Posted: 04/10/2015 at 08:07
Preparation is the key. If you want to do it this year I think you'd have to turf - add some Blood, Fish and Bone a week before laying it. It's getting a bit late for seed now (unless you're in a milder area) as it's getting too cold for it to germinate and then it will just rot in winter rain.Since you have a daughter, that would probably be the best solution as it will be usable by next summer. Seed won't, unless you can get it done now and cross your fingers that it will be warm enough to germinate.
Alternatively, just do all the prep now - make sure all the weeds are out or killed off, and get the soil in good heart with some well rotted manure and soil/compost and let it lie over winter. In spring once it's warming up, add some extra compost or soil to get the level right (winter conditions will make it sink and settle a bit) rake it and add some B,F & B, then seed. It's a very cheap of doing it and all GCs and DIY stores offer a good selection of seed. They'll be labelled accordingly.
As Logan says, no weedkiller for six months or so. Any weeds after that can be treated by a Weed and Feed product used as per the instructions. If you turf now, that means you can use one in spring. Good habits re mowing will also give you a good turf - every five or six days through the growing season, and don't scalp it.