Key numbers
According to Remodeling's 2025 Cost vs. Value Report, an asphalt shingle roof replacement in the Mountain region cost $28,475 on average and recouped 71.7% at resale (Remodeling / JLC (Zonda), 2025).
| $4,699 | The average U.S. residential roof repair cost was $4,699 in 2025, up 25% from the prior four-year average. Source: Insurance Journal (reporting Verisk), 2025 |
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On our Denver projects, a new slate roof has typically cost $8,000 to $30,000, which works out to about $400 to $1,500 per roofing square (100 square feet). The low end reflects smaller roofs, relaid slate or lighter products; the high end reflects large roofs in premium natural stone. Material grade, roof size and shape, flashing work, and whether existing slate can be reused move the number most. Use this as a planning range, not a quote; a measured inspection gives you the real price.
What moves a Denver slate price
| Factor | Effect on cost |
|---|---|
| Slate grade and thickness | Thicker, harder slate costs more and lasts longer. |
| Natural vs synthetic | Synthetic slate is lighter and usually costs less. |
| Reuse of existing slate | Relaying sound slate over new underlayment saves the cost of new stone. |
| Roof shape | Turrets, valleys, dormers and steep pitches are slow, hand-cut work. |
| Flashing | Copper or heavy-gauge steel valleys and chimney flashing add cost and are what keep slate dry. |
| Structure | Natural slate is heavy; a house framed for shingles may need reinforcement. |
What Denver’s roofing code adds to the bid
The City and County of Denver’s Roofing Guide and Checklist (updated April 2024) shapes several line items:
- Permit. A repair larger than 10 percent of the roof or two roof squares, whichever is smaller, needs a permit, so a slate replacement is permitted work.
- Reuse. Existing slate, clay or cement tile can be reinstalled if not damaged, broken or deteriorated, and existing flashing must be replaced when it is rusted, damaged or deteriorated.
- Layers. Where two or more layers of any roof covering exist, the roof must be removed to the deck.
- Insulation. If the old roof has no insulation in the cavity and the sheathing is exposed during reroofing, the code calls for insulation above (R-30ci) or below (R-38 flat, R-49 attic) the sheathing. That can be a real cost on older homes.
- Asbestos. Older roofing must follow the state health department’s rules for a certified asbestos inspection and removal, and the city may ask for proof.
Is slate the right call?
Slate can last generations and suits Denver’s historic homes. It is a poor fit if the framing cannot carry it or you plan to sell soon. Compare tile roof costs in Denver, the lighter synthetic cedar option, and metal roof costs in Denver. For a standard shingle roof, see the cost of a roof replacement in Denver.
Get a Denver slate estimate
Integrity Roofing and Painting is veteran-owned and family-run since 1990, an Owens Corning Platinum Preferred contractor with 650+ Google reviews. Our Denver-area office is in Centennial. We will tell you whether your slate can be saved before we price new stone. See our Denver slate roofing page, ask about financing, call (303) 209-0152, or book a free inspection in Denver. We respond the same business day.
Sources: City and County of Denver, Roofing Guide and Checklist (updated 4/11/2024). Price ranges are planning figures, not a quote.
