Here's the thing about a boom: nobody regulates it until it's big enough to be worth the gas. NYC's office-to-residential conversion wave just crossed that line. This summer, with the biggest conversion loan the city has ever seen already closed on Wall Street, the Department of Buildings stopped work on two Manhattan conversions in the space of about a week and then went out and walked 180 jobsites looking for trouble. Nobody's put those four things in one place. So let's.

Start with the money, because the money is why the rest matters. At 111 Wall Street, InterVest Capital Partners and developer MetroLoft are turning a 24-story former bank back office into roughly 1,568 apartments across 899,000-plus rentable square feet, with an overbuild taking it to 30 stories and about a quarter of the units set aside as affordable at 80 percent of area median income. The financing — $778.6 million of construction debt plus an $88.4 million C-PACE extension, $867 million all in, from Apollo, J.P. Morgan, TYKO Capital and Petros — closed December 22, 2025, and was reported by the arranger, Walker & Dunlop, as the largest single-building office-to-residential conversion loan in New York City history, and in the country. Gensler is the architect of record, and the release names Collaborative Construction Management as construction manager. That's 1,568 kitchens, 1,568 bathrooms, and six new floors of structure on one job — the biggest single bet anybody's placed on this product in this city.

“The thing getting people stopped is the gap between what's on site and what's on file.”

Now the part the lenders didn't put in their release. On July 7 a structural column failure at 235 East 42nd Street — the former Pfizer headquarters, another MetroLoft conversion, this one with David Werner Real Estate — prompted an evacuation and street closures, what DOB has since described as a near-collapse. As of DOB's August 4 statement the investigation into the cause was still open; nobody's said what caused it on the record, and we're not going to guess. What we can say is what the agency did next.

Item one: 750 Third Avenue — DOB's own records carry the building as 740 Third. SL Green is spending about $805 million to turn the 34-story tower into apartments — 639 of them in its December 2024 investor deck, 680 in the plans it filed with DOB in May 2025. On Wednesday, July 29, DOB issued a partial stop-work order halting structural steel work from the ninth floor up, for work contrary to the plans. Per the agency, as reported by Commercial Observer, inspectors found steel columns with welded splices and inconsistencies against the filed plans; when they asked for documentation that the department had approved the splices, it wasn't produced on site. SL Green's version, same outlet: during reinforcement prep, before any overbuild work, the team 'identified an on-site condition that differed from the plans that were submitted to the city.' The next day, Thursday, July 30, after a professional engineer's structural-stability report, DOB rescinded the order in full. Here's what the press coverage stopped short of: the same day, July 30, a DOB audit put a partial stop-work order right back on the site, this time for work contrary to the structural plans, per the agency's own complaint record. That second order sat on the books for 16 days. It came off August 14 — on paper. An approved structural detail, sheet S-411.00, and a PE-stamped stability letter. Separately, DOB's violation record shows two OATH summonses written July 28 naming New Line Structures & Development as respondent of record — one for steel columns on the 11th floor not built per approved plans, one for a sidewalk shed not per plans — $1,250 each, hearings set for October 1. Those are charges with a hearing date, not findings, and we'll treat them that way. The lesson isn't 'SL Green did something wrong' — the record doesn't say that. The lesson is that a splice detail without the paper to match it didn't cost a day of steel on an $805 million job. It cost 16, and what ended it was a drawing and a letter.

Item two: 222 Broadway. GFP Real Estate is converting the 1962 Western Electric tower in the Financial District into 788 apartments, with Leeding Builders Group as contractor and DeSimone Consulting Engineers on the structure. On July 24 DOB served a full stop-work order — its third at the site in a matter of weeks, per The Real Deal; the first two — issued about two weeks earlier, per DOB's complaint records — were for work not conforming to approved documents and for failing to provide the professional-engineer drawings Chapter 33 of the Building Code requires. The third was about two cracked concrete beams on the new 32nd floor that were found and repaired in March with through-rods and steel strapping. DOB's statement, carried by Bloomberg: 'It was determined that the contractors and engineers at the site did not notify us of the issue with the beams when they first became aware of it, and the change in plans for the repairs to the beams were not filed with the Department.' GFP says a third-party engineer reviewed the repair and the building's stability was never compromised — and DOB's own statement, as carried by Bloomberg, said the beams posed no immediate threat. By DOB's account, the issue is the reporting, not the concrete.

And here's the piece nobody's printed yet. That order has been coming off in pieces, per DOB's own complaint record for the site. August 4: a partial lift so the material hoist could be inspected and drop-tested. August 11: non-structural work allowed, per an allowed-work list the engineer of record submitted August 6. August 17: lifted further, per the engineer's August 13 letter. As of today the property profile still reads 'Partial Stop Work Order Exists on this Property.' So 222 Broadway is moving again — non-structural work, on a list the engineer wrote and DOB accepted — and whatever isn't on that list is still stopped.

Item three, the zoom-out: the sweep. On August 4 DOB announced the first phase of an inspection blitz, in a statement it distributed to reporters, as carried by Gothamist and Construction Dive — 180 jobsites, all of them picked because they had a connection to the 235 East 42nd Street project team: MetroLoft, Barone Steel Fabricators, Domani Inspection Services and Northeast Specialist Group. That's worth being precise about, because the brief that reached this desk called it a 'citywide sweep of conversion sites,' and it wasn't — only 24 of the 180 were office-to-residential conversions. The tally: 65 OATH violations at 38 sites, 18 partial stop-work orders and one full stop at a Williamsburg apartment building. The 24 conversions drew three violations and one stop-work order between them. DOB said inspectors found no immediately hazardous structural issues posing an imminent danger to public safety, and no evidence that the July 7 failure is 'in any way inherent to office-to-residential conversion projects.' Most of what they wrote up was site-safety housekeeping, work not matching approved plans, and paperwork. The agency also said a second round is coming, targeting other entities tied to the East 42nd Street job. DOB didn't publish the site list, so we can't tell you whether 111 Wall Street — MetroLoft's biggest job — was among the 180. We can tell you DOB named its developer as one of the four firms whose connection to the East 42nd Street job put a site on the list.

So what's the pattern? Not that conversions are unsafe — DOB said it found no evidence the July 7 failure was inherent to them. It's that the thing getting people stopped is the gap between what's on site and what's on file. A welded splice with no approval letter. A beam repair with no amended drawing. PE drawings that weren't there when the inspector asked for them. Three orders, three conversions — and the one that cleared fastest cleared on paper, an approved detail and a stamped letter, and it still took 16 days. With $867 million already closed on one building and 14,000-plus conversion units in the pipeline, expect every structural inspector in Manhattan to walk onto a conversion site asking the same question: show me the paper for that.

Your own site, this week. If you're a GC or a structural sub on a conversion, here's what DOB has been looking at, by the record above — and this is a checklist, not legal advice. One: every field change to structural steel or concrete — splices, reinforcement, repairs — has a PAA or amended drawing filed and approved before the work, and a copy is in the trailer, not in somebody's inbox. Two: any cracking, deflection or damage in existing structure gets reported to the department when it's found, then repaired; by DOB's statement, the 222 Broadway order was about the sequence, not the fix. Three: your engineer of record and special inspector can produce their reports on demand, on site, the day an inspector asks. Four: the plain site-safety stuff — fence permits current, site safety manager present, housekeeping — is what drew most of the 65 violations in the sweep, and it's the cheapest thing on this list to get right. Five: DOB said round two targets other entities tied to the East 42nd Street job — so if your firm touched that project in any capacity, assume an inspector is coming and walk it yourself first.

The board on this desk carries every public bid we can find. The private side carries the deals. The thing connecting them right now is a clipboard — and at 750 Third and 222 Broadway the record says it was the paper, not the structure, that stopped the work.