Roof work prices by the failure and the square, which makes it legible once the vocabulary is clear. Published national guides put minor repairs at $150 to $450, leak repairs at $350 to $1,200, and emergency tarping at $200 to $1,000. Replacement is priced per square foot installed: roughly $3.50 to $6.00 for asphalt shingles and $9 to $16 for metal.
Simi Valley roof money divides by covering before it divides by anything else, so this guide refuses to average them. Tile work prices the underlayment truth: a detail repair where the felt is sound, a lift and relay where it is not, with the relay priced as the fraction of replacement it honestly is. Shingle work prices the system: deck, underlayment, flashing, ventilation, covering. The comparison discipline is identical for both: written scopes with the same lines, judged against the same roof, after someone has actually read the felt or the deck.
What moves a specific quote: pitch and height (labor), how much decking is found failed under the tear off, the component that failed, and timing, since storm weeks price emergency work as emergency work across the whole market.
The decision rule mirrors the rest of the trades: when repairs in a short window total a third to a half of a replacement, and the roof's age says more failures are queued, replacement usually wins. Ask for both numbers in writing, with decking priced per sheet so the tear off holds no surprises.
Prefer to talk later? Leave your details and an independent local pro will call you back. No charge to you, no obligation.
Arroyo Simi Roofing Co is a free referral service. Submitting this form connects you with independent local contractors who provide the work.