We originally were renting a 2 bedroom flat and then bought a townhouse.
I think pretty much its just getting the place child proofed as the get older.
Where we are now we have stairs inside so have put gates in, any stairs leading in or out to places you can help them with til the get old enought to learn how to safely step up or down.
Just check too in places the access to kitchen. At our old place the way it was it was easy access for Ash, and we couldn't block off so if we ever had to use the oven we had to really watch her so she didn't touch it. Our new place we've been able to block off the kitchen so she can't get in there.