Roofing cost calculator

It uses our current installed price list — the same prices as our product pages and written proposals — for a typical roof of the size you enter. Your exact price follows a free inspection that measures the roof and checks the decking.

Tear-off and disposal of one layer of existing shingles, the new shingle roofing system with 10% waste, flashing for one chimney, and the building permit. A second layer of old shingles adds $100 per square (100 sq ft); replacing rotted decking is priced after the inspection.

A rough rule: the roof is about 1.25 × the home's footprint (living area ÷ number of stories), allowing for a typical pitch and overhangs — so a 2,000 sq ft two-story colonial has roughly 1,250 sq ft of roof, and a 1,600 sq ft ranch about 2,000. Use "estimate from living area" and the calculator fills it in; a measured roof report replaces the estimate in your proposal.

Roofers price by the square: 100 square feet of roof surface. A 2,200 sq ft roof is 22 squares, or about 24 squares once the standard 10% waste for cuts, ridges and valleys is included.