Before You Hire a Builder: The Checks Every UK Homeowner Should Run

His advice comes back to one principle: do your checks before work starts.

From finding vetted builders to assessing builder quotes, checking insurance and speaking to previous customers, a little due diligence at the beginning can save considerable stress later.

If you are wondering how to check a builder, Luke recommends starting with three straightforward questions.

Do not simply ask for a builder's favourite references. Asking to speak to their most recent customers can give you a clearer picture of how they work today.Ask previous clients whether the builder communicated properly, arrived when expected, managed changes clearly, and dealt with problems professionally.A good completed project matters, but the experience of getting there matters too.

Do not treat insurance as a box-ticking exercise.

A proper builder insurance check should confirm that relevant cover exists and that the details match the business you plan to appoint. It is also worth asking the builder to explain what happens if something goes wrong during the project.

Insurance should support the checks you carry out before signing a contract, rather than becoming something you only ask about after a problem occurs.

The person who prepares your quote or visits your home initially may not manage the work every day.

Ask who will supervise the site, who will answer your questions, and who has responsibility for making day-to-day decisions.

Clear accountability becomes particularly important on extensions, major renovations, and other projects that may run for several months.

Luke’s point highlights why proper checks matter. A professional-looking website or social profile alone does not prove competence. Compare Builders helps homeowners find vetted builders and gives them more information to consider before making contact

Choosing vetted builders gives you more information to work with, but you should still understand exactly what has been checked.

Every trade is checked and rechecked, not checked once on: Companies House status, public liability insurance confirmed directly with the insurer, VAT registration, trade body membership cross-referenced against the Gas Safe, TrustMark, NICEIC, FENSA, FMB and NHBC registers, reputation and Trust Portfolio, right to work, photo ID with a liveness check, and financial standing.

The purpose is not to eliminate every possible project risk. It is to make a more informed decision before committing your money and your home to a contractor.

Price matters, but the cheapest quote can become expensive if it excludes essential work.

Luke's warning is blunt. "If three similar quotes come in, but another is 30% under, that quote is missing something, and you'll pay for it later, usually with interest."

Set your own range before you read a single quote. The Compare Builders Cost Planner gives an indicative budget range for your job type and postcode area, so you know whether a figure is low because it is competitive or low because something is missing

Rather than immediately choosing the cheapest option, find out why the figures differ.

Check whether each quote covers:

A quote is only valuable when you understand what lies behind the final figure.

Knock 15% off, and some builders will still take the job on and just cut corners.

A builder may agree to the lower figure, but the project still must be financially viable. Budget pressure can then manifest as cheaper materials, rushed work, or reduced time on site.

Instead of asking someone to remove an arbitrary percentage, discuss the specification.

If you need to reduce overall costs, ask which design choices, materials, or non-essential elements could be changed without compromising essential structural or weatherproofing work.That creates a more transparent conversation about value.

A legitimate builder with a healthy business doesn't need 40% up front.

While certain projects legitimately need upfront payments for costly or long-lead materials, this does not mean most of the project cost should be withdrawn from your account before any significant work starts.

Establish a clear payment schedule prior to beginning the work.

Payments can follow defined stages or milestones so both parties know when invoices become due. Put the arrangement in writing and make sure the contract also explains how additional work or changes will affect the price.

Variations can quickly push a project beyond its original budget if nobody agrees on how to price them beforehand.

Changing your mind midway through construction typically incurs higher costs than decisions made during planning. It's advisable to select key items like kitchens, bathroom fittings, tiles, and finishes as early as possible.

Late decisions can impact ordering, labor, sequencing, and other trades. Even a small change can cause delays in multiple parts of the project. Clients who make prompt decisions tend to have better control over both the budget and the schedule.

Conduct thorough research initially, make informed choices, and then allow the professionals you hire to complete the work as agreed.

Premium finishes can enhance a home's appearance, but high cost doesn't always equate to value. A £100k kitchen or £80k bathroom on a road where the average house price is £600k is money you will never see again. Similarly, swimming pools can pose challenges because buyers often factor in ongoing maintenance and operational costs alongside aesthetics.

Structural integrity should be given more importance. Over ten years, a kitchen can undergo significant changes. Addressing issues related to structure, roofing, waterproofing, or other essential components can be much more disruptive and costly.Set the budget around what your home needs before deciding how much to spend on what you simply want.

Once you know where to look, some warning signs become much easier to recognize.

Look closely at the visible finish:

Untidy, visible work should prompt further questions about areas you cannot easily inspect. Fire doors and fire-stopping also deserve proper attention. Gaps, missing components or poorly sealed service penetrations can indicate a lack of attention to important details.

A well-designed kitchen can draw buyers' attention away from issues elsewhere in the home. Be sure to look both up and around.

Rooflines, chimneys, gutters, and external joinery reveal much about maintenance. Inside, check for cracks near openings, ceiling stains, damp odors, and uneven floors.

Bad weather can cause additional issues that may not be visible during dry conditions. If you're concerned about a property, getting professional surveys and inspections can offer more insights before making a decision.

New does not always mean flawless. Fast construction programmes can put pressure on finishing quality, so homeowners should inspect their new property carefully.

Inspect doors and windows, sealant, thresholds, insulation, and drainage systems. Document any snagging issues thoroughly before completion whenever possible.

Photographs and written records provide a much clearer trail than relying on conversations alone.

The homeowner-builder relationship works both ways.

Professionals seek clear specifications, reasonable decisions, and clients who understand their scope of work. Homeowners value quality craftsmanship, transparent pricing, and timely communication. Clear communication benefits everyone.

Luke's experience emphasizes a broader lesson applicable beyond construction: people tend to recall how a business responds to an issue more than the issue itself. Trust is built through transparent communication and corrective actions.

Choosing a builder should involve more than comparing prices or scrolling through a few reviews.

Speak to recent customers. Complete a builder insurance check. Establish who will supervise the project. Read builder reviews, but also verify the business behind them. Compare the scope within your builder quotes, not simply the figures at the bottom.

Most importantly, make sure you know who you're trusting with your home before signing a contract or handing over a large sum of money.

Every trade on Compare Builders has already been through those eight checks, and is rechecked rather than checked once. You describe the project, choose three verified builders from the ones interested in it, and compare three quotations side by side. It is free for homeowners.

Compare Builders introduces homeowners to verified trades. The contract for the work is between you and the trade you appoint.

If you have a building project in mind, start by clearly setting out the work, budget and timescale. The better prepared you are before approaching a builder, the better questions you can ask once the conversation begins.