A 30 square roof covers 3,000 square feet of roof surface, and in 2026 it costs roughly $13,500 to $21,000 installed with architectural asphalt shingles, or about $450 to $700 per square. The same 30 squares in metal, tile, or slate runs $30,000 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 $10,500 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.
| Material | Installed cost per square | 30 square roof total |
|---|---|---|
| 3-tab asphalt | $350 to $500 | $10,500 to $15,000 |
| Architectural asphalt | $450 to $700 | $13,500 to $21,000 |
| Standing seam metal | $1,000 to $1,600 | $30,000 to $48,000 |
| Concrete or clay tile | $1,000 to $1,800 | $30,000 to $54,000 |
| Natural slate | $1,500 to $3,000 | $45,000 to $90,000 |
Architectural asphalt is what most 30 square jobs use, so treat $13,500 to $21,000 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.
What a 30 square asphalt roof price includes
An architectural asphalt 30 square roof averages near $16,500 installed, and that total breaks into four parts: materials, labor, tear-off, and the fixed job costs. Labor is the largest single line, running about 55 to 60 percent of an asphalt total. The breakdown below shows where a mid-range $16,500 job goes.
- Materials, about $4,500 to $7,500. Shingles run $90 to $135 per square on their own; underlayment, ice and water shield, drip edge, ridge cap, and nails push materials to $150 to $250 per square.
- Labor, about $7,500 to $12,000. Roofing labor runs $250 to $400 per square for asphalt, which is where the bulk of a 30 square total lands.
- Tear-off, about $1,000 to $4,500. Removing one existing layer of asphalt costs roughly $1 to $2 per square foot. A second layer or a heavy material adds more.
- Disposal and permit, about $550 to $1,200. A dumpster runs $400 to $700 and a roofing permit runs $150 to $500 depending on the city.
Decking replacement is the wildcard. Sound decking stays in place, but rotted sheathing found during tear-off adds $70 to $100 per sheet, which can move a 30 square total by a few thousand dollars.
25 vs 30 vs 35 squares: how the total scales
Total cost rises with roof size, but not in a straight line, because part of every job is fixed. The table below prices four common sizes in architectural asphalt 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 | $9,000 to $14,000 |
| 25 squares | 2,500 sq ft | $11,500 to $17,500 |
| 30 squares | 3,000 sq ft | $13,500 to $21,000 |
| 35 squares | 3,500 sq ft | $15,500 to $24,500 |
Notice the per-square figure quietly drops as the roof gets bigger. That is the fixed cost of the job spreading across more squares, and it is the single point most cost pages skip.
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. A dumpster still costs $400 to $700. The crew still loses part of a day setting up staging and tear-off protection. On a 10 square garage roof those flat costs might add $200 per square; on a 30 square house they add closer to $70. That is why a small roof can quote at $750 per square while a 30 square roof of the same shingle quotes at $500. 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.
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 the most common way homeowners misjudge their 30 square roof cost.
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. 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, adding 15 to 25 percent over 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 adds $70 to $100 per sheet 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 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 $13,500 to $21,000 installed with architectural asphalt shingles in 2026, or roughly $450 to $700 per square. The same 3,000 square feet in standing seam metal runs $30,000 to $48,000, tile runs $30,000 to $54,000, and natural slate reaches $45,000 to $90,000. Totals include tear-off, labor, and disposal.
How much does a 25 square roof cost?
A 25 square roof covers 2,500 square feet and costs about $11,500 to $17,500 installed with architectural asphalt shingles in 2026. That is roughly $460 to $700 per square, close to the 30 square rate because both sizes spread fixed job costs across enough squares to bring the per-square price down. Metal or tile on the same 25 squares costs two to three times more.
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 $2,700 to $4,050 in architectural asphalt, at $90 to $135 per square. Adding underlayment, ice and water shield, drip edge, ridge cap, and nails pushes total materials to $4,500 to $7,500. Materials are only about one third of an installed asphalt total, with labor making up the larger share.
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 $48,000 installed in 2026, roughly two to three times an architectural asphalt roof at $13,500 to $21,000. Metal costs more upfront but often lasts 40 to 70 years against 15 to 30 for asphalt, so the higher price buys a longer service life rather than a lower cost per year.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.