Grade away from a building for a paver patio will be somewhat less of an issue because of drainage afforded by the space between pavers and the base upon which they rest. Your 1/10" per foot grade is probably safe though I used 1/8" per foot because my level gave that indication.

Remove all of the top soil and sufficient sub soil to allow for the base. Base requirement is dependent upon your frost zone and the weight to be set atop. I have a minimum of 5" base plus an inch of sand but below a hot tub I have 10" of base. Paver base need not be different only because it's further from your house.

Now, here is my advise for new construction - WAIT, maybe 3 years. Why, because the foundation backfill needs time to settle completely. Most likely your existing slab is going to shift (unless footings were poured below) during this time so whatever pavers placed alongside will misalign in a season.

Yes, a photo would be helpful, many are posted. And, do you mean 2,000 sq. ft of pavers, not 200? Personally if you're going that large, why save the existing 100 ft of concrete?

I'm linking our patio. When I built it in 1998 (1995 home construction) I set stakes and provided a crowned grade from the house and to both edges. Because I needed a retaining wall, I installed French drains below the gravel,to carry away any water and they have worked great.

Hope this helps. Good luck.

Here is a link that might be useful: Patio

Fnmroberts, thanks a ton for taking the time to give an in depth reply, much appreciated. I did not state the job correctly. 10 x 10 existing slab equaling 100 sq ft and adding an additional 200 sq ft directly next to the slab.

Although waiting 3 years may be the smart thing to do, I am not the type of person that can do that when my mind is set on something :) I am told it's a generational thing.

So if I understand correctly, even with 4 inches of base material spread consistently accross my excavated area (plus sand), my patio will still slope? I feel like it will be exactly even and therefore water will pool on top. Why am I not getting this? Lol.

I understand your impatience to get started - just giving you a "heads-up" that you will most likely need to take up the pavers and regrade. For the area you're now describing that will not be a huge undertaking.

What is the soil like where you live? Loamy or all clay? Rain and meltwater will percolate through the space between pavers and into the gravel base, then be absorbed by the soil UNLESS you're all clay. That's why I installed French drains. I only get very temporary, minor pooling atop when it rains heavily. YES, you should grade the surface away from your home so water is directed away from the foundation.

Rocky and Clay! Developer took all of my topsoil I am guessing. So go deeper and add more of a base? Water pools in this spot on top of the grass I am going to excavate (after a hard rain)