Roof Cost Calculator for St. Louis, MO
Wondering what a new roof could cost on a house in St. Louis, MO? Answer four short questions about size, stories, pitch and material, and the calculator turns them into a rough range from published figures. It works in your browser, stores nothing, and takes about a minute.
Using the Tool
The math starts with your home's living space. Dividing by the number of stories gives the footprint. Then the tool adds room for the slope and for eaves that stick out past the walls. The result is an estimated roof area, which the tool multiplies by a low and a high rate per square foot.
Those rates come from the cost rows below. The two St. Louis rows are 2024 figures for the area, and the Missouri rows are 2026 statewide figures. The shingle setting runs from the Missouri average of $4.59 up to $8.00, and the metal setting runs from $8.00 to $13.00.
| Cost row | Figure | Source (year) |
|---|---|---|
| Missouri whole roof, average | about $6,931 (range about $5,392 to $17,837) | This Old House (2026) |
| Missouri asphalt shingles, per sq ft | about $4.59 | This Old House (2026) |
| St. Louis asphalt shingles, per sq ft installed | about $5 to $8 | HomeBlue (2024) |
| St. Louis metal roofing, per sq ft installed | about $8 to $13 | HomeBlue (2024) |
| Missouri slate, per sq ft | about $15.19 | This Old House (2026) |
Slate, tile and flat roofs aren't part of the tool. Slate runs about $15.19 per sq ft as a Missouri average, and a roofer prices slate, tile and flat or low-slope roofs after seeing them.
From Result to Inspection
A range is a start, but a firm price needs someone on the roof and in the attic. Send us a request and we set up a visit. A local roofer handles the inspection, measures the roof and writes up the estimate. There is no cost to send a request.
Ask that roofer early whether your job needs a permit and who files it. In the City of St. Louis, a change of material or more than 25% new sheathing brings a permit into play, and City historic districts add Cultural Resources Office review. In St. Louis County, your city sets the rule. The roof replacement cost guide explains what moves a price, and the repair or replace quiz helps if a new roof isn't certain yet.