I think step number one is to acknowledge that he may not be as concerned about maintaining the home as you. I live alone, and to be honest, I really don’t care that my place looks like a hurricane just hit it. Or at least, I don’t care enough to spend time on it since I have a huge list of more important things to get to.
If that’s the case, I’m not suggesting he shouldn’t have to do his share of house maintenance. I’m just saying that if you can acknowledge it’s not as important to him, you two can have an honest conversation about it and come up with a strategy that works for both of you. For example, there might be something that is important to him that involves you where you aren’t as concerned, and that can be a springboard for some give and take.