It isn't great sadly but they're are few options that work long term except poisoning or lethal traps. If you manage to get them to not visit, what happens when someone else does the same because they now see them in their garden/roof/garage? And as soon as you start with gardening again, they'll come back as they find your garden again. The development will just have meant they need a new home so they have found one. Summer is easier because they have other more natural food supplies so they'll not cause issues but they will still be there and return when the weather gets colder, only in greater numbers.
Living on a farm there has only been 1 option really for rats and mice (especially with the mouse plague in NSW, giggle it and you'll be horrified
Farmers, rural residents warned to be vigilant to prevent another mouse plague and
Mouse plague on hold thanks to floods, CSIRO thinks ). Sadly that is simply a case of how to kill them as quickly as possible to minimise suffering. Traps (live or lethal) don't work with other animals or birds around. My chooks would get caught in them without fail. So the choice becomes, how quickly I can kill them AND how safe I can make it for anything that may eat the poison that's not intended for it or
how safe the carcass of the poisoned rat/mouse is. This is a big concern for me with wildlife eating poisoned carcasses.
I use a modern secondary poisoning safe poison block. My chooks would have to eat (in 1 sitting) their bodyweight in the poison to die from it, dogs or cats are likely wouldn't because it's a wax block of grain. Wildlife isn't affected, so birds of prey and scavengers are safe to eat the dead rat/mouse. The blocks can be nailed down or put into the poison traps (black boxes). I usually buy the 8kg size so technically one of my chooks
could die from it if they ate all of it in one go, but that amount usually lasts me 2 years and the volume of poison is bigger than the chook. My chooks will and do catch mice and eat them. I have had one occasion where I've found a chook chocking on a dead mouse and when I cut the mouse on half with a space, it was clear it was a poisoned one because it's inside were blue (same colour as the poison (so I removed it)). I'd prefer that the rat or mouse didn't suffer. Often we find them dead next to the black poison box itself. Recently I found one (this week) that had died as it walked along. Literally just dropping dead presumably from a heart attack. Sadly it really is a case of how quickly does it die and is the carcass safe to be eaten by wildlife/ farm animals?