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Building Setbacks & Zoning

Allentown's Building Setbacks & Zoning: The Rules That Matter

By CityRuleLookup Editorial Team

Every city handles building setbacks & zoning a little differently. In Allentown, Pennsylvania, there are 3 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Lot Coverage Limits

Allentown's zoning code caps building coverage for the City's standard detached house type at 50% in the N3 and N4 residential zones and 60% in the GX-N, NX, N2 and GX-C zones. Coverage is measured as the ground-floor footprint of all buildings on the lot divided by total lot area under Zoning Ordinance § 660-131I, enforced through the zoning permit process.

Key details: N3/N4 zones: 50% max. building coverage. GX-N, NX, N2, GX-C zones: 60% max. building coverage. Building type: House A (standard detached dwelling). Measured by: § 660-131I, footprint / lot area. Enforcing agency: Zoning Officer, Bureau of Building Standards.

Building beyond the coverage cap without an approved zoning permit violates Chapter 660. Under § 660-123.D, the City pursues a civil enforcement action, and a person, partnership or corporation found liable pays a judgment of up to $500 per violation plus court costs and the City's attorney fees; each day the excess coverage remains is a separate offense. The Zoning Officer may also withhold a certificate of occupancy until the applicant secures a variance from the Zoning Hearing Board.

Structure Height Limits

Allentown limits the City's standard detached house type, House A, to 2.5 stories (three with a visible basement and a half-story roof) in the GX-C, GX-N, NX and N2 zones, and two to 2.5 stories in N3 and N4, under Zoning Ordinance § 660-29.G. Story height is capped at 11-12 feet floor-to-floor, and height to the roof eaves may not exceed 20 feet.

Key details: GX-C zone: 2-2.5 stories (3 w/ basement+half story). GX-N, NX, N2: 1.5-2.5 stories max. N3, N4: 2-2.5 stories max. Story height: 9 ft min, 11-12 ft max floor-to-floor. Height to eaves: 20 ft max, § 660-131M.

Building above the applicable story or eave-height maximum without zoning approval violates Chapter 660. The City enforces through a civil action under § 660-123.D, with a judgment of up to $500 per violation plus court costs and the City's attorney fees, and each day the oversized structure stands counts as a separate offense. The Zoning Officer can withhold a certificate of occupancy, and an owner who cannot meet the table may seek a variance from the Zoning Hearing Board under § 660-116.

Setback Rules

Allentown's standard detached house type, House A, must sit back 30 feet from the front lot line in the GX-C zone and 15 feet in the GX-N, NX, N2, N3 and N4 zones, with four to six feet on each side and a uniform 35 feet at the rear, under Zoning Ordinance § 660-29.D. Front-yard averaging can adjust the front figure.

Key details: Front setback, GX-C: 30 ft minimum. Front setback, N zones: 15 ft minimum. Side setback: 4 ft (GX zones) / 6 ft (N3, N4). Rear setback: 35 ft minimum, all zones. Rear landscape yard: 15 ft deep, 150 sq ft min.

Constructing within the required setback without approval violates Chapter 660. The City pursues civil enforcement under § 660-123.D, with a judgment capped at $500 per violation plus court costs and the City's attorney fees, and each day the encroachment continues is a separate offense. The Zoning Officer can withhold a certificate of occupancy, and an owner seeking relief from the table must apply to the Zoning Hearing Board for a variance under § 660-116.

The Bottom Line

Allentown's building setbacks & zoning rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Allentown is broadly strict or permissive.

All of the above reflects Allentown's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.