What happens during the 20-week assessment — which professionals are involved and what they assess.
10 min read
The 20-week clock starts ticking from the date your request for an EHC needs assessment is received by the LA, not from when they agree to assess. This is a statutory deadline unless a specific exception applies - the LA must usually issue the final EHCP within 20 weeks. While some LAs take longer, delay itself is usually challenged through the LA's complaints procedure, the Ombudsman, or specialist legal advice about delay rather than a standard SEND Tribunal appeal.
The LA gathers initial information from the school and any professionals already involved. They must decide within 6 weeks whether to proceed with a full assessment. The threshold is low: the LA only needs to consider whether it is 'necessary' for them to carry out an assessment. If they refuse, they must explain their reasoning and inform you of your right to appeal.
If the LA agrees to assess, they will request advice from a range of professionals: the school (headteacher and SENCo), an educational psychologist, your child's paediatrician or other medical professional, social care, and anyone else who knows your child well. You and your child have the right to share your own views. The LA must consider all of this advice when deciding what provision is needed.
By week 16, the LA should prepare a draft EHCP. You will receive a copy and have at least 15 calendar days to review, comment, and request changes. This is your opportunity to check that every need is identified and every piece of provision is specified. You can also request a different school placement. Do not rush this stage — it is your best chance to shape the final plan.
After considering your feedback, the LA issues the final EHCP. It should name a school, college or other setting unless a specific exception applies. If you disagree with appealable parts of the final plan - including needs, provision or the placement named - you have the right to appeal to the SEND Tribunal. You can also request a personal budget for some provision.
Last reviewed: 18 June 2026
