Do I need a permit to build a concrete walkway?

[Doanh Mai]

Hi all,

I am trying to make improvement to my building in Manchester, NH and building a walkway using concrete. A lady came by today while we were working building a casing and start taking pictures without saying anything. I was like what are you doing? She claims she is from the city of Manchester, (this is at 6 pm) and presented no credential. She was saying this kind of work requires a permit and I could get fined if I continue. She was also saying neighbors complains of noise but we don’t work past 8 pm. We are scheduled for concrete pour tomorrow but I am not sure if I should cancel it for reason below:

1) temperature is dropping soon if I delay and concrete might not set right.

2) my wife is giving birth sometime next week which results in further delay and I just wanted to get this project done with.

3) winter is coming and if I don’t finish the walkway, hard for tenant to shovel, ice forms and it’s dangerous.

What do you think I should do, delay or move forward with the concrete pour?

Best