Roof Cost Estimator

Frame it and cover it — priced together. Pick framing approach, roof style, pitch, and roofing material; get truss counts, sheathing, surface area, and an itemized 2026 estimate. Choosing between styles or materials first? See the roof framing guide and the roofing materials comparison.

Building & Roof

Building length (ft)

Trusses run across the width, spaced along the length.

Building width / span (ft)

Overhang per side (in)

Framing

Roof style

Pitch

Roofing material

Adjust unit prices (CAD, editable)

Standard truss, per ft of span ($)

A 24-ft gable truss ≈ $215. Hip/gambrel sets cost more (factor applied).

Attic truss, per ft of span ($)

Stick framing ($/sq ft of roof)

Lumber + labour. Set lower if DIY.

Sheathing ($/4×8 sheet)

Asphalt, installed ($/sq ft)

Metal exposed-fastener ($/sq ft)

Metal standing seam ($/sq ft)

Cedar ($/sq ft)

Composite ($/sq ft)

Estimated roof cost (framing + covering)

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Quantities & Cost Breakdown

Item	Quantity	Cost

Refine the rest of the build: see the usable attic room your roof creates in the Attic Space Calculator, price the walls in the Wall Framing Calculator, the base in the Foundation Estimator — or get the whole-building ballpark in the Garage Cost Calculator.

Disclaimer: This is a planning-level estimate using simplified geometry and typical 2026 prices. Truss pricing varies with design — get a free engineered quote from your truss plant. Roofing material prices assume standard installation; complex roofs, tear-offs, and difficult access cost more. Confirm structure and loads through your permit drawings.

How this estimate works

Roof area = footprint (plus overhangs) × the slope factor for your pitch, with style factors for hip and gambrel geometry. Trusses = length ÷ 24" spacing + 1, priced per foot of span (hip sets ×1.15, gambrel ×1.25); attic trusses use their own rate (and see what room you get in the attic calculator); stick framing prices per square foot of roof surface. Sheathing = roof area ÷ 32 (+10% waste; metal over strapping may skip some sheathing — keep it for the conservative estimate). Covering = roof area × your material rate, defaults matching our roofing comparison. Result shown ±15%.