Glossary

Construction estimating glossary for UK project teams

Plain-English definitions for common construction estimating, tendering and QS terms.

Illustration: a construction reference book surrounded by miniature building components
2 min read by QuotifyReviewed 9 October 2026.AI-generated editorial illustration.

Look up the term in the quote you are reviewing

The searchable construction glossary gives concise definitions, practical examples and related terms. Use it beside the estimate or client pack, then check any project-specific meaning in the tender and contract documents.

Often confusedWhat to compare
Estimate and fixed-price quoteThe purpose, scope and commitment attached to the number
PC sum and provisional sumA selected supply item versus work not fully defined
Mark-up and marginPercentage of cost versus percentage of selling price
Preliminaries and overhead and profitProject delivery cost versus business commercial recovery
Contingency and risk allowanceThe basis and intended coverage of the uncertainty carried

Carry the meaning into the client quote

If a term changes what the client is buying, add the scope, amount, adjustment basis and remaining decision. “Allowance included” is less useful than a defined supply allowance with installation and upgrade treatment stated.

Use the allowances guide for an example, and the price review checklist to check that the issued wording matches the approved internal basis.

A useful next step

Academy task

Follow the practical workflow

Use the relevant lesson while preparing, reviewing or issuing your own project.

Open the matching lesson

Put this into practice on your next project

Your first complete project is free, including the estimate, risk information, client reports and internal reports. Bring your drawings, specification and site notes, then review the working against how your business will deliver the job.

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