If you've just moved into a house that has a concrete outdoor patio space, and you simply hate it, then get rid of it. The prior owners might have liked the look of a concrete space, but then neglected it over the years, and left it in a terrible state. So if you're not keen on repairing the concrete, and you would prefer to have a nice, green garden, then you should create a list of what you need to do. The first one is something you can do yourself, if you don't mind serious manual labor, but it is best left to professionals. The rest are things you can do as they are simple gardening and landscaping.
Break Up The Old Concrete
The first thing you need to do is to break up the old concrete patio. You can do this with sledgehammers, but it is going to be very labor intensive. Also, you are going to need to protect your home's windows from flying concrete. The last thing you want is to send a chunk of concrete flying through your sliding glass doors. Plus there is the issue of eye protection. This is why it's probably better to hire professional concrete breakers to come in and handle the situation. They might use sledgehammers, but they might also use masonry drills to break up the patio. This will create smaller pieces that can be removed with crowbars. They will also lay protective covering around the area so you don't have to worry about stray pieces of broken concrete flying through your window.
One thing to keep in mind, if you think you're up to the physical labor, is that a concrete patio might have steel rebar inside. So while smashing up the concrete might not be too difficult, you're also going to have to deal with lengths of rebar that were used during the initial pour. If you're not use to cutting steel, this could drive you mad. For professional help, contact a company like Garrett Concrete Cutting, Coring & Sawing Inc - Chino.
Laying The New Lawn
After the professionals have taken away the old, broken chunks of concrete, it's time to get started laying the new seed. You should level the area with a rake and then lay a plastic edging around the area you want to lay need seed in. Inside of this space you will empty bags of top soil and then sprinkle grass seed. You should follow the direction according to the bag as to how you should cover the seed. Some people lay hay on top of the seeds to keep them from blowing away during the initial grow period. You can hire a landscaper to do all of this if you are not keen on transporting sacks of soil and seed, or you can do it yourself. If you do lay the seed yourself, you should get a seed spreader from the home improvement store so that you will end up with even layer of grass seed and not spotty patches and really dense sections.