Louis L.BUTTERMARK & Sons
Louis L.BUTTERMARK & Sons filed 23 permits with the NYC Department of Buildings in the last two years under Master Plumber #000840, most recently on Oct 9, 2026. It worked most often in Mapleton (3), Manhattanville (2), Oakwood (2), New Springville (2).
What do public records show for Louis L.BUTTERMARK & Sons?
| License | Master Plumber #000840 Issued by the NYC Department of Buildings |
|---|---|
| DOB permits filed (last 2 years) | 23 |
| Permits in the last 12 months | 8 |
| Most recent permit | Oct 9, 2026 |
| Boroughs worked in | Brooklyn (11), Manhattan (6), Staten Island (5), Queens (1) |
| Median estimated job cost on new permits | $55,000 As filed with DOB; not a price quote |
Where does Louis L.BUTTERMARK & Sons work?
- Mapleton · 3
- Manhattanville · 2
- Oakwood · 2
- New Springville · 2
- Crown Heights · 2
- Sunset Park · 2
- Financial District · 1
- Brooklyn Heights · 1
- Carroll Gardens · 1
- New Dorp · 1
- East Midtown · 1
- Flushing · 1
How do I verify this license?
Ask for the master plumber's license number and look it up on the DOB NOW Public Portal or DOB's license search. Every permit in our listings was filed under a DOB plumbing license.
DOB NOW Public Portal (license and permit search)
Source: DOB NOW: Build approved plumbing permits, as of November 4, 2026. Expert Helper is not affiliated with this business, and a listing is not an endorsement. Is this your business? Request a correction or claim it.