As of September 2026, a full roof replacement in Boise runs about $5,900 to $10,900 for a typical 1,800 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.
Boise has the widest spread of roof ages in the valley, and that is why two Boise quotes for the same square footage can land far apart. A 1920s North End bungalow with a steep pitch and plank decking is a different job from a 1960s Bench ranch at 4/12 or a 2010 Harris Ranch two-story with its first architectural roof. The table below uses the same September 2026 installed rates for every home size; the sections after it explain what moves a Boise bid inside or outside those ranges.
| 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 1,800 square foot home in Boise carries about 22 squares of roof, which is where $5,900 to $10,900 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 Boise home at $5,900 to $10,900 sits inside that span.
Steep pitches concentrate in the North End, Hyde Park, the East End and the Depot Bench, where 1910s to 1950s homes were framed for snow and style. Crews on those roofs need harnesses, roof jacks and more time per square, and the roof's true surface is larger than its footprint. Bench and Collister ranches at 4/12 sit at the other end: walkable, fast and the cheapest slope to shingle.
Older homes near Boise State and downtown often carry two shingle layers, and Idaho code caps a roof at two, so a third layer is not an option: the whole stack comes off. Tear-off and disposal of a double layer is real labor and real dump weight, and it is the line most homeowners in 83702 and 83706 do not expect on the bid.
Pre-war Boise homes were decked with planks, and many started life under cedar shake on spaced boards. Shingles need a solid, nailable surface, so those roofs get re-sheeted with plywood or OSB at tear-off. Plank re-sheeting is the cost line most instant quotes miss in the North End; on 1970s and newer plywood decks it rarely comes up beyond a few replaced sheets.
Boise reroofs are permitted through the City of Boise Planning and Development Services. Homes in the North End and East End historic districts can carry additional design review before a visible roof material change, something few contractors flag until it delays the job. The permit fee follows the city's current fee schedule; ask for it as its own line on the bid. Source: City of Boise Planning and Development Services, Building Division.
Harris Ranch and the newer southeast subdivisions have architectural committees that approve shingle style and color, while the historic districts north of downtown review visible material changes. Neither adds much to the bid, but both add weeks if the paperwork starts after the shingles are ordered.
Foothills homes above Table Rock Road and along the canyon mouths combine long driveways, steep lots and the wind exposure that creases shingles in the first place; material staging and dump trailer placement cost time there. In the North End the issue is mature trees and narrow alleys, which slow both delivery and tear-off. Flat subdivision lots in West Boise are the easy case.
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 Boise are measured from USGS aerial LiDAR flown September 2023 to August 2024, about 16 points per square meter, and Ada 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; Ada County Imagery 2025 (ACHD image service). How the measurement and pricing work and who runs RoofingQuotePro and who pays are on their own pages.
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