Where to take a UK building complaint when work goes wrong

For a business owner or facilities manager, a building dispute can mean an unfinished repair, alleged defects or disagreement over the final bill. Searching for a “building ombudsman UK” can be confusing because ombudsman services usually cover specific sectors or organisations, rather than every builder and construction contract. Start by identifying the party responsible and the kind of work involved. That will help you decide whether to use an ombudsman or redress scheme, another dispute-resolution process, or legal advice.

For the wider picture of procuring and managing building work, see our construction guide.

Is there a general building ombudsman for UK contractors?

There is no single ombudsman that handles every complaint about building work. An ombudsman investigates complaints within a defined remit, so the name of the service alone does not establish that it can consider your case. The government’s overview of ombudsmen directs people to find the service relevant to their industry and complaint.

For business clients, first identify the contracting party and the nature of the dispute. A complaint about a contractor’s workmanship under a commercial refurbishment contract is not automatically the same as a homeowner’s complaint about a new-build developer. Your contract, the contractor’s own complaints process and any scheme membership may determine the options available. For broader procurement and contract-planning considerations, see planning building work as a business.

Which complaint route fits the work?

The New Homes Ombudsman Service is a specific route for qualifying complaints about new-build homes and developers who fall within the scheme. The legislation defines qualifying complainants in relation to relevant owners of new-build homes, while also allowing the scheme’s rules to set out whether other people or organisations may complain. So, if your business owns or manages a new-build property, check the service’s eligibility rules rather than assuming that commercial ownership is either included or excluded. The Building Safety Act provisions on the New Homes Ombudsman scheme describe its statutory framework.

Other routes may apply to a different type of complaint. For example, the Property Ombudsman and Property Redress Scheme address certain disputes with property agents; they are not general forums for complaints about builders. The government’s residential property dispute overview distinguishes these services from the New Homes Ombudsman and the Housing Ombudsman, which covers particular social-housing complaints.

For building work commissioned by your business, check whether the contractor belongs to a trade or dispute-resolution scheme and whether that scheme accepts commercial clients and your type of project. A scheme’s existence does not mean it can decide every contractual or technical issue. If the issue concerns a roof leak or failed repair, keep the complaint focused on the agreed scope, evidence of the defect and any applicable repair terms; the same records help you manage commercial roof repairs and planned roof maintenance.

What should you check before escalating?

Read the contract and the contractor’s complaint procedure. Look for the named contracting entity, the description of the work, specifications, payment stages, snagging or defect terms, and any reference to mediation, adjudication, arbitration or a redress scheme. Confirm whether that scheme covers your organisation as the client, the kind of building and the issue you are raising.

Separate the complaint into clear points: what was promised, what happened, what evidence supports your position and what outcome you are asking for. Avoid treating an ombudsman as a substitute for a building surveyor or engineer where the dispute turns on a technical assessment. An independent report may help establish the condition of the work, but check the contract and proposed dispute process before commissioning one.

How do you make a complaint useful and evidence-based?

Write to the contractor first, following its stated complaints process. The UK government’s guidance on resolving problems out of court says to complain directly to the company before approaching an ombudsman. That guidance describes ombudsmen as one form of alternative dispute resolution, but the service must have jurisdiction over the company and complaint.

Set out the timeline, identify the relevant contract clauses or specification, and attach proportionate evidence such as photographs, inspection notes, emails, variations and invoices. State what remedy you seek, for example completion of specified work or a response to a disputed charge. Keep copies of everything sent and record when it was delivered. Give the contractor a reasonable opportunity to respond in line with the contract and its complaint procedure.

How can you check whether the complaint route worked?

Before submitting a case, ask the scheme in writing whether it can consider a business client’s complaint about this contractor and project. Confirm any time limits, evidence requirements, remedies available and whether starting another process could affect eligibility. If no ombudsman or scheme accepts the complaint, consider negotiation or a suitable form of alternative dispute resolution; for a significant claim, obtain advice from a solicitor familiar with construction contracts.

Keep the outcome tied to the original issue. Check any agreed remedial work against the specification, record completion and retain the written settlement or decision. If the outcome does not resolve the dispute, review the contract and the scheme’s rules to understand what options remain before taking further action.

In this section Construction