Setbacks & Height Limits in Philadelphia

This guide explains the basic setback, height, and bulk rules that apply to residential construction in Philadelphia under Title 14 of The Philadelphia Code (the city's 2012 zoning code). Numbers depend on your exact zoning district, overlay zones, and lot geometry, so always confirm with the Philadelphia City Planning Commission and the Department of Licenses and Inspections (L&I) before finalizing plans.

What Are Setbacks?

A setback (also called a yard in Title 14) is the minimum required distance between a building and a lot line. Setbacks are measured from the property line to the nearest point of the building wall. In Philadelphia, the dimensional standards for each district appear in the tables at the end of each district chapter of Title 14.

Philadelphia distinguishes between front yards, side yards (interior and street side on corner lots), and rear yards. Because of the city's rowhouse heritage, many residential districts have no front or side yard requirement at all.

Rowhouse Zoning (RSA-5)

The defining residential district in Philadelphia is RSA-5 — Residential Single-Family Attached. This is the zone applied to most of the city's iconic rowhouse blocks in neighborhoods like South Philadelphia, Fishtown, Point Breeze, and Brewerytown.

Why no side yards? Rowhouses share party walls along the interior side property lines. Title 14 was deliberately drafted to legalize this historic pattern rather than force suburban-style setbacks onto narrow rowhouse lots. Where a side yard is voluntarily provided (end-of-row units, corner lots, irregular blocks), Title 14 sets a minimum width to prevent narrow useless gaps.

The rear yard exists to guarantee light, air, and rear access for utilities and emergency egress — it is essentially non-negotiable, even on small infill lots.

Other Residential Districts

Beyond RSA-5, common residential districts and their basic dimensions are:

Numbers above are typical baselines from Title 14 — your specific lot may carry overlays or different base dimensions, especially in transitional or historic areas. Always confirm with the dimensional table in the relevant chapter of Title 14.

Height Limits

In RSA-5 and most lower-density residential districts, maximum building height is 38 feet, measured from the average ground elevation along the building footprint to the highest point of the roof. RM-1 allows 45 ft and RM-2 allows 50 ft.

Height rules become more restrictive (or more permissive) in:

• Center City commercial districts (CMX-4, CMX-5) — allow high-rise buildings, often with no fixed height cap, regulated instead by FAR
• Historic districts — the Philadelphia Historical Commission can impose contextual height limits on top of the base zoning
• /NCO and /NCA neighborhood conservation overlays — may cap height at the prevailing rooflines of the block
• Pilot houses, mechanical penthouses, and roof decks — Title 14 lets certain rooftop features exceed the base height by a limited amount, subject to setback from the parapet

If you are planning a roof deck or pilot house in a rowhouse neighborhood, read the rooftop feature provisions of Title 14 carefully — these are tightly regulated after several years of community pushback.

Lot Coverage and FAR

• Building coverage — RSA-5 allows up to about 75% of the lot, with the rear yard satisfying the open area requirement. RSD-3 caps coverage closer to 30%.
• Floor Area Ratio (FAR) — Philadelphia uses FAR primarily in higher-density and commercial districts (RM, RMX, CMX). Most low- and medium-density residential districts rely on lot area, coverage, and height instead of an explicit FAR.

Common Exceptions and Encroachments

Title 14 allows certain features to project into required yards:

• Eaves, gutters, and cornices — limited projection
• Bay windows and oriels — limited projection
• Stoops, steps, and uncovered porches — generally allowed in front yard areas, including in the public right-of-way subject to a separate Streets Department permit
• Mechanical equipment (HVAC condensers) — must meet noise rules
• Fences and retaining walls — separate height limits in the accessory structures chapter

State and Local Context

Pennsylvania does not preempt local setback and height rules for ADUs or any other residential use, so Philadelphia's Title 14 governs. The Pennsylvania Uniform Construction Code (UCC, 2018 IBC) governs the building (life-safety) side of the project, while Title 14 governs the zoning (land use) side. Both must be satisfied to obtain a building permit from L&I.

For ADU-specific dimensions (which differ from main-building rules), see the ADU rules page.

How to Look Up Your Specific Requirements

1. Find your zoning district — use Philadelphia Atlas and search by address; the property card lists the base zoning and any overlays
2. Read the district chapter — open Title 14 on amlegal and navigate to the chapter for your district (for example, 14-701 for residential)
3. Check overlays — historic districts, /NCO, /NCA, /CDO, and other overlays modify base dimensions
4. Confirm with L&I — the Department of Licenses and Inspections operates a Permit and License Center where you can pre-verify zoning before filing

Variances

If your project cannot meet Title 14, you may apply to the Zoning Board of Adjustment (ZBA) for a variance. ZBA hearings include notice to neighbors and the Registered Community Organization (RCO) for your area, and the burden of proof on the applicant is real. See the Variance Application Guide for the general process.

Official Sources

See the sources linked in the frontmatter for Title 14 of The Philadelphia Code, the City Planning Commission, and Philadelphia Atlas. This guide is informational and is not a substitute for direct confirmation with planning and L&I staff.