Louis L Buttermark & Sons Inc
16 New Dorp Ln, Staten Island, NY 10306, USA
Louis L Buttermark & Sons Inc is a licensed MP plumbing contractor based in Staten Island, NY. They provide medical gas systems for hospitals and universities, commercial plumbing, renovations, RPZ testing, water heater installations, boiler work, and radiant floor heating. The company also handles residential repairs and commercial overhauls, including notable projects such as St. Patrick's Cathedral restoration and NYU medical facility upgrades. As a second-generation business, they serve the five boroughs of New York City.
Summary by ServHom, based on this business's website and public records
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From public NYC records (DOB), last checked July 15, 2026. Status can change, so check the official source for the latest.
All licenses on file
Every NYC DOB license type found for this business, current and historical.
- Journeyman PlumberActive (4)
- Master PlumberActive (3)
- Fire Suppression ContractorActive (2)
Location
Areas served: Staten Island, Manhattan, Brooklyn, Queens, The Bronx
Services & specialties
General Plumbing
Water Heaters
Backflow & Water Treatment
- -Backflow Prevention Testing & Installation
- -RPZ Installation & Testing
Gas Services
Heating Systems
New Construction & Renovation
Commercial & Specialty
More Services
- -Facility expansion plumbing
- -School plumbing upgrades
- -Retail space plumbing upgrades
- -Custom piping systems and commercial fixtures
Specialties
- -Residential repairs
- -Commercial overhauls (hospitals, schools, landmark buildings)
- -Medical gas systems for hospitals and universities
- -Notable project: St. Patrick's Cathedral restoration
- -Notable project: Staten Island Mall expansion
- -Notable project: NYU medical facilities (emergency department upgrades, medical gas systems)
Brands serviced
Service area & hours
Areas served
Team & company story
Our story
- -Founded in 1961 by Louis L. Buttermark; now a family-owned, second-generation business run by his three sons.
The details in this section are sourced from the business's own website and reflect what they publish about themselves. They are not independently verified by ServHom. License, M/WBE, and bonding status above come from public NYC records.
Frequently asked questions
How can I check if Louis L Buttermark & Sons Inc's plumber license is valid?
Louis L Buttermark & Sons Inc holds a Master Plumber license #0000817 issued by the NYC Department of Buildings. You can confirm this license on the NYC DOB licensee search at a810-bisweb.nyc.gov.
What is the Google review rating for Louis L Buttermark & Sons Inc?
Louis L Buttermark & Sons Inc has a rating of 3.20 stars based on 35 Google reviews. This average comes from the individual star ratings submitted by customers on Google and is updated as new reviews are posted.
Where does Louis L Buttermark & Sons Inc provide plumbing services?
Louis L Buttermark & Sons Inc is based in Staten Island and serves customers throughout Staten Island as well as all five boroughs of New York City. They handle both residential repairs and commercial projects across that area.
Is Louis L Buttermark & Sons Inc a family-owned business?
Louis L Buttermark & Sons Inc is a family-owned plumbing company. The business operates under family ownership, with management and operations led by the Buttermark family, and it is based in Staten Island.
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Trust & Verification
License status is drawn from public licensing records; ratings are from Google and Yelp. Other details (services, specialties, and the company description) are sourced from the business's own website, last crawled July 15, 2026, and are not independently verified by ServHom.