Residential Locksmith Services in Castroville & the Castroville area
When you're standing on your porch in Castroville with the door shut behind you and no way in, you don't need a lecture — you need someone dependable on the way. John Locksmiths is a 24/7 mobile home locksmith serving Castroville and the surrounding Medina County area, from the historic streets near Houston Square and the Landmark Inn to the newer neighborhoods off US-90 and the homes stretching toward Mico and LaCoste. We come to you with a fully equipped vehicle, trained hands, and the tools to handle everything from a simple lockout to a full mortise lock rebuild.
Open 24 hours, 7 days a week · Licensed, bonded & insured

This page walks through the residential work we do every day: damage-free entry when you're locked out of the house, lock rekeying and lock changes, deadbolt and high-security upgrades, smart lock installation, and security help for anyone moving into a new place. Whatever the situation, our technicians are experienced, insured, and focused on getting the job done cleanly the first time. Call (830) 335-5188 any hour, day or night, and a real person will help.
What we do
Mortise Lock Specialists
We repair and rebuild the mortise locks common in Castroville's older Alsatian-era homes, sourcing period-correct hardware when possible.
Same-Day Rekeying
After a move or lost key we rekey every door in your home the same day so old keys no longer work.
Door Knob & Deadbolt Upgrades
We swap worn door knob locks for graded deadbolts that hold up to the local climate and improve break-in resistance.
Upfront Flat Pricing
You get the full cost before we touch a lock, so there are no surprise per-hour add-ons at the door.
Brands We Service
We install, repair and rekey all major lock brands — from everyday deadbolts to high-security cylinders.
Don’t see your brand? We service virtually every make — just call.
Reviews
What Castroville & the Castroville area Customers Say
“I have a 2008 535i and had issues with the DME. I did some research and found this place. I have a spare car in my shop for parts and brought both DME and asked for a clone from one to the other. Withing 2hours it was ready. Very professional. They will work in any European car. Will highly recommend this place.”
Service area
Areas we cover around Castroville
Based in Castroville, we reach the Castroville area fast — 24/7. Don’t see your street? Call us, we very likely cover it.
(830) 335-5188Frequently asked questions
What do I do if I have locked myself out of my house?
First, stay calm and check every door and ground-floor window that may be unlocked, and look in your usual spots for a spare key with a neighbor or in a lockbox. Avoid prying at windows or forcing the door, since that often causes damage that costs more to repair than the lockout itself. When you're ready, call (830) 335-5188 and our mobile technician will come to your Castroville location and get you back inside safely.
How much is a locksmith if I'm locked out of my house?
The price of a home lockout service depends on the type of lock, the time of day, how far we travel to reach you, and whether any parts are needed. Instead of quoting a vague figure, we assess your situation over the phone and confirm an exact up-front price before we start any work. That way there are no surprises when the door opens.
How to unlock your house door if you got locked out?
If a window or secondary door is open, that's the safest way back in, and checking with family or a neighbor for a spare key is always worth a minute. For a locked exterior door, the reliable option is a trained technician who uses professional tools designed to open the door without damaging it. We do not recommend DIY forced-entry attempts, which frequently ruin the lock, the door, or the frame.
Who to call if locked out of house?
Call a professional mobile locksmith who serves your area and answers around the clock. John Locksmiths covers Castroville and the surrounding communities 24/7, and our number is (830) 335-5188. We'll verify you're authorized to enter, then use damage-free methods wherever possible to get you home.
Do locksmiths need a license in Texas?
Locksmith regulation in Texas has shifted over the years, so requirements have changed and continue to evolve. What matters most for your safety is choosing a team that is trained, experienced, and insured, and that verifies ownership before opening any door. Our technicians meet those standards and treat your property with care on every call.
How much does a local locksmith charge, and what is a call out fee?
A locksmith call out fee covers the cost of dispatching a technician and their tools to your property, and the total also reflects the job itself — the lock type, parts, and time involved. Rather than charging a mystery hourly rate, we give you one clear, agreed price before work begins. You'll always know the full cost up front, whether it's a lockout, a lock change, or a rekey.
What is the crime rate in Castroville, Texas?
Castroville is a small, close-knit community and is generally considered a safe place to live, but no town is immune to break-ins or opportunistic theft. Strong deadbolts, rekeyed locks after a move, and modern keyless hardware all reduce your risk regardless of local statistics. We're happy to walk your home and point out the weak spots that are easiest to fix.
Can you rekey my locks instead of replacing them?
In most cases, yes. If your existing locks are in good working condition, rekeying changes the internal pins so old keys no longer work — a faster, less costly route than buying all-new hardware. We'll tell you honestly when rekeying is the smart move and when a full lock change makes more sense for security or wear reasons.