Perfect thanks I’ll look into it!

The issue here is that we use the door as our main entrance so sealing it like this won’t help

This actually might be the quickest solution even if he opens the door he won’t be able to go through. I’ll look into see if there’s any gates that would work! Thank you!

My little guy is more interested in how things move and what they do when used. Like flicking light switches turning knobs, pressing buttons ect and seeing what happens when they are engaged/disengaged. Our worry is that he’ll open the door to explore to find more things to try and get lost or wander towards the river in search of more switches or nobs to turn

To be completely honest my only solution might be to rip out the door and put in a regular door so normal child locks will work. With home and safety checks we will be subjected to, having the door requiring a key on both sides won’t work and will be flagged as a danger. Thank you for your response all input has been extremely helpful including your insight

Deadbolt at the top can cause the door to shift out of its tracks when pulled on and if it’s at the bottom it’s easily accessible to tiny hands playing with it. If I place it more in the top centre it’ll be Duffy to reach with a key unless it’s electronic… and that comes with many other issues

That might be an interesting approach if I can figure out how to get a pin through like a deadbolt and disengage with a magnet on a stick. Thanks for the different idea!

If I’m able to build a landing/porch on the outside this is the easiest solution. But at the moment my stairs make it 1.5 feet lower than the inside floor which means it’ll to high on the outside but to low on the inside.

Most keypad sets use a deadbolt system, because it’s a sliding door a deadbolt won’t work because it slides open. I have seen other locks that use clasps but none of them have keypads on both sides of the door.

Yes the current lock is a simple toggle that grabs an edge of the door on the inside. There is a keyhole on the outside which pushes the lever up unlatching the clasp from the edge of the door edited spelling errors

The current lock is a simple toggle. My autistic child loves to play with switches/nobs/wheels ect so he will be able to easily open the lock and pull open the door. There is nothing I can find to stop him from access to the toggle without blocking access from unlocking from the other side of the door

Yes this is why I need it to be accessible on both sides of the door. 1 for emergency access and 2 so I and my partner can unlock it coming home from work if the other is sleeping edit added missing word

This is an option however Ill be moving beside a river and my child is autistic so a lock would be best if I can figure out a way to do it

I’ll look at cross posting thanks for the advice!

I like this idea and it could work well. I was considering a latch system but the issue is it would need to go at the top of the door and would be problematic on the outside with the stairs and there can be leverage at the bottom popping the door out of the tracks