Essential Questions to Ask a Builder During a Home Survey

Walking through your home with a builder for the first time is more than just a chance to get a quote; it is a vital interview for the person who will be responsible for your biggest asset. This guide explains the specific questions you should ask to uncover a contractor's expertise, reliability, and approach to modern UK building regulations. By the end, you will feel confident in choosing a partner who can deliver your dream kitchen, extension, or loft conversion without the stress.

Understanding the Scope and Logistics

Before you dive into the aesthetics of tile choices or cabinet finishes, you need to understand how the builder operates on a day-to-day basis. A home survey is the perfect time to ask about their current workload and how they manage multiple sites. In 2026, the UK construction market remains busy, so knowing if your builder will be on-site every day or juggling four other projects is essential for your peace of mind.

Ask who will be the main point of contact and how often you can expect progress updates. You want to hear that there is a dedicated site foreman or a project manager who will be available by phone or email. If the person doing the survey is a 'salesperson' who disappears once the contract is signed, that is a red flag you need to identify early on.

• Will you be using your own employees or sub-contractors?
• What time do you usually start and finish each day?
• How will you protect the rest of the house from dust and debris?
• Where will you store materials and site toilets?

Budgeting, Quotes, and the 2026 Price Landscape

With the cost of materials like timber and insulation fluctuating, a 'fixed price' quote is the gold standard for homeowners. During the survey, ask how they handle unforeseen costs. For a typical Victorian terrace extension costing around £60,000 to £85,000, a 10% contingency fund is standard, but you should ask the builder what common 'surprises' they find in houses similar to yours.

Inquire about their payment schedule. Reliable UK builders should never ask for 100% of the money upfront. A typical 2026 payment structure involves a small deposit (often 5-10% to secure the date), followed by stage payments as specific milestones are met, such as 'groundworks complete' or 'first fix electrics'. Always check if the quote includes VAT, as this 20% addition can significantly impact a £50,000 budget if it wasn't accounted for.

1. Is this a fixed-price quote or an estimate based on day rates?
2. What is the payment schedule, and what triggers each payment?
3. Does the price include waste removal and skips?
4. How do you handle 'change orders' if I decide to add work mid-project?

Qualifications, Insurance, and Compliance

Never assume a builder has the necessary paperwork just because they have a professional-looking van. A home survey is the right time to ask about their public liability insurance—ensure it covers at least £2 million to £5 million for residential work. You should also ask about their familiarity with local authority building control and how they handle inspections.

For specific works, ensure they have the right certifications. If you are having a new boiler installed in a kitchen refurb, they must use a Gas Safe registered engineer. For electrical work, look for NICEIC or NAPIT accreditation. Ask if they are members of trade bodies like the Federation of Master Builders (FMB) or TrustMark, which provide an extra layer of dispute resolution and vetting.

• Can you provide proof of current Public Liability and Employer’s Liability insurance?
• Will you provide a FENSA certificate for new windows and doors?
• How do you ensure the work meets the latest Part L building regulations regarding energy efficiency?
• Do you offer an insurance-backed guarantee on your work?