1) What a Unit Price Is
A unit price states the cost of one unit of work under defined material, labour, and overhead assumptions. Official sets give a common language for estimates, but they are not a direct market price. Always read the item description and confirm which published version applies to your contract date.
2) Official Price vs Private Quote
Brand, site access, schedule, subcontract structure, overhead, and payment terms all move a private quote away from the official figure. A difference is not wrong in itself; the reason must be explainable. Very low items may hide missing scope.
3) Reading the Bill of Quantities
Check quantities first, then item descriptions. Look for lump-sum lines with undefined content, scaffolding and temporary works, and excavation volumes that match the soil report. Ask every bidder to price the same quantity schedule.
4) Price Escalation and Duration
On longer jobs, define whether an escalation clause applies, which index it uses, and which items it covers. Fixed lump-sum contracts shift risk to the contractor, who prices in a safety margin; measured contracts pay for what is built.
5) Limits in Restoration
Standard items often fall short for heritage work: lime mortars, trial panels, material analysis, element-by-element timber repair, and skilled craft labour usually need custom analysis. See the historic building restoration cost guide and our restoration services.
6) Comparing Bids Fairly
Use one specification and one quantity schedule, confirm inclusions and exclusions in writing, and score references, team, programme, and guarantees alongside price. Ask for explanations of unusually low offers.
7) Common Reading Mistakes
Mixing units, ignoring lump-sum content, leaving VAT and overhead unclear, comparing different price-set dates, and failing to update the quantities after design changes are the usual errors.
8) Conclusion
Read unit prices together with scope, quantities, and risk clauses. For bid review or budget framing, contact us; our consultancy and construction teams can help.