Summit Roofing Co · Westchester County
Repairs $800–5,000 · Restoration $15,000–45,000 · New natural slate $50,000–120,000 · New synthetic slate $24,000–48,000
Call (914) 685-8471Written pricing at the design stage. No obligation.
Slate in Westchester County spans three very different numbers in 2026. Repairs on an existing slate roof — broken pieces, a valley, chimney flashing — run $800–5,000. A full restoration (new copper throughout, 10–20% of pieces replaced) runs $15,000–45,000. A new natural slate roof runs $25–45 per square foot installed, or $50,000–120,000 on a typical home; synthetic slate runs $12–20 per square foot, or $24,000–48,000.
The right number depends entirely on what is on the roof now. Most owners of a slate roof are in the repair or restoration column, not the replacement column, and Summit Roofing Co says so in writing after an inspection. These are the ranges projects actually run across Westchester County.
| Line item | Typical range | What drives it |
|---|---|---|
| Repairs (pieces, flashing, small valley) | $800–5,000 | Quarry-matched slate hung with copper nails, copper flashing at a chimney or wall, or a single valley. Most slate leaks live here. |
| Restoration (copper throughout, partial re-slating) | $15,000–45,000 | All valleys, eave, ridge, and step flashing replaced in 16 oz copper; broken and delaminated pieces replaced across the roof. Adds 30–50 years. |
| New natural slate roof | $25–45 per sq ft | Vermont or Buckingham slate over a reinforced deck with copper metal. $50,000–120,000 on a typical 2,000–2,500 sq ft roof. |
| New synthetic slate roof | $12–20 per sq ft | DaVinci or Brava composite over standard decking. $24,000–48,000 on a typical home, 50-year warranties, asphalt weight. |
| Structural reinforcement (natural slate on new deck) | $3,000–12,000 | Only when natural slate goes on framing that never carried it. Determined by an engineer before we quote. |
Repairs $800–5,000 · Restoration $15,000–45,000 · New natural slate $50,000–120,000 · New synthetic slate $24,000–48,000
Copper flashing at the end of its life is a restoration; broken slate from a fallen limb is a repair; soft, delaminating Pennsylvania slate across the roof is a replacement. The inspection decides.
Standard 1/4-inch Vermont slate sits at the low end of natural pricing. Thicker, graduated, or specialty-color slate and Buckingham runs higher.
Slate is installed from staging, not by walking the roof. Steep pitches, turrets, dormers, and tight lots add staging time.
In-kind material and detailing required by a review board can rule out synthetic and push a replacement toward the top of the natural range.
New natural slate runs $25–45 per square foot installed ($50,000–120,000 on a typical home); synthetic slate $12–20 per square foot ($24,000–48,000). Repairs on an existing slate roof run $800–5,000 and full restorations $15,000–45,000.
Up front, yes — but a hard-slate roof with new copper has 50–100 years left, and the asphalt roof that replaces it will be torn off and redone three or four times in that span. Restoration is almost always the better lifetime number.
Natural for restorations, historic properties, and homes with slate-rated framing. Synthetic for new construction, additions, and where weight or budget rule natural out — the look is convincing and the warranties are 50 years.
Yes. Financing is available on restorations and new installations, and the fixed written price means the amount you finance is the amount you pay.
3D design with a written number — no obligation, no pressure.
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