The most complained-about landlords in the UK (2026)

London & Quadrant Housing Trust has the most upheld Housing Ombudsman findings in this 2026 Landlord Record ranking, with 914 adverse findings across 989 published decisions. That is the clearest data-led answer if you are asking which landlord has the most complaints in the UK by published Ombudsman determinations.

By severe maladministration findings, London & Quadrant Housing Trust leads with 220 severe findings across 989 published decisions. Severe maladministration is the most serious Ombudsman finding, so that is a separate signal worth tracking alongside raw adverse-findings volume.

This guide covers all landlords in the dataset, not only housing associations. If you want the housing-association-only view, see worst housing associations or the guide to which housing association has the most complaints . The distinction matters because the overall leader by volume may be a large housing association, but the all-landlord ranking also includes councils, ALMOs and other social landlords.

As with every Landlord Record ranking, the counts are published Ombudsman determinations, not every complaint a landlord receives. A landlord can resolve many complaints locally before a case reaches the Ombudsman, and some disputes fall outside the Ombudsman's jurisdiction. The ranking therefore shows where upheld published determinations are concentrated, not a complete service-quality score.

The ranking sits inside our current index of 16,224 published decisions across 603 landlords, including 2,499 decisions marked as severe maladministration. Source: Landlord Record analysis of Housing Ombudsman decisions (OGL v3.0).

Top 20 landlords by upheld findings

The table is built from getRanking('worst-landlords-overall'), which orders landlords by adverse findings. Each row is then joined to listLandlords() for decisions, maladministration rate, severe findings, compensation and findings per 10,000 homes where available. No numbers are typed into this page.

Read across the row before drawing a conclusion. A landlord with many adverse findings may also have a large published caseload. Another may have fewer decisions but a higher share found against it. A third may stand out for severe findings or compensation. Those are different risk signals, and they should not be collapsed into a simple "worst" label without context.

Size caveat: raw counts favour big landlords

Raw adverse-findings counts are easy to understand, but they are not always fair. Larger landlords manage more homes, more repairs and more tenancies, so more disputes can reach the Ombudsman. A large provider can therefore rank highly by volume even if its rate of adverse findings is not the highest. A smaller provider can look less prominent by volume but worse when you compare the share of its published decisions found against it.

That is why the table includes the maladministration rate and the per-homes column where the data is available from listLandlords(). If the per-homes value is not returned by the query, the table says "Not available" rather than filling the gap from outside sources. This keeps the page reproducible from the site's existing data layer.

The fairest reading is to use the columns together. Adverse findings show the total volume of upheld determinations. Decisions show how much published Ombudsman material exists for the landlord. Maladministration rate shows how often the Ombudsman found against the landlord within those published decisions. Severe findings identify the most serious outcomes. Compensation shows the total financial redress ordered across indexed decisions. None of those fields alone is a full service-quality score.

The table also does not tell you whether a landlord has recently improved. Published decisions can relate to events that began before the decision date, and a landlord may have changed policy, staffing or repair processes after an adverse finding. Conversely, a lower rank does not prove a landlord has no serious problems. It means only that, in this dataset and on this metric, it does not lead the 2026 list.

Method and attribution

This article uses only the existing build-time query functions: getRanking('worst-landlords-overall'), getRanking('severe-maladministration'), listLandlords() and getGlobalStats(). The overall adverse-findings ranking supplies the main order. The landlord list supplies the extra table fields. The severe ranking supplies the secondary leader for context.

Landlord Record is independent. The underlying source material is the Housing Ombudsman Service's published decisions, released under the Open Government Licence. We structure and analyse those determinations so readers can compare landlords, but the official finding in each case remains the Ombudsman's decision.

The page uses defensive fallbacks. If the database is unavailable at build time, the table renders an empty-state message rather than substituting manual figures. If a landlord does not have a homes denominator in the existing landlord record, the size-adjusted column is left unavailable. Those choices keep the page honest and reproducible.

This page should be read alongside the live rankings: worst landlords overall for the full adverse-findings table, and severe maladministration for the most serious findings. To check a specific provider, browse all landlord records.

What tenants can do

If your landlord appears on this list, treat it as context, not proof of your own case. Open the landlord record, read the decision summaries, and compare the themes with your issue. A ranking can show a pattern in published decisions, but your complaint still turns on your evidence, timeline and the landlord's response.

Keep dated records: reports, photographs, emails, complaint acknowledgements, repair appointments, inspection notes and any impact on your household. Follow your landlord's complaint process and ask for a clear written response. If the complaint remains unresolved and falls within the Ombudsman's remit, you can escalate it to the Housing Ombudsman.

When you complain, be specific. Say what happened, when you reported it, what the landlord did or did not do, how it affected you, and what outcome you want. If the issue is a repair, describe the defect and any failed appointments or temporary fixes. If the issue is complaint handling, explain the missed response, delay or unclear decision. A clear timeline makes it easier for the landlord, the Ombudsman or an adviser to understand the case.

If you are comparing landlords before moving, do not use this page as the only source. Look at the landlord's own performance information, local tenant feedback where reliable, the type of housing you need, and the live Landlord Record profile. An adverse-findings ranking is a useful warning signal, but it is not a substitute for checking the actual homes, services and complaint history relevant to you.

Sources

The primary source is the Housing Ombudsman decisions archive . For the complaint process, see the Housing Ombudsman Complaint Handling Code .