Is it a septic system or a cesspool? Jason Brooks The reason I ask is because in Jersey they will not let you sell a house with a cesspool, I was made to replace my functional cesspool with a new septic which I hadnt budgeted for. I would look into this for MA. As far as time to do a septic, I can do a septic in one long day from start to finish if all materials were on site and inspections werent necessary but that is never going to happen. I would plan on a week from start to finish once you get your permits and septic design. I cannot give you a good ballpark on price because there are too many variables. There are two different types of septic systems that I am aware of: chambers and pipe/stone. I do not favor one more than another they are both relatively easy to install (I have installed both kinds). I also do not know the price of stone and sand in MA. It should be easy to figure out once you get your septic design. Dont let a septic intimidate you! If you have access to a backhoe and a transit or laser it is very easy to do! Dig hole, get inspection, put in sand, get inspection, put in stone, get inspection, set tank and lay pipe, get inspection, lay fabric fill in to grade, get inspecton. Sorry for the long winded reply but I dont want someone else to have the problems I did! Good luck!