A 30 square roof covers 3,000 square feet of roof surface, and in 2026 it costs roughly $15,000 to $24,000 installed with architectural asphalt shingles, or about $500 to $800 per square, based on the $5 to $8 per square foot national range in The Roofing Brief 2026 Roofing Cost Report. The same 30 squares in metal, tile, or slate runs $21,000 to $90,000. The 30 square roof cost below is the whole job, not just the shingles: tear-off, underlayment, flashing, labor, disposal, and permit are all inside the number.
How many square feet is a 30 square roof?
A 30 square roof is 3,000 square feet of roof surface, because one roofing square equals 100 square feet. Roofers price and order material by the square, not the house footprint, so a quote written as “30 squares” is telling you the crew will cover 3,000 square feet including waste. A 25 square roof is 2,500 square feet, and a 35 square roof is 3,500 square feet.
That surface figure already includes the pitch of the roof and the overhangs, so it is larger than the floor area of the house underneath it. See how big a roofing square is if you are converting a measurement into squares for the first time.
30 square roof cost by material in 2026
A 30 square roof costs $12,000 to $90,000 installed in 2026, and the material you pick sets the range far more than anything else. Architectural asphalt sits at the low end, standing seam metal and tile in the middle, and natural slate at the top. Every total in the table is the finished, installed price for all 30 squares, not the price of one square. Each row multiplies the national per-square-foot range in the 2026 Roofing Cost Report by 3,000 sq ft.
| Material | Installed cost per square | 30 square roof total |
|---|---|---|
| 3-tab asphalt | $400 to $600 | $12,000 to $18,000 |
| Architectural asphalt | $500 to $800 | $15,000 to $24,000 |
| Standing seam metal | $1,000 to $1,800 | $30,000 to $54,000 |
| Concrete tile | $700 to $1,900 | $21,000 to $57,000 |
| Clay tile | $1,100 to $2,500 | $33,000 to $75,000 |
| Natural slate | $1,500 to $3,000 | $45,000 to $90,000 |
Architectural asphalt is what most 30 square jobs use, so treat $15,000 to $24,000 as the working number and adjust from there. For the per-unit pricing behind these ranges, The Roofing Brief tracks roofing cost per square by material and region. To adjust it for your own roof, work through the roofing cost calculator method pros use.
What a 30 square asphalt roof price includes
An architectural asphalt 30 square roof lands near $19,500 installed at the $6.50 midpoint of the $5 to $8 range (3,000 sq ft x $6.50). That total covers four groups of cost, and the split between them varies by market and contractor, so ask for an itemized estimate rather than relying on a rule of thumb.
- Materials. Field shingles plus underlayment, ice and water shield, drip edge, starter, ridge cap, and nails. For the shingles alone, Home Depot and Lowe’s listings for GAF Timberline HDZ ran roughly $41 to $54 per bundle in October 2026, so 30 squares (90 bundles, before waste) is about $3,690 to $4,860.
- Labor. Installation is usually the largest single share of an asphalt job.
- Tear-off. Removing one existing layer is included in the $5 to $8 range. A second layer or a heavy material adds more; see our tear-off roof cost guide.
- Disposal and permit. Dumpster and permit fees are close to flat per job and vary by city.
Decking replacement is the wildcard. Sound decking stays in place, but rotted sheathing found during tear-off is billed on top. HomeGuide puts installed decking replacement at $2 to $5 per square foot, about $64 to $160 per 4×8 sheet.
25 vs 30 vs 35 squares: how the total scales
The table below prices four common sizes in architectural asphalt at the same $5 to $8 per square foot national range, so you can see how a 25 square roof, a 30 square roof, and a 35 square roof compare in 2026 dollars.
| Roof size | Roof area | Installed total (architectural asphalt) |
|---|---|---|
| 20 squares | 2,000 sq ft | $10,000 to $16,000 |
| 25 squares | 2,500 sq ft | $12,500 to $20,000 |
| 30 squares | 3,000 sq ft | $15,000 to $24,000 |
| 35 squares | 3,500 sq ft | $17,500 to $28,000 |
Because the table applies one national rate, it scales in a straight line. Real quotes often do not: part of every job is fixed, so the per-square price tends to run higher on small roofs and lower on large ones, as the next section explains.
Why a bigger roof costs less per square
A 30 square roof usually quotes at a lower price per square than a 10 or 15 square roof, because permit, dumpster, crew mobilization, and the minimum crew day are close to flat no matter the size. Spread those fixed costs across 30 squares instead of 10 and the per-square number falls, which is why size-anchored pricing beats a flat per-square rate.
A permit is a permit whether the roof is 12 squares or 32. The dumpster and the crew’s setup time for staging and tear-off protection are also close to flat. On a 10 square garage roof those flat costs are split across a third as many squares as on a 30 square house, so the small roof can quote noticeably higher per square for the same shingle. Anyone pricing a job off a single per-square rate without accounting for the fixed floor will misjudge a small roof high and a large roof low. For the small-roof end of that scale, see our guide to a 15-square roof on a 1,200 sq ft house.
Roof squares vs house square footage
A 30 square roof is not a 3,000 square foot house. Roof area equals the house footprint multiplied by a pitch factor, plus the overhangs, so the roof is always larger than the floor below it. Confusing the two is an easy way to misjudge a 30 square roof cost. If you are starting from floor area instead, see our estimate of the roof cost for a 3,000 sq ft house.
The pitch multiplier does the work here. A 6:12 roof multiplies the footprint by about 1.12; a 12:12 roof multiplies it by about 1.41. A single-story home with a 2,400 square foot footprint and a 6:12 pitch lands near 27 to 30 squares once overhangs are added. A two-story home reaches the same 30 squares from a much smaller footprint. Our 2,000 sq ft roof cost guide shows how that gap plays out between one-story and two-story homes. Before you trust a 30 square estimate, confirm whether the number came from an actual roof measurement or from someone reading the home’s listed square footage. To turn a house size into a real roof number, work through cost to roof a house by size and pitch.
What changes your 30 square roof price
Two 30 square roofs in the same city can quote thousands of dollars apart. Material is the biggest lever, but access, complexity, and condition move the number inside each material band. The factors below are the ones that shift a 30 square total most.
- Pitch and access. A steep or two-story roof needs more staging and slows the crew, so it costs more than a walkable single-story roof.
- Layers removed. Tearing off two existing layers instead of one roughly doubles the tear-off line.
- Roof complexity. Valleys, hips, dormers, and skylights add flashing, cut waste, and labor hours that a simple gable roof avoids.
- Decking condition. Rotted sheathing found at tear-off is billed per sheet or per square foot ($2 to $5 per sq ft installed, per HomeGuide) and is rarely in the first estimate.
- Region and season. Labor rates and permit fees vary widely by market, and peak-season demand can lift quotes. For one high-cost market, see our 30-square roof prices in California cities.
For the national and regional figures behind these ranges, The Roofing Brief compiles the 2026 Roofing Cost Report. To see the same math expressed as a unit price, compare against roof replacement cost per square.
Frequently asked questions
How many square feet is a 30 square roof?
A 30 square roof is 3,000 square feet of roof surface, because one roofing square equals 100 square feet. Roofers use squares to order and price material, so 30 squares means the crew covers 3,000 square feet including the pitch and overhangs. This is the roof surface, which is larger than the floor area of the house beneath it.
How much does a 30 square roof cost to replace in 2026?
A 30 square roof costs about $15,000 to $24,000 installed with architectural asphalt shingles in 2026, or roughly $500 to $800 per square, based on the $5 to $8 per square foot national range in The Roofing Brief 2026 Roofing Cost Report. The same 3,000 square feet in standing seam metal runs $30,000 to $54,000, concrete tile $21,000 to $57,000, clay tile $33,000 to $75,000, and natural slate $45,000 to $90,000. Totals assume a single-layer tear-off.
How much does a 25 square roof cost?
A 25 square roof covers 2,500 square feet and costs about $12,500 to $20,000 installed with architectural asphalt shingles in 2026, or $500 to $800 per square at the $5 to $8 per square foot national range. Standing seam metal on the same 25 squares runs $25,000 to $45,000 at $10 to $18 per square foot.
Is a 30 square roof the same as a 3,000 square foot house?
No. A 30 square roof is 3,000 square feet of roof surface, not house floor area. Roof area equals the footprint times a pitch multiplier plus overhangs, so the roof is always larger than the home below it. A 6:12 single-story home reaches 30 squares from roughly a 2,400 square foot footprint, and a two-story home reaches it from a smaller footprint.
How much are just the shingles for a 30 square roof?
Shingles alone for a 30 square roof run about $3,690 to $4,860 in architectural asphalt before waste, based on Home Depot and Lowe’s listings for GAF Timberline HDZ at roughly $41 to $54 per bundle in October 2026 (90 bundles at 3 bundles per square). Underlayment, ice and water shield, drip edge, starter, ridge cap, and nails are extra, and labor is usually the larger share of an installed total.
Why is my per-square price higher than the quoted range?
Per-square price climbs when fixed job costs spread across fewer squares, when the roof is steep or complex, or when extra tear-off layers and rotted decking appear. A small roof carries the same permit, dumpster, and setup costs as a large one, so its per-square number runs high. Steep pitch, valleys, and a second layer each add labor that lifts the rate.
Does a 30 square metal roof cost more than asphalt?
Yes. A 30 square standing seam metal roof costs about $30,000 to $54,000 installed in 2026, roughly twice an architectural asphalt roof at $15,000 to $24,000. Metal costs more upfront but usually lasts longer, so compare cost per year of expected service life rather than the upfront price alone.
Reviewed by The Roofing Brief Team. Last reviewed October 2026.