We don't have a published price list for opener installs specific to Wolf Trap, and we're not going to invent one here. What we can tell you is what drives the number: horsepower and drive type of the unit, whether the existing wiring and header need modification, and whether you want battery backup or smart-app features added. A straight one-for-one swap on a standard door costs less than a job that also involves header bracket work or a rewire, and in a neighborhood built around 1981, the second scenario comes up often enough that it's worth budgeting for.
Wolf Trap's median household income runs well above the wider service area's median of $154,734, and in practice that shows up as more requests for belt-drive units and smart-opener features rather than the base chain-drive model - quieter operation and phone-app control tend to matter more to people replacing a working-but-old opener by choice, not just a dead one.
Ask for a number specific to your door and drive before you commit. We'd rather quote it on-site than guess it here.