Smart locks
House lockouts
Re-keying
Deadbolt upgrades
Schlage
Kwikset
Car keys & fobsNon-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.
Get your free estimateLocksmith in Cassopolis, MI
Rekeying locks in Cassopolis means working on two very different types of hardware in the same afternoon: a 19th-century mortise lock on a Broadway storefront, then a corroded 1950s cottage lockset ten minutes away near Diamond Lake. Reliance Lock & Key has served Cassopolis since 2016, and we’re equipped for both ends of that spectrum, from Kwikset and Schlage on village homes to restricted high-security systems like Medeco and Mul-T-Lock on county offices. If you’ve just moved, lost a key, or bought a lake cottage with unknown key history, call (855) 341-7491 for a straight answer and a free estimate before anyone is dispatched.
Why Cassopolis Homes Are Different
Cassopolis sits in southwest Michigan’s lake-effect snow belt, and that single fact drives more lock service calls here than anything else. Freeze-thaw cycles heave door frames out of square through late winter and early spring, which means deadbolts that worked fine in October suddenly won’t throw in February. Exterior locks on the lake side of town collect ice in the keyway, and the humid summers around Diamond and Eagle lakes corrode inexpensive cottage locksets faster than you’d expect. We routinely open locks that are frozen solid or packed with rust, and we rekey doors that have shifted so far the latch no longer lines up with the strike plate.
The housing stock splits into two distinct worlds. Downtown Cassopolis, being the Cass County seat, has 19th- and early-20th-century brick and wood-frame buildings near the courthouse square, many still running original mortise locksets that require real hardware knowledge to service properly. The lake communities, by contrast, are dominated by mid-century seasonal cottages and cabins, often with original or lightly upgraded door hardware that’s been fighting Michigan weather for sixty years. A locksmith who only knows modern tubular locksets will struggle with the old mortise bodies on Broadway, and one who never leaves the village won’t understand why a cottage door swells shut every July.
Because Cassopolis is the county seat, there’s also a steady stream of courthouse-adjacent commercial work: storefronts and offices on Broadway needing master-key systems, panic hardware, and restricted key control. That’s a different job than rekeying a lake cottage, and we’re set up for both.
Styles & brands we work with







Our Main Cassopolis Services
Most calls we take from Cassopolis fall into two categories: people who’ve lost or broken a car key and need to get moving again, and people facing a lock emergency that can’t wait. Here’s what each looks like around here.
Car Key Replacement in Cassopolis
Losing a car key in Cassopolis is a different problem depending on where you are. At the courthouse or a Broadway shop, you’re likely worried about getting home; at a Diamond Lake boat launch, you’re staring at a locked vehicle with a key on the seat and no spare. We cut and program replacement car keys on-site, including transponder and push-to-start keys, and we do it without sending you back to the dealership. If your key is worn, cracked, or just stopped turning in the ignition, we can replace it same day in most cases. Read more on our dedicated Car Key Replacement in Cassopolis page.

Emergency Locksmith in Cassopolis
Lockouts, break-in repairs, locks that fail in the middle of a Cassopolis winter, a key snapped off in a lake cottage deadbolt: these are the calls where waiting isn’t an option. We respond to the village and the lake communities around it, and we carry the tools and lock hardware to fix the problem on the first trip rather than making you wait for a second visit. If someone tried to force your door overnight, we can secure it properly before we leave. Details are on the Emergency Locksmith in Cassopolis page.

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.
Rekey Locks in Cassopolis

Rekeying is the smartest first move after any change in your living situation, and in Cassopolis it’s more common than you might think. Seasonal cottage owners rekey at the start of every summer when keys have been floating around among renters, family members, and neighbors all winter. Downtown landlords rekey between tenants, and anyone who’s bought an older village home should assume the previous owner’s relatives still have a working key. Reliance Lock & Key has served Cassopolis since 2016, and our rekey service is a cost-effective alternative to full lock replacement, whether you’re working with a Kwikset deadbolt or something more involved. Here’s more on our Rekey Locks service and what you can expect.
Lock Rekey
Signs you need it
You’ve moved into a new home, ended a tenancy, lost a key, or have any reason to believe someone outside your household may still hold a key to your door.
What it costs in Cassopolis
A standard lock rekey in Cassopolis typically runs $65 to $120 per lock when we come to you, and less per lock if you bring the hardware to us.
How we do it
We disassemble the lock cylinder, swap the internal pins to match a new key, reassemble it, and test the new key in the door while confirming all old keys are dead.
Rekey Service
Signs you need it
You have multiple exterior doors keyed differently and want one key to work every lock, or you’ve just taken ownership of a building with unknown key history.
What it costs in Cassopolis
A full rekey service call in the Cassopolis area, covering the trip and the first lock or two, generally runs $75 to $120 plus $15 to $25 per additional cylinder.
How we do it
We arrive with pinning kits for all major brands including Schlage and Kwikset, rekey every lock you specify to the new key, and label your new keys clearly before we go.
Keyed Alike
Signs you need it
Your front door, back door, and garage door each need a separate key, and you’re tired of carrying a ring of brass everywhere you go.
What it costs in Cassopolis
Keying multiple locks alike in Cassopolis is part of a standard rekey service at $15 to $25 per lock beyond the service-call fee, so a three-door house usually totals well under $200.
How we do it
We pin every lock to the same key code if your hardware allows it, so one key operates all your exterior doors, then we verify each cylinder before we leave.
What Rekey Locks Costs in Cassopolis
| Item | Typical range in Cassopolis |
|---|---|
| Service call (trip fee) | $50 – $75 |
| Rekey per lock (labor only) | $15 – $25 |
| Rekey per lock (parts included) | $20 – $35 |
| Most common total (3 locks) | $110 – $170 |
Those are honest Cassopolis ranges, not teaser prices. The final number depends on your hardware, how many locks you want rekeyed, and whether anything needs repair along the way, like a corroded lake-cottage cylinder or a misaligned strike plate. We quote the full price on the phone before anyone is dispatched, and there’s no call-out surcharge added on arrival.
How long does a rekey take in Cassopolis?
Most rekey jobs take 20 to 40 minutes for the first lock and 10 to 15 minutes per additional lock. Older mortise locks on Broadway buildings can take longer if the cylinder hasn’t been serviced in decades.
Is rekeying cheaper than replacing locks in Cassopolis?
Yes. A new quality deadbolt runs $40 to $80 before installation, while a rekey is $15 to $25 per lock plus the trip. For most Cassopolis homes with three or four exterior doors, rekeying saves $150 or more. Call (855) 341-7491 for an exact quote.
Brands We Service in Cassopolis
We work on Yale and Baldwin hardware on the older Cassopolis homes, Sargent on commercial doors near the courthouse, and Mul-T-Lock restricted systems for businesses that need strict key control. We stock common pins, cylinders, and parts for all of them, so most jobs finish same day. See our brands for the full list.
Pricing for Locksmith in Cassopolis, MI
| Service | Typical range in Cassopolis |
|---|---|
| Rekey per lock (labor only) | $15 – $25 |
| Rekey per lock (parts included) | $20 – $35 |
| Service call (trip fee) | $50 – $75 |
| Lock rekey (complete, per lock on-site) | $65 – $120 |
| Rekey service (trip + first lock + per additional) | $75 – $120 + $15 – $25 |
| Keyed alike (per lock beyond service fee) | $15 – $25 |
Two things push pricing up in Cassopolis more than elsewhere. First, the age and condition of the hardware: a sixty-year-old mortise body on a Broadway storefront or a rust-caked cottage cylinder takes more time and sometimes more replacement parts than a clean modern deadbolt. Second, winter and early spring calls often require freeing frozen or swollen mechanisms before the actual job can start. Whatever the situation, you get the full price on the phone first, and that’s the price on the invoice. No surprise fees.
Neighborhoods We Serve in Cassopolis
We cover all of Cassopolis, 49031, from the courthouse square and Broadway storefronts in the village center to the seasonal cottage roads around Diamond Lake and Eagle Lake, plus the surrounding township roads. Response time to most addresses in the village is 20 to 30 minutes; lake-area homes are typically 30 to 45 minutes from our keyshop.
- Downtown Cassopolis / Courthouse Square
- Broadway commercial district
- Diamond Lake area
- Eagle Lake area
- Stone Lake and surrounding township roads
Service Area – Cities Near Cassopolis
Beyond Cassopolis, we regularly serve the communities nearby in Cass, Van Buren, and St. Joseph counties. If you’re in Dowagiac, MI and need a rekey, Marcellus, MI with a cottage lock that’s failed, Decatur, MI for an emergency lockout, or Three Rivers, MI for commercial lock work, the same team covers your area. Call (855) 341-7491 and we’ll tell you exactly when we can be there.
Serving Cassopolis, MI — Our Local Coverage Area
We’re based in the Cassopolis 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 Locksmith in Cassopolis
Most lake-area calls around Diamond Lake and Eagle Lake are 30 to 45 minutes from our keyshop, depending on road conditions in winter. Village calls in Cassopolis are usually 20 to 30 minutes. When you call, we’ll give you a straight arrival window before anyone is dispatched.
No permit is required for rekeying locks on residential or commercial property in Cassopolis. If you’re a landlord rekeying a rental between tenants, the rekey itself is straightforward, though we recommend documenting it for your records.
Yes, and we recommend it every spring or at the start of each rental season. Seasonal cottages around Diamond and Eagle lakes change hands with keys, and freeze-thaw cycles can damage weak cylinders over winter. We’ll rekey and test everything before your first weekend up.
If you need a locksmith in Cassopolis who can handle both a 19th-century mortise lock on Broadway and a corroded cottage deadbolt at the lake, call Reliance Lock & Key at (855) 341-7491. We’ll give you a free estimate, an honest answer, and a price that matches the invoice.
What happens when you call
- 1A real person answersNo phone trees — talk to a local locksmith pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Cassopolis Customers Say
"Rekey was done properly. One of the keys he cut was slightly stiff in the back door and I had to call him to swap it, which he did without a fuss."
— Laura Rhodes"Commercial job, panic bar and a master key system for a small office. Clean install and clear documentation of which key opens what."
— Roger Novak"Told me over the phone that what I needed was a five dollar part from the hardware store, not a locksmith. I called him back a month later for real work because of that."
— Rosa Herrera