The Missing Piece: How Undiagnosed Neurodivergence Can Lead to Homelessness

Housing systems run on paperwork, deadlines and forms. For many people, that’s manageable. But for someone with undiagnosed ADHD or autism, these everyday demands can feel impossible to meet.

This could show up as a missed benefits deadline, a forgotten tenancy renewal, or a misunderstood conversation with a landlord. None of these seem dramatic alone, but together they can slowly unravel a person’s stability.

KCAH sees this pattern often. Behind many housing crises sits an undiagnosed neurodivergent brain, struggling against systems never built for it.

This National Inclusion Week, we explore why recognising neurodivergence early could prevent homelessness before it starts.

Housing systems can seem simple on the surface. Fill in a form. Remember a deadline. Answer a call from your landlord. But these small tasks rely on skills that not every brain has in equal supply.

For someone with undiagnosed ADHD or autism, these tasks can feel far harder than they look. Working memory might not hold onto a deadline. Time can feel slippery, so a form gets submitted too late. Or, a phone call might feel overwhelming rather than routine.

None of this means someone is careless or unmotivated. It means the system was built with one type of brain in mind. When that brain doesn’t match the person using it, small gaps can turn into serious problems. And in housing, those gaps can eventually cost someone their home.

Executive function covers the mental skills we use to plan, remember and follow through. These include working memory, time management and task initiation. For people with ADHD, these skills often work differently. Researchers at Cambridge University found that everyday admin, like paying bills, becomes much harder when something more interesting pulls their attention away, and details slip out of working memory before they can act on them.

This isn’t about a lack of effort. A recent study of adults with ADHD found that they consistently struggled with lateness, missed deadlines and forgotten instructions, no matter how motivated they were. Participants reported key challenges including difficulties with time management, planning, and working memory, which often led to frustration and stress.

Now picture these same struggles applied to a benefits review or a tenancy renewal. Suddenly, the stakes look very different.

Getting a diagnosis in the UK is not easy. Waiting lists are long, and many adults wait years for an answer. As of early 2025, over 212,000 people in England were waiting for an autism assessment. At the same time, up to 549,000 adults were waiting for an ADHD assessment. Behind these numbers are people trying to hold down jobs, tenancies and benefits claims without any support.

Diagnosis is often delayed further because adult symptoms look different from childhood ones. Common barriers include:

• Masking, where someone hides their traits to fit in, so struggles stay invisible to others.
• Misdiagnosis, where anxiety or depression gets treated while the root cause goes unnoticed.
• Self-doubt, where years of “trying harder” stop someone from seeking an assessment at all.
• Limited GP awareness, especially around how these traits present in adults rather than children.

Each barrier adds delay. And every delay increases the risk that daily struggles turn into a housing crisis.

Small struggles can build into something much bigger. Here’s how that chain often unfolds:

• A missed form or call leads to a benefits sanction
• Reduced income makes rent harder to keep up with
• Unstable housing brings more stress, which makes focus and planning even harder
• The situation spirals, sometimes ending in eviction or homelessness

At KCAH, we’ve seen this pattern up close. In one case, severe and untreated ADHD contributed to a chain of missed obligations. Eventually, this led to criminal behaviour and a prison sentence. This wasn’t a story about someone who didn’t care. It was a story about a brain working against systems that were never built to accommodate it.

Undiagnosed neurodivergence can also overlap with substance use, particularly when someone has spent years self-managing untreated symptoms. This is one reason The Bridge exists. The service works specifically with people who use substances and are sleeping rough or at risk of it, offering the kind of specialist, non-judgemental support this group often needs.

This is why early recognition matters so much. When someone’s traits are identified and understood, support can step in before a missed deadline turns into a lost home.

Recognising the problem is only the first step. The real fix means rebuilding parts of the system so it works for every kind of brain, not just the neurotypical majority.

Some practical adjustments already help, including:

• Visual reminders and simple checklists for tracking deadlines
• Advocates who can support someone through benefits or tenancy admin
• Flexible appeal windows that account for missed communication
• Plain-language forms that reduce cognitive load

But adjustments alone aren’t enough. Frontline housing and support staff need to actually recognise these traits when they show up, often as missed calls, late paperwork, or what looks like disengagement. This is where training on neurodiversity becomes essential. When staff understand how ADHD and autism affect executive function, they can adapt their approach early, before a small gap turns into a housing crisis.

Homelessness is rarely caused by one single failure. Often, it’s the result of a system that expects a different kind of brain. By building neurodiversity training into frontline services, we can catch these patterns sooner and keep more people safely housed.