A survey from 1962 can still tell you a lot about your lot. What it can’t tell you is what happened to that lot in the sixty years since.
If you’ve typed “survey companies near me” into Google after finding an old, yellowed property survey in a filing cabinet, you’re not alone. Philadelphia is full of properties with surveys that predate cell phones, GPS, and in some cases, the current owner’s grandparents. Here’s why a local surveyor will often ask you to get a new one, even if the old one looks fine on paper.
Philadelphia’s Rowhome Subdivisions Weren’t Always Platted the Way Records Show
Walk through neighborhoods like Fishtown, Kensington, or parts of South Philly and you’re standing on land that was carved into rowhome lots back when streetcars, not cars, decided where people wanted to live. Many of these blocks were platted in the early 1900s, sometimes earlier.
Back then, surveyors worked with chains, tapes, and compasses. Distances were sometimes paced off by foot rather than measured with precision tools. A few inches of error on one lot doesn’t sound like much. But stretch that error across a full block of fifteen or twenty rowhomes, and the small mistakes start to stack up.
Every time a lot got resurveyed or a deed got rewritten over the decades, that early rounding got carried forward. A surveyor today isn’t fixing a mistake you made. They’re untangling a small error that’s been quietly passed down for a hundred years.
When the Monument Is Gone, the Survey Line Becomes a Guess
Every boundary survey depends on physical markers in the ground. Iron pins. Stone posts. Sometimes an old pipe was driven into the dirt decades ago. These markers are how a surveyor proves where a line actually sits, not just where a deed says it should sit.
In older neighborhoods, these markers rarely survive untouched. Sidewalks get repoured. Driveways get repaved. A row of hedges goes in where a pin used to be. After enough decades, the physical proof that once anchored the property line is gone.
When that happens, a surveyor has to work backward. They pull old plats, deeds, and neighboring surveys, then walk the ground looking for any remaining clue, an old fence line, a shared wall, a stub of buried pipe, anything that lines up with the record. Rebuilding a boundary this way takes more time than confirming one that’s still marked. That’s a big part of why an update on an older property costs more than a quick recheck on a newer one.
Zoning and Setback Rules Have Changed Since the Original Survey Was Drawn
A survey is a snapshot. It shows your lot lines and structures as they were on the day it was drawn, measured against the zoning rules in place at that exact time.
Philadelphia’s zoning code has been rewritten and amended many times since a lot of these old surveys were made. A garage that sat well within the setback line in 1975 might not meet the current setback distance today. A property that had no issue with lot coverage decades ago might now sit right at, or over, the modern limit.
This matters most when you go to pull a permit. The city checks your project against today’s code, not the code from when your house was built. If your only reference is an old survey, you’re planning around rules that don’t apply anymore. A new survey gives you a current picture to build a permit application on, instead of guessing.
Utility Easements Added After the Original Survey Rarely Appear on Old Plats
Utility easements get added to property records all the time, often without the property owner noticing. PECO, the water department, or the city might record a new easement for a gas line, sewer connection, or electric run years after your original survey was completed.
Your copy of the survey doesn’t update itself when that happens. It just sits in the filing cabinet, unaware that a new easement now runs across part of your yard.
This becomes a real problem the moment you plan to dig. Put in a new fence, plan a garage foundation, or start excavating for a pool, and you could hit a line that wasn’t on your radar because it wasn’t on your old survey. A licensed surveyor pulls current records before marking your property, catching easements your original survey never had the chance to show.
Title Companies and Lenders Set Their Own “Survey Age” Cutoffs
Here’s a reason that has nothing to do with opinion and everything to do with policy. Title companies and mortgage lenders often set a hard limit on how old a survey can be before they’ll accept it for a closing or refinance. That limit isn’t set by law. It’s set by each lender or insurer, and it commonly falls somewhere between five and ten years, though it varies quite a bit from one company to the next.
If you’re selling a rowhome in Fishtown with a survey from twenty years ago, don’t assume it’ll pass. Call your title company or lender first and ask directly what their cutoff is. If your survey is older than what they’ll accept, you’ll need a new one before the deal can close, no matter how accurate the old one still is.
This is one of the most common reasons homeowners in older subdivisions end up searching for a surveyor. Not because something changed on their property, but because a bank or title company needs a fresh set of eyes on it.
