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Don Thornberg Building CorpSiding contractor in Syosset, NY

Don Thornberg Building Corp is a siding contractor at 54 Whitney Ave, Syosset, NY 11791. Open Monday to Saturday.

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Call (631) 786-3689Website ↗

Key facts

Key facts about Don Thornberg Building Corp
Address54 Whitney Ave, Syosset, NY 11791Get directions
Phone(631) 786-3689
Websitethornbergbuilding.com
HoursMonday: 9 PM – midnight; Tuesday to Saturday: 12 AM – 5 PM

Trades

Each trade shows the evidence we matched it on.

  • Sidingmain tradeGoogle main category
  • Roofingadditional Google category
  • Plumbingadditional Google category
  • Electricaladditional Google category
  • Paintingadditional Google category
  • Flooringadditional Google category
  • Fencingadditional Google category
  • Decks & Patiosadditional Google category
  • Windowsadditional Google category

Service area

Serves Syosset and 11 towns within 40 miles: Jericho, Oyster Bay, West Hills, Plainview, Hicksville, Cold Spring Harbor, Huntington, Old Bethpage, Melville, Huntington Station and South Huntington.

Based in Syosset, NYView on map

Opening hours

Opening hours for Don Thornberg Building Corp
DayHours
Monday9 PM – midnightevening
Tuesday12 AM – 5 PM
Wednesday12 AM – 5 PM
Thursday12 AM – 5 PM
Friday12 AM – 5 PM
Saturday12 AM – 5 PM
SundayClosed
  • Open evenings (after 6 PM)
  • Open Saturdays
  • Open Sundays — no

Typical siding prices

Typical siding prices
JobLowTypicalHigh
Siding replacementPer house: typical range of customer-reported projects. US national range × 1.18 Middle Atlantic factor (2025 Cost vs. Value Report)$6,560$13,670$20,910

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

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Questions about Don Thornberg Building Corp

What are Don Thornberg Building Corp’s hours?

Don Thornberg Building Corp is open Monday to Saturday. Its listed hours are Monday, 9 PM – midnight; Tuesday to Saturday, 12 AM – 5 PM. On Saturdays it is open 12 AM to 5 PM and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does Don Thornberg Building Corp serve?

Serves Syosset and 11 towns within 40 miles: Jericho, Oyster Bay, West Hills, Plainview, Hicksville, Cold Spring Harbor, Huntington, Old Bethpage, Melville, Huntington Station and South Huntington. The list is based on the business's location and the usual service radius for siding. Confirm your address is covered when you call.

How do I contact Don Thornberg Building Corp?

Call Don Thornberg Building Corp on (631) 786-3689. The business is at 54 Whitney Ave, Syosset, NY 11791. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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