The cost to reroof a garage is usually $1,500-$6,500, with many standard asphalt-shingle projects landing near $3,500. Roof size, tear-off, pitch, material, and local labor rates drive the estimate; detached garages may also have contractor minimum charges.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Small one-car garage | $1,500 | $2,600 | $4,000 | About 250-400 sq ft of roof |
| Typical two-car garage | $2,300 | $3,800 | $6,500 | About 450-650 sq ft of roof |
| Asphalt shingles | $4 | $6 | $9 | Per sq ft installed, including typical tear-off |
| Metal roofing | $7 | $10 | $15 | Per sq ft installed; profile and underlayment affect rate |
What a one- or two-car garage roof usually costs
A basic reroof with architectural asphalt shingles commonly costs $1,500-$4,000 for a one-car garage and $2,300-$6,500 for a two-car garage. These totals generally assume standard access, one existing shingle layer, ordinary roof framing, and no major decking repairs. Low-end quotes are more likely in lower-cost markets or where tear-off is minimal; complex roofs and high labor markets can exceed the range.
Roof area is larger than the garage’s floor footprint because of eaves, overhangs, and slope. A simple 20-by-20-foot garage may have roughly 450-550 square feet of roof surface, depending on pitch and overhang. For a straightforward asphalt-shingle replacement, budgeting about $5-$8 per roof square foot is a useful starting point.
Assumptions: U.S. midrange labor rates, common asphalt shingles, normal access, and no structural repairs.
How shingles, tear-off, and labor appear in the quote
Small garage jobs can have a higher per-square-foot rate than a full-size home roof because setup, delivery, and disposal are spread across less area. Ask whether the estimate includes underlayment, flashing, drip edge, and cleanup, rather than comparing only the shingle line item.
| Quote component | Typical price | What changes it |
|---|---|---|
| Shingles and underlayment | $1.50-$4 per sq ft | Shingle grade and underlayment type |
| Roofing labor | $2-$4.50 per sq ft | Pitch, access, and local rates |
| Tear-off and disposal | $1-$2.50 per sq ft | Layers removed and dump fees |
| Flashing, drip edge, and vents | $150-$700 total | Roof edges, wall connections, and vent count |
| Decking replacement | $75-$125 per sheet | Damaged plywood or OSB found after tear-off |
Labor and removal together often make up a substantial share of the total. A rough labor estimate can be checked with ; for example, 10-16 crew-hours at a combined $75-$125 per hour equals $750-$2,000 before materials and disposal.
How roof size, pitch, and materials shift the price
Roofers commonly price by roof area, not garage floor area. A 12-by-20-foot one-car garage might have 260-330 square feet of roof, while a 24-by-24-foot two-car garage may have 500-650 square feet. Steeper slopes, multiple roof planes, dormers, and limited ladder access increase labor because crews move more slowly and need additional safety measures.
Material choice also matters. Three-tab or basic architectural shingles generally cost less than premium impact-resistant shingles. Standing-seam metal often costs more upfront, while corrugated or exposed-fastener metal can be less expensive but varies by finish and installation details. A roof over 700 square feet or a pitch above 6:12 can push a standard quote noticeably above a simple-garage estimate.
Decking condition is a significant unknown. If inspection reveals rot, a roofer may charge $75-$125 per 4-by-8-foot sheet installed, with larger repairs requiring additional framing work. Confirm whether the quote includes a stated allowance or bills for decking only after documenting the damage.
How long garage reroofing takes and what labor covers
A simple detached garage may take a crew of two or three about 4-8 working hours for removal and installation. A larger garage, steep roof, two-layer tear-off, or rain delay can stretch the job to one or two days. Contractors may schedule a small project between larger jobs, so the calendar wait can be longer than the actual work.
Labor typically covers site protection, tear-off, surface preparation, underlayment, shingle or panel installation, flashing, and cleanup. The quote may not include replacing structural rafters, repairing fascia, moving stored items, or disconnecting electrical equipment. Clarify the crew’s scope and the hourly or per-sheet rate for concealed repairs before work begins.
How local roofing rates change garage estimates
Regional labor, disposal fees, weather, and contractor availability affect small-job pricing. A garage reroof in a high-cost metro area may run 15%-30% above a comparable job in a lower-cost rural market. Areas with frequent storms or short roofing seasons can also see elevated demand, while remote locations may incur travel or delivery charges.
For a two-car garage with about 550 square feet of roof, a basic asphalt-shingle estimate might be $2,500-$4,500 in a lower-cost market, $3,000-$5,500 in many midrange markets, and $4,000-$7,000 in an expensive metro or difficult-access location. These are planning ranges, not fixed regional rates. Compare at least three local, itemized quotes using the same roof area and material specification.
When removal, permits, or repairs add extra charges
Removing a second layer of shingles can add roughly $1-$2.50 per square foot, depending on weight, labor, and disposal costs. A dumpster or haul-away fee may be quoted separately, often around $150-$500 for a small project. Replacing fascia, gutters, skylights, or rotted framing is usually outside the basic reroof price.
Permit requirements vary by city and project scope. A like-for-like shingle replacement may not require a permit in some jurisdictions, while structural changes or roof-deck replacement can trigger one. Fees commonly range from $50-$300, but local rules determine the actual charge. Ask the contractor to identify permit fees, disposal, and repair allowances as separate line items.
Which choices can lower a detached garage reroof bill
Keep the project to the existing roof shape and material when the decking is sound; changing slope, adding vents, or switching to a premium system can expand the scope. If the garage has a single shingle layer and the roofing professional confirms local code allows it, ask whether an overlay is appropriate. It can avoid tear-off expense, but it may hide deck damage and add weight, so it is not suitable for every roof.
Move vehicles and stored items away from the work zone, trim branches that block access, and coordinate the reroof with nearby roof work when possible. These steps may reduce setup time or delivery charges, though a contractor should handle roof preparation and safety tasks. Choose comparable quotes by total scope and warranty, not by the lowest headline price.
For a small garage, check whether a contractor’s minimum charge is driving the per-square-foot price. A low-cost bid that omits flashing, disposal, or damaged-deck rates can become more expensive after work starts. Request written material specifications, payment milestones, cleanup terms, and a process for approving unforeseen repairs.