Give every bidder the same information
Three prices are only comparable if they describe substantially the same work. Issue the same drawings, specification and schedule to each contractor. Record the revision and tell everyone about clarifications. If one bidder prices a developed technical package and another prices an early planning drawing, the totals may measure different projects.
Set out who supplies each major item. Kitchens, sanitaryware, lighting, flooring and glazing are common sources of misunderstanding. Include installation, delivery, waste removal and making good where required. A product allowance should be identifiable rather than hidden inside a general sum.
Build a comparison schedule
Put the quotations side by side by work section. Add rows for exclusions, provisional sums, client-supplied items, VAT, programme and payment terms. Ask bidders to clarify gaps in writing. Avoid inserting your own assumed prices and then treating the adjusted total as a binding offer.
A provisional sum represents uncertainty that still needs resolving. It is not automatically a fixed price for a complete piece of work. Understand the basis on which it will be adjusted and make sure the project budget retains room for the unresolved scope.
Assess delivery as well as price
- Who will manage the site each day?
- What work will be subcontracted?
- Can the contractor explain comparable completed work?
- What insurance and contractual arrangements are proposed?
- How will variations be instructed and valued?
- How are inspections, testing and handover records allowed for?
- What assumptions support the start date and duration?
References are most useful when they relate to a similar building, access arrangement and level of complexity. Speak to clients about communication and the handling of changes, as well as the final appearance.
Decide what remains unresolved before signing
A low quotation may be a good offer, but it may also omit necessary work. Investigate the differences before choosing. Likewise, a high price does not itself demonstrate better quality. Ask for a clear contract scope, programme and payment mechanism, and obtain appropriate contract advice where needed.
We can help coordinate tender information and clarify architectural scope as part of an agreed appointment. Send us the drawings and quotations before you commit, with permission to review the documents. An organised comparison can make the appointment decision easier and reduce disputes about what was included.
Sources and useful references
Checked 18 October 2026. Confirm current requirements for your property and proposed work.
Test your idea before committing
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