I would like to know too, allthought i dont think they are made with photoshop

Well, I would like to know too. I mean they do not have to be exactly tutorials in architecture. They could be in graphic design. I just want to know how to start developing that kind of style in your graphics. Also, it would be good if people can recommend me websites where I can find good tutorials for photoshop. Thanks. 

its photoshop or a similar program... Just learn how to work with masks, adjustment layers, layer styles, extract tools and you can just about do anything in your imagination.  Find images or textures you like on the web and get creative with it on photoshop.  If you want to learn how to combine rendered architecture scenes, look up tutorials by pixelflakes etc and adjust to your taste. 

Honestly? look at some photoshop tutorials online all of that is achievable. it's easier to build it in 3D first then depending on the program you can render it in cell shaded/cartoon style or just render it out as clay renders/hidden lines to guide you.

Yes, I highly understand all of your answers. But can you name some great websites or video in youtube to watch for photoshop? Because I have sought sometimes for some and they are not great. I am sure some are better than others. Thanks. 

https://visualizingarchitecture.com/no-render-quick-collage/

Is this helpful?  I think the process is the same, although his outcome is a bit more polished than what you are looking for.  The 'cartoon' feel comes from the colours, shadows and perspective etc not really matching.  They wouldn't have rendered anything in any of those images imo and have just inserted textures and colours over a line drawing.
 

That is pretty nice. Thanks for your help chessterfish. Well, I just want to know because I already have been looking for tutorials. Those tutorials are not exactly about making Cartoonish renderings as I was asking previously. I am just looking for websites about tutorials of great architectural representation in general. That is why I am asking if people can name me a few that they think that are pretty good for them.

These can be pretty technical and advanced, but his results are undeniable.  Probably one of the best renderers out there in my opinion.

http://www.peterguthrie.net/blog/?category=tutorial

a lot of good information here too:

http://www.ronenbekerman.com/

Photoshop is "just" post production which rendering guys consider about 10% of whole process. 

You can get that look with sketchup, related pic is 1/2 day massing study in SkUp for a residential addition done by truly yours 

http://prntscr.com/b81wep

The latest post by Alex is more like the "cartoonish" look you're aiming for:

https://visualizingarchitecture.com/culture-center-intro-illustration/

It is pretty helpful your comments. Now, I am trying to find tutorials of how to make the textures that way. I do not know if it is called "cartoonish." Since when I search for it online. I would like to know how you would call those type of renderings.  

The Cantrell+Michaels books are nice for PS and AI - landscape specific, but the techniques are applicable to this.  You may be more interested in color studies?  As these have robust palettes that make them work better than many.

or, you know, be original...

I was looking at the book. It seems pretty nice. I am interested in color studies for sure. I have done some research of how they call this type of technique. I found this is the best explanation, is a distinctive collage style for rendering, showing the designs in a hypnotic palette of pastel colors and textures. Simultaneously minimal and playful, austere and independent. Basically, I researched about the architects who do these type of graphics instead of 3-D renderings. 

i'd like to know how they can afford the time and money to make all these masturbatory graphics.