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Cross-Zoning Comparison

Side-by-side zoning analysis across cities

District 1
R6B - New York City
Primarily Residential
District 2
RM-2 - San Francisco
Primarily Residential
District 3
MF-3 - Austin
Primarily Residential

Dimensional Comparison

Metric R6B (NYC) RM-2 (SF) MF-3 (AUS)
Max FAR 2.0 1.8 0.75
Max Height 55 ft 50 ft 40 ft
Lot Coverage 65% 55% 60%
Effective Max Units - 6 (SB9+ADU) -

Housing Permissions

Housing Type R6B (NYC) RM-2 (SF) MF-3 (AUS)
Single-Family
By right
By right
By right
Duplex
By right
By right
By right
Apartments (20+)
By right
Conditional
By right
ADU
By right
State law (SB9)
By right

State Law Overrides

RM-2 (San Francisco)
Up to 6 units possible under state law
SB9 - Duplex + lot split (+3 units)
ADU Law - ADU + JADU by right (+2 units)
AB2097 - No parking near transit
R6B (NYC) & MF-3 (AUS)
No state-level zoning preemptions apply. Development potential determined by local zoning code only.

Analysis

R6B (NYC) offers the highest base density (FAR 2.0) and allows apartments by right. RM-2 (SF) has slightly lower base density (FAR 1.8) and requires conditional approval for large apartments, but California state law (SB9 + ADU) effectively allows up to 6 units on any residential lot regardless of local zoning. MF-3 (AUS) has the lowest density (FAR 0.75) but still permits apartments by right. For a multi-family development, NYC offers the most straightforward path; for maximum unit count on a single lot, SF's state law overrides create the most opportunity despite local restrictions.

Cross-City Equivalents

R6B (NYC) is comparable to: R4-1 (LA), RM-3 (SF), MF-4 (AUS), RMX-2 (PHI)
RM-2 (SF) is comparable to: R6B (NYC), R3-1 (LA), MF-3 (AUS)
MF-3 (AUS) is comparable to: R7A (NYC), R4-1 (LA), RM-3 (SF)

Disclaimer: This report is generated by ZoneLens using publicly available data and standardized zoning analysis. Housing permissions are inferred from zoning code classification and may not reflect all local amendments. State law overrides are based on enacted legislation and may have additional conditions. Verify all information with qualified professionals.

Generated: March 30, 2026 - ZoneLens v1.0.0 Report ID: RPT-XZON-2026-00001
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