As of September 2026, a full roof replacement in Middleton runs about $6,600 to $12,400 for a typical 2,100 square foot home, or $266 to $495 per square installed from 3-tab to designer shingles. Architectural shingles (GAF Timberline HDZ) are $380 to $410 per square. Measured from aerial LiDAR and county imagery, verified on site before any contract.
Middleton doubled in size through the 2000s and 2010s while keeping its small old-town core on the Boise River bench, which leaves it with a two-speed roofing market: pre-1970 homes near old downtown with steep pitches and legacy decking, and large tracts of 2000s architectural-shingle subdivisions north of Main Street toward the Highline Canal now entering their first replacement cycle. The table below applies the September 2026 installed rates to each home size; the sections after it show which side of Middleton spends more of the range on what.
| Home size | Roof area | 3-tab (GAF Royal Sovereign) | Architectural (GAF Timberline HDZ) | Metal |
|---|---|---|---|---|
| Under 1,200 sq ft | 14 to 16 squares | $3,700 to $4,300 | $5,300 to $6,600 | $6,000 to $12,400 |
| 1,200 to 1,800 sq ft | 16 to 22 squares | $4,300 to $5,900 | $6,100 to $9,000 | $6,800 to $17,000 |
| 1,800 to 2,500 sq ft | 22 to 30 squares | $5,900 to $8,000 | $8,400 to $12,300 | $9,400 to $23,200 |
| 2,500 to 3,500 sq ft | 30 to 42 squares | $8,000 to $11,200 | $11,400 to $17,200 | $12,800 to $32,600 |
| Over 3,500 sq ft | 42 to 50 squares | $11,200 to $13,300 | $16,000 to $20,500 | $17,800 to $38,800 |
Roof area is the billable squares a home of that size usually needs, including pitch, overhangs and waste; one square is 100 square feet of roof. Totals are the September 2026 installed rate for each line multiplied by that range, rounded to the nearest $100. Metal spans exposed-fastener panels to standing seam.
This site prices from a partner price book (Bork Roofing) at an all-in rate per square, $380 to $410 installed for GAF Timberline HDZ, covering installation, tear-off of one existing layer, starter strip and drip edge, ridge cap, ice and water shield, standard flashing and pipe boots, disposal, steep-slope labor up to 8/12. Guides that quote a wider span average many bids with many markups.
The number is for the measured roof, not the floor area: a typical 2,100 square foot home in Middleton carries about 25 squares of roof, which is where $6,600 to $12,400 comes from; the estimator measures yours.
Add-ons other guides fold into an average are itemized only when they apply: extra tear-off layers ($45 per square for each existing layer beyond the first); steep pitch ($35 per square on planes steeper than 8/12); decking (2 sheets included, then $95 per sheet); permit (the city's own fee where it is on file, else a $150 allowance).
Outside reference: This Old House, Cost of Roof Replacement in Idaho puts the Idaho average at $7,947 as of May 2026 ($6,117 to $20,703 statewide); a typical Middleton home at $6,600 to $12,400 sits inside that span.
The old townsite along Middle Road and River Road carries the steep pitches of its farm-era houses, harness territory with more surface than the footprint suggests. The subdivisions north of Main Street are moderate truss roofs, walkable and quick, where pitch is a minor line on the bid.
Many homes in the older townsite predate 2000 and have original or once-repaired roofing past its service life, and a fair share of those repairs were a second layer over the first. Idaho's two-layer rule applies inside the city and in the county, so a second existing layer forces a full tear-off to the deck.
Middleton sits directly on the Boise River floodplain, and the above-average humidity grows persistent moss and algae on north-facing slopes, especially on homes backing the river corridor. Moss holds water against the sheathing, so soft decking at the eaves is the common Middleton finding, alongside plank re-sheeting on the pre-1970 homes.
Middleton reroofs are permitted through the City of Middleton Building Department inside city limits, with Canyon County Development Services covering the surrounding unincorporated area. Idaho's two-layer rule applies: a second existing shingle layer forces a full tear-off. The permit fee follows the city's current fee schedule; ask for it as its own line on the bid. Source: City of Middleton Building Department.
Agricultural land surrounds the townsite, and harvest season fills gutters and roof valleys with debris. Blocked valleys and gutters are what turned the June 26, 2026 storm's heavy rain into water intrusion on Middleton roofs, and a bid that includes valley metal and gutter work is doing more than one that does not.
The new subdivisions north of Main Street are flat and easy to stage. River-corridor and old-town lots bring mature trees, outbuildings from the farming years and, along Middle Road and River Road, driveways that flood in wet springs, which can push a delivery date.
Pricing last updated September 2026. Per-square rates are the September 2026 Treasure Valley installed price list for the GAF asphalt lines and metal panel systems in the estimator; every figure on this page is calculated from that list, not typed in.
Roofs in Middleton are measured from USGS aerial LiDAR flown September 2023 to August 2024, about 16 points per square meter, and Canyon County aerial imagery flown 2025 at 3 inch resolution; where LiDAR has not been flown yet, the estimate comes from aerial imagery alone and is labeled that way. A local roofing pro measures on site before any contract. Source: USGS 3D Elevation Program, ID_SouthernGaps_2_D23; Canyon County 2025 3-inch imagery (CC_2025_3in image service). How the measurement and pricing work and who runs RoofingQuotePro and who pays are on their own pages.
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