I'm a landscape contractor, so here are a few tips
1) Try all clover (as someone else mentioned). Its a plant that fixes nitrogen in the soil, so it doesn't need fertilizing, an will only require mowing once a month at most. If not all clover, nothing wrong with a bit in your lawn (though not in patches), to ease up on the need to feed (and thereby, have a nice green lawn)
2) Soil compaction. If you have a terrible, compacted base, there is no air in the soil for micropre exchange of gasses and water. See if they can/you can aerate it. Builders provide cheap ****** soil, especially in sub divisions, and it makes a lawn super resource intensive.
3) Pick your seed properly. Your average mow and blow outfit, or builder, will supply your typical "sunshine mix". Depending on your sun/shade/water requirements, you may need a deeper rooted variety, a finer fescue, etc....
4) remove old lawn, start over: you can either a) head to quebec and grab some herbicide or b) solarize your lawn (google it) which entails eiher laying a big tarp, or newspaper over the spots to kill, and then re-seeding (which I prefer, its cheaper, and you can tailor the seed)
5) Lastly, your lawn is the most high maintenance thing you have. To keep one looking good, it needs at a minimum a rotation of either a) overseeding b) aeration or c) fertilization. For the few primo lawns I have, we to all three every year, and they look sweet.
If you have any more questions, feel free to ask, or PM me.