How old is too old? And....

[gcarpenter]

If a laundry mat is at least 20 yrs old, and the facility is no longer operating, is it worth investing in renovating the existing building or demolishing it and starting over?

Also, how do you determine the potential profit of a coin-op laundry facility?

[RWSmith]

I would keep the existing improvements and add too them if needed.
You will need 400 to 600 Amp 3 phase power, a 1.5 to 2 inch water line, a 6 or 8 inch drain line, and a sufficent gas line.
Dryers need openings for make-up air and exhaust ..
Your equipment distributor should be able to help you with the layout and utility requirements.
The easy part is building the laundry the hard part is estimating the $$ volume.
You can make an "educated" guess based on the revenue of the surrounding laundries.
Turns per day (TPD) is another method you can use to estimate your gross revenue.
Good-Luck