It depends on distance, complexity of install(ie hard ceilings, new work or old work, etc), cat 3 or cat 5 cable, your relationship with the client, and how they want it terminated on the closet side (ie 110, 66, patch panel). Around here in Baltimore md I charge about $75 to $100 per drop and that's just to terminate on a surface mount biscuit or whatever preexisting blocks they have. If it's a dual drop i may do it for $150, given most of the cost is associated with the labor to install the cable. Most of what we have done so far in residences has been small home networks and even at these rates people are pleased and continue to utilize our services and spread the word to their family and friends. Hope this helps