Well, they will need plenty of space for parking and there's just about a car's width between their walnut tree and our fence so I'm presuming very narrow. Perhaps they'll drop the idea.
Leylandii does have its fans! If kept in shape it is a good green hedge and is meant to be the best at absorbing road pollution - I live on the side of a small country road, but huge lorries do regularly pass, along with ancient 4x4s belching out fumes so I would seriously consider replacing our out of control one with another for that reason alone. As my hedge is south facing it also provides much needed shade as well as traffic screening, plus it provides dense cover for a host of birds. I have no neighbours to worry about though and for the OP, the worry that they simply won’t look after it is justified and I would be similarly trepidatious in her situation - but that’s the fault of the owners that don’t keep it trimmed, not the poor tree itself.
Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
Leylandii would be perfect for this. Why would you think otherwise?
We regularly read this forum. Are you trolling?
No. But any bad rep leylandii gets is because it's left without a once a year trim. MOST leylandii in gardens is kept neat and it's an easy plant to maintain. I just dislike uninformed headlines about things such as this and knotweed etc. Peoole need facts to base decisions upon, not fiction.
If you can condition the soil well at planting stage, Prunus Lusictanica, Portuguese Laurel could be a nice choice. But it will need annual pruning to keep within less than a meter depth.
There was an orchard farm near my old house in Belgium that had a very narrow beech hedge around its road perimeter - single layer, 9 to 12" deep and kept finely trimmed. Not evergreen but it kept the brown leaves all winter so still made a good screen and then lots of lovely fresh green foliage in spring. Looks good all year.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
MOST leylandii in gardens is kept neat and it's an easy plant to maintain.
Not where I live! I can show you any number of monster leylandii hedges which blot out the sun, overhang the pavements, and even enshroud street lights so they are invisible. Both of my next door neighbours are among the culprits. People in Liverpool absolutely adore gigantic leylandii, they grow very little else!
You rarely see lleylandii properly kept I'm afraid. There are other conifers which can be kept in a neater state. Lleylandii looks dire unless it's at least four feet deep, and it doesn't sound like the OP's neighbour has that sort of room. Can't recall the name of the one my neighbour has but it'll come to me - it's around 18 inches in depth, six or seven feet high, and is very smart. She has a tiny little narrow back garden , so it's ideal. One of the thujas possibly.
Yew is a good evergreen, and beech or hornbeam can be kept very narrow, while still getting height. Lonicera [the shrubby ones] will stay neat, although they need shaping from the start to get an even look to them. Even good old privet would the job, as it doesn't mind being hacked back into shape.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
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Can't recall the name of the one my neighbour has but it'll come to me - it's around 18 inches in depth, six or seven feet high, and is very smart. She has a tiny little narrow back garden , so it's ideal. One of the thujas possibly.
Yew is a good evergreen, and beech or hornbeam can be kept very narrow, while still getting height. Lonicera [the shrubby ones] will stay neat, although they need shaping from the start to get an even look to them. Even good old privet would the job, as it doesn't mind being hacked back into shape.
I live in west central Scotland - not where that photo is...