Repair or replace your roof? A Westchester roofer's honest 5-point checklist

After more than thirty years of climbing roofs in Hartsdale, Scarsdale, White Plains, and the rest of Westchester County, we can tell you a useful and slightly uncomfortable fact: about half of the homeowners who call us thinking they need a new roof don't. They need a flashing repair, a few cracked shingles replaced, a chimney rebuild, or a single bad valley addressed. The other half do need a replacement — and putting it off is going to cost them.

The trick is knowing which roof you have. Here's the same 5-point checklist we use on every Westchester inspection, plus what each scenario actually costs.

1. How old is the roof, really?

Manufacturer warranties on architectural asphalt shingles run 30 to 50 years. In Westchester's freeze-thaw climate with heavy tree cover, the realistic working life is closer to 22 to 28 years for a quality install with proper ventilation. If you don't know the age, two ways to find out:

• Check your closing documents from when you bought the house — most home inspections record the roof's apparent age.
• Look for the previous permit record at your town's building department (Greenburgh, Scarsdale Village, White Plains, etc. all keep these online).

If the roof is over 20 years old and you're seeing any of the symptoms below, replacement is usually the right answer. Under 15 years, you're almost always looking at a repair.

2. Is the damage localized or widespread?

Walk around the house and look up. A few missing shingles after a storm, one bad valley, a leak around the chimney — that's localized damage. We can fix that. Repairs in the $300–$1,500 range are common, with the actual leak source diagnosed and corrected the same day.

Widespread damage looks different: granule loss across the whole roof (you'll see it pooling in your gutters), curling or cupping shingles on more than one slope, multiple visible cracks, or shingles that look like they're "buckling" along the lines of the underlying decking. That's a system-wide failure, not a point fix, and we'll usually recommend replacement.

3. Are leaks recurring in the same place?

One leak in one location, traced and repaired, almost never comes back if the work is done correctly. We diagnose by finding the actual entry point on the roof (rarely directly above the stain inside) and rebuilding the flashing, valley, or seal.

What's not normal: leaks that come back six months later, leaks in multiple parts of the house, or leaks where you can find no obvious source. That pattern usually means the underlayment has failed across the roof. Underlayment isn't a thing you can patch — it's the felt or synthetic layer under the shingles, and replacing it requires lifting the shingles, which means at that point you're replacing the roof.

4. What does the deck look like from the attic?

This is the single most-skipped step on a do-it-yourself "is my roof okay?" inspection. Go into the attic with a flashlight on a sunny day.

What you want to see: dry, evenly colored plywood or planks, no daylight coming through, no dark staining, no soft spots.

What's a problem: any visible daylight (means there are gaps), dark water staining in concentrated areas (means a leak that may have stopped but did damage), sagging between rafters (deck rot), or a "wet wood" smell. If the deck is compromised, no amount of new shingles will save the roof — the deck has to be repaired or replaced first.

5. Are you planning to sell in the next 5 years?

This isn't a structural check — it's a financial one. A 17-year-old roof in Westchester is going to come up in every home inspection report. Buyers will use it to either drop their offer by $15,000–$25,000 or walk away. A new roof is one of the few exterior improvements that recoups close to its cost in resale value, and a brand-new roof with transferable manufacturer warranty is a strong listing feature.

If you're not selling for 10+ years, this consideration doesn't apply — stretch the existing roof as long as it'll genuinely last with appropriate maintenance.

What each scenario costs in Westchester County (2026 numbers)

Real ranges from our recent estimates:

• Localized leak repair: $300–$1,500. Most common: chimney flashing, pipe boot replacement, valley re-flash.
• Significant repair (multiple flashings, deck patch, partial shingle replacement): $1,500–$5,000.
• Full asphalt shingle replacement on a typical Westchester home: $12,000–$28,000. Drivers: square footage, pitch, layers being torn off, deck condition, shingle line.
• Designer shingle or metal replacement: $25,000–$60,000+.
• Slate roof restoration or replacement: highly variable, $40,000+ depending on slate sourcing.

The decision rule we use

If three or more of the five conditions above point toward replacement, replace. If only one or two do, repair and re-inspect annually. We give every Westchester homeowner a written photo report with our recommendation — including the cases where we tell you a repair is enough and you don't need us to do anything bigger.

That's what we've built our business on. Some of our best long-term customers are homeowners we told not to spend money with us the first time we came out.

Get a free, no-pressure inspection

Roof replacement is one of the largest exterior investments most homeowners ever make. It deserves a real diagnosis, not a sales pitch. Call (914) 713-5170 or use our contact form to schedule a free Westchester County roof inspection — photo report, written estimate, honest recommendation.