I'm in New England area also. My hens are loving the dogloo I bought for them. All four can fit in it comfortably. I also have a cedar dog house that all four can fit into comfortably. They usually use one for laying and the other one is shelter. But honestly, unless the windchill takes it below zero they re usually sleeping outside under the stars.
They also do a fantastic job of not pooping up the laying dog house. I fluff that bedding every day.
I have a doggie pool in the forage pen and the duck "yard". I thought it took up too much room so I got a rubbermaid stock tank (70 gallon) on deep discount. It was so tall that it needed a ramp for them to get into easily. They adjusted to it and they love using the ramp as a sunning spot. For christmas they got a new long n low 50 gallon stock tank that I'll be moving into their pen in the spring. They've been practicing using it on warm days in their forage pen. I'll still use the ramp with it.
I'd recommend thinking about how you want to gather eggs. I'm short and i have to use a garden tool to reach the eggs. It's not too bad but on the days the ground is frozen it sucks having to kneel down to reach them.
I used a self priming hand pump to empty the 70 gallon stock pond before we got a tractor. Now I use the tractor as a powersource to power the pump. We don't have outdoor outlets we can use down by the duck pen yet. I use the duck water to water plants and trees in the orchard so I don't just dump it out.
Personally, I wish I'd gotten two dogloos for them to use. The dogloos have built in ventilation. And they're cool in summer and warm in winter. I just have to be vigilant about keeping the vent snow free.
Our basic pen is a 8x 10 dog kennel,. We used hardware cloth from about 4 feet up the sides down to the ground & stapled it into the ground. We used rabbit fencing to cover the top.
I use straw& oak leaves for bedding but I think when I clean it out in the spring I'm going to switch to shredded mulch. I have a hard time buying straw in my area because it is bought up by the large animal keepers. It costs me between $8 and $12 a bale in the quantities I buy. The best bargain I found was the double size compressed bales sold by TSC. But those are a seasonal product and super heavy to carry.
I wish I'd gotten two of those dog kennels and put them together to make one big pen. Maybe I'll do that this spring.