Westlake Hills is sold as one place and behaves like four. The difference between a street that holds value and one that does not is usually topography, not postcode.
Flat land is the scarce thing
The listing will quote lot size. What matters is how much of that lot you can stand on. A level half-acre supports a pool, a guest house and a lawn. A steep one supports a retaining wall and an argument with your builder.
When we value here, usable area carries more weight than total area, and we say so in the file.
Where the boundary runs
School zoning does not follow the neighborhood name, and it has moved twice in a decade. We confirm the current attendance zone for every specific address before an offer goes in, because a buyer who assumed and was wrong has a real grievance.
The quiet premium
Streets with underground utilities trade above those without, by a margin most sellers underestimate. It is not the poles themselves. It is that the same streets tend to have mature trees, wider verges and fewer rebuilds in progress.