How to Choose the Right Builder

Choosing a builder is one of the most important decisions you will make during a construction project. The right builder delivers quality work, communicates clearly and finishes on time. The wrong one causes stress, delays and additional cost.

A 2025 survey by the HomeOwners Alliance and the Federation of Master Builders found that 47 percent of UK adults believe builders are legally licensed. They are not. There is no licensing requirement for builders in the UK, which means anyone can call themselves a builder regardless of experience or qualifications.

This guide explains what to look for and what questions to ask so you can make a confident decision.

Check their previous work

Ask to see completed projects that are similar to yours. A builder who has delivered kitchen extensions should be able to show you kitchen extensions. Photos are useful but visiting a completed project in person is better.

Look at the quality of the finishes, not just the structure. Are the edges clean? Are the joints tight? Are the surfaces level? The details reveal the standard of workmanship.

Read reviews from real clients

Google reviews are the most reliable indicator of a builder's reputation because they are difficult to fake and easy to verify. Look for patterns in the reviews rather than individual comments. If multiple clients mention good communication, that is likely genuine. If several mention delays, that is a warning sign.

Ask the builder for references you can contact directly. A good builder will happily provide them.

Get at least three quotes

Three quotes give you a reliable range. If two quotes are similar and one is significantly lower, the low quote may mean corners will be cut or costs will rise during the project. If one is significantly higher, ask the builder to explain what is included that the others have missed.

Always compare like for like. A quote that includes planning, building regulations, structural engineering and all finishes is not comparable to one that covers the build only.

Check what the quote includes

A good quote should clearly state the scope of work, the materials to be used, the total cost (including VAT), the payment schedule, the estimated start and completion dates, and what is excluded.

If a quote is vague, ask for clarification before signing anything. The most common source of disputes in construction is unclear scope.

Verify their insurance

At minimum, your builder should carry public liability insurance and employer's liability insurance if they have employees. Ask to see certificates and check the expiry dates. If something goes wrong on your property during the build, you need to know you are covered.

Look for professional memberships

While there is no legal requirement for builders to be licensed, voluntary memberships indicate a commitment to standards. Look for membership of the Federation of Master Builders (FMB), the National Federation of Builders (NFB), TrustMark, or accreditation schemes like Checkatrade or MyBuilder.

These memberships typically require vetting, inspections and adherence to a code of conduct.

Assess their communication

How a builder communicates before the project starts is a strong indicator of how they will communicate during it. Do they respond to calls and messages promptly? Do they explain things clearly? Do they turn up when they say they will?

If communication is poor before money changes hands, it will not improve once the project is underway.

Agree a payment schedule

Never pay the full cost upfront. A reasonable payment schedule is a small deposit on signing the contract (typically 10 to 15 percent), stage payments linked to completed milestones, and a retention payment held until all snagging is resolved.

Be cautious of any builder who asks for a large upfront payment before work begins.

Get a written contract

A written contract protects both you and the builder. It should cover the scope of work, the total price, the payment schedule, the start and completion dates, the process for handling variations, and the defects liability period.

For smaller domestic projects, the JCT Minor Works or FMB contract templates are widely used and provide fair terms for both parties.

Trust your instincts

Beyond the practical checks, pay attention to how you feel about working with this person. You will be in regular contact for weeks or months. If something feels off during the quoting stage, it is worth exploring other options.

The right builder makes the process straightforward. You should feel informed, confident and supported from the first conversation.

How we work

At Renex, we provide clear quotations that detail every aspect of the work, communicate regularly throughout every project, and give every client access to a portal where they can track progress and milestones. If you're looking for a builder in Lancashire, we'd welcome the opportunity to discuss your project.