Yes that is about right for 20 feet of the correct size cable. Yes you could get it for less. It would help to know specifics, like, what charger you are going to use, what spec the cable is (100 amp narrows it to 4 cable sizes...not all of which support 100 amps). Can you trust your electrician? My electrician put in a "100 amp" cable that won't support 80 amps. I had to limit my charger to 72 amps. Ask questions, then check the "electricians" here to confirm. Distance from service box to charger, type of charger, hard-wired or plug (
very important to use the correct plug!} , size of cable, length of run; all matter. There is much discussion of these points scattered about this website.
We can't really answer your question. Your quote seems in the ballpark.
The inspector doesn't look at the work but does sign-off (need this for insurance when the house burns down). You need to have this documented by the township/city. I made sure my electrician used the correct torque on the connections (he had to leave the job to get the correct torque tool) = did everything by the "book". My Lucid and charger are in the garage directly under the bedroom. I roughed-in the charger and breaker box in the garage (electricians don't do this stuff well) but did not understand that he was using the "least" cable he could, instead of what I asked. He was an "expert" on EVs, because he was "thinking about getting a Tesla". I don't know if he's ever installed a charger before; certainly not a Lucid charger.
He apparently did not care/understand that my intention was to use the circuit to eventually "
car-to-house", in which case I would need a proper sized cable (and other equipment). Your quote should specify cable size & length, breaker rating, etc. "Install EV charger" is not a quote. I have to wonder since you did not mention these details which are necessary to know if your quote is reasonable.
I had to run ~75 feet of 100 amp cable to the garage, but the kid used 4 AWG, when he should have used 1 AWG. I did not know, since I checked here after the fact. I would have specified 1AWG had I known.
see cable guide here
Cable size and run adds significantly to the cost.
Again, it depends on what charger you use. You don't need this much power if you intend to charge overnight in one direction. 40 amp chargers are more than enough for this.
Lots of posts on this topic here. Worth your time to find them and sort thru who's the electrician and who's just chiming in. I'm not the electrician.
Congratulations. A home charger will change your life / increase the re-sale value of your home.