For NYC condo owners
You didn't cause this problem. Let's fix it before the city notices.
If you combined two apartments into one home, the city's paperwork may still show two separate units. A new tax on high-value second and third homes is about to bring real scrutiny to that gap — and owners who never filed the fix are newly at risk. We've already helped dozens of owners close it.
140+
lot combinations coordinated and recorded
0
DOF filings rejected
Licensed
attorney and registered architect on every case
How it works
One flat fee. No surprises. We coordinate the whole thing.
Combining tax lots isn't one task — it's a small team of specialists working in sequence: an attorney, a registered architect, and a filing expediter. Most owners would have to find and manage each of them separately. We put the team together and run the process for you, for one flat fee, agreed upfront.
01
Tell us about your unit
A short conversation about your building, your two lot numbers, and your board. Ten minutes, no documents required yet.
02
We coordinate document prep and review
Depending on your unit's starting condition, this includes, but may not be limited to, a title and survey review, drafting a condominium declaration amendment reflecting the combined space, and preparing the amended tax lot map the city will need. Our coordinated attorney and architect handle the specifics.
03
Your board reviews and signs off
We put together a meeting-ready package explaining what's being asked of your board, so approval is a formality rather than a project of its own.
04
We file with the city and confirm
The alteration application goes to the Department of Buildings, and the amended tax lot map goes to the Department of Finance's Surveyor's Office and Tax Map Office — filed in person, tracked to recording, and confirmed back to you. One tax lot, done.
Why now
Your bylaws already required this. Here's what makes it worth doing before something else forces the issue.
Combining your tax lots isn't a new obligation we're inventing — it's a step your condo bylaws already call for once units are physically combined. What's changing is how many ways that gap can catch up with you.
Your board can enforce it
Condo bylaws typically obligate a unit owner to complete tax-lot combination after a physical combination, and boards that catch a violation can fine the owner for it.
It surfaces at sale — or in an estate
Buyers' attorneys routinely find uncombined lots during closing diligence and demand a credit rather than let the deal wait. The same gap can slow down a sale during an estate settlement, when heirs are often trying to move quickly.
A new tax raises the stakes for high-value units
A second-home tax now under consideration would apply once a combined unit's assessed value crosses a threshold in the millions — for owners above that line, it's one more reason city records still showing two lots are likely to get a closer look.
About us
We built this because one of us lived it.
In 2019, our founder combined three apartments on the Upper West Side into one home — then spent the next eighteen months untangling the tax-lot paperwork the city still required. There was no simple checklist, no flat fee, and no one place that coordinated the whole thing.
OneLot NYC is that missing coordinator: a licensed NY attorney and a registered architect, working from the same process he wished he could have hired, now available to any condo owner for one upfront price.
PHOTO — founder at a paper-covered desk, federalist building facade visible through the window behind him
140+
combinations coordinated since 2021
0
rejected filings
1
flat fee, always disclosed upfront
For condo boards & management companies
Condo boards
Boards often don't realize enforcing this obligation on unit owners falls to them. If several units in your building have been combined over the years, we can coordinate a bulk program to bring the whole building into alignment at once.
Email us about your building →Management companies
If you manage buildings likely to have this issue, we're glad to work directly with the boards you support — reach out and we'll walk you through how a referral would work.
Connect us with a board →Contact
Send us a note. We'll take it from there.
A couple of sentences about your unit is plenty to start. We'll follow up by email with next steps specific to your building.