THE STEPS TO BUILDING YOUR DREAM ROOFDECK IN PHILLY
Philadelphia is a city that offers one of the most beautiful rooftop views. From the glassy towers of the centre city to tight alley glimpses of South Philly, roof decks have become a desired feature for city homeowners. Owning a rooftop deck can be quite refreshing, especially when living in the city, as it gives the ability to disconnect from the stimulation and noise of the city while enjoying the views it has to offer. But before you can indulge in the sweetness of everything a roof deck has to offer, you need to understand that building a roof deck in Philly isn't quite as simple as putting down decking and adding light. Several steps and regulations need to be followed to end up with your dream deck.
ZONING AND ROOFDECKS
In many Philly neighborhoods, roof decks have become a stable feature in urban living. On the other hand, this doesn't mean that everyone is automatically eligible to have one. Philadelphia's zoning code can be strict, especially when it comes to residential roof decks. Continue reading to learn more about code constraints that can complicate a roof deck project.
Roof Deck Rules and Realities
Height Restrictions
In most residential rowhome zones, buildings are limited to 38 feet in total height.
38 ft in height includes parapet walls, guardrails, pilot houses, and even HVAC equipment.
If adding a deck and its features pushes you to go above 38 feet, your project could need a zoning variance.
Deck Placement Rules
Front-facing roof decks (visible from the street) are prohibited.
Roof decks generally need to be set back far enough so they are not visible from across the street at ground level - typically this distance is 8 feet.
Setbacks and Pilot Houses
A roof deck needs stair access. You can design a roof hatch with a ladder or stairs, which is easier to get approved, but not very comfortable to use. Or you can design a pilot house which comes with its own separate restrictions:
No more than 10 feet in height.
No more than 125 sqft in area.
Set back from both the front face and any shared property line.
By-Right vs. Zoning Variance
If your project complies with the zoning code, you will be allowed to build by right, a faster path to permitting.
If your deck violates the restrictions, you will need to file a zoning variance, which includes:
A registered community organization meeting.
A public notice posting.
A zoning board of adjustment hearing.
This process can add 2-3 months to your build timeline.
DON'T RELY ON OTHERS. JUST BECAUSE YOUR NEIGHBORS HAVE A DECK DOESN'T MEAN YOU CAN BUILD ONE TOO. Lots of decks were built before code changes and approved under different zoning categories and many are built illegally with expensive violations.
NOT ALL ROOFS CAN HANDLE A DECK
Most row homes weren’t built to make roof deck additions, which means that the loads of these roofs may not be fit to handle the weight.
You will likely need a structural engineer to assess the conditions of your joists and roof framing prior to building a roof deck. Most roof decks require:
Reinforced or new structural beams
Upgraded or replaced roof membrane
Careful detailing around any existing penetrations
Parapet walls built up from structurally sound parti walls
PERMIT PROCESS (What you typically need for a roof deck permit in Philly)
Drawings of existing conditions
Proposed plans, elevations, sections (showing deck size, access, railing height)
Zoning Analysis
Possibly a structural report
Once plans are submitted, the Department of Licenses and Inspections will review them.
A THOUGHTFUL DESIGN IS A SMART INVESTMENT
A strong design can be more than just an outdoor space- it can add resale value and transform the way you experience your home. When building your roof deck, it's important to consider the following points:
Durable materials that hold up to weather and time
Drainage plans to avoid water pooling
Integration with roof utilities such as vents, chimneys, and condensers.
FINAL THOUGHTS
A roof deck addition to your home is an update that comes with several positive points, whether that's giving the homeowner a unique living experience, creating a social space, or giving your home a major update. Without the right knowledge and help, it could be more difficult and time-consuming to follow through. We specialize in guiding homeowners through this process, starting from initial site visits to getting together code-compliant documents. We can help make your vision come to light- legally, beautifully, and efficiently. Let's talk about your rooftop dreams. Contact us to get started.
