Review is based on our experience of two staying...it can accommodate a lot more easily.
Great location and amenities all nearby at this place in the village of Ericeira. The beds are comfortable and kitchen well appointed with dishes, glasses, pots and pans, Nespresso, toaster, kettle, microwave, cooktop, and oven. Other appliances-small refrigerator, freezer, dishwasher and washing machine, which had cleaning supplies and vacuum available as well during our stay.
I would note the following for your planning, you'll need coffee/tea, spices, cooking oil, and paper towels, hair conditioner and some extra hand soap for your stay, but otherwise you have everything you need.
There's two bathrooms, one is a half bath upstairs (sink and toilet), the other is a 3/4 bath (small shower stall, sink vanity and toilet. If you're a person of size, you may find the shower challenging, but it was great for us. Lots of great hot water and excellent water pressure too.
Spiral staircase was fun, but if you're one with mobility issues, they might be tricky.
There's also a dehumidifier in the house and I advise you use it. Being familiar with living by the sea back in the US, we swear by dehumidifiers. We were fully expecting some humidity in a house, especially if the windows haven't been opened in a while. You may notice an odor when entering the house, it's from the home being older and humidity of having a house by the sea. We just get open up the windows to get some airflow and plugged in the dehumidifier and problem solved. There didn't appear to be any fans, which could of been nice to help with airflow/ventilation in the house, but the weather was ideal while we were there and found the temperature very comfortable within the house.
The house is overall super comfortable and an ideal location if you want to be in the middle of it all in the village.