The Three Diamond Door

• gradeGrade A ⏳
• grade postedSeptember 21, 2024
• inspection score23 pts
• critical violations3
• last inspectedMarch 28, 2026 →
• address211 Knickerbocker Avenue, Brooklyn 11237
• cuisineAmerican
• phone7185766136

Is The Three Diamond Door clean?

The Three Diamond Door currently carries Grade A ⏳ from NYC Department of Health and Mental Hygiene (DOHMH). It was posted on September 21, 2024 and still stands. The place has been inspected again since — on March 28, 2026 scoring 23 points — but NYC Department of Health and Mental Hygiene (DOHMH) has not ruled on that visit, so no new grade has been issued. Inspectors wrote up 3 critical violations — the kind most directly linked to foodborne illness. On Cooked's ladder the posted grade reads clean 😇; the numbers above come from the newer visit.

What did inspectors find at The Three Diamond Door?

These are the violations recorded at the most recent inspection on March 28, 2026, in plain English, with the city's own wording underneath.

• 📋no certified food supervisor on dutycritical
  Food Protection Certificate (FPC) not held by manager or supervisor of food operations.
• 🧽surfaces not properly sanitizedcritical
  Food contact surface not properly washed, rinsed and sanitized after each use and following any activity when contamination may have occurred.
• 🔪cross-contamination riskcritical
  Raw, cooked or prepared food is adulterated, contaminated, cross-contaminated, or not discarded in accordance with HACCP plan.

When was The Three Diamond Door last inspected?

The Three Diamond Door has 3 inspections on record going back to June 16, 2023, averaging 18 points.

The Three Diamond Door vs Bushwick North

Bushwick North runs 77% clean across 342 tracked restaurants — 226 clean, 17 mid, 50 cooked.

Against the 342 spots Cooked tracks in Bushwick North, this one comes out cleaner than 29% of them.

Other spots in Bushwick North

• A Santa Ana Deli & Grocery
  clean · January 21, 2025
• A Union Pizza Works
  clean · September 13, 2024
• ⏳ Lot 45
  cooked · December 1, 2023
• A The Johnson's
  clean · July 1, 2026
• A No 1 Restaurant
  clean · July 31, 2026
• B Bunna Cafe
  mid · August 6, 2025

See every restaurant inspection in Bushwick North →

How New York grades restaurants

New York City health inspectors score violations in points, and lower is better: 0–13 points earns an A, 14–27 a B, and 28 or more a C. Every restaurant is inspected at least once a year, and the letter has to be posted in the window. A restaurant that scores 14 or more on the first inspection of a cycle does not get a letter right away — it stays “Grade Pending” until a re-inspection settles it, which is why some spots here show an hourglass instead of a letter. Cooked only ever shows a letter the city actually posted; we never infer one from a score.

Read the New York ratings guide →

Inspection findings and available history come from the authority’s published records. Cooked checks daily; publication can lag behind an inspection. Read the date on each result and check the official source for newer information.

Source: NYC Department of Health and Mental Hygiene (DOHMH) via NYC Open Data. Cooked refreshes this data daily — this listing's most recent inspection is dated March 28, 2026. Inspection results describe one moment in a kitchen's life, not a permanent verdict.

check your own block 📸

Cooked covers 10 cities on official inspection data — see who's clean, mid, or cooked near you.