Ch6. Zoning and Land Use Deep Dive — US Real Estate License Exam

Zoning and Land Use Controls: Federal Framework

Constitutional Basis for Land Use Regulation:
Police Power: State power to regulate for health, safety, welfare, and morals
  → Zoning ordinances, building codes, subdivision regulations
  → No compensation to owner (regulation is not a "taking")

Eminent Domain: Government may take private property for public use
  → Requires "just compensation" (5th Amendment, applied to states via 14th)
  → Condemnation proceedings in court

Inverse Condemnation:
  If a regulation goes "too far" and destroys substantially all economic value
  → May constitute a regulatory taking requiring compensation
  → Penn Central test / Lucas test (US Supreme Court framework)

Zoning Districts:
┌──────────────────┬─────────────────────────────────────────┐
│ Residential      │ Single-family, multi-family, mixed-use  │
│ Commercial       │ Neighborhood, general, central business │
│ Industrial       │ Light, heavy, business park             │
│ Agricultural     │ Farming, open space, conservation       │
│ Special Purpose  │ Historic, flood plain, transit overlay  │
└──────────────────┴─────────────────────────────────────────┘

Residential Sub-Classifications:
Single-family exclusive: R-1 (one house per lot)
Low-density: R-2 (single family + small multifamily)
Multi-family: R-3, R-4 (apartments, townhomes)
Mixed residential-commercial: MU (mixed use)

Commercial Sub-Classifications:
C-1: Neighborhood commercial (small shops, convenience uses)
C-2: General commercial (retail, restaurants, services)
C-3 / CBD: Central business district (highest density commercial)
Office Park / Professional: low-intensity office uses

Development Standards: FAR, Setbacks, and Coverage

Floor Area Ratio (FAR):
FAR = Total Gross Floor Area ÷ Lot Area

Interpretation:
FAR 1.0: Total building area equals lot area
  → Could be: one-story building covering 100% of lot
  → OR: two-story building covering 50% of lot
FAR 2.0: Total building area is twice the lot area
FAR 5.0+: High-rise density (common in CBD zones)

Typical residential FAR: 0.3–0.8
Typical commercial FAR: 1.0–10.0+ (urban cores)

Coverage Ratio:
  Building footprint only ÷ lot area
  Measures ground-level building density
  Distinct from FAR (which counts all floors)

Setback Requirements:
  Front setback: distance from street-side property line to building face
  Rear setback: distance from rear property line to building
  Side setback: distance from side property line to building

All three setbacks create the "buildable area" of a lot.

Development Approvals Process

Building Permit:
  Required for: new construction, additions, major renovations
  Issued by: local building department (city/county)
  
  Typical permit requirements:
  - Site plan showing lot coverage, setbacks, FAR
  - Architectural drawings (stamped by licensed architect/engineer)
  - Compliance with zoning, building code, fire code
  
  Permit timeline: 2 weeks to several months depending on jurisdiction and project size

Certificate of Occupancy (CO):
  Issued after final inspection
  Confirms: building is complete and safe to occupy
  Required before: any occupant may legally move in / operate
  
  Temporary Certificate of Occupancy (TCO):
  For partially complete buildings where some areas are ready for use
  
Use Change / Conversion:
  Changing from one use type to a different use type
  
  Upgrade in use category:
    From less intense → more intense use = permit/approval required
    Example: converting warehouse to residential lofts (adaptive reuse)
    
  Downgrade in use category:
    From more intense → less intense = building department approval
    Example: converting retail space to storage

Subdivision Approval:
  Dividing one parcel into two or more lots requires:
  - Plat map preparation (licensed surveyor)
  - Planning commission or board approval
  - Dedication of streets, utilities, public spaces
  - Filing of recorded plat at county recorder

Special Zoning Provisions

Planned Unit Development (PUD):
  Mixed-use development approved as a unified project
  Allows flexibility in design not possible under standard zoning
  Common in large residential communities with integrated commercial

Overlay Zone:
  Additional set of requirements applied on top of base zoning
  Examples: historic preservation overlay, flood hazard overlay, transit corridor overlay
  Owner must satisfy BOTH the base zone requirements AND the overlay requirements

Agricultural Protection:
  Many counties protect farmland through:
  - Agricultural zoning (limits non-farm development)
  - Agricultural conservation easements
  - Right-to-farm laws (protect farms from nuisance suits by new residential neighbors)
  
Urban Growth Boundary (UGB):
  Designated line separating urban areas (zoned for development) from rural areas
  Used in states like Oregon, Washington to contain sprawl
  Property inside UGB: urban uses permitted
  Property outside UGB: agricultural and rural uses only

Key Concept Cards

Zoning: 4 Primary Land Use Categories ★★★★★ : Residential · Commercial · Industrial · Agricultural (+ special purpose) Exam tip: Know typical uses permitted in each category

FAR vs. Coverage Ratio ★★★★★ : FAR = all floors ÷ lot area (volumetric density). Coverage = footprint only ÷ lot area (horizontal density). Exam tip: FAR of 2.0 with 25% coverage = 8-story building on 25% of lot

Building Permit → CO sequence ★★★★☆ : Permit required before construction begins; Certificate of Occupancy required before legal occupancy. Exam tip: Cannot legally occupy without a CO even if building is complete

Practice Questions

Q. Why can a nonconforming use continue to operate after a new zoning ordinance would otherwise prohibit it?

Vested rights / grandfathered status. The use was legal when established. The Constitution’s Due Process Clause protects existing legal uses from abrupt elimination. However, nonconforming uses cannot be expanded, and if they cease for a statutory period (often 1–2 years), the nonconforming status is lost and the use cannot resume.

Q. What is the purpose of setback requirements in residential zoning?

Setbacks serve multiple functions: ensuring light and air access to adjacent properties, providing fire separation, preserving privacy between neighbors, and creating aesthetic open space along streets. They also define minimum lot sizes functionally by limiting buildable area.