated?

Yes, a BOQ can be updated if the project scope or design changes or if new information becomes available that affects the project costs.

What are the benefits of a BOQ?

A BOQ gives you:

• A clear understanding of the work involved in the project
• Interim payment evaluations for all parties
• Clarification on what needs to be procured at each project stage
• Accurate cost estimates for the project
• Project cash flow management

How are BOQs prepared?

A quantity surveyor or experienced estimator uses special software to measure the construction plans. Once measured, material and labour items are compiled into sequenced folders that relate to the total bill or estimate.