Main Line Locksmith: Veteran-Owned, Insured and Based in Devon, PA
MLine Locksmith comes to you for lockouts, lock changes, rekeying, smart locks and car keys across Chester and Delaware Counties and nearby Main Line towns. We’re open 7 days a week, 7 AM to 11 PM, holidays included.
We give you the price after we look at the job, before any work starts.
★★★★★5.0 on Google · 68 reviews
Veteran-Owned & Operated
Insured
Background-Checked Technicians
1-Year Warranty on Parts & Labor
Serving the Main Line Since 2023
How we work
You Get the Price Before Any Work Starts
A lock, a door and a key can look the same on the phone and be very different in person. That’s why we don’t quote jobs over the phone. We come to you, look at the hardware, tell you what we find and give you the price. You decide whether to go ahead.
1
Call or message us
Tell us what happened and where you are. We give you an estimate of when we can get there. Arrival depends on traffic and technician availability.
2
We inspect on site
A background-checked technician looks at the lock, the door and the key.
3
You get the price
We explain your options, including repair or rekeying when that’s enough, and give you the price before we start.
4
We work after you say yes
Nothing starts until you approve it.
If a lock can be repaired or rekeyed, we’ll tell you instead of pushing a replacement.
Services
Locksmith Services for Homes, Businesses and Vehicles on the Main Line
Residential Locksmith
Houses, townhomes and apartments in Devon, Wayne, Paoli, Berwyn and nearby towns.
Home lockouts. Non-destructive methods first whenever the situation allows.
Rekeying. New keys work, old keys stop, and you keep the hardware.
Lock changes and deadbolts.
Smart and keypad locks. We check the door fits the lock first.
Real jobs, real doors. We add new ones as we finish them.
Before
After
Devon · September 2026
A door with no lock at a car dealership
A commercial door had no lock. We installed a deadbolt so the staff can lock and unlock it.
Commercial · Lock installation
Bryn Mawr · October 2026
Schlage keypad upgrade
We upgraded the locks on a home entry door to a Schlage keypad lock.
Residential · Lock change
West Chester · October 2026
Push bar door, lock change
We changed the lock on a commercial glass door fitted with a push bar (exit device).
Commercial · Lock change
Why MLine
Why Main Line Customers Call MLine Locksmith
Veteran-owned and operated
A local business with an office on Lancaster Avenue in Devon.
Insured and background-checked
The person at your door has been checked, and the work is insured.
1-year warranty
Every job is backed by a 1-year warranty on parts and labor.
Straight answers
Repair, rekey or replace: we tell you what makes sense, then you decide.
Reviews
Rated 5.0 on Google by Local Customers
Posted on Google
Dwayne Johnson
Trustindex verifies that the original source of the review is Google.
I appreciate it everything Andrew has done. He is a scholar. Work was done sufficient quick with no problems and he explained everything thoroughly. Thanks a lot Andrew.
Posted on Google
Susan
Trustindex verifies that the original source of the review is Google.
Steve was fantastc! He showed us options we weren’t even aware of that were perfect for our home needs. He was quick and efficient and I highly recommend his locksmith services. And he was just a super nice guy 😃
Posted on Google
Bill Mccausland
Trustindex verifies that the original source of the review is Google.
Expensive
Posted on Google
FoxFire GLO
Trustindex verifies that the original source of the review is Google.
Steven did a great job installing a new lock and troubleshooting a lock issue. He is very knowledgeable and professional. I will definitely use MLine Locksmith in the future for any locksmith jobs.
Posted on Google
Claudia Dustin
Trustindex verifies that the original source of the review is Google.
Amazing service! Moved into a home with a broken keypad door knob. Steven came out and installed a new system and rekeyed all other doors in the house so we only have one key for all the doors. Great service. He called before coming over, was polite, personable and respectful, and made my life simpler and safer. 5 stars! Thank you!
Posted on Google
L Moreen
Trustindex verifies that the original source of the review is Google.
Sam is the best! He was helpful, responsive, and highly skilled. Would recommend in a flash!
Posted on Google
Dirk Holden
Trustindex verifies that the original source of the review is Google.
Russell provided friendly and exceptional skill in replacing our Deadlock. Would definitely hire them again.
Posted on Google
Marie Birkett
Trustindex verifies that the original source of the review is Google.
Great service . Phoned in the morning and was given a call back within 10 mins with a scheduled time . Andrew arrived ahead of schedule and was finished fast with no clean up afterwards and even managed a quick tune up on another door when asked to. Great company and would recommend!
Posted on Google
Julia Hein
Trustindex verifies that the original source of the review is Google.
Great service! Sam was a wonderful technician and got here very fast and worked quick!
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We don’t give prices over the phone, but you should know what moves the number:
Repair, rekey or replace. Rekeying a lock in good shape usually costs less than a new lock.
The lock itself. Standard deadbolts, high-security cylinders, smart locks and exit devices are different jobs.
The door and the frame. A misaligned door can be the real problem.
Vehicle and key type. Make, year, and transponder key or fob.
Parts. You'll see what's needed and why before we install it.
How to Choose a Locksmith You Can Trust
Before you hire any locksmith, us included, ask:
What’s your business name and where are you based? Ours is 237 W Lancaster Ave, Suite 219, Devon.
Will you give me the price before you start?
Do you try to open the door without damaging it?
What warranty comes with the work? Ours is 1 year on parts and labor.
Are your technicians vetted and the business insured? Ours are background-checked, and we’re insured.
What to Tell Us When You Call
It helps us plan the job and give you a better estimate of our arrival.
Where you are: address and town, and whether it's a house, store or vehicle.
What happened: locked out, lost key, broken key, stuck lock, or a new lock.
For a door: deadbolt, knob, lever, keypad or smart lock, if you know.
For a car: make, model, year, and type of key.
Anyone or anything inside (child, pet, running engine): tell us first.
Service area
Locksmith Service Across the Main Line
We’re based in Devon and work throughout Chester County and Delaware County, plus nearby Montgomery County towns such as King of Prussia. Drive times change with traffic, so when you call we’ll give you an estimate of when we can arrive.
Address: 237 W Lancaster Ave Suite 219, Devon, PA 19333 Hours: Monday to Sunday, 7:00 AM – 11:00 PM Phone:(267) 609-9459
FAQ
Main Line Locksmith FAQs
How much does a locksmith cost on the Main Line?
It depends on the lock, the door and what the job needs, so we don’t quote prices over the phone. One technician comes to you, looks at the job, explains your options and gives you the price before any work starts. You decide whether to go ahead.
Are you open 24 hours?
No. We’re open every day from 7 AM to 11 PM, holidays included, and we take emergency lockout calls during those hours. If you’re locked out outside those hours, we can’t promise a visit. We’d rather tell you that than leave you waiting.
How fast can you get to me?
We’re based in Devon, close to most of the Main Line. Arrival depends on traffic and which technician is free, so we give you an estimate when you call instead of a promise we might not keep.
Will you damage my door or lock to get me in?
We try non-destructive methods first whenever the situation allows. If a lock does need to be drilled or replaced, we tell you before we do it and give you the price.
Should I rekey my locks or replace them?
If the lock is in good shape, rekeying is often enough: the old keys stop working and you keep the hardware. If the lock is worn, damaged or you want something better, such as a smart lock, replacing it makes more sense. We look at it in person and tell you which one fits.
I just moved in. What should I do about the locks?
Old keys may still be out there with previous owners, tenants, contractors or neighbors. Rekeying or changing the locks on the exterior doors is the usual first step. We can do it in the same visit.
Can you make a car key or key fob?
Yes, for most makes. We come to your car for lost or broken keys, transponder keys and key fobs. Call us with the make, model and year so we know what to expect.
Do you work on business doors?
Yes. We do lock changes, rekeying after staff or tenant changes, office lockouts, push bars (exit devices), access control and master key systems.
Are you insured, and are your technicians checked?
Yes. MLine Locksmith is insured and our technicians are background-checked.
What does the 1-year warranty cover?
Parts and labor on the work we do.
How do I know a locksmith is legit?
Check four things: a real local address, a business name given when they answer the phone, a price before work starts, and a warranty you can repeat back. We work out of 237 W Lancaster Ave, Suite 219 in Devon, we give the price after we inspect and before we begin, and our work carries a 1-year warranty on parts and labor.
Which towns do you serve?
Chester County, Delaware County and nearby Main Line towns, including Devon, Wayne, Paoli, Berwyn, Villanova, Bryn Mawr, Radnor, Newtown Square and King of Prussia. See all service areas for the full list.
Need a Locksmith on the Main Line Today?
Call or message us, tell us what’s going on, and we’ll explain what happens next. We’re open every day from 7 AM to 11 PM.
