where I live in Southern Cal. it would be around $1,000 to have 800sq ft installed ......and that would be with all the soil prep already done-( the area level and ready to lay sod). Other parts of the country would be less. You would have to call around to various landscapers in your area for quotes. If your paying someone to do the soil prep work - the cost will go up considerably
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Sod from a sod farm, not a roll or box store.
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