The Baker House Newsletter Issue X
Use It or Lose It
Some properties carry rights the zoning code would never grant today. They transfer with the deed, they pay like an asset, and they can die quietly through vacancy, fire, or a careless renovation.
THE LEAD
The Legal Nonconforming Use
This week’s subject is a legal category most people know by its nickname: the grandfathered property. The formal term is a legal nonconforming use, a use of land that was lawful when it began and was later outlawed by a zoning change. The corner store surrounded by houses, the two-family on a street zoned for single-family, the auto shop in a neighborhood that rezoned residential decades ago. The code would refuse all of them today. Because each one existed before the code changed, each is allowed to continue.
That permission is worth money for the plainest reason in this series: the supply of these properties was fixed on the day the ordinance passed, and it shrinks from there. A legal two-family in a single-family zone collects a second rent the current code refuses the rest of the street. The protection attaches to the property, so it transfers with the deed to the next owner.
The readers of the licenses issue will recognize the shape. A grandfathered use is scarcity created by law, attached to ordinary-looking property, and priced correctly only by buyers who check. The difference, and the subject of this issue, is how the right dies. A liquor license can be sold, moved, and revived. A nonconforming use generally can do none of those things. It stays tied to its address, is generally held to its established size, and survives only as long as the use continues under the local rules.
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CHART
How long a nonconforming use can sit discontinued before the right is lost, in named examples. Fort Worth applies one calendar month to nonconforming uses of land and 12 to 24 months to buildings, which is the point: the clock is local. Some states also require proof the owner intended to abandon. Sources: Fort Worth Code sec. 7.102; New York City Zoning Resolution; state case law summaries.
THE TURN
Zoning law lets these uses continue, and some continue indefinitely. What ordinances generally restrict is growth, and what they carefully define is how the right can be lost. The use may continue, but most codes bar expanding it, intensifying it, or switching it to a different prohibited use. If it sits dark past the ordinance’s discontinuance period, commonly a year, two years in New York City, and in Fort Worth a single calendar month for nonconforming uses of bare land, the right can expire, and in many jurisdictions the owner’s intent to resume does not save it. If fire or storm destroys the building past a threshold, often near half its value, many codes bar rebuilding the nonconforming part.
So the premium these properties deserve comes with a discount the market rarely prices well. The income is real and the scarcity is real, and the right behind both is fragile in ways a deed search does not reveal. A buyer who understands exactly how the right dies can pay the premium with confidence. A buyer who does not can pay a two-family price for a building the city now considers a single-family house.
The right transfers with the deed, and it can die of vacancy.
THE FRAME
One Property, Two Ways to See It
| WHAT THE MARKET SEES | WHAT A DISCIPLINED BUYER SEES |
|---|---|
| An old two-family on a single-family street | A second rent the current code would deny next door |
| A dated corner store among houses | The only commercial income the current code allows on the block |
| A cheap vacant building with history | A right that may already be dead on the clock |
WHAT TO LOOK FOR
Get the status in writing. Ask the municipality for a zoning verification letter or certificate of nonconformity stating the use is legally nonconforming. A seller’s word, a listing’s word, and decades of quiet operation prove nothing to a zoning officer. The letter belongs in diligence next to the title search.
Read how the right dies, locally. Pull the ordinance’s nonconforming use section and find three numbers: the discontinuance period, the destruction threshold, and any amortization schedule. These vary town by town, and the local version is the only one that matters.
Prove the use never lapsed. The burden of proving continuity often falls on the owner. Collect leases, rent rolls, utility records, and tax filings reaching back years. A fourteen-month vacancy a decade ago can surface at the worst possible moment.
Insure the right, and touch the building carefully. Standard property insurance rebuilds walls, and a coverage usually called ordinance or law coverage addresses what the zoning code does after a loss; ask the broker about both. And before any renovation, ask the zoning office what the permit triggers, because in some jurisdictions substantial improvements can require bringing the property into conformity. The rules are local and fact specific, so ask before pulling anything.
HOW THE MATH WORKS
Two houses sit on the same single-family street, using round numbers. One is an ordinary house worth 400,000 dollars that would rent for 2,400 a month. The other is a legal nonconforming two-family collecting 1,800 from each unit, 3,600 a month, income the street is barred from duplicating. The second unit adds 1,200 dollars a month over the single-family rent, 14,400 a year, call it 10,000 after its share of expenses. A buyer who requires a 10 percent return on that extra income can justify paying up to about 100,000 over the single-family comparable, and a buyer requiring more can justify less. That number is arithmetic built on stated assumptions, and whether the premium it supports is cheap or expensive turns entirely on the diligence above. With a verification letter, documented continuity, proper insurance, and a plan that never lets the units sit dark past the local clock, the premium buys durable extra income. Without those things, the same premium buys a claim the city may already consider expired, and the first bad fire or long vacancy converts the building to what the street says it is. The discipline, as in the licenses issue, runs in both directions: know what the right is worth before paying for it, and know it is alive before paying anything at all.
THE RISKS, TOLD STRAIGHT
The right dies three ordinary ways. Vacancy past the discontinuance period, and in strict jurisdictions the clock runs through probate, repositioning, and a slow leasing market. Casualty past the destruction threshold, where many codes bar rebuilding the nonconforming part even when insurance pays for the walls. And improvement, where in some jurisdictions the permits pulled for a substantial renovation can require bringing the property into conformity, depending on local rules and the scope of the work. Beyond those three, some states allow amortization, a scheduled phase-out of nonconforming uses on a fixed timeline. The premium can also erode from the opposite direction: when a state legalizes accessory units or two-family conversions by right, as several now have, the exclusivity of a grandfathered second unit shrinks with every new legal unit nearby. Lenders and insurers know all of this, so financing can be slower and coverage more complicated than for a conforming property. None of this argues against the category. It argues that the entire premium rests on a legal status that must be verified, documented, insured, and operated with care, and a grandfathered property bought without that work is a standard property bought at a markup.
THE WIRE
The Right, at Industrial Scale
A public company built on grandfathered rights. Lamar Advertising, a real estate investment trust, operates more than 360,000 outdoor displays and earned 2.27 billion dollars of revenue in 2025. The federal Highway Beautification Act and decades of state and local sign bans limit new billboard construction, so many existing boards stand as legal nonconforming structures. The boards sell advertising, and much of their value rests on the right to stand where a new sign would be refused.
The same vacancy, two different outcomes. In New York City, a nonconforming use discontinued for two continuous years is lost, and intending to resume it does not preserve it. Connecticut courts require proof the owner actually intended to abandon the use. The identical dark storefront keeps its rights in one state and loses them in the other, which is why the local ordinance and the state’s case law are the diligence, and a generalization from another market is no substitute for them.
A market that thins on its own. Every year, some share of these properties loses its status through fire, vacancy, redevelopment, and amortization, and no new properties can join the group a past zoning change created. For each ordinance, the stock of uses it grandfathered was largest on the day it passed and has shrunk ever since. For a careful buyer, that is a market where the competing supply declines without anyone building a thing.
OFFICE HOURS
How to verify a grandfathered status before closing, what a zoning letter does and does not protect, and when the premium on a nonconforming property is worth paying: Richard takes questions on all of it every Wednesday at 2pm ET in his free office hours. He answers whatever attendees ask, live, for an hour. If this issue raised a question for you, bring it.
SOURCES
- New York City Zoning Resolution, discontinuance provisions for nonconforming uses: two continuous years, with intent to resume not preserving the use.
- Fort Worth, Texas, Code sec. 7.102: one calendar month discontinuance for nonconforming uses of land; 12 to 24 months for buildings. Municipal zoning codes and planning references on nonconforming uses: 12-month discontinuance periods common; destruction thresholds commonly near 50 percent of value, as in Quincy, Washington, Municipal Code ch. 20.60; expansion restrictions; amortization in some states.
- Connecticut nonconforming use case law summaries: loss of status requires proof of intent to abandon.
- Lamar Advertising Company, full-year 2025 results: $2.27 billion revenue; more than 360,000 displays. Federal Highway Beautification Act of 1965 and state and local sign regulations on new billboard construction.