Neighborhoods › Clinton Hill › Building 3056806
Interior renovation: Application is filed for a conversion from 17 furnished…, est. $750K
421 Grand Avenue, Brooklyn 07039 · Permit Entire
| Job | B01320919 (5 filings: I1, S2, S4, S5, S3) · Alteration CO |
|---|---|
| Category | interior renovation |
| Estimated cost | $750,020 |
| Scale | 5 → 5 stories; 17 → 5 dwelling units; 7,104 sq ft |
| Work types | General Construction |
| Filed | Nov 25, 2025 |
| Professional | Yang Engineering Llc |
| Building | BIN 3056806 · BBL 3019820010 |
| Official record | DOB NOW job B01320919 |
DOB description
B01320919-I1: APPLICATION IS FILED FOR A CONVERSION FROM 17 FURNISHED ROOMS AND 4 KITCHENETTES TO 5 FAMILY. OBTAIN NEW CERTIFICATE OF OCCUPANCY.
B01320919-S2: THE DRAWINGS HEREIN ARE RELATED TO AN ALTERATION TO THE EXISTING 5-STORY BRICK BUILDING. THE EXISTING BEARING WALL AND WOOD JOIST FLOOR TO REMAIN. REINFORCING EXISTINGWOOD JOIST AS REQUIRED.
B01320919-S4: INSTALLATION OF SPRINKLER SYSTEM AS SHOWN ON PLANS IN CONJUNCTION WITH ALTERATION-CO JOB#B01320919.
B01320919-S5: PROPOSED PLUMBING WORK ON CELLAR, BASEMENT, 1ST, AND 2ND-4TH FLOOR IN CONJUNCTION WITH DOB ALTERATION-CO JOB #:B01320919. CAPPED AN REMOVED BOILER DEVICE# 937206.
B01320919-S3: THE DRAWINGS HEREIN ARE RELATED TO AN ALTERATION TO EXISTING 5-STORY BRICK BUILDING. THE EXISTING RUBBLE STONE FOUNDATION WALL TO REMAIN AND EXTEND.
Status timeline
- Nov 25, 2025 — New job filed (Permit Entire) B01320919-I1
- May 31, 2026 — New job filed (Permit Entire) B01320919-S3
- Jun 1, 2026 — New job filed (Permit Entire) B01320919-S2
- Jun 17, 2026 — Permit issued — work can start (General Construction) B01320919-I1
- Jun 18, 2026 — Permit issued — work can start (Permit Entire) B01320919-I1
- Jul 21, 2026 — New job filed (Approved) B01320919-S4
- Jul 22, 2026 — New job filed (QA Failed) B01320919-S5
- Jul 23, 2026 — Plans approved (Approved) B01320919-S4
- Aug 9, 2026 — Permit issued — work can start (Foundation) B01320919-S3
- Aug 10, 2026 — Permit issued — work can start (Permit Entire) B01320919-S3
- Aug 12, 2026 — Permit issued — work can start (Structural) B01320919-S2
- Aug 13, 2026 — Permit issued — work can start (Permit Entire) B01320919-S2
Work permits
| Permit | Work | Status | Issued | Expires |
|---|---|---|---|---|
| B01320919-S2-ST | Structural | Permit Issued | Aug 12, 2026 | Dec 30, 2026 |
| B01320919-S3-FO | Foundation | Permit Issued | Aug 9, 2026 | Dec 30, 2026 |
| B01320919-I1-GC | General Construction | Permit Issued | Jun 17, 2026 | Dec 30, 2026 |
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