In Carlsbad, the average price of a house is based on the neighborhood where it is located. Also, since this house is a townhouse(has at least one wall attached to another home, and is not a single story), you would want to compare it to other townhomes. In general for homes the same size, age, condition, and in the same general area, a condominium will be the least expensive, then a townhome, and then a detached home.
In California, property taxes will probably be less than 1.1% of the sales price in the first year, unless there are "Mello Roos" taxes. Your property taxes will only increase at most 2% per year if prices are going up, and you can file for an appeal to pay less taxes if prices are going down.
In addition to mortgage and tax expenses, you should also factor in the monthly homeowner's association dues.
The home you inquired about is in a good location, and would make an ideal choice as a vacation home since it is fairly new and would have relatively low maintenance.