Hello! Thank you in advance for any help/advice!
We recently moved home, and in our new garden we have a manhole/access hole, which sits around 20cm lower than the level of the backdoor/house. Due to water damage/erosion as well, this side of the garden is lower then the other side. We are hoping to find a way to create a box/frame and a lid to allow us to raise the level of soil around the manhole, whilst also making a lid so its a bit safer to walk around for our pets (currently have a cage/cover over it to stop them getting near it) and so it can still be accessed if the council needs to. In the photo below, you can see the level of soil needs to be at the level of the top sleeper of the retaining wall under the fence, so 20cm ish higher.
Has anyone had to deal with something like this before? Any advice on how we could go about it would be amazing! Thanks so much 🙂 Lauren

