Deck Permit in Philadelphia, PA
Permit Summary
Do You Need a Deck Permit?
Exemptions
A Building Permit is not required for a deck of any material that is accessory to a one- or two-family occupancy when the deck is not more than 12 inches above the ground surface below and is not over a story or basement. This permit exemption does not apply in a flood protection area. Zoning-permit exemptions are separate and include qualifying low decks within building lines and rear-yard decks accessory to one-family dwellings that are allowable by the Zoning Code.
Attached / Detached Rules
The EZ Deck standard applies to new decks attached to an existing single-family dwelling. A non-exempt freestanding deck or a deck that otherwise departs from the EZ standard cannot use that no-plan path and requires permit applications with plans. The EZ deck may use only existing-width door openings; creating or enlarging a rear-wall door or window opening requires a separate Building Permit.
Egress Rules
For the EZ path, the door to the deck may be installed only in an existing-width opening; a new or enlarged opening requires a separate Building Permit. The Zoning Code permits stairs from ground level to a rear-yard deck except at attached buildings, where ground-to-deck stairs are prohibited. The EZ standard likewise allows stairs to grade only for decks on detached or semi-detached single-family dwellings.
Permit & Review Path
Permit / Review Path
First determine whether the deck qualifies for the 12-in. Building Permit exemption. If a non-exempt new deck attached to an existing single-family dwelling meets every EZ Deck condition, it can use the Residential Construction Permit EZ path without plans. A deck outside the EZ standard, including a roof deck, a deck above the first floor, an oversized deck, a deck with unusual heavy loads, or work being legalized after construction without a permit, must use plan-based review. Apply for any required Zoning Permit before the Building Permit.
Zoning & Placement Rules
Zoning Rules
A Zoning Permit is generally required for construction that changes a structure's exterior dimensions unless an exemption applies. Administrative Code § A-301.2.5 exempts qualifying decks within building lines that are not more than 12 inches above ground and are not over a basement or story, and also exempts rear-yard decks accessory to one-family dwellings that are allowable by the Zoning Code. Under § 14-604(4), the listed non-roof-deck rules apply outside CMX-4 and CMX-5: decks are prohibited in required front and side yards and may be located in the rear yard subject to enclosure, garage-access, and setback conditions.
Setback Rules
For non-roof decks subject to § 14-604(4), a deck may encroach into the required rear yard only if its floor is at or below the first story fully above grade and it stays at least 3 ft. from a rear lot line serving two or more lots or the edge of a common driveway. Vertical support elements must be at least 18 in. from all lot lines. The EZ standard is more specific for its path: the deck must be at least 3 ft. from the rear property line or common driveway, and support columns must be at least 18 in. from all property lines.
Special Area Rules
The Building Permit exemptions in Administrative Code § A-301.2 do not apply in flood protection areas, where permits are required for covered construction and site work; flood-protection documentation or review may therefore apply. Historic properties require Philadelphia Historical Commission approval before the L&I Building Permit application. Zoning-triggered neighborhood conservation, facade, or other site-specific reviews may also require City Planning Commission approval.
Structural Requirements
Structural / Load Rules
The EZ Deck standard prescribes pressure-treated Southern Pine structural framing, compatible corrosion-resistant fasteners and hardware, beam and joist span tables, cantilever limits, bracing, blocking, hangers, and connection details. Decks outside the EZ standard require plans and must comply with the currently adopted Philadelphia construction codes and approved design.
Foundation / Footing Rules
Under the EZ Deck standard, footings must extend 30 in. below grade to the frost line and bear on undisturbed natural soil. Footings must be at least 6 in. thick and at least 16 in. in diameter at end posts or 19 in. at intermediate posts. Posts must be at least nominal 6x6 and must be restrained against lateral displacement with approved connectors or the prescribed embedment/bracing method.
Ledger / House Connection Rules
For the EZ path, the deck must be securely anchored to the house with a ledger board using the standard's prescribed attachment details. Fasteners must be at least 1/2 in. in diameter, spaced no more than 16 in. on center, and staggered. Ledger attachment to wood-framed or masonry walls must follow the standard, and the ledger may not rely solely on non-structural masonry veneer. Other code-compliant attachment methods are not permitted through the EZ path and require plan review.
Guardrail Rules
The EZ Deck standard requires a guard around the deck perimeter where the deck is more than 30 in. above grade. The guard must be at least 36 in. and no more than 42 in. high, with openings no greater than 4 in.; guard posts may not be notched at the supporting connection and guard loads must transfer continuously into the deck framing. Zoning rules separately limit deck fences or guard rails to 42 in., with limited privacy-screen allowances.
Stair / Handrail Rules
For EZ decks on detached or semi-detached single-family dwellings, stairs must be at least 36 in. wide, have top and bottom landings at least 36 in. by 36 in., minimum 10-in. treads, maximum 7-3/4-in. risers, and handrail/railing height from 34 to 38 in. Ground-to-deck stairs are not permitted for attached buildings under the Zoning Code.
Roof Deck Rules
Roof decks are excluded from the EZ Deck standard and require a separate Building Permit. Under Zoning Code § 14-604(5), roof decks are permitted for residential uses in all zoning districts, while non-residential roof decks are prohibited except in CMX-3, CMX-4, and CMX-5 with special-exception approval. Roof decks are prohibited on accessory structures and generally must be set back at least 5 ft. from the extreme front building line, subject to the code's stated exceptions; roof-deck access structures have additional area, height, and setback rules.
Heavy Load Rules
The EZ Deck standard may not be used for a deck that supports a spa, hot tub, or other unusual dead or live load. Such a design departs from the EZ conditions and must follow the plan-based permit review path.
Plans & Professional Design
Prescriptive Plan Rules
Philadelphia's current EZ Permit Standard: Deck, revised August 2026 for the 2021 IRC, provides a no-plan prescriptive path for new decks attached to existing single-family dwellings. The deck must be in the rear yard, may not be above the first floor, is limited to 160 sq. ft. or 216 sq. ft. with intermediate posts, and must follow the standard's prescribed materials, footings, framing, attachment, guard, and stair details. It may not have roof or wall enclosures or support a spa, hot tub, or unusual load. Deviations require new permit applications and plans, and the standard cannot be used to legalize work already performed without a permit.
Professional Design Rules
A qualifying EZ Deck permit does not require construction plans. When plans are required, L&I's Building Permit plan requirements require the signature and seal of a Pennsylvania-licensed registered architect or professional engineer if any structural work is proposed, regardless of cost, or if the cost of work exceeds $25,000. More complex deck proposals outside the EZ standard follow Standard Review with plans.
Inspections
Inspection Stages
For permitted deck work, L&I lists a Virtual Footing Inspection (842) after footings are fully excavated and before concrete is poured, and a Virtual Deck Final Framing Inspection (819) after structural framing is complete and decking is fastened. The final framing inspection is required to close out the permit. Additional inspections may be assigned depending on the scope and permits involved.
What You Need Before Applying
Requirements
First determine whether the deck qualifies for the building-permit exemption. A non-exempt deck must receive the applicable Building Permit before construction and must comply with Philadelphia zoning and construction codes. A qualifying EZ deck must follow the current EZ Permit Standard: Deck, including its single-family attachment, rear-yard, first-floor, size, clearance, structural, and no-roof/no-heavy-load conditions; otherwise plans are required for Standard Review. A Zoning Permit must be obtained first when one is required. A licensed Philadelphia contractor generally performs permitted work, with the stated exceptions for qualifying work at existing one- or two-family homes.
Required Documents
For the EZ path, submit the permit application with the complete scope of work and current owner information; a settlement sheet or deed is required if the property was recently sold, and a tenant applicant must include the executed lease. EZ permits do not require construction plans. Projects outside the EZ standard require construction plans and any applicable zoning/site plan, professional seal, flood-protection documentation, historic approval, or other prerequisite approval required by the project and site.