Disabled facilities grant

After some advice

My eldest son is on enhanced care pip and standard mobility for ADHD and ODD
My second son is on high care dla and low mobility
I am on dla low on both (due to apply for pip soon)

I currently have housing association property 3 bed semi which I have spent money on in and out so don't want to move.

I have a few issues that are making everyday life hard stressful and miserable. My kitchen is about same size as a bathroom, 3 cupboards and a cooker and fridge. No door as no turning space. It's hectic as family of 6. Also we have 1 toilet in the house. With two of my boys leaving certain things to last minute and the sheer amount of us here it's difficult. Resulting in accidents or boys going outside and watering plants so to speak. It's all really stressing me out, my cooker is my workspace in the kitchen and is right next to door and the boys don't think and put things on hot hobs well the list goes on.
Does anyone have knowledge whether I have a case for disabled facilities grant maybe to extend sideways for a larger kitchen and downstairs toilet?
I got quotes for like a lean to which can in around 10k and I don't have that as I'm a Carer for the boys and hubby a dustman. We have housing benefit to.
My second son has learning processing disorder and ADHD traits, he is actually entitled to own bedroom as shares with two brothers and they are constantly at war with him. But I think I would be asked to convert living room and dining room is seperate. This isn't an option as we dise it as quiet space for him while we in dining room and his brothers in bedroom. What can I say it's a hectic house

Any thoughts
Tara