The grass in my yard is Bermuda grass. It is a really tough grass. It has small leaves, and loves 100 degree days and lots of sun. It is very drought resistant and if it is watered enough and has lots of heat and sunshine it will grow like a weed. In fact the joke is if you really want a good stand of Bermuda grass, but a flower bed in, and try to keep it out. It makes seeds if it is getting a little dry or needs some fertilizer. It has runners that grow like bamboo shoots and can climb across concrete or flower bed edges, and make itself at home. Killing it is hard if it is in full sun. It does not much like shade. Overall is it a perfect grass for the area. It goes dormant all winter, and starts growing once it warms up.
It looks like there is little more than a chain link fence between the yards. Likely they just like color roofs, and are friendly neighbors.
Many cities like us to fly their city in the winter to get a leaf off view, They can see into back yards and see if new storage buildings or pools have been installed and "need" to have a property taxes increased. They can see through the dormant trees. In summer the photo looks a lot prettier, but the trees hide what is under them.