Three questions, about sixty seconds, and a ballpark you can actually plan around — built on the same pricing structure as our written proposals. Pick your roof, and the estimator does the math.
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Roof Cost Estimator
Three questions, about sixty seconds, and a ballpark you can actually plan around.
1. What kind of roof?
Pick the material closest to your plan. Every ballpark below includes a full tear-off of the old roof — that’s how we do it, and it’s baked into the numbers.
2. How big is your roof?
Roof area, not floor area — pitch and overhangs add roughly 15–30%. Most single-story homes run 1,200–2,000 sq ft of roof; most two-story homes run 2,000–3,200.
1,000 sq ft4,000 sq ft
3. How steep / complex?
Low & simple is a walkable roof with one or two planes. Steep or cut-up means multiple planes, valleys, and hips — more labor, more flashing, more time on the roof.
Your Ballpark
$12,100 – $14,800
Asphalt Shingle · 1,800 sq ft · Standard pitch
Call 310.880.9718
Or request your free estimate online →
Ballpark only — pitch, layers, decking condition, and city permits all move the real number. This is a planning range, not a bid. Call for a free roof inspection and a fixed written estimate.
How This Roof Estimator Works
The math is simple, and it’s the same math behind our written proposals. Pick a material and the estimator starts with a per-square-foot rate for a full tear-off and replacement. Your roof size scales it, and the pitch/complexity step adjusts it — a low, simple roof runs about 5% under the base rate; a steep or cut-up roof runs about 15% over, because it takes more labor, more flashing work, and more time. The range shown is ±10% around that number.
The material rates come from real Mars Roofers proposals — the same pricing structure you can read line by line in our sample estimates. The roof cost guide explains every factor that moves a real bid off the ballpark.
A full tear-off is included in every ballpark. Mars almost always tears off rather than roofing over the old roof: a roof-over hides the deck, and the deck is where the surprises live. Tearing off lets us inspect and replace damaged decking, install underlayment on a clean surface, and give you a roof system that was built as one system — not a new roof sitting on an old roof’s problems. Tear-off, hauling, underlayment, flashing, and standard permit costs are all in the number above.
What the ballpark can’t see is your actual roof: how many layers are on it, what the deck looks like underneath, and what your city’s permit office requires. That’s what the inspection is for — and it ends with a fixed written estimate, not a range. Call 310.880.9718 when you’re ready for your roof’s real number.