Zoning, Variances & Nonconforming Use
~12 min read · Use public controls: zoning classes, variances, conditional uses and grandfathered uses.
Zoning is the public rulebook for what land may become — and the exam lives in its exceptions: the variance for hardship, the conditional use for compatible outliers, and the nonconforming use grandfathered in from an older code.
Zoning basics
Local governments zone under the police power (through enabling acts), dividing territory into districts — residential, commercial, industrial, agricultural, and mixed/overlay zones — with bulk rules (setbacks, height, lot coverage, density) and use rules per district. Buffer zones (parks, transitional uses) soften district borders. Zoning must serve the comprehensive/master plan and cannot be arbitrary or confiscatory; spot zoning — singling out a parcel for benefit or burden inconsistent with the plan — is the invalid classic.
- Police power via enabling legislation — no compensation owed
- Use districts + bulk standards implement the master plan
- Spot zoning = invalid parcel favoritism
The relief valves
A variance excuses compliance where strict application creates unnecessary hardship unique to the parcel (odd lot shape needing a setback break) — granted by the zoning board, not self-created hardship, and area variances are far easier than use variances. A conditional/special use permit allows a listed compatible use (church, school, daycare in residential) upon meeting conditions — no hardship needed; the ordinance itself contemplates the use. Rezoning/amendment changes the map itself.
- Variance: parcel-specific hardship relief
- Conditional use: ordinance-listed exception with conditions
- Hardship you created doesn't count
Nonconforming use
A use lawful when established but outlawed by a later ordinance may continue as a legal nonconforming ('grandfathered') use. Standard limits: no expansion or enlargement, no resumption after abandonment (discontinuance with intent, or beyond the ordinance's time limit), no rebuilding after major destruction (percentage thresholds), and many ordinances add amortization periods phasing the use out. Sale generally does NOT end the protection — the status runs with the use, not the owner.
Worked example
A corner lot hosts a small grocery operating since 1975; the area was rezoned residential in 1990. The owner wants to (a) sell to a buyer who'll keep the store, (b) double the sales floor into the storeroom, and (c) after a fire destroys 80% of the building, rebuild. Meanwhile a neighbor with a triangular lot seeks permission to build 4 feet into the side setback. Sort every request.
(a) Sale: the grandfathered status attaches to the USE — the buyer may continue the store; nonconformity survives transfer. (b) Expansion: doubling the floor ENLARGES the nonconforming use — prohibited; the protection freezes the use at its lawful scope. (c) Rebuild after 80% destruction: above typical destruction thresholds, the right to rebuild is lost — the site reverts to residential compliance. The neighbor: a triangular lot creating unique, not-self-created hardship in meeting a setback is the textbook area variance — zoning board relief, no rezoning required. Four requests, four different doctrines, one ordinance.
Common exam pitfalls
Confusing a variance with a conditional use permit.
Variance = hardship relief from the rule; conditional use = the ordinance's own listed exception, no hardship needed.
Assuming sale kills a grandfathered use.
Nonconforming status runs with the use through transfers — expansion, abandonment, and destruction are what end it.
Expecting compensation for zoning's value effects.
Police-power regulation is uncompensated — only a taking (eminent domain or regulation destroying all use) pays.
Variance pities the parcel, conditional use follows the list, grandfather freezes the clock — until you enlarge, abandon, or burn.
Recap
- Zoning = police power executing the master plan, uncompensated
- Bulk + use rules per district; spot zoning invalid
- Variance: unique, non-self-created hardship
- Conditional use permit: listed compatible use with conditions
- Nonconforming use: no expansion, no post-abandonment resumption, destruction thresholds
- Grandfathered status survives sale
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