Non-destructive entry first, always - and we re-key Schlage, Kwikset, and Baldwin locks on the spot while you watch
You get a price before we start. It does not change when we arrive. No surprises.
Fast, Reliable Lock Installation & Rekey Across Middletown
Lock rekeying in Middletown typically runs $18-$35 per cylinder, and full lock installation starts around $95 for a standard deadbolt, quoted in writing before any work begins. Most rekey jobs on standard pin-and-tumbler locks take under an hour. If you call (331) 310-8471, you’ll get a live person who can quote a firm price over the phone, and the technician who arrives is not permitted to change that price at the door. That rule has been in place since 2002, and it’s the foundation of how we work in Middletown.
Key Takeaways
- Rekey pricing in Middletown runs $18-$35 per cylinder, lock installation from $95-$220 depending on hardware grade
- We service the full age range of Middletown housing, from 1920s mortise-lock originals to modern smart locks
- Same-day landlord rekeys are a core part of our local workload, especially on the south side and Grand Avenue corridor
- Every job gets a written price before work starts, a documented photo record when we finish, and a 365-day warranty
Why Novak Lock & Security Is Middletown’s Preferred Lock Installation & Rekey Company
Since 2002, we’ve installed, rekeyed, or serviced over 60,000 locks, keys, and security systems, and Middletown’s particular housing stock shows up in our work constantly. The city’s residential core was built during the steel and paper mill boom between the 1920s and 1950s, which means we see original mortise-lock assemblies, skeleton-key hardware, and doors that have shifted over decades of freeze-thaw cycles. We know what those locks need before we even open the door. That local experience means fewer surprises for you, and a faster, cleaner job.
Our Lock Installation & Rekey team includes technicians who work regularly in neighborhoods like the south side, Grand Avenue, and the older streets around Central Avenue. Reviews from Middletown customers consistently mention two things: the price we quoted on the phone matched the invoice, and the tech left a photo record of the finished work. We answer calls around the clock with a live person, not an automated queue. When you need a rekey done before a new tenant moves in, that response time matters.
Our Lock Installation & Rekey Services in Middletown

Smart Lock Installation
A smart lock installation in Middletown typically runs $150-$350 including the hardware if you supply your own, or $250-$600 for a lock we source and install. The big variable here is your door. Many Middletown homes built before 1950 have mortise-lock cutouts that do not accept a standard cylindrical smart lock without a conversion plate or some carpentry. We’ll tell you honestly if your door needs modification, and we’ll quote that modification in writing before we start.

Keyless Entry & Keypad Lock Installation
Keypad and keyless entry locks are popular with Middletown landlords who manage high-turnover rentals, because a code can be deleted in seconds when a tenant leaves. Installation for a keypad deadbolt ranges from $110-$220 in Middletown, depending on whether we’re replacing an existing deadbolt or drilling new bores. For older doors with worn-out preps, we may need to add a reinforcement plate around the latch area, which adds roughly $25-$45 in materials.

Biometric Lock Installation
Biometric locks cost more but eliminate the key problem entirely. In Middletown, a fingerprint or Bluetooth biometric deadbolt installation usually lands between $250-$450. These locks use a motorized bolt that draws more battery current, and on warped doors where the bolt has to fight the strike plate, battery life drops fast. We check the door alignment during the install and adjust the strike plate so the motor isn’t working against a crooked frame. That’s a detail most generic installers skip.

Key Duplication
Key duplication in Middletown is a same-day service. Standard house keys run $2-$5 per copy, and we can cut high-security keys from brands like Medeco, Mul-T-Lock, and Abloy if you bring the original and the card that came with it. For older Middletown homes with skeleton keys, we can often cut a new one from the existing key or from the lock code stamped on the cylinder, though some pre-1930 originals need to be fitted by hand rather than cut on a standard duplicator.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Middletown
We work on the full range: Schlage, Kwikset, Baldwin, Yale, Sargent, and high-security cylinders from Medeco and Mul-T-Lock. For Middletown customers, that means we don’t have to special-order parts for a Baldwin mortise lock on a 1930s Colonial, and we keep common cylinders, strike plates, and spindle assemblies on our vans. If you’ve got a Sargent mortise lock on an old commercial building in the Central Avenue district, we can typically service it on the first visit rather than telling you to wait for a part from a catalog.
Common Lock Installation & Rekey Problems We See in Middletown Homes

- DIY rekey kits stripping old set screws. On 1920s-1950s pin-and-tumbler cylinders, the tiny set screws are often corroded in place. A homeowner using a big-box rekey kit will round off the screw head or break the cylinder entirely, leaving the lock in a half-disassembled state that requires non-destructive entry just to open the door. We see this at least monthly on Middletown’s older streets.
- Universal strike plates failing on warped doors. Previous handymen often install generic strike plates that don’t line up with the original mortise pocket. On a warped door, the deadbolt hangs up or won’t extend fully. The door then pops open with a shoulder bump. We replace the strike plate and, when needed, deepen the pocket so the bolt seats fully.
- Landlords rekeying between tenants but skipping the master key system. A landlord rekeys the unit lock but never re-pins the master key, so a former tenant’s key still opens a common laundry room, a rear door, or another unit. We re-pin the master system itself, and we document which keys work where. For Middletown property managers running dozens of units, this is standard operating procedure, not an upsell.
- Frozen cylinders from southwest Ohio winters. Middletown gets repeated freeze-thaw cycles through the winter, and older exterior doors with thin weatherstripping let moisture into the lock cylinder. That moisture freezes, the key won’t turn, and forcing it snaps the key off inside the plug. We see this most often on back doors and detached garage doors. The fix is usually a cylinder rebuild plus proper weatherstripping around the door, not just graphite spray.
Pricing for Lock Installation & Rekey in Middletown, OH
Here’s what you can expect to pay in Middletown for the most common jobs. A standard rekey runs $18-$35 per cylinder, with most homes having 2-4 cylinders to rekey. That’s $65-$140 total for a typical three-lock house, quoted before we dispatch. New deadbolt installation runs $95-$160 for a standard grade-2 lock in an existing prep. A full mortise-to-cylindrical conversion on a 1930s door runs $180-$320 because it involves drilling, chiseling, and strike plate work, not just mounting a new lock. Keypad and smart lock installations fall in the $110-$450 range depending on the hardware and door condition. The price we quote on the phone is the price on the invoice. Haven Standard Clause 1: no tech is permitted to change the price at the door. If you bring us a written estimate from another locksmith, we’ll review it at no charge.
Call (331) 310-8471 for an exact quote. Estimates are free, and the person who answers can tell you what the job will cost before anyone is dispatched.
We Also Serve Cities Near Middletown

Our dispatch covers all of Butler County and the wider southwest Ohio corridor. We handle lock installation and rekey in Hamilton, Mason, Fairfield, and Dayton with the same written pricing rule. If you’re a landlord with properties across multiple Middletown ZIP codes or in the surrounding suburbs, one call covers the whole portfolio.
Serving Middletown, OH - Our Local Coverage Area
We’re based in the Middletown area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Lock Installation & Rekey in Middletown

Yes, most original 1920s-1950s mortise locks in Middletown can be rekeyed in place. We disassemble the lock body, extract the old cylinder, re-pin it to a new key, and lubricate the spindle and springs before reassembly. The exception is when the lock body itself is cracked or the spindle is frozen solid from 80 years of paint and rust, in which case replacement is the honest call. A mortise rekey usually runs $35-$60 per lock body, slightly more than a standard cylinder rekey because of the disassembly time. Call (331) 310-8471 and we’ll tell you what your specific lock needs.
You only need to rekey, not replace, unless the hardware is damaged or the locks are original and failing. On a foreclosure purchase in Middletown’s south side, we typically rekey every exterior cylinder, verify no interior locks or chain bolts are holding a surprise key, and give you a full key map so you know exactly how many keys exist. We also check for any key still in the hands of the previous occupant, family members, or a property manager. Same-day foreclosure rekey service is available, and we quote the full price before dispatch.
Yes, in most cases, but it’s a conversion, not a straight swap. We remove the mortise lock body, fill or cover the existing cutout, bore a standard cylindrical prep, and install the smart lock. On a 1930s door with glass knobs, we can often leave the old knob as a dummy handle and install the smart lock above it. The conversion in Middletown runs $180-$320 including the door prep, and we’ll tell you before we start if the door’s integrity makes a smart lock a bad idea. Some original doors from the steel era have lead paint under the topcoat, which affects how we drill.
Yes, this is the largest single category of locksmith work in Middletown. We rekey between tenants on the same day you call, usually within a few hours, and we charge per cylinder, not a flat “door fee.” For landlords running multiple units on the south side or along Grand Avenue, we can set up a recurring rekey schedule and maintain a master key system that actually works. The rekey price is the same whether it’s one door or twenty, and you get a photo record of every finished lock. Call (331) 310-8471 and tell the dispatcher it’s a rental turnover.
It’s both. Middletown gets enough freeze-thaw cycles through the winter that unprotected cylinders on poorly weatherstripped doors take in moisture, and that moisture freezes inside the plug. On a lock that’s already worn, the freezing is worse because the pins bind. The fix is not just lubricant. We disassemble the cylinder, clean out the corrosion, re-pin it if needed, and often recommend adding a weatherseal to the door so the problem doesn’t return. A cylinder rebuild in Middletown runs $25-$45, and the weatherstripping work is usually under $60.
Written by Daniel Novak, Owner at Novak Lock & Security. Every job in Middletown starts with a written price and ends with a documented photo record.






