A guy contacted me about doing the surface prep and planting grass on a new construction. The original builder did a pretty good job with the dirt work and there's not much construction debris left and there's no major dirt moving to be done. I plan on box blading the area with my tractor and spreading topsoil on it. The original dirt isn't very good and has a lot of gravel in it. I haven't figured up how many yards of dirt I'll need but I'm guessing 3-4 tri axel truck loads. I pay $200 for the dirt but I'll probably mark that up to $250. So that's appropriately $1000. It shouldn't take more than a day so I'll probably charge between $500-750 for labor. That's just for the surface prep. How much should I charge for the seeding and straw? He asked for a quote on sod but my numbers there are coming to about a dollar a foot so I seriously doubt he'll go for that.
Your price for surface prep is way too low
Ideally you should install 4" of topsoil for anew lawn
I guess you could get away with 2"
So you're between 230 and 115 cubic yards of soil
A full sized dump truck will transport 10-15 cubic yards depending on model
So at a minimum your looking at 11 loads of topsoil
That's $2,750 just for soil and you haven't spread it yet
If it's not completely nasty a crew with the right training and equipment should be able to do that work in a day
8 machine hours at $90 = $720
1 laborer 8 hours at $60 = $480
Sometimes depending on obstacles in the lawn and debris handling you could need a second laborer
So could be another 480
There will be debris (like vegetation and rocks mixed with soil ) that needs to be hauled off so figure another $500 for debris disposal
That's $4,950
Lawn is now ready for seed
Figuring seed in your area isn't really complicated use whatever is popular plus mulch and fertilizer... to have it hydroseeded you're propbably talking around .10 a square foot. Mark it up to .12 unless you're doing it yourself
So $2,160.00
That's $7,110.00, which comes out to a touch over 39 cents a square foot
That gravelly soil needs to be covered up
So like I said you'll want a minimum of 2"
But I suggest 4 inches
Seed n straw will be more expensive than hydroseed unless you have a straw blower
Call around someone is doing a hydroseed business near you and will come over and shoot it for you.
Lowest you should be on that job ... cut a couple corners , do it quickly ... would be around $5,800... or around 32 cents a square foot.