Luke Burford, co-founder of Compare Builders, a digital platform connecting homeowners with reputable tradespeople, has shared nine statements that should raise alarm bells when hiring a builder. He emphasizes that the biggest mistake homeowners make is rushing into choosing a builder without proper due diligence.
Why homeowners must be cautious
Burford warns that a builder might work on your home for months, and you are trusting them with one of your biggest investments. He advises asking questions, comparing detailed quotes, checking previous work, and walking away if something feels wrong. Good builders will not mind difficult questions because they have nothing to hide.
Cash-only payments
Paying cash is not illegal, and many honest tradespeople accept it. The warning sign is when cash becomes the only payment option or when the builder is reluctant to provide paperwork. Legitimate businesses need to account for payments, provide invoices, and honour warranties regardless of payment method. If someone avoids bank transfers, written receipts, or VAT invoices, homeowners should ask why. Paying in cash can also make it harder to prove agreements in court.
No contract needed
Contracts do not need to be frightening legal documents. For domestic projects, a simple written agreement should cover what is included, what is not, payment stages, start and completion dates, variations, and guarantees. Most disputes happen because people remember conversations differently months later. A written scope helps explain additional costs if extra work is requested.
Beating any quote
Comparing builders is not about finding the cheapest. Two £40,000 extension quotes can be completely different. One might include skip hire, scaffolding, decorating, building control fees, waste removal, and upgraded insulation, while another excludes them all. Some builders quote low and recover money through extras later. Homeowners should ask every builder to price from the same drawings and specification.
Starting tomorrow
There can be legitimate reasons for a builder being available unexpectedly, such as delays or cancellations. However, concern arises when someone never seems to have work booked. Good builders are usually busy because of recommendations. If someone is available immediately all year, homeowners should ask why.
Planning permission not necessary
Many homeowners confuse planning permission, permitted development, and building regulations—they are different things. Builders are not planning officers. If someone dismisses planning questions without understanding the project, that is concerning. Even if planning is not needed, Building Regulations approval often is. Ignoring either can cause expensive problems when selling the property.
Extras sorted later
This causes many arguments. Homeowners assume things are included because they seem obvious, while builders assume they are excluded because they were not specified. Common examples include painting, flooring, kitchen installation, appliance fitting, waste removal, skip permits, landscaping, electrical fittings, and decorating. Asking what is not included often reveals more than asking what is.
Leftover materials
Builders sometimes have surplus materials legitimately. The problem is when homeowners do not know where they came from, whether they are suitable, or if they are weather-damaged. Building materials are selected for specific structural and thermal requirements. Using random leftovers is not always appropriate.
Trust me
Trust should come from evidence, not confidence. Professional builders should provide insurance certificates, references, photographs, guarantees, company registration, and examples of previous work. Genuine builders expect questions. If someone becomes defensive when asked for references or insurance documents, that is often more revealing.
Price only available today
Construction is not like buying a sofa in a sale. Material and labour costs change, but rarely within hours. If someone insists on an immediate decision, Burford encourages slowing down. Good builders understand homeowners want to compare quotes, discuss finances, and feel comfortable before committing large sums. A rushed decision often becomes an expensive one.
