Questions to Ask a Builder Before You Hire Them

A UK homeowner discussing plans with a builder on a building site, both looking at a sketch and measuring tape, in a suburban garden with tools nearby.

Why Asking the Right Questions Saves Time and Money

Hiring a builder without proper checks risks delays, poor work, and unexpected costs. In the UK, 1 in 4 home improvement projects exceed budget — often due to unclear expectations. Asking specific, practical questions upfront prevents this. Focus on insurance, payment structure, and project timing. These aren’t just formalities — they’re safeguards.

What to Ask About the Quote and Payment Stages

Always request a written, itemised quote. Ask:

  • Is this a fixed price or estimate?
  • Are materials, labour, and VAT included?
  • What happens if material prices rise?

Avoid builders who give vague quotes like "around £15,000". A proper quote should break down costs per task — e.g., "flooring: £2,100 (including underlay, fitting, removal)". This helps spot hidden charges.

For payment, insist on staged payments tied to milestones. Typical stages: - 10% on site start - 40% after structural work is complete - 40% after finishes (plumbing, electrics) - 10% on handover

Never pay more than 50% upfront. If a builder demands full payment, walk away.

Confirm Insurance, Licences, and Work History

Ask for proof of:

  • Public liability insurance (minimum £2 million recommended)
  • Employers’ liability insurance (if they have staff)
  • Trade-specific insurance (e.g., for scaffolding or asbestos work)

Check the builder’s registration with the FSB or NHBC. Ask for 3 recent references — contact them directly. Don’t accept vague answers like "they were happy". Ask: "Did the job finish on time? Were there cost overruns?".

If they’ve worked on similar projects — e.g., a loft conversion in a Victorian terrace — ask for photos and a short walkthrough. A builder who can show past work is more likely to deliver consistent results.

Clarify the Timeline and Work Schedule

Get a written project schedule with key dates:

  • Start date
  • Completion of structural phase
  • Fixtures and fittings installation
  • Final handover

Ask: "What happens if there’s a delay due to weather or material shortages?". A good builder will have a contingency plan — e.g., rescheduling non-weather-sensitive tasks.

Avoid those who promise "3 weeks from start" without a breakdown. Realistic timelines depend on project size. A kitchen extension might take 8–12 weeks, including planning, groundworks, and finishes. Push for a week-by-week outline.

Use ASKU to Find Trusted Local Builders

If you’re unsure where to start, use ASKU to connect with vetted local builders in your area. You can send a quick WhatsApp message with your project details and get a response within hours. It’s a direct way to compare quotes and check availability without the hassle of online forms.

Don’t skip these checks. A builder who won’t answer clear questions likely won’t deliver a reliable job. Take the time to ask — it’s the best way to protect your home and your budget.

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