Full time housekeepers in Granada, Nicaragua are paid the minimum wage, which is 6,300 to 6,400 córdobas (about US $208 to $212) per month at this point. There's a regulation on this. The minimum wage goes up a little bit from year-to-year.
There are also different alternatives of hiring people on part-time basis and spend a lot less. There are some households that spend 4,000 córdobas (about $130) on housekeepers. If the housekeeper comes in once a week for a day, the rate is around 200 to 400 córdobas (around $7 to $14).
It is a bit tricky to find housekeepers who do a good job. You have to really get to know the person. There are some very nice stories about housekeepers, especially the Nicaraguans because they do get attached to the people they serve and have spent years with. There are also a lot of horror stories. There are some people who come into your house and you pay them, but then they either steal or break stuff. Your satisfaction with the housekeeper's job depends on your demands and whatever you're expecting to get out of their service.
One of the ways to find a good housekeeper is to try to get leads from word of mouth. My family's strategy is to not hire a local from your town. For example, if you are living in Masaya and plan to keep working with a housekeeper for a long time, do not hire someone who is from Masaya. Hire someone from the central part of the country like Matagalpa or Estelí.
Workers from a different part of the country tend to have a better relationship and attachment with their employer because they live in the employer's house, but get to visit their family every 15 days, whereas a person who is local from your town can come into your house at any time and have their whole family running around the city as well so stuff can happen.
To find a housekeeper from another part of the country, you must establish networks and get to know people. You have to ask around a lot, especially from traditional families within the city who can help out. These families would usually have elder members who know people who have a farm in Matagalpa and tell you, "I can get you hooked up with someone who may come into your house who would be willing to travel from Matagalpa, especially if you give them a nice place to stay." Most known families have farms not only in Granada, but also in Matagalpa or other big places and can look for housekeepers.
The network you create is not a formal one and you need to search a bit to get good references, but it's worthwhile to go through the process to get a really good housekeeper who will do quality work helping out in your house.
You have to live in Nicaragua to know how to work it. Most people would advise you to put up a poster and pray that you get someone to help you out with the house. The best housekeepers come from outside the cities, not within the cities.