The Three Diamond Door

211 Knickerbocker Avenue, Brooklyn, NY 11237
American
Last inspected: Mar 28, 2026
64
Score
Medium Risk NYC Grade: Pending

Inspectors have visited The Three Diamond Door four times, with records going back to 2022. The Three Diamond Door was last inspected on Mar 28, 2026. Medium risk typically reflects a handful of issues that inspectors wrote up but didn't deem critical.

Recent visits have produced comparable findings, with counts hovering near three violations per visit.

“Food contact surface not properly washed” accounts for the largest share of issues, appearing two times across the record.

Restaurants in Brooklyn average 77, so The Three Diamond Door trails the local norm. Nothing in the record is alarming, but there's room to improve.

4
Inspections
3
Critical latest
0
Major latest
0
Minor latest
Inspection History
Mar 28, 2026
Cycle Inspection / Initial Inspection
3 critical violations.
View 3 violations
Food contact surface not properly washed, rinsed and sanitized after each use and following any activity when contamination may have occurred.
06D
Raw, cooked or prepared food is adulterated, contaminated, cross-contaminated, or not discarded in accordance with haccp plan.
04H
Food protection certificate (fpc) not held by manager or supervisor of food operations.
04A
64
Sep 21, 2024
Cycle Inspection / Re-inspection
1 critical violation. 2 minor violations.
View 3 violations
Filth flies or food/refuse/sewage associated with (frsa) flies or other nuisance pests in establishment’s food and/or non-food areas. frsa flies include house flies, blow flies, bottle flies, flesh flies, drain flies, phorid flies and fruit flies.
04N
Establishment is not free of harborage or conditions conducive to rodents, insects or other pests.
08A
Non-food contact surface or equipment made of unacceptable material, not kept clean, or not properly sealed, raised, spaced or movable to allow accessibility for cleaning on all sides, above and underneath the unit.
10F
78
Jun 16, 2023
Cycle Inspection / Initial Inspection
3 critical violations. 1 minor violation.
View 4 violations
Filth flies or food/refuse/sewage associated with (frsa) flies or other nuisance pests in establishment’s food and/or non-food areas. frsa flies include house flies, blow flies, bottle flies, flesh flies, drain flies, phorid flies and fruit flies.
04N
Raw, cooked or prepared food is adulterated, contaminated, cross-contaminated, or not discarded in accordance with haccp plan.
04H
Evidence of rats or live rats in establishment's food or non-food areas.
04K
Establishment is not free of harborage or conditions conducive to rodents, insects or other pests.
08A
61
Mar 24, 2022
Cycle Inspection / Initial Inspection
1 critical violation. 1 minor violation.
View 2 violations
Food contact surface not properly washed, rinsed and sanitized after each use and following any activity when contamination may have occurred.
06D
Plumbing not properly installed or maintained; anti-siphonage or backflow prevention device not provided where required; equipment or floor not properly drained; sewage disposal system in disrepair or not functioning properly.
10B
82

Frequently Asked Questions

When was The Three Diamond Door last inspected?

The most recent health inspection at The Three Diamond Door on file is from Mar 28, 2026. The public record contains four inspections in total.

What is the most common violation at The Three Diamond Door?

Across the inspection record, “food contact surface not properly washed” has been cited two times, more than any other issue at The Three Diamond Door.

How does The Three Diamond Door compare to other restaurants in Brooklyn?

The Three Diamond Door most recently scored 64 out of 100, which is lower than the Brooklyn average of 77.

Has The Three Diamond Door's inspection record improved over time?

Results have been roughly steady. Inspections at The Three Diamond Door have averaged around three violations per visit across the recent record.

What does a medium risk rating mean?

A medium risk rating at The Three Diamond Door means the most recent inspection turned up a handful of issues that the health department wrote up but did not classify as critical.

How often is The Three Diamond Door inspected?

Based on the inspection history on file, The Three Diamond Door is inspected roughly once per year on average.