There aren't any rules dictating when you can or cannot buy a house, but here are a few good indicators to know if you are ready to purchase a home. Keep in mind everyone is on their own journey and your home buying path will differ from everyone else's.
1. You're Financially Stable and Responsible
Buying a house is a huge financial commitment. Many payments are included before, during, and after buying a home. You should make sure you can cover all these costs or have a payment plan ready before home owning.
Having your housing finances figured out will make you a confident and prepared homeowner.
2. You Are Happy and Content with Your Job/Location
Purchasing a home means you're satisfied with the area you are in and would like to stay there for a while. "According to a 2011 study conducted by the American Housing Survey and published by the National Association of Home Builders, the average buyer is expected to stay in a single-family house 13 years before moving." Your job also plays a large part in this decision.
If you are currently looking for a new job and considering other locations, maybe you should wait to settle down in a house. Once you have a job you enjoy and location you're satisfied with, it's a good indicator to start looking for a home.
3. You Know How to Use a Tool Kit
Unlike apartments, a house does not come with a handyman to fix all of your leaks and appliances. And if you're not buying a brand new house, there's a large probability of something breaking and needing fixing. Being capable of fixing things on your own or knowing someone who can help you will be of great benefit.
This isn't a deal breaker when considering buying a home, but it's something to keep in mind. There's nothing you can't learn from a few Youtube videos.