If you want a tube color for a sandy/gritty looking pink, Winsor and Newton has Potter's Pink. I know you asked for a color recipe but thought you might also enjoy having a color which you can add or mix with your regular color mixes for that extra oomph particularly for rendering construction materials like bricks, adobe blocks, etc. The color sits on the surface of the paper so you really get the feel of pottery, sandstone and calcified stains on tiles. Perfect for rendering old houses and gardens. Use sparingly though. I think it works best when you just add a dash of it here and there... as an accent to your regular painting/rendering.
oops, took the picture of it upside down. haha. but you can see how it is a sort of grayed pink, earthy even.
As for rendering this house, I also would take the advice of Egon not to paint it brick by brick. Go for a hint of brick or blocks but don't emphasize the blocks too much or it might overpower the rest.
If I were to try to paint this though, i would go for several mixes of pinks and greys with blues in it like cobalt blue. If you look closely at the blocks, what makes it beautiful is that it is unevenly colored. Some have bluer hues, pinker hues and some even have a yellowish cast to it. Mixing your colors on a butcher's tray or a plate (where the colors would tend to encroach on the other colors' territories seem to yield the best color mixes for greys... I use the muddied color as a base and then add bits of the pure colors to it when suggesting individual bricks.) works best for me when I still used to render Interior design and architectural plates.
For the sand/molded ornaments, just add a bit of yellow ochre or something similar to the colors you would use for your blocks and use stippling to suggest a sandy surface but again, warm it only a little or it might stand out too much against the rest of the building. Looks almost the same color in the picture, just a touch warmer.
This is a beautiful building. Love your eye for architectural details.
Good luck and have fun with the painting!