Dated Locks Are a Philadelphia Security Problem
Philadelphia has more pre-war and mid-century rowhouses than almost any city in America. That’s part of what makes the city architecturally remarkable — and part of what makes its residential security landscape uniquely problematic. A significant portion of those hundreds of thousands of homes still have the original door hardware from when they were built or last renovated, often decades ago. In 2026, that’s a security gap that costs homeowners and renters every year.
The Rowhouse Lock Problem
South Philly rowhomes from the 1920s and 30s. Fishtown and Kensington brick rows from the 40s and 50s. West Philadelphia and Germantown homes from the 60s and 70s. Many of these properties have changed hands multiple times — bought, rented out, sold again — without anyone ever updating the locks. The original hardware keeps working, sort of, and nobody pulls it out until it fails completely.
The problem isn’t just age. It’s what age does to a lock. Pins wear down, tolerances open up, springs weaken, and cylinders develop play in the housing. A lock that took real skill to defeat in 1978 might give way to a credit card shimmy or a moderate bump attack today — not because the design was bad, but because 50 years of use, weather, and neglect have compromised the mechanism.
Add to that: no one knows who has a key. Previous tenants, past landlords, contractors, ex-roommates — in a city with high rental turnover, a lock that’s never been rekeyed could have dozens of keys floating around the neighborhood.
If you moved into a Philadelphia rental or purchased a home and didn’t immediately rekey or replace the locks, you don’t know who has access. This is one of the most overlooked security gaps in the city. A rekey costs $20–$35 per lock plus a service call — it’s not a significant investment for the security it provides.
How Old Locks Fail
Old locks don’t usually announce their failure with a dramatic snap. They degrade gradually, and most people don’t notice until they’re standing at their door in the rain jiggling a key for thirty seconds. Here’s how the failure modes typically manifest:
Worn Pins and Springs
Pin tumbler locks rely on precisely sized spring-loaded pins. After decades of use — thousands of insertions, extractions, rotations — the pins wear down unevenly and the springs lose tension. When this happens, the pins don’t sit at their correct heights anymore. The lock becomes easier to pick or bump because the tolerances are so loose that pin manipulation is barely necessary.
Cylinder Wobble
A cylinder that wobbles in the housing is a cylinder that’s been compromised. In original condition, the cylinder is held firmly by a retaining clip and machined to close tolerances. Age, improper key use, and previous forced entry attempts can loosen this fit. A wobbly cylinder can sometimes be turned with no key at all using a tension wrench — no pick required.
The Key-Won’t-Turn-Without-Jiggling Problem
This is usually the first sign people notice. The key goes in fine but requires a specific angle or jiggle to engage. This means the pins are worn unevenly and the shear line only aligns in certain positions. The lock works, barely — but the mechanism is compromised and the security rating has dropped significantly.
Shimmy Vulnerabilities
Knob locks (as opposed to deadbolts) are also common in older Philadelphia homes, and aged knob locks are often shimmy-vulnerable — meaning a flexible card or tool inserted between the door and frame can retract the spring latch without any key at all. This is purely a problem with knob locks, not deadbolts, but many older Philly doors use knob locks as the primary security hardware because deadbolts weren’t standard in residential construction until the 1980s.
The Grade 1 vs. Builder-Grade Difference
Lock quality is standardized by ANSI/BHMA (American National Standards Institute / Builders Hardware Manufacturers Association) into three grades:
- Grade 3 (Builder-grade): Minimum residential standard. Required to withstand 250,000 open/close cycles and light force attacks. Most budget hardware and original equipment in older Philadelphia homes falls here. No pick resistance requirements.
- Grade 2 (Residential): 500,000 cycles, better construction, some pick resistance. Mid-range consumer hardware.
- Grade 1 (Heavy Duty): 1,000,000 cycles, highest physical strength, significant anti-pick features. Schlage B60N and better. This is what you want on exterior doors.
The difference isn’t just durability — it’s attack resistance. A Grade 1 deadbolt requires significantly more force to kick through (250 lb. kick force vs. 75 lb. for Grade 3), has tighter manufacturing tolerances that make picking harder, and is built to last decades without degradation. If your locks are builders-grade, you’re essentially using the minimum viable security hardware.
What an Upgrade Actually Costs
The number one reason people don’t upgrade their locks is a wildly inflated assumption about cost. People imagine lock upgrades as an expensive renovation project. The reality is more modest:
| Service | What’s Included | Typical Cost (Philadelphia) |
|---|---|---|
| Rekey existing lock | New key, existing hardware stays | $20 – $35 per lock + service call |
| Full rekey (3 locks) | All rekeyed to one key | $95 – $140 total |
| Replace with Schlage B60N | Hardware + installation | $90 – $140 per door |
| Replace 2 exterior locks (Schlage B60N) | Front + back door | $200 – $300 total |
| Upgrade front to Medeco | High security hardware + install | $200 – $350 |
| Prices for Philadelphia, PA. Service call included. Call (215) 554-6109 for a specific quote — we come to you, no trip required. | ||
Replacing two exterior locks on a typical Philadelphia rowhouse with Grade 1 Schlage deadbolts runs $200–$300 total for a licensed locksmith visit, hardware included. That’s not a renovation — that’s less than a monthly streaming budget. For a one-time investment that protects everything in your home, it’s among the highest-value security upgrades available.
Ready to upgrade your Philadelphia home’s locks?
We come to you — on-site installation, flat-rate pricing, licensed and insured since 2008.The Landlord Question
Philadelphia has a large rental market, and the landlord-tenant dynamic around locks is a recurring frustration. Many landlords don’t upgrade locks between tenants — either because they don’t see it as a legal requirement (it isn’t, specifically) or because they’re passing costs to tenants implicitly through rent.
Under Pennsylvania law and Philadelphia’s housing code, landlords must maintain rental units in a habitable and safe condition. A completely broken lock is a code violation. A functioning-but-insecure lock is harder to challenge legally. The practical options for renters:
- Request a rekey in writing when you move in. Document it with your landlord. Some will do it as a matter of course.
- Upgrade and reinstall. If you replace a lock at your own cost, keep the original hardware. Reinstall it when you move out and take your upgraded lock with you. Just confirm with your landlord first — some leases prohibit modifications.
- Add secondary security. Door security bars, door reinforcement kits, and window pins don’t require landlord permission and add meaningful protection.
When to Upgrade
The answer to “should I upgrade my locks?” is yes in any of these situations:
- You moved into a home (bought or rented) with existing hardware and didn’t rekey immediately
- A previous tenant, contractor, or anyone else had a key and no longer does
- Your lock shows visible signs of wear — wobble, key jiggle, visible corrosion
- Your deadbolt is a knob-only lock (no separate deadbolt throw)
- You’ve lived in the same place for more than 10 years without any lock update
- Your door frame around the strike plate is worn or damaged — the frame failing under a kick is more common than the lock failing
A Grade 1 deadbolt on a weak strike plate installation is only as strong as the wood around three screws. Upgrading to a reinforced strike plate with 3-inch screws that reach the door stud adds significant kick resistance for about $15 in hardware. We install these whenever we replace a lock — it’s the most overlooked part of door security in Philadelphia rowhouses.
Age of lock equals age of security gap. If you don’t know when your locks were last replaced, that’s your answer: they need attention. The cost is modest, the upgrade is quick, and a licensed mobile locksmith comes to you — no trip to a hardware store, no guessing at installation. One call, one visit, and your home’s first line of defense is actually doing its job.
Dated Locks — Philadelphia FAQ
How do I know if my locks are too old?
Several signs point to locks past their useful life: the key feels loose or wobbly, the deadbolt doesn’t throw smoothly, the key requires jiggling to turn, you can see visible wear or corrosion around the keyway, or you simply don’t know how old the lock is and moved in with existing hardware. If you’re in a rowhouse built before 1990 and have never replaced the locks, assume they’re overdue.
How long do door locks last?
A quality deadbolt from a reputable manufacturer like Schlage or Medeco should last 20–30 years under normal use. Budget builders-grade hardware may only last 7–10 years before mechanical failure becomes noticeable. In Philadelphia’s climate, exterior locks that aren’t protected by storm doors degrade faster due to humidity and temperature swings. The security rating drops long before the lock stops functioning entirely.
What’s a good lock upgrade for a Philadelphia rowhouse?
For most Philly rowhouses, the Schlage B60N deadbolt is the right call — it’s ANSI Grade 1, has anti-pick pins, and is priced reasonably. If your neighborhood has seen break-in activity, consider a Medeco or Mul-T-Lock for the front door. Always pair a good deadbolt with a reinforced strike plate — the frame is often what fails first under a kick, not the lock itself.
Does my landlord have to upgrade my locks?
In Pennsylvania, landlords must maintain rental properties in a habitable and safe condition. There’s no specific law requiring a particular lock grade, but a completely broken lock is a code violation. Philadelphia’s housing code requires functional locks on entry doors but doesn’t specify security grades. If your landlord won’t upgrade, upgrading yourself and reinstalling the original hardware when you leave is often the practical solution — just confirm with your landlord first.
How much does it cost to replace all the locks in my home?
A typical Philadelphia rowhouse has 2–3 exterior doors. Replacing all of them with Schlage B60N deadbolts runs $200–$400 total for a licensed locksmith visit, hardware included. If you upgrade the front door to a Medeco or Mul-T-Lock, add $150–$200 for that door. Interior door locks rarely need upgrading from a security standpoint. Call (215) 554-6109 for a specific quote — we give you the total before we arrive.
Upgrade Your Philadelphia Home’s Locks
Our mobile locksmith comes to you — on-site lock replacement and rekeying, flat-rate pricing, licensed and insured since 2008. We serve all Philadelphia neighborhoods.
(215) 554-6109 — Mon–Sat 9am–9pm, Sun 10am–7pm