How to Vet a Builder: A Homeowner's Checklist (Credentials, Quotes & Red Flags)

Hiring a builder is one of the biggest decisions a homeowner makes. There's no shortage of tradespeople offering their services — but not all of them deliver on their promises. Choosing the wrong one can mean delays, shoddy workmanship, unexpected costs, and in the worst cases, an unfinished project and a significant financial loss.

This checklist walks you through exactly what to verify before you sign — credentials, insurance, quotes, contracts and the red flags to watch for. Already know who you want to hire locally? See our dedicated page for builders in Wolverhampton.

Why Choosing the Right Builder Matters

Your home is likely your biggest asset. Any building work — whether it's a single storey extension, a loft conversion, or a full house renovation — represents a significant investment of both money and trust.

A skilled, reliable builder will deliver your project on time, on budget, and to a standard that adds real value to your property. A poor one can do the opposite: leaving structural problems, failed inspections, and costly remedial work that can take years to resolve.

Getting this decision right from the start is everything.

1. Prioritise Local Experience

There's a big difference between a national building company and a local builder who knows your area inside out. A builder with genuine local experience will understand:

• The local council's planning policies and what's likely to get approved
• Local ground conditions — particularly important for foundations and drainage
• Permitted development rules as they apply to properties in your area
• Trusted local suppliers — which can reduce material costs and lead times

Ask any builder how many projects they've completed locally and request examples. A reputable local builder will have a portfolio they're proud to show you. If you're in the West Midlands, see our dedicated page for Wolverhampton builders.

2. Always Check Reviews and References

In 2026, there's no excuse for not checking a builder's reputation before you commit to anything. Here's where to look:

• Google Reviews — Search the company name and look at their Google Business profile. Pay attention to the overall rating, the volume of reviews, and crucially, how the company responds to any negative feedback.
• Checkatrade or Rated People — These platforms verify tradespeople and publish genuine customer reviews. A strong presence here is a good sign.
• Word of mouth — Ask neighbours, friends, and family in Wolverhampton if they've used a builder they'd recommend. A personal recommendation from someone whose home you can actually see is gold.
• Ask for references directly — Any reputable builder should be willing to put you in touch with past clients. If they hesitate or can't provide references, that's a red flag.

At Tettenhall Builders, we're proud of our Google reviews and are always happy to share references from homeowners across Wolverhampton who've worked with us.

3. Get Multiple Quotes — But Don't Just Go for the Cheapest

It's standard advice to get at least three quotes before committing to a builder, and it's good advice. But price alone should never be the deciding factor.

A quote that comes in significantly lower than the others isn't necessarily a bargain — it might mean:

• Cheaper, lower-quality materials
• Corners being cut on groundwork or structural elements
• Key costs excluded from the quote (glazing, flooring, planning fees)
• An underestimate that will balloon once work begins

When comparing quotes, make sure they're truly like-for-like. Ask each builder to break down exactly what's included. A detailed, itemised quote is a sign of a professional, organised builder. A vague one-line figure is a warning sign.

4. Verify Their Credentials and Insurance

Before any work begins, make sure your builder has the right credentials in place:

• Public liability insurance — This protects you if anyone is injured or property is damaged during the build. Ask to see a copy of the certificate. Never hire a builder who can't provide this.
• Employer's liability insurance — Required by law if the builder employs staff on site.
• Federation of Master Builders (FMB) membership — FMB members are independently vetted and must meet quality standards. Membership isn't essential, but it's a positive indicator.
• Building regulations compliance — Any reputable builder will obtain the necessary building regulations approval and ensure their work is inspected and signed off. This is essential for extensions and structural work — without it, you could face problems when you come to sell your home.

5. Assess Communication From the Start

How a builder communicates before you've hired them tells you a lot about how they'll behave once you have. Ask yourself:

• Did they respond promptly to your initial enquiry?
• Did they turn up on time for the site visit?
• Did they listen carefully to what you wanted, or push their own agenda?
• Was the quote delivered within the timeframe they promised?

Good communication isn't just about being friendly — it's about keeping you informed throughout the project, flagging issues early, and managing your expectations honestly. Poor communication is one of the most common complaints homeowners have about builders, and it's something you can assess before a single brick is laid.

At Tettenhall Builders, clear and consistent communication is something we take seriously at every stage — from the initial consultation through to completion and aftercare.

6. Watch Out for These Red Flags

Even if a builder seems impressive at first, keep an eye out for these warning signs:

• Asking for a large upfront payment — A reasonable deposit (typically 10–25%) is normal. Asking for 50% or more upfront before work begins is a serious red flag.
• No written contract — Every building project should have a written contract detailing the scope of work, timeline, payment schedule, and what happens if things change. Never agree to work on a handshake alone.
• Pressure to decide quickly — "I've got another job starting next week so I need a decision today" is a classic pressure tactic. A reputable builder won't rush you into a decision.
• Cash-only payment requests — Legitimate builders will invoice properly and accept bank transfer. Cash-only arrangements make it harder to trace payments and resolve disputes.
• No fixed address or local presence — Be cautious of builders who can't provide a business address or who have no verifiable local presence in Wolverhampton.

7. Understand the Contract Before You Sign

A professional builder will provide a clear written contract before any work starts. Make sure it includes:

• A detailed scope of work
• Start and estimated completion dates
• A full payment schedule tied to project milestones
• What happens if unforeseen issues arise (e.g. unexpected groundwork)
• How variations to the original spec are handled and priced
• Dispute resolution process

Read it carefully. If anything is unclear, ask for clarification before signing. A trustworthy builder will be happy to talk you through it.

Why Wolverhampton Homeowners Trust Tettenhall Builders

With over 80 completed projects across Wolverhampton and the surrounding areas — including Tettenhall, Wednesfield, Bilston, Codsall, Pattingham, and Wombourne — Tettenhall Builders has built a reputation based on quality workmanship, honest pricing, and reliable communication.

Our services cover everything from home extensions and loft conversions to full house renovations and new builds. Every project starts with a free, no-obligation consultation and site visit, and we provide detailed, transparent quotes so you know exactly what you're paying for.

We're fully insured, handle planning applications on your behalf, and ensure all work is signed off to building regulations standards. Our Google reviews speak for themselves — and we're always happy to connect you with past clients who can share their experience first-hand.