Hiring the right building contractor can make or break your project. Whether you’re planning a home extension, loft conversion, or full renovation, taking time to vet your contractor before signing anything could save you thousands of pounds — and a great deal of stress. Here are ten essential things to check before you commit.
1. Check Their Credentials and Qualifications
Always verify that your contractor holds the relevant trade qualifications and memberships. Look for accreditations from recognised bodies such as the Federation of Master Builders (FMB), TrustMark, or NHBC. These memberships signal a commitment to professional standards and ongoing training.
Don’t be shy about asking to see certificates directly — a reputable contractor will have no hesitation sharing them.
2. Ask for References and Review Past Work
A strong track record speaks volumes. Request references from at least two or three recent clients and, where possible, ask to visit a completed project in person. This gives you a realistic feel for the quality of workmanship you can expect.
Online reviews on Google, Checkatrade, or Trustpilot are also worth reading — pay attention to how the contractor responds to any negative feedback.
3. Confirm They Have the Right Insurance
At a minimum, your contractor should hold public liability insurance and employers’ liability insurance (if they employ staff). Without adequate cover, you could be held financially responsible if something goes wrong on site.
Ask to see proof of insurance documents and confirm that the policy is current before work begins.
4. Get Multiple Quotes — and Compare Like for Like
Obtain at least three detailed written quotes for your project. Be cautious of any quote that is significantly lower than the others — it may indicate cut corners, inferior materials, or hidden costs that surface later.
When comparing, make sure each quote covers the same scope of work, materials, and timeline so you’re making a fair assessment.
5. Understand the Payment Schedule
Agree on a clear, staged payment schedule before work starts. A typical structure might look like this:
- A modest deposit to secure the booking (avoid paying more than 10–25% upfront)
- Stage payments tied to agreed project milestones
- A final payment only once the work is fully completed to your satisfaction
Never pay the full amount upfront, and always pay by traceable means such as bank transfer rather than cash.
6. Get Everything in Writing
A verbal agreement is not enough. Ensure you have a written contract that clearly outlines the scope of works, materials to be used, project timeline, payment terms, and what happens if things change. This protects both parties if a dispute arises.
If the contractor is reluctant to put things in writing, treat that as a serious red flag.
7. Check Planning Permission and Building Regulations
Depending on the scale of your project, you may need planning permission, building regulations approval, or both. An experienced contractor will be able to advise you on what’s required and may even help manage the application process.
Never let work commence without the correct permissions in place — doing so could result in costly enforcement action or complications when you come to sell your home.
8. Clarify the Project Timeline
Ask your contractor for a realistic project schedule with key milestones and an estimated completion date. While delays can happen in construction, a professional should be able to give you a reasonable timeframe and communicate proactively if anything changes.
It’s also worth asking how many projects they’ll be running simultaneously — you want confidence that your job won’t be deprioritised.
9. Meet the Team Who Will Actually Do the Work
The person who sells you the job isn’t always the person on site every day. Ask who will be managing your project day-to-day and whether any work will be subcontracted. If subcontractors are used, check that they are equally vetted and covered by insurance.
A reliable contractor will be transparent about their team and happy to introduce you to the key people involved.
10. Trust Your Instincts
Beyond the paperwork and credentials, pay attention to how the contractor communicates with you from the very first contact. Are they punctual, responsive, and easy to talk to? Do they listen to your ideas and explain things clearly?
A building project is a significant investment and can be a long process — you need to feel confident in the person you’re working with. If something doesn’t feel right, keep looking.
Taking the time to do your homework before hiring a building contractor is one of the smartest decisions you can make as a homeowner. The right contractor will be open, qualified, and genuinely invested in delivering a result you’ll love. If you’re looking for a trusted, experienced building team for your next project, get in touch with us today for a free, no-obligation quote.
