Roofing for a 1,800 sq ft house
Short answer
A 1,800 sq ft house with a 6/12 roof has about 2,012 sq ft of roof — roughly 22.2 roofing squares and 67 bundles of architectural shingles.
Roof area
2,012 sq ft
Squares
22.2
Bundles
67
Est. cost
$9,056–$15,093
Roofing a 1,800 sq ft house: squares, bundles & cost
A 1,800 sq ft house with a standard 6/12 pitch has about 2,012 sq ft of actual roof — the roof is bigger than the footprint because pitch multiplies area. That's roughly 22.2 roofing squares and about 67 bundles of architectural shingles, costing around $9,056–$15,093 installed. The "how many bundles of shingles do I need" answer is your squares × 3 bundles, plus a waste allowance.
Pitch is the number generic roof-area calculators skip. At 6/12 the multiplier is about 1.12×; a steep 12/12 roof is ~1.41× the footprint — so the same 1,800 sq ft house needs meaningfully more shingles and costs more as the roof gets steeper and slower to walk safely.
Material sets the rest of the roof replacement cost. For this 1,800 sq ft roof, budget 3-tab shingles run about $7,044–$11,069, architectural (the default here) sits in the middle, and standing-seam metal can reach $18,112–$32,199. The table below prices every option for this exact house, with typical service life so you can weigh cost against how long each roof lasts.
What drives the cost
| Factor | Effect |
|---|---|
| House footprint | 1,800 sq ft × 1.12 pitch multiplier = ~2,012 sq ft of roof (22.2 squares) |
| Roof pitch | A 6/12 roof is ~1.12× the footprint; steeper roofs add area, labor, and safety cost |
| Material | 3-tab is cheapest, standing-seam metal 2–3× more — see the table below |
| Tear-off & layers | Removing and disposing of old roofing (especially 2+ layers) adds cost |
| Roof complexity | Valleys, dormers, skylights, and chimneys add flashing, cuts, and waste |
| Region & permits | Local labor rates and permit/inspection fees change the total |
1,800 sq ft roof cost by material
| Material | Per square | Total (1,800 sq ft) | Bundles | Lifespan |
|---|---|---|---|---|
| 3-tab asphalt shingle | $350–$550 | $7,044–$11,069 | 67 bundles | 15–20 yr |
| Architectural shingle | $450–$750 | $9,056–$15,093 | 67 bundles | 25–30 yr |
| Standing-seam metal | $900–$1,600 | $18,112–$32,199 | 23 bundles | 40–70 yr |
Architectural shingle (highlighted) is the reference build for the figures above; change material and pitch in the calculator.
Roofing planning tips
- Measure your home's footprint (not living area) and pick your pitch — those two numbers set the roof area for a 1,800 sq ft house.
- Order about 10% extra for waste, and more for a cut-up roof with hips, valleys, and dormers.
- Get itemized bids (tear-off, decking, underlayment, shingles, flashing) so you can compare a roof replacement cost like-for-like.
- Enter your exact footprint, pitch, and material in the calculator for precise squares, bundles, and cost.
Your exact roof
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Frequently asked questions
How many squares of roofing for a 1,800 sq ft house?
About 22.2 squares for a 6/12 roof — the 1,800 sq ft footprint becomes ~2,012 sq ft of sloped roof, plus 10% waste.
How many bundles of shingles for 1,800 sq ft?
About 67 bundles of architectural shingles (3 per square). 3-tab is the same bundle count; metal is sold by the panel.
How much to reroof a 1,800 sq ft house?
Around $9,056–$15,093 in architectural shingles installed. Metal costs 2–3× more; 3-tab a bit less. Confirm with local roofers.