Something to consider if you're buying off the MLS, SA has a huge military presence. Due to the increased "Summer move cycle" the market heats up quite a bit beginning in March and many places in the suburbs of SA will go at or above asking prices. Another thing I noticed when buying and selling there, if you're not used to negotiating/splitting closing costs, get smart on it. I came from a place where it was unheard of buyers paying sellers Closing. Near SA it was standard to see.
The East/NE part along I-35 and North parts near 281 and 1604 are exploding. As mentioned, the North has a great school district. The Schertz/Cibolo School district is highly sought after as well. I found that you will pay to be in these areas, but the rents are requisite with this demand.
Looking back, I personally wouldn't buy off the MLS again anytime from April - July. I can't stress enough the influence of the military change cycle. The benefit of the military presence is stable rent payments and collection. High character tenants.
I’m watching this market closely. I’m interested to see just how much it can continue to explode. Housing communities and associated retails are going up everywhere. Many suggest its just a matter of time until SA is “connected” to Austin. I think anything near I35 on the east side will continue to grow due to proximity of Austin.
To summarize growing areas I’m familiar with:
North SA
Schertz
Cibolo
New Braunfels (On way to Austin)