O'Sullivan Installs
North Billerica, MA · Since 2008 · Ranked #14 of 25 in Southern New Hampshire
About O'Sullivan Installs
O'Sullivan Installs (since 2008) is a North Billerica, MA-based (serving Southern NH) siding contractor offering siding, windows, doors. Manufacturer credentials: LP SmartSide factory-certified, Alside factory-certified. Holds a 5★ rating across 30 Google reviews.
Siding materials they install
Vinyl siding installationLP SmartSide siding
Strengths
- Manufacturer-certified installer: LP SmartSide factory-certified, Alside factory-certified
- Established 18+ years (since 2008)
- Written workmanship / manufacturer warranty
- Financing available
Worth checking
- Headquartered in MA (serves NH as a service area)
Credentials
LP SmartSide factory-certifiedAlside factory-certified
Warranty
10-year workmanship warranty on siding, windows, and doors
Areas served
Hudson, NH
How we scored O'Sullivan Installs
Our 64/100 reflects four weighted pillars. See the full method for exact weights.
- Customer reputation — 84/100. Aggregated star rating across Google, BBB and Facebook, weighted by review volume on a logarithmic curve — so a handful of perfect reviews can’t outweigh a long, consistent track record, and an established firm isn’t buried by a brand-new one.
- Manufacturer credentials — 50/100. The heart of a siding rating: manufacturer installer programs (James Hardie Elite Preferred, CertainTeed, the Vinyl Siding Institute, LP SmartSide, Mastic/Alside), plus state licensing and liability insurance. Certified crews install to spec and unlock the strongest material warranties.
- Workmanship & warranty — 58/100. Years installing exterior cladding, the breadth of materials a crew works in (fiber cement, vinyl, cedar, engineered wood), and the strength of the written workmanship warranty behind the labor.
- Service & local fit — 62/100. How rooted the company is in Southern New Hampshire, whether financing is offered, and how easy it is to reach, schedule and get a written estimate from.
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