Private Autism Assessment in London
Private autism assessment in London with independent clinicians we recommend, for adults and young people. London has the deepest private healthcare market in the UK and the longest NHS waiting lists for neurodevelopmental assessment. Most clinicians offer both in-person and remote consultations.
The short answer
A private autism assessment in London costs £800 to £1,800, with initial assessment within 3 to 6 weeks. Appointments are available in London or remotely, you can self-refer without a GP letter, and you pay the clinician directly with no booking fee.
- Typical cost in London
- £800 to £1,800
- Typical wait
- Initial assessment within 3 to 6 weeks
- Where
- In-person clinics cluster around Harley Street (W1), the City, Canary Wharf and Chiswick, with growing capacity in Stratford and Croydon.
- Referral needed
- No, you can self-refer
- NHS route
- Published NHS waiting times for Greater London are worth checking first, see sources below
Find me an autism assessment specialist in London
Tell us what is going on and we will reply within one working day with independent clinicians covering London who handle autism assessment, what they charge and how soon they can see you. Free, private, no card.
Private or NHS in London, side by side
| Private, through Take a Seat | NHS route | |
|---|---|---|
| Cost | £800 to £1,800, quoted by the clinician before you commit | Free at the point of use |
| Typical wait | Initial assessment within 3 to 6 weeks | Varies by service and trust in Greater London, see the published figures below |
| Referral | Self-refer, no GP letter needed | GP referral needed in most cases |
| Choosing your clinician | You pick the named clinician yourself and contact them directly | Allocated by the service |
NHS figures and pathways: NICE CG142, autism in adults; NHS, signs of autism in adults; NHS England, monthly diagnostics waiting times and activity.
About autism assessment in London
A private autism assessment provides a comprehensive, neurodiversity-affirming diagnostic evaluation. Take a Seat clinicians use ADOS-2, ADI-R or MIGDAS-2 alongside developmental history and functional impact mapping to produce reports families and GPs can act on.
Adult, private and near-you options in London
Most London enquiries are from adults self-referring without a GP letter. Clinicians assess over 18s directly, and see under 18s with parental consent where they hold the relevant registration.
Expect £800, £1,800 in London, quoted up front by the clinician. There is no Take a Seat booking fee, and follow-up costs are confirmed before you commit.
Searching from Greater London? Clinicians listed here work in or cover London, and most offer remote appointments so you are not limited to your nearest clinic.
Initial assessment within 3 to 6 weeks. Full report within 10 working days of assessment. That is typically far shorter than the NHS route for Greater London.
autism assessment specialists in London
See all →We're onboarding autism assessment specialists in London. In the meantime, our intake team can hand-match you to a clinician who covers Greater London.
Request a matchGetting a private autism assessment in London
Most people looking for a private autism assessment in London are not undecided about autism, they are stuck on a waiting list. A private assessment here is £800 to £1,800, the first appointment is normally 3 to 6 weeks away, and the written report follows within about 10 working days. It is delivered across two or three appointments rather than one long call, and the report is written so an employer, a university or your GP can act on it.
NHS England publishes waiting times for sleep studies each month under sleep physiology in its diagnostics dataset (DM01), alongside consultant-led referral to treatment waits for London providers, so you can check the current position for your area before going private.
Source: NHS England, monthly diagnostics waiting times and activityIn-person clinics cluster around Harley Street (W1), the City, Canary Wharf and Chiswick, with growing capacity in Stratford and Croydon.
Most clinics are within 10 minutes of an Elizabeth line, Northern line or Overground station.
London accounts for roughly a third of all UK private healthcare demand on the platform.
What to check before you pay in London
Ask which structured tool will be used. A defensible adult diagnosis uses ADOS-2, ADI-R or MIGDAS-2 alongside a developmental history. A single hour-long video call and a checklist is the version most often questioned later by employers and the DWP.
Ask what the report will contain: the named clinician and their registration number, the tool and its scores, who provided the developmental evidence, what was ruled out as well as what was found, and recommendations in plain terms. That is the difference between a diagnosis and a document you can use.
Ask whether ADHD, anxiety and trauma are screened alongside autism. They overlap from the outside, and a clinic unwilling to look at them is a clinic that may attribute everything to one label.
Then arrange the appointment with the clinician directly. Fees, dates and any in-person location in London are agreed between you and them, and we take no cut and hold no waiting list.
What's included
- Structured diagnostic interview (ADOS-2 / ADI-R / MIGDAS-2)
- Comprehensive developmental and functional history
- Sensory profile and co-occurring presentation screen
- Written diagnostic report within 10 working days
- Onward signposting and post-diagnostic support recommendations
Who it's for
- Adults seeking a formal autism diagnosis
- Adolescents and children (with parental consent)
- People with co-occurring ADHD, anxiety or sensory profiles
Timeframe and fees
Initial assessment within 3 to 6 weeks. Full report within 10 working days of assessment.
£800, £1,800
Final fee depends on the specific clinician and complexity.
Related conditions
Autism Assessment in other UK cities
Other private healthcare in London
Common questions
How much does a private autism assessment in London cost?⌄
£800 to £1,800, quoted by the clinician before you book, covering the developmental history, the structured assessment, the feedback appointment and the written report. Fees are paid to the clinician directly and Take a Seat adds no booking fee.
How long will I wait?⌄
Normally 3 to 6 weeks to the first appointment in London, with the report about 10 working days after the final session. NHS autism assessment waits are not published as a separate national measure, so ask your GP for the local position before deciding.
What actually happens in the assessment?⌄
A developmental history covering childhood, ideally with a parent or sibling able to fill gaps; a structured assessment such as ADOS-2, ADI-R or MIGDAS-2; questionnaires you complete in your own time; then a feedback appointment where the outcome is explained either way, followed by the report.
Can it be done online?⌄
Yes. The history and questionnaires work well by video, and most clinicians can complete the structured observation remotely. In-person appointments in London are usually in the West End, the City and south London, with video available anywhere.
Will my GP accept a private diagnosis?⌄
GPs generally accept a properly conducted private report for workplace and university adjustments, PIP and Access to Work, and referral to autism-informed therapy. There is no autism-specific medication, so shared care does not apply in the way it does for ADHD.
Should I be assessed for ADHD at the same time?⌄
Often, yes. Between 30 and 50% of autistic adults also meet ADHD criteria, and a combined assessment avoids paying for a second developmental history. ADHD is also the part with treatment attached, both medication and coaching.
Do you assess children as well as adults?⌄
Both, though the clinicians and tools differ. Say who the assessment is for on the enquiry form and you will be pointed at people who work with that age group rather than a general list.
How do I check the clinician is registered?⌄
Specialists list their own profession and registration number, so you can look them up on the GMC, HCPC or BACP register yourself before you book.
Book your autism assessment in London
Tell us a little about you and we'll match you with the right clinician, usually within 5 working days.
Get startedWritten by Take a Seat Editorial. Checked against the published sources below, and not against a clinician's individual review. Last checked 8 August 2026.
Sources: NICE CG142, autism in adults, NHS, signs of autism in adults, NHS referral to treatment guidance
This page is general information about privately available services in the UK, not medical advice or a diagnosis. Fees, availability and waiting times are set by each clinician and confirmed with you before you commit. If you need urgent help, see crisis support.