Hey! 
 
I am somewhat new to Sonar (x2) and I wondered if there is a way to create these typical house music build ups. For example a kick that progressively increases in tempo. An answer would be greatly appreciated. 

Welcome to the forum!
Do you know how to make kick drum hits? Do you know how to use soft synths?
Just put many of the kicks in a row and draw a rising tempo change in the Tempo View (I suppose X2  has a view where you can draw tempi) . One option is to keep the tempo stable, and position the kicks in a gradually tightening order.
I know stutter effects, gates, delays etc are also used for that type of events, but that's another story, because there are so many VSTs and ways to accomplish  out there. Regarding those, I don't have the knowledge.
 
 

You want to make what is called a riser. First off, don't fiddle with the tempo, it's not going to give you what you want and will cause life threatening accidents on the dance floor.
A typical riser is 4 measures long and starts with 1/4 note hits, at measure 3 switch to 8th notes, at measure 4 switch to 16th notes, at beat 3 or 4 switch to 32nd notes. Use a snare drum for that. Combine that with a noise filter sweep (another track) or a long rising portamento and you have the classic house riser. The idea is to build excitement before the drop.
Once you've got that bit down mess around with different instruments, gates, drums, etc to come up with your own take on it.
 
Avicii did an interesting take on it in 'I Could Be The One', he put a gate on a rising portamento and routed the snare drum to the side chain to trigger the gate. The result was a nice stuttered effect, you don't hear the snare but you hear its attack on the notes.

TomHelvey
You want to make what is called a riser. First off, don't fiddle with the tempo, it's not going to give you what you want and will cause life threatening accidents on the dance floor.
A typical riser is 4 measures long and starts with 1/4 note hits, at measure 3 switch to 8th notes, at measure 4 switch to 16th notes, at beat 3 or 4 switch to 32nd notes. Use a snare drum for that. Combine that with a noise filter sweep (another track) or a long rising portamento and you have the classic house riser. The idea is to build excitement before the drop.
Once you've got that bit down mess around with different instruments, gates, drums, etc to come up with your own take on it.
 
Avicii did an interesting take on it in 'I Could Be The One', he put a gate on a rising portamento and routed the snare drum to the side chain to trigger the gate. The result was a nice stuttered effect, you don't hear the snare but you hear its attack on the notes.

I'm sorry for my ignorance, but what do you mean by "...and will cause life threatening accidents on the dance floor". Does the sound get regressed in any sort of way or what happens? Sorry again I just want to know everything I can haha. Thanks for the answer BTW! 

ilovetheflip

I'm sorry for my ignorance, but what do you mean by "...and will cause life threatening accidents on the dance floor". Does the sound get regressed in any sort of way or what happens?

Doesn't matter what the dance music form is - disco, trance, house, old time, waltzes, Contra, English traditional Morris dance... extreme accelerating or decelerating tempo changes over a short period of time risk the dancer's internal clock losing sync, neural messages to the appendages therefore becoming confused and semi-random motion of pedatory extensions taking over, frequently with forseeable and undesirable results for the ongoing maintenance of a uniformly vertical posture.

Also known as the dancers being surprised by the tempo shift then falling over their own feet :-)

so do I use the step sequencer drums or what? Im confused.

Sisco1330
so do I use the step sequencer drums or what? Im confused.

You could use the piano roll view for this and draw in the MIDI notes that TomHelvey described above.

I cheat 
 
I lay down quarter notes in the piano roll view. Then copy those and copy them again, offset by an eighth note. Then I copy that pattern and copy it again, offset by a 16th note. Then the same thing, offset by a 32nd note. Then a drag a line across all the velocity tails so the velocity increases over the length of the measures.

that doesnt make any sense at all. if you change the note size it changes everything on the snap grid
 

I'm not talking about the note size. The notes can be short, they're just triggers. I'm talking about the timing of the notes. Also, you can disable the Smart Grid and have a constant snap value.