Trenton, NJ Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- RL-1 max building coverage
- 40% of lot area
- RL-2/RL-3 max building coverage
- 35% of lot area
- RL district max impervious coverage
- 45%, all three RL zones
- RM-1/RM-2 max impervious coverage
- 70% flat, all uses
- RH-2 max impervious coverage
- up to 75% for RH/MF/NR uses
- Enforcement
- Zoning Officer, Trenton Code § 315-17
Summary
Trenton's Land Use Ordinance caps how much of a residential lot can be covered by buildings and pavement. Table 4-1 sets maximum building coverage at 40% in the RL-1 district, 35% in RL-2 and RL-3, rising to 50-65% in the RM and RH districts, with impervious surface caps from 45% up to 75% depending on zone and use type.
Table 4-1: Residential Districts Dimensional Standards RL-1 RL-2 RL-3 ... Maximum Building Coverage 40% 35% 35% Maximum Impervious Surface Coverage 45% 45% 45% ... RM-1 RM-2 ... Maximum Building Coverage SF, SF-A, 2F: 50% RH, NR: 60% SF, SF-A, 2F: 50% RH, NR: 60% Maximum Impervious Surface Coverage 70% 70% ... RH-1 RH-2 ... Maximum Building Coverage SF, SF-A, 2F: 50% RH, MF, NR: 65% SF, SF-A, 2F: 50% RH, MF, NR: 65% Maximum Impervious Surface Coverage SF, SF-A, 2F: 60% RH, MF, NR: 70% SF, SF-A, 2F: 65% RH, MF, NR: 75%
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4853025; v21 updated 2025-12-16; through 12-16-2025).
Full Breakdown
3. In the low-density single-family districts, maximum building coverage is 40% of lot area in RL-1 and 35% in both RL-2 and RL-3; maximum impervious surface coverage is 45% in all three districts. In the medium-density RM-1 and RM-2 districts, building coverage rises to 50% for single-family, single-family-attached, and two-family dwellings and 60% for rowhouse and nonresidential uses, with impervious surface capped at a flat 70% regardless of use. The high-density RH-1 and RH-2 districts allow the most coverage: 50% building coverage for single-family, single-family-attached, and two-family dwellings, and 65% for rowhouse, multi-family, and nonresidential uses.
Impervious surface coverage in RH-1 is capped at 60% for single-family/two-family uses and 70% for rowhouse/multi-family/nonresidential uses; in RH-2 those caps rise to 65% and 75% respectively. G defines impervious surface coverage as the percentage of the lot occupied by structures, pavement, and other surfaces that block water absorption, and expressly allows permeable pavement to be counted at a reduced percentage based on the material and installation method reviewed at site plan. Gravel does not qualify as permeable pavement. A; a different standard displaces them only where the Ordinance lists one for a specific use elsewhere in the code.
Violations & Fines
Exceeding the coverage limits is a zoning violation enforced by the Zoning Officer under Article 17. Upon finding a violation, the Officer sends written notice by certified mail, and the owner has 15 days to respond with a remedy. A property found in violation has its certificate of occupancy automatically voided under § 315-17.5, and a nonresponse within 15 days triggers an automatic summons in Municipal Court under § 315-17.6.
Frequently Asked Questions
What is the maximum lot coverage allowed on a single-family lot in Trenton?
Does impervious surface coverage include my driveway and patio?
What happens if my lot exceeds the coverage limit?
Sources & Official References
Other rules in Trenton
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