How to Compare Building Contractors

The lowest total is not automatically the best quotation. A reliable comparison looks at whether contractors priced the same scope, understood the site, explained exclusions and provided a workable sequence. Use this guide before appointing a contractor for renovations, extensions or new building work.

Create a common tender brief

• Give each contractor the same drawings, photographs, specification and list of required work.
• Record assumptions and unresolved selections.
• Set a closing date for questions so clarifications can be shared consistently.
• Ask for a written quotation rather than relying on a verbal total.

Check what the quotation includes

• Look for site establishment, protection, demolition, rubble removal and final cleaning.
• Check labour, materials, specialist trades, transport and equipment.
• Identify provisional allowances and items excluded from the price.
• Confirm whether taxes, delivery charges and waste disposal are included where applicable.

Assess capability and communication

• Ask about comparable projects, current workload and who supervises the site.
• Request references that relate to similar work rather than only general testimonials.
• Discuss how progress, delays, variations and quality concerns will be recorded.
• Confirm who has authority to approve changes on both sides.

Agree commercial controls

• Link payments to clear stages or verified progress rather than vague dates.
• Keep a written record of approved variations and their effect on price and time.
• Clarify responsibility for owner-supplied items and late selections.
• Do not leave warranties, defects and final handover discussions until the end of the project.

Frequently asked questions