Kia ora e te Lemmy whānau!

We've just moved into a new build, which hasn't been landscaped, and I'm at a loss for what to do immediately next to the external walls.

I've seen a few options around town, but I haven't found a good resource for actual recommendations. I've seen:

• river stones/gravel surrounding the foundation for ~30 cm
• plants against the walls (e.g. griselinia, lancewood
• driveway (concrete/asphalt)

I know I need to direct drainage away from the foundation, but can I plant grass (or similar plants) right next to the walls? Is there a standard rulebook I can refer to?

Any help would be appreciated!