How to Check If a Builder Is Legitimate | Homeowner Guide

Verification Checklist

How to Check If a Builder Is Legitimate | Homeowner Guide matters most when a homeowner is close to making a decision and does not want a vague quote, soft assumption, or missing line item to become an expensive problem later.

1. Companies House Check (Free)

Go to beta.companieshouse.gov.uk

• Search their company name.
• Check incorporation date.
• Check accounts filed.
• Check no dissolution proceedings.

2. Insurance Verification

Ask for:

• Public liability certificate (minimum £2m).
• Employer's liability (if they have employees).
• Check it's current, not expired.
• Call the insurer to verify if large project.

3. Trade Body Membership

Verify on the organisation's website:

• Federation of Master Builders.
• TrustMark.
• NICEIC (electricians).
• Gas Safe (gas work).

4. Previous Work

• Ask for 3+ references.
• Actually call them.
• Ask to visit a completed project.
• Check for reviews online.

5. VAT Registration

If they claim to be VAT registered:

• Check at gov.uk/check-a-vat-number.
• Ensure invoices include VAT number.

Red Flags

• Company formed in last 6 months.
• Can't provide insurance certificate.
• No traceable address.
• Previous company dissolutions.
• Avoid building control questions.
• Want cash only.

The Final Check

Trust your gut. If something feels off, it probably is.

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Want us to verify your builder? [Get an independent review](/#get-started) from The Building Guys.

Next Step

If you want help applying this to your own project, use the right route below.

• Start with [Quick Review](/quick-review) if you want a fast first check.
• Use [Builder Quote Review](/builder-quote-review) if you already have a quote in hand.
• See the [Sample Report](/sample-report) if you want proof before you buy.

Frequently Asked Questions

Why does check builder legitimate matter so much?

Because check builder legitimate often sits right at the point where money, scope, and risk meet. If the paperwork is vague here, homeowners usually discover the problem after they have already committed.

Should I ask the builder more questions before I agree?

Yes. Clear builders should be able to explain what is included, what is excluded, and what assumptions sit behind the price.

Is a quick review enough?

Sometimes, yes. If you only need a first sense-check, start with [Quick Review](/quick-review). If you already have a proper quote or more serious concern, use [Builder Quote Review](/builder-quote-review).

What if I want proof before I buy?

Look at the [Sample Report](/sample-report). It shows the kind of clear, practical output we are aiming to give homeowners before they sign anything.

Practical Questions to Ask Before You Commit

When homeowners are dealing with check builder legitimate, the safest move is usually to slow the decision down and ask a few direct questions in writing.

• What exactly is included in the current price?
• What assumptions are being made that could change later?
• Which items are still provisional, estimated, or allowance-based?
• What would trigger a variation or extra cost?
• What needs clarifying before any deposit or approval is given?

Short questions like these often reveal whether the paperwork is genuinely solid or simply looks tidy at first glance.

The Safer Way to Use This Advice

Use this article as a filter, not as a substitute for proper review. If the issue still feels unclear after reading, that is usually the sign that a real second opinion is worth getting.

A Final Word on Check Builder Legitimate

• Check Builder Legitimate is worth checking before you commit.
• A weak decision around check builder legitimate usually gets more expensive later.
• Clear paperwork around check builder legitimate protects the homeowner, not just the builder.
• If check builder legitimate still feels vague, get a second opinion before money moves.