Urine smell

[Stan18]

Hiya after some advice!

We moved in to our current home in March when I was rather pregnant (dd2 born June). We have storage space under our stairs and until recently, it had a large variety of crap there due to me not being arsed to sort it!

Well I got round to it, and it absolutely stinks of wee under there. The only thing I can describe it as being like was when my nan was in a nursing home and the strong urine smell as I walked in there.
I’ve cleared it, ended up chucking a lot as it stunk and was ruined. There are four small damp patches on the wall and the skirting board is rotting away at the bottom. We do have a dog, but there is no way he could have got to this part of the wall as there was too much stuff in front of it.
My only thoughts are that next doors pets are peeing up the wall and it’s sleeping through (they have a cat and a dog). It’s a difficult subject to approach made worse by the fact next door have very limited English (always say hello but that’s about it). We are housing association but have no idea what next door are, I don’t think council have any homes down this street.
I have tried everything. Used bicarb, white vinegar, Vanish.. nothing. I used a carpet cleaner machine today on it and as it was sucking up the cleaning fluid it stunk to the point it made me gag. When I emptied the tanks water it was yellow (I did the hall and that was black).
There’s no underlay either.
I’m at my wits end with what to do. It’s getting stronger by the day lately and as soon as you walk through the front door it’s all you can smell 😞

[BellaNoche]

Ask the Housing Association to investigate it, they are the landlords after all.
It could be damp, you could have vermin.
I doubt that animals urinating on an outside wall would cause this unless the wall itself is in a state of disrepair.

[Stan18]

I’m not sure it is possible; the wall is directly on to next door (we are in the middle of two houses) xx

[Bluerosethorns]

Rats / mice. Been there and took me ages to figure out smell

[Protectingmydaughterfromfilth]

You need to call Environmental Health. This is a health risk in my opinion. Whether next door are rented/social housing/owned they can investigate if it’s coming from their side and take action against them. Definitely call them ASAP

[Havingahorridtime]

Did the previous occupants have a pet?