Multifamily rents Dallas, Houston and Austin are clustered in the same rent range for high-end rentals.

HOUSTON—High-end rentals are more expensive, but how much does the price of luxury vary across the US when it comes to rents? The national average rent in a high-end building is around $1,640 per month, about $490 more than an apartment in a low-end building, according to apartment search website RENTCafe.