Philly RSA-3 Mixed-Use / Possible Triplex Conversion — Looking for Zoning Experience

[Charles Lundquist]

Hey everyone,

I’m looking at a property in Philadelphia and wanted to see if anyone has dealt with a similar zoning/use situation.

The property is currently zoned RSA-3. The city/property description says something like “Row mixed commercial/residential — built as residential.”

Historically, the building appears to have been used as a commercial space on the first floor with residential above. I also found old L&I/use-registration paperwork from the 1960s that seems to support a prior cleaning/pressing commercial use with a dwelling unit.

The physical layout/framing appears to support:

• commercial space on the first floor
• two small residential units above

The plan would ideally be to legally restore/convert it into either:

1. commercial space + two residential units, or
2. possibly three residential units

I understand RSA-3 is generally single-family by-right, so I’m trying to figure out whether this would likely be treated as:

• restoring a prior legal nonconforming mixed-use
• a use-registration issue
• a variance/ZBA issue
• or something L&I would likely reject without clear proof of prior legal multifamily use

I’m already speaking with a lawyer/permit professional, but I’d love to hear from anyone who has personally dealt with Philly zoning on similar properties.

Main questions:

Has anyone successfully restored a mixed-use or multi-unit setup in an RSA-3 property based on historical use records?

How much weight does L&I/ZBA usually give to old use-registration permits or historical commercial use?

If the old record shows commercial + one dwelling, but the building appears framed for two apartments above, is there any realistic path to legalizing commercial + two units?

How long did the process take, and what were the biggest surprises?

Would you treat this as a manageable zoning issue or a major red flag?

Any insight from Philly investors, zoning attorneys, expediters, or people who have gone through ZBA would be really helpful. Thanks.

[Stuart Udis]

RSA-3 is a single-family zoning classification in Philadelphia. As Sheryl correctly suggests there is a lot of complexity to Philadelphia zoning. The general rule to follow is active rental license or rental license for 3 units that has been active within 3 years supports re-activating the rental license and having a legal 3 family use. If more than 3 years have passed but there was a 3-family rental license you MAY receive a billing statement for back rental license fees and penalty but in many cases a variance is required. This adds additional complications and wrinkles to feasibility and overall process. Change of use often triggers the need for a sprinkler system which cannot easily be absorbed in many price point properties in Philadelphia. Best advice is to seek out opportunities that have correct in place zoning. This means do not settle on real estate without an active rental license in place. This is particularly important for investors who do not have a lot of experience navigating Philadelphia zoning.