Hi, If the pool overlooks a great view and is in a warm area of the foothills or San Roque, it can add value, unless it takes away from the yard and patieo space. I would have to see the yard and location of the pool to give you my best opinion.
The biggest concern I see is with my buyers that have small children, as they always consider the safety issue of the pool .. So, I would suggest if renovating the pool, be sure to address those issues with an automatic cover that can be walked on and a well fenced yard.
Feel free to email or call me directly.