My neighbor has a very large bradford pear tree in their front yard that is planted about 5' from our property line. This neighbor does not trim this tree and the tree has overgrown so much that a large limb protrudes to our drive way over our parked cars. We have asked these neighbors in the past to trim this tree and others in the back yard that over-hang our patio cover and they ignore our request.:mad:

What is neighbor and/or property owner rights and etiquette to trim these trees?

I'm not sure if this is true in all locations, but around here I can trim what hangs over my property.

I'd focus on what's legally OK and not worry about etiquette since the neighbor has ignored your request.

In most areas as a property owner, you own the air space above your property and his tree is "tresspassing" onto your property.

It is very possible ( but I would check with an attorney in your area) that you give them a formal written request. And if they do not cut it, you would have the option of merlely cutting it yourself at the property line, or hiring it done ( but only at your property line) and then if he doe not pay, you should be able to sue him for that cost.

From a personal note, if their tree is over my property line, I merely use my own tree cutter ( I have a manual and an electric one on a pole)

I believe that, legally, you can trim any portion of any tree that overhangs onto your porperty. Check with your local city hall to be sure.

To add to the good answers above, in my area I can cut anything over my property without permission.

I cannot, though, charge him for any of the trimming.

Thank You For All Your Answers. Since I Posted This Question, I Did Further Research And Discovered That, I Can Trim Anything Over My Property Line As Long As It Doesn't Cause Harm To The Tree.
As Far As If His Tree's Branch (which Is About 10" Round) Falls During A Storm Or Other Act Of God, He Is Not Liable To Any Damage Done To My Property Unless I Mail Him A Certified Return Receipt Letter Requesting That He Trim The Tree.

The Letter Is Now In The Mail
Thanks

Just one point here. As you noted, you can trim as long as it doesn't cause harm. And therein lies the rub. Since he has refused to trim himself, I would hire a pro to do the trimming. In that way, they would be liable if any damage was caused to the tree.