Seven hours of full sun is plenty, but two feet away from the house is entirely insufficient.

To determine how much room you need, research the expected mature size (height and canopy spread) of your chosen variety. To place your tree, divide that canopy width by half then add a couple of feet.

There's nothing uglier in the front of a home than a butchered Crape Myrtle.

Indeed, a crape myrtle with its nature of developing multi-trunks and a massive deep root system is never a foundation planting.

queen, rhizo gave you a very good formula involving some research for you to do.
crapes bloom all the way around and after the rain, the branches weep down further.
If all your blooms are at the front of the plant because it's normal growth pattern is impeded by a house wall and its roots are sharing water with foundation shrubs you're going to FORCE that crape to set stabilizing roots toward your foundation.

Crapes need to be accessible for proper pruning of crossed branches. Amid shrubs, you cannot give the best care to this flowering tree.
And, the feeding materials that a crape uses to promote the best bloom may not be the same as what your hedge shrubs need.

I don't know how many other reasonable, logical ways to dissuade you from planting a crape in and among a foundation border of shrubs.
Yes I do....when you realize your mistake you will have to remove ALL the shrubs in order to dig deep and wide enough to remove the dying crape myrtle.
If you don't dig deep enough, it grows back.

That's why it is frequently used as a road median tree.
When it's run over and broken, it grows back (shorter and wider).

So what if I were to select a smaller variety? Like a 10 ft'er?

FYI, we have a few crape myrtles at the corners of our back patio...about 10ft away from the house...and some branches are still hitting the side of the house. They need plenty of room.

Thanks guys for the info. I ended up planting a "purple cow" crape in the space.

I run along the James River parks area daily. Take a walk around the Church Hill (21st and Franklin) area. There are several awesome restaurants, and an incredible bakery called Proper Pie. Anyways, just about every renovated house in the area has mature, non-dwarf crape myrtles right up front against the building.

I know this is an old thread, but maybe someone can benefit from my experience. We have several crepe myrtles next to our house/patio, and one on other side of house, near where we park our white truck. I love them - they say "summer" to me but --- they are messy! I get little parts of flowers all over the patio, esp. after it rains, and have to sweep frequently. The droppings also stain the hood of our white truck. And they do spread quite a bit and droop more when rain makes the flowers heavy and branches bend down - and sometimes break. We have to prune back the branches nearest the house to keep them out of the gutters.

So I've learned - plant them where you don't park and not near the house!

And nowhere near where you might want to garden in the future. Damaged/broken roots start sprouting new foliage, suckers, indefinitely.