Air Rights and Development Rights, 7 Attorney Title Checks

A client is buying a two-storey building on a block zoned for twelve. The pro forma assumes they can build up. The unused capacity above that roof may already have been sold to the tower next door, in an instrument recorded in 2007 that the purchase agreement does not mention. Development rights are property, they are severable, and once transferred they do not come back.

This is one of the few areas where a title search reaches something genuinely invisible on the ground, and the vocabulary varies by jurisdiction — transferable development rights, air rights, floor area ratio transfers, zoning lot mergers. The mechanics rhyme with purchase options and rights of first refusal in that a recorded instrument constrains what a later owner can do.

What actually gets recorded

Three instrument types carry most of it.

• A transfer or grant of development rights, conveying unused floor area from one lot to another, usually with a metes and bounds or lot-and-block description of both.
• A zoning lot merger or declaration, treating several tax lots as one zoning lot so capacity can be shifted within it. These frequently include a waiver of the right to object and bind successors.
• An easement, most often for light and air or for non-obstruction, protecting the receiving site’s outlook or its ability to build.

All three run with the land. None of them are visible from the sidewalk, and none of them show up in a search scoped only to the current owner.

Seven checks before the file closes

1. Search the receiving site and the granting site

The instrument affects two parcels and may be indexed cleanly against only one of them. If your client is buying the granting lot, the transfer is the whole story. If they are buying the receiving lot, confirm the rights it relies on were actually conveyed and are still there.

2. Run the term long enough to reach the transfer

These instruments cluster around development cycles, so the operative document may be twenty years old and every deed since has been silent about it. A current owner search will not find it. This is a chain search or it is nothing.

3. Read the description of what was transferred

Square footage, floor area, or a percentage of a defined maximum. Whether the transfer was of everything available or a stated portion. Whether future increases from an upzoning were included, which is the clause that generates the most litigation.

4. Check for a zoning lot merger and who signed it

A merger typically requires every party in interest on each lot to join, including mortgagees. A merger executed without a lender’s joinder is a defect worth finding now. The consent analysis is similar to the one in condominium and common interest research.

5. Look for light and air or non-obstruction easements

These burden the parcel without transferring anything, and they can cap what may be built as effectively as a sold-off development right. They are recorded and they are easy to read past in a long index run.

6. Reconcile the record against the municipal file

Whether a transfer was approved, what capacity the municipality currently credits to the lot, and whether a certification was issued are municipal planning records. They are not in the recorder’s office and they must be requested separately. Both halves are needed, and they do sometimes disagree.

7. Confirm nothing has been transferred twice

Where a lot has been through multiple owners and multiple development cycles, more than one instrument may purport to convey the same capacity. Laying every transfer out in filing order is the only way that surfaces.

Where the record stops

The land records will not tell you how much unused capacity a lot has today. That is a zoning calculation performed against the current code, the lot area, and whatever has already been transferred or built, and it belongs to a zoning attorney or a planning consultant. The record supplies one input to it.

Nor will a search tell you whether a transfer was validly made. Whether the right existed, whether the parties had authority, and whether a municipality’s approval was properly obtained are legal conclusions, the same division described in commercial property acquisition due diligence.

What the search settles, and what it does not

• A search reports what has been recorded in the county searched, as of the search date, with copies of the instruments found.
• It does not calculate remaining development capacity or interpret the zoning code.
• It does not produce municipal planning approvals, certifications, or correspondence.
• It does not decide whether a transfer or merger was valid or whether a required party failed to join. Each is a legal conclusion.
• Recording and indexing practice varies by county, and an empty result reflects the record rather than proving no transfer occurred.

How AFX Research supports the file

AFX Research performs in-person searches, certified abstracts, and full document copies from any U.S. county — delivered in 12–72 hours and backed by our search guarantee. On a development rights matter the useful deliverable is a long-term chain on both the granting and the receiving parcels, with every transfer, merger, declaration, and easement found of record, in date order and attached, so the capacity history can be read rather than reconstructed from a summary. We support property attorneys through acquisition and development diligence, and if you send us the parcel and the party names we can work to a closing deadline.

Order a title search with the recorded instruments your file needs, or compare our search products to match the scope to the matter.