Starting a house renovation is exciting but also nerve-wracking. You're about to hand over a significant amount of money and time to someone else, so asking the right questions upfront is crucial. This guide covers the essential questions you should ask any builder before signing on the dotted line.
Questions About Their Experience and Track Record
The first thing you need to know is whether your builder has actually done this before. Experience matters more than you might think, especially for complex projects like full-house renovations.
How long have you been in business?
A builder with at least 10-15 years under their belt has weathered market changes, supply chain disruptions, and plenty of tricky situations. They've seen what works and what doesn't. New builders can be brilliant, but longevity signals staying power and a reputation worth protecting.
How many projects like mine have you completed?
If you're doing a bathroom renovation, you want someone who's done dozens of bathrooms, not their first. If it's a house extension, same thing. Ask for specific examples and whether they have photographs of completed work in a similar style to what you want. This is where you'll spot whether they can actually deliver your vision.
Are you fully insured?
Always verify this independently. Don't just take their word for it. Check the relevant bodies in the UK - ask whether their insurance is current. This protects you if something goes wrong on site.
Do you specialise in this type of work?
Some builders are generalists. Others focus on specific areas like house extensions and full property renovations. A specialist will move faster, spot problems earlier, and deliver better results because they've solved similar challenges hundreds of times.
Questions About References and Reputation
Talk is cheap. You need proof that this builder delivers on their promises. References from actual customers are worth far more than any marketing material.
Can you provide references from recent clients?
Ask for at least three. Then actually contact those people. Ask whether the project finished on time, on budget (or close to it), and whether the builder communicated well. Did they clean up properly? Did unexpected issues arise, and how were they handled? A builder who's confident in their work will give you good references.
How do you handle complaints or problems?
Even the best builders sometimes get negative reviews. What matters is how they respond. Do they ignore them or address them? A builder who takes feedback seriously and tries to make things right is someone you can trust. If you find online reviews, look at the ones that mention problems and see how the builder handled it.
Who actually does the work?
Will the builder themselves be on site most days, or are they just project managing? Will it be a permanent team they employ, or will they bring in different subcontractors for each job? Understanding the team structure tells you a lot about quality consistency and who you'll be dealing with day to day.
Questions About Their Process and Communication
A major renovation takes weeks or months. You'll want to know how you'll actually work together during that time.
Walk me through your complete process from start to finish.
You want to hear about planning stages, Building Regulations approval, how they manage site safety, how they handle changes mid-project, and what the handover looks like. A clear, detailed answer here is a good sign. If they're vague, that's a red flag.
How often will we communicate and how?
Will they check in daily, weekly, or as needed? Can you call or text, or do they prefer email? Will you get regular progress photos? Some people want constant updates; others prefer to hear only if there's a problem. Make sure your communication style matches theirs. A builder who goes silent for weeks without updates is stressful to work with.
Will I have direct contact with you or a site manager?
If your builder is running multiple projects, you might speak to a site manager instead. That's fine, but you should know upfront. Having one consistent point of contact makes a huge difference.
What happens if we need to change something mid-project?
Scope creep happens in almost every renovation. You might want different tiles than originally planned, or discover an issue that needs fixing. How does your builder handle changes? Do they charge extra? How long does approval take? Understanding this process prevents nasty surprises.
Questions About the Timeline and Project Planning
Everyone wants their renovation finished quickly, but speed isn't everything. You want a realistic timeline and a builder who sticks to it.
How long will this project realistically take?
Get a start date and an estimated finish date. Ask what could delay it (bad weather, supply issues, discovering hidden problems behind walls). A builder who gives you a tight promise they can't keep is worse than one who gives you an honest estimate and finishes early.
What happens if the project runs over?
Is there a penalty clause if they miss the deadline? What's a reasonable buffer for unexpected problems? You're looking for reassurance that your builder takes timelines seriously but also that you both have realistic expectations.
When will my home be accessible to me?
If you're living in the property during renovation, you need to know whether certain rooms will be completely off-limits and for how long. If you're moving out, when can you move back in? These details matter for your quality of life during the project.
Questions About Money and Payment
This is uncomfortable to discuss but absolutely essential. Money disagreements cause most renovation arguments.
What's your payment schedule?
Most builders want a deposit upfront, then progress payments as work completes. Never pay the full amount in advance. A typical split might be 10-20% deposit, then payments at various milestones, with a final 10% due after completion. Understand exactly when each payment is due and what triggers it.
What's included in your quote?
You need clarity on what you're paying for. Is it labour only, or does it include materials? What happens if prices of materials jump? Are there any allowances for unknowns? The more detail in the quote, the fewer surprises later.
How much notice do I get for cost increases?
Sometimes renovation costs go up due to supply shortages or unexpected issues. How quickly will your builder tell you? Will they get your approval before spending extra? A good builder lets you know as soon as they spot a potential extra cost, not after the work's done.
What's your cancellation policy?
Life happens. If you need to pause or cancel, what happens to your deposit? What notice do you need to give? Understanding this protects you both.
Questions About Specific Services You're Having Done
Depending on your project type, you'll have more specific questions. If you're planning a bathroom renovation or plumbing work, ask whether they can handle the full scope or if they'll bring in specialists. For house extensions or complete renovations, ask about their experience with Planning Permissions and Building Regulations approval - they should guide you through both.
Will you handle the paperwork with the council?
Most builders know the local authority requirements, but confirm they'll manage Building Regulations applications and inspections. This takes stress off you.
What guarantees do you offer on materials and workmanship?
Ask for a written guarantee on their work - typically 5-10 years is standard. Some materials (boilers, fixtures) come with manufacturer warranties too. Understand what's covered and what isn't.
Red Flags to Watch For
Some answers should worry you. If a builder can't or won't provide references, acts evasive about timelines, demands full payment upfront, or doesn't answer questions clearly, that's a sign to look elsewhere.
Similarly, if they promise impossibly fast timelines or rock-bottom prices compared to everyone else, be suspicious. Quality renovation takes time and costs what it costs. Builders who cut corners to hit unrealistic budgets usually regret it, and so do their customers.
Before You Sign, Get Everything in Writing
Once you've asked all these questions and you're ready to move forward, make sure every promise gets written down in a contract. Verbal agreements cause disputes. A proper contract covers scope of work, timeline, payment schedule, who supplies materials, what happens if something goes wrong, and how changes are handled.
If you're planning a significant renovation and want experienced guidance on what to ask and what to expect, AKS MultiTrade offers free consultations where we can walk you through the process. Having someone with over 15 years of renovation experience review your plans and timeline is worth the conversation.
People Also Ask
What should I ask a builder about insurance?
Always ask for proof of public liability insurance and employer's liability insurance (if they have employees). Request a copy of the certificate and verify it's current. This protects you if someone is injured on your property or if something is damaged. You can also check the UK's Financial Conduct Authority or relevant trade bodies for registered contractors.
How do I check if a builder is legitimate?
Look for FENSA registration (for electrical work), Gas Safe registration (for gas work), or membership with bodies like the Federation of Master Builders. Ask the builder directly and verify independently online. Check Google reviews and the local Better Business Bureau. Ask for references and actually call them.
What if the builder finds a problem mid-project?
This happens often - you tear down a wall and find rotten wood, or uncover outdated electrical work. Your contract should spell out that the builder will notify you immediately with photos and a proposed solution. You'll likely need to approve any extra work and agree on timing and cost before they proceed.
Should I pay for materials myself or let the builder source them?
Usually the builder sources everything because they have supplier relationships, guarantees on materials, and accountability if something's wrong. If you buy materials yourself, you lose that protection. Let your builder handle it - it's cleaner and fewer things can go wrong.