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 Change Door Locks Across North Miami
Changing door locks in North Miami typically costs $95 – $240 for a standard knob or deadbolt replacement including labor, with rekeying running $65 – $145 for most single-cylinder setups. Most jobs are completed the same day, often within a 45 – 60 minute response window to neighborhoods along NE 125th Street, Biscayne Boulevard, and the Keystone Point area. If you’ve lost keys, bought a rental property, or just ended a lease in North Miami, call (910) 714-4287 and we’ll give you a written price before anyone rolls out. We’ve been part of the Threshold Group network since 2007, and the locks we install are selected specifically to survive what Biscayne Bay’s salt air does to hardware.
Why Dunmore Locksmith Is North Miami’s Preferred Change Door Locks Company
North Miami’s housing stock is different from what you’ll find ten blocks south in the Design District or over in Miami Shores. The bulk of our calls here come from 1950s and 1960s CBS concrete-block apartments and single-family rentals, places where the original entry hardware is still on the door and the bay air has had sixty years to work on the pins. We know what that means before we arrive: seized cylinders, rusted strike plates, and backset measurements that don’t match what the big-box store sold the landlord. That local knowledge changes the repair, not just the schedule.
Our Change Door Locks team covers North Miami daily, not as an add-on route. When you call, a live person answers, takes the address, and gives you a real arrival window. The technician sent to your door is background-checked, identity-verified, and arrives in a marked uniform with a photo ID badge. You’ll get the tech’s name and photo before the visit. That’s the Threshold Standard, and it’s the reason people who worry about who’s at the door choose us. Perry Osgood leads our North Miami service area, and every job he oversees carries the 365-Day Done Right Promise in writing: if the repair fails, we return at no charge.
We don’t bait you with a $19 service call. The price we quote on the phone is the price on the invoice, and there’s no call-out surcharge added when the tech arrives. North Miami customers tell us that’s the difference between a company they call once and one they recommend to the neighbor in the next unit over.
Lock Change in North Miami
Lock change in North Miami means removing the existing lock hardware entirely – knob, deadbolt, strike plate, and often the faceplate – and installing new hardware matched to the door’s existing prep and backset. Homeowners need a full lock change when the hardware is corroded beyond a simple cylinder swap, when they want to upgrade from a knob-only entry to a deadbolt, or when a tenant turnover leaves key control fundamentally broken. On most North Miami doors, a standard lock change runs $120 – $240 depending on hardware grade and whether the door prep needs modification. We quote the full price before we start.
CBS Door Prep and Backset Corrections
North Miami’s concrete-block construction complicates what should be a straightforward swap. Many 1950s and 1960s doors were prepped for knob-only locks with a 2-3/8-inch backset, and modern Grade 1 deadbolts typically require a 2-3/4-inch backset or a larger bore. When the prep is off, the new deadbolt sits short of the ANSI strike and the door never actually secures. Our techs carry drill jigs and reinforcement plates on every North Miami call, because we see this mismatch at least once a week along the rental corridors off NE 125th.
Strike Plate Replacement and Reinforcement
The strike plate is the steel plate screwed into the door frame where the deadbolt throws. On coastal properties near Biscayne Boulevard, these plates rust through, and the screws pull out of the concrete block. You can have a brand-new deadbolt and still have a door that one solid kick opens. We replace rusted strikes with stainless or marine-grade plates and use longer case-hardened screws that bite into the block, not just the jamb.
Change Lock Cylinder in North Miami
Change lock cylinder in North Miami is the fix when the lock’s external hardware is fine but the internal pin-and-tumbler stack is seized, corroded, or compromised. It means pulling the cylinder, replacing it with a new one keyed to a new set of keys, and reassembling the lock – without replacing the entire knob or deadbolt body. This is the single most common service call we run in North Miami, and it typically costs $85 – $160 per cylinder depending on the keyway and whether it’s a standard Schlage or a high-security Medeco. On a rental unit where the original cylinder has never been touched, this is almost always the right call.
Seized Cylinders from Bay Air
Salt-laden air off Biscayne Bay works into the cylinder through the keyway and the small gaps around the face. Over time, the brass pins and steel springs develop corrosion, the springs lose tension or collapse, and the key eventually stops turning or breaks off in the door. We pull the cylinder, clean the housing, and fit a replacement rated for marine exposure where the building sits close enough to the water that this is a recurring problem, not a one-time fix.
Master Key Cylinder Swaps for Multi-Unit Buildings
In a North Miami fourplex or low-rise rental building, changing a single cylinder usually reveals that the other units still share the same worn-out keyway, or that several old keys are floating around from past tenants. We can swap cylinders across every unit and key them to a single master system, so the owner holds one key and each tenant gets their own unit key. We quote that as a flat per-cylinder price, with a written scope before we start.
Trusted Brands We Service in North Miami
We’re factory-authorized to service and install Schlage, Kwikset, Medeco, and Yale hardware, which matters in North Miami because so much of the rental stock still carries first-generation Schlage and Kwikset cylinders that aren’t made the same way anymore. We stock common parts locally so a cylinder swap or lock change doesn’t turn into a week of waiting on a distributor. When a door needs a lock that actually survives the humidity and salt, we lean toward Medeco and Schlage’s stainless and brass-bodied lines. We don’t push hardware you don’t need, but we’ll tell you plainly when a bargain-bin Kwikset cylinder won’t last two summers on a Biscayne Boulevard entry door.
Common Change Door Locks Problems We See in North Miami Homes
- Corroded pin-and-tumbler stacks: The bay air works into the keyway and pits the brass pins until the key won’t turn, or turns so rough you’re afraid it’ll snap. This shows up fastest on vacant units left closed up between tenants, especially through the summer slow season.
- Rusted-through strike plates: The plate the deadbolt throws into pits and the mounting screws pull out of the concrete block. The deadbolt still throws, but the door hasn’t actually been secured for months.
- Backset mismatches from landlord quick-fixes: Someone swapped a Kwikset cylinder onto a door prepped for Schlage, or mounted a deadbolt at the wrong backset, and now the bolt sits short of the strike. The door locks, but a bump key or a credit card defeats it in seconds.
- Original hardware surviving five or more tenant cycles: Along the rental corridors off NE 125th, we regularly open doors where the original knob lock has never been rekeyed across a decade of occupants. The key control is gone, and usually so is the spring tension inside the cylinder.
Pricing for Change Door Locks in North Miami, FL
A standard lock change or cylinder change in North Miami runs $85 – $240 per door, with the exact number depending on whether we’re swapping a cylinder only or removing knob-only hardware and installing a Grade 1 deadbolt with a reinforced strike. Rekeying a single knob runs $65 – $95. Adding a master key system across a multi-unit building is quoted per cylinder, typically $30 – $50 above the standard cylinder change price per door. There is no call-out fee added when the tech arrives, and the price we give you on the phone is the price on the invoice. Call (910) 714-4287 for a free estimate with a written quote before any work begins.
We Also Serve Cities Near North Miami
While this page focuses on Change Door Locks in North Miami, our service area extends to Miami, Hialeah, Miami Gardens, and Homestead. If you’re just outside the North Miami city line, call and we’ll confirm coverage for your street. The same written pricing and the same 365-Day Done Right Promise apply.
Serving North Miami, FL - Our Local Coverage Area
We’re based in the North Miami 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 About Change Door Locks in North Miami
If the hardware is still functional and not corroded, a rekey is usually enough to restore key control – it changes the internal pins so old keys stop working. But if the original cylinder is seized, pitted, or a key is broken off inside, a cylinder change or full lock change is the honest fix. Call (910) 714-4287 and we’ll tell you which one applies to your door before quoting a price.
North Miami’s proximity to Biscayne Bay means salt-laden air and higher sustained humidity get into lock cylinders through the keyway, corroding the brass pins and steel springs. Vacant rental units left shut up through the summer make it worse, because the moisture sits inside the cylinder with no air movement. That’s why we stock stainless and brass-bodied replacement cylinders specifically for this area.
In most cases, yes – if the cylinder can be pulled with a key or a plug follower, we remove and replace it without touching the door prep. Drilling only becomes necessary when the cylinder is so corroded the plug won’t turn at all and there’s no working key to free it. We’ll tell you before we drill, and the price doesn’t change.
Stainless-steel deadbolts, brass-bodied cylinders with stainless internal springs, and marine-grade strike plates hold up far better than the thin-gauge zinc hardware found on many original CBS doors. Brands like Medeco and Schlage’s higher-end lines are built for this environment. We’ll match the hardware to your building’s distance from the water and whether the unit sits vacant part of the year.
Yes. We can rekey or change cylinders across every unit in the building and key them to a single master system, so you hold one key and each tenant gets their own unit key. We quote a flat per-cylinder price with a written scope, and we typically complete a fourplex-to-twelve-unit building in a single day. Call (910) 714-4287 and ask for Perry Osgood for a building-wide quote.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving North Miami as part of the Threshold Group network since 2007.






