Getting help with home improvement

Hi just wondered if anyone could help... My son is currently undergoing assessment for ASD diagnosis not till August. He's 13 and it's been a battle to get this far.. anyway he needs help now with independence so I want to change his room putting in sensory lighting a desk for his computer and other bits to make it a safe haven as he spends a lot of time in there... Would I be able to get any grants towards this? Or do I have to wait till August? Thanks