Neat question! The dinosaurs roamed the Earth during the Mesozoic era, which started about 250 million years ago. Most of the dinosaurs went extinct about 65 million years ago. That was long before humans evolved, so there were no people around and no houses and streets. Other mammals that are our ancestors existed at that time, but they did not become widespread until most of the dinosaurs went extinct. The landscape probably looked different back then with different plants and animals than those that exist today. Some dinosaurs did survive the extinction and still exist today; birds are actually dinosaurs!

Before dinosaurs, the world looked very different! There were no "houses" or "streets" as we know them now. The 7 continents weren't even arranged how we know them to be now! Houses and streets only came about after humans began to populate the planet.

Dinosaurs were around long before any humans roamed the Earth. In fact, the great extinction took place about 60 million years before any humans were around. It's safe to say there were no humans building houses or streets before the dinosaurs came.

There were no humans before or during the time of the dinosaurs, so there were no streets or houses. That being said, how the earth looked has changed drastically through time. At times it has been mostly frozen and at others it has been a hot jungle. Keep in mind that what the earth looked like back in time would be different depending on where on Earth you live. In other words at the time of the dinosaurs Earth would have looked different in what is now California compared to what is now Africa. Here is a link to a explanation of how earth has changed through time and associated artistic representations. It includes what the earth looked liked both before and during the time of the dinosaurs.

There were no houses or streets before the dinosaurs. There were no houses or streets during the time of the dinosaurs, and there were no houses or streets for about 65 million years after the dinosaurs either. Houses and streets are a very recent invention, geologically speaking.