Store › Stamp Level 3 (3,001-10,000 sq ft) Stamp Level 3 (3,001-10,000 sq ft) $2,250.00 Review, code check, minor modifications (1-2 rounds), Architectural Stamp. 5 day business day turnaround. Quantity: Add to Cart Added! Review, code check, minor modifications (1-2 rounds), Architectural Stamp. 5 day business day turnaround.