We can't always control the amount or type of topsoil we must work with, but we can choose top quality grass seed and make adjustments to the chemistry of the soil. With a new home, it's usually necessary to plant the lawn as soon as construction has ended, even if the season isn't conducive to growing grass.
Most people are surprised to hear that fall planting is better than spring.
For one thing, spring plantings face much more weed competition. But more importantly, as soon as spring-planted grass is up and growing, it has to face the rigors of summer heat and dry weather. Fall planted grasses have both the fall season and spring season to grow and mature before facing summer heat. Your lime and fertilizer requirements will be outlined in their written report. Tilling or cultivating wet soil can ruin the soil structure.