Hear from Our Customers
You’re not dealing with a loose knob that jiggles every time someone closes the door. You’re not second-guessing whether the latch actually caught when you left for work. Your door knob replacement is installed square, tight, and functional—the kind of work that doesn’t need a follow-up call next month.
That’s what happens when a residential locksmith handles the job instead of a handyman with a YouTube video. The strike plate lines up. The screws go into solid material, not drywall dust. The lever sits level and turns smooth because the bore hole wasn’t drilled crooked.
You get door knob services that match the hardware you paid for. No rattling. No sticking. No wondering if you should’ve just hired someone who does this every day.
We’ve been helping Delaware County families since the late 1800s. That’s not marketing language—it’s the actual timeline. Tom McCausland is a fourth-generation locksmith, and his daughter Chrissy runs the largest locksmith operation in the Delaware Valley out of our Prospect Park storefront.
Marple homeowners call us because we’ve been doing door lever installation, lock changes, and security upgrades in this area longer than most companies have been in business. We’re not a franchise or a call center dispatch. We’re local, we stock OEM parts for Kwikset, Schlage, and Medeco, and we show up in a fully equipped mobile workshop—not a pickup truck with a toolbox.
When your neighbors recommend a locksmith, they’re usually talking about us. That’s what 140 years of doing the work right gets you.
You call or message with the issue—loose knob, broken lever, lock that won’t latch, or you just bought new hardware and need it installed. We give you preliminary pricing over the phone so there’s no guessing. Most door knob installation jobs in Marple get scheduled same-day.
We show up with the tools and parts already in the van. If you’re replacing an old knob, we remove it without damaging the door or frame. If the bore hole needs adjustment or the strike plate doesn’t line up, we handle that on-site. If you’re upgrading to a smart lock or need a deadbolt added during the same visit, we do it all in one trip.
Before we touch anything, we explain what’s wrong, what it takes to fix it, and exactly what it costs. No surprises. Once the new door knob or lever is in, we test the latch, check the alignment, and make sure it operates the way it’s supposed to. You’re not calling us back next week because something’s loose or crooked.
Ready to get started?
You’re getting professional lever installation or door knob replacement with OEM-quality parts that actually last. We’re not pulling generic hardware off a shelf at a big box store. If you need a keyed entrance knob, a passage lever for a hallway, or a dummy knob for a closet, we bring the right type for the job.
Marple homes—especially older ones near Sproul Road or around the Lawrence Park area—sometimes have quirks. Doors that aren’t perfectly square. Frames with hidden metal studs. Bore holes that were drilled slightly off-center decades ago. We’ve seen it all, and we adjust for it. That’s the difference between a lever repair that holds up and one that starts sagging in six months.
If you’re upgrading to smart locks or adding keyless entry, we handle the programming and integration on-site. Voice activation with Alexa or Google Assistant, mobile app setup, whatever the system requires. You’re not left with an instruction manual and a half-installed lock.
Labor typically runs between $37 and $190 depending on the complexity of the job and the type of hardware you’re installing. A basic passage knob replacement on a standard interior door sits on the lower end. A keyed entrance lever with a deadbolt addition, smart lock programming, or work on a door that needs bore hole adjustments will cost more.
We give you preliminary pricing over the phone before scheduling, so you’re not guessing what the bill will look like. If we find an issue once we’re on-site—like a strike plate that needs repositioning or a door frame that’s out of square—we explain what it takes to fix it and what it costs before doing the work.
The price includes the labor, the trip, and the expertise to install it without damaging your door or frame. If you’re using OEM parts from brands like Kwikset, Schlage, or Medeco, we stock those and can source them faster than you’d get from a hardware store.
Most jobs in Marple get done the same day, especially if you call in the morning or early afternoon. We run a mobile fleet out of Prospect Park, so we’re already close to your area and can usually get to you within a couple of hours.
If it’s an emergency—like you’re locked out of a room or desperately need a door knob change for security reasons—we prioritize that and aim for a 20-30 minute response time. Non-emergency installations get scheduled based on availability, but same-day service is the norm, not the exception.
The only time we might need to come back is if you’re ordering custom hardware or a specific smart lock model we don’t have in the van. In that case, we’ll let you know upfront and schedule the installation once the part arrives. But for standard residential locksmith work, we carry enough inventory to handle the job in one trip.
A passage knob is for interior doors where you don’t need a lock—hallways, closets, rooms where privacy isn’t the priority. It latches when the door closes, but there’s no key cylinder or locking mechanism. You just turn the knob and the door opens.
A keyed entrance knob is for exterior doors or any door where you need security. It has a key cylinder on one side and a thumb turn or twist lock on the other. This is what you’d use on a front door, back door, or any entry point where you want control over who gets in.
There’s also a dummy knob, which doesn’t turn or latch at all—it’s just for appearance, usually installed on the inactive side of a double door. If you’re not sure which type you need for a specific door in your Marple home, we’ll assess it when we’re on-site and recommend the right hardware. Installing the wrong type is one of the most common DIY mistakes, and it’s an easy fix when you know what you’re looking at.
Not if it’s done right. We remove old hardware and install new door knobs without damaging the finish, splintering the wood, or cracking the frame. That’s the advantage of hiring a residential locksmith instead of forcing it yourself or hiring someone who doesn’t do this regularly.
The damage usually happens when someone tries to drill a new bore hole without measuring correctly, strips the screws by over-tightening, or uses the wrong size bit and cracks the door. We’ve seen homeowners accidentally gouge the door face trying to pry off an old knob, or chip the paint around the strike plate because they didn’t remove it carefully.
We use the right tools for the job—not a hammer and a flathead screwdriver. If the existing holes don’t line up with your new hardware, we’ll fill and re-drill them properly. If the door frame has metal or masonry behind the drywall, we have the bits and fasteners to handle that without cracking anything. You’re not patching and repainting after we leave.
Yes. We install smart locks, keyless entry systems, and voice-activated door hardware for Marple homeowners upgrading their security. That includes programming the lock to work with your phone, connecting it to your home network, and integrating it with Amazon Alexa or Google Assistant if that’s part of the system.
The installation itself is similar to a standard door knob replacement, but smart locks often require firmware updates, app pairing, and user code setup. We handle all of that before we leave, so the system is fully functional and you’re not troubleshooting connectivity issues on your own.
If you’re replacing an old deadbolt with a smart lock, we’ll make sure the bore hole is the right size and the strike plate aligns correctly. Some smart locks are thicker or heavier than traditional hardware, so the door needs to close flush and latch smoothly, or the motor won’t engage properly. We test it, adjust it, and make sure it works the way the manufacturer designed it.
We handle the full job in one trip. If you need a deadbolt installed along with your door knob replacement, we do both. If you want the locks rekeyed so all your doors use the same key, we take care of that on-site. If you’re upgrading multiple doors or adding lever repair to a bedroom that’s been sticking, we bring enough parts and tools to finish everything during the same visit.
That’s one of the advantages of calling a locksmith with a fully equipped mobile workshop instead of a general handyman. We’re not making a second trip because we didn’t bring the right strike plate or ran out of screws. We stock the parts, we know the process, and we’ve done enough door knob installation in Delaware County to anticipate what a job will need before we show up.
If you have other lock-related work—mailbox locks, window locks, garage door hardware—we can assess that while we’re there and give you pricing if you want it handled. Most Marple homeowners prefer to knock out everything in one appointment instead of scheduling multiple service calls.
Local Resources
