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Lock Upgrades
Trusted, non-destructive lock upgrades protecting homes and businesses across Essex.
MLA-qualified locksmiths with over 13 years of hands-on experience upgrading locking systems.
24hr Emergency Call Out!
07782 775791
High-Quality Lock Upgrades
Fast, Secure, Lock Upgrade Solutions Near You
We provide expert lock upgrade services and advice across the Essex region for homes and businesses.
Whether your current locks are damaged, sticking, or simply outdated, we ensure your property remains a haven with high-quality, modern security solutions.
Our specialised lock upgrade services include:
- High-Security Cylinder Locks: We specialise in ABS Elite high-security locks, designed to resist snapping, picking, and drilling.
- Mortice & Deadlocks: Ideal for timber doors, we install insurance-approved deadlocks (BS3621) to meet the highest safety standards.
- uPVC Door & Window Upgrades: We repair and upgrade the complex multi-point locking mechanisms found in modern uPVC and composite doors.
- Additional Property Security: We don’t just stop at the front door. We provide upgrades for garages, sheds, gates, and internal & external doors to ensure your entire perimeter is secure.
- Residential Locksmith ServicesLock repair & replacements24/7 Home LockoutsBroken Key RemovalLock UpgradesHome SecurityKey Cutting
Geraldine M
18:06 27 Feb 26
Fantastic. Came at such short notice and sorted us out super quickly and a very reasonable price. A pleasure to meet too. Thank you!
James Briggs
13:37 25 Feb 26
Aaron turned bang on time, had a new set of 🔑 🎹, and programmed keys all inu der 30mins , very polite and friendly, van all running perfect, would highly recommend this man
Tom Shepherd
22:13 10 Feb 26
Called Aaron at 20.00 on a Saturday as my Discovery decided to lock it’s self with keys inside, ( my own fault but it never happened before in 3 years working there) , booked him Sunday as the entry restrictions of the location of car was in secure port. He suggested 08.00 which was perfect for me too!
He arrived, and was really professional, obviously likes locksmithing. Great to deal with, and I was so happy to get back into my car so I could travel back to Dorset.
Thank you very much for coming out on a Sunday morning,
He arrived, and was really professional, obviously likes locksmithing. Great to deal with, and I was so happy to get back into my car so I could travel back to Dorset.
Thank you very much for coming out on a Sunday morning,
connor seymour
10:10 04 Feb 26
Amazing service. The whole process of replacing my lost car keys was smooth, affordable, and stress-free. Highly recommend to anyone needing key programming or car locksmith services . Really knowledgeable and friendly technician. Thank you
Emma Bassi
17:09 11 Jan 26
Great service. Called out on a Sunday and arrived within 15 minutes. Would definitely recommend. Thanks
Sarah Cronin
18:09 28 Dec 25
So grateful for Aaron's expertise. From the moment we called in a panic to the completion of the job, we felt reassured. Highly recommend and would not hesitate to use again. Thank you!
Lucy Prewer
11:22 15 Dec 25
Quick, lovely friendly service. Very reasonably priced. Definitely recommend, thanks Aaron
Kelly Wickers
17:40 05 Dec 25
Had Aaron booked in today as my
Immobiliser had gone on my car. Arrived promptly and sorted the issue very quickly. Would recommend.
Immobiliser had gone on my car. Arrived promptly and sorted the issue very quickly. Would recommend.
Sundeep Dewal
12:50 03 Dec 25
Very reasonable. Sorted my Audi lost key fob out in 30mins. Jay was awesome to deal with. Defo be back. Cheers.
Corrina Forbes
14:29 27 Nov 25
Really happy with the service, came at a time that suited me, was done quicker than I expected, will definitely use Arron again, thank you
CMS cladding & Roofing
16:46 23 Nov 25
Excellent in all ways, turned up same day on the exact time given, very professional. Highly recommended!
Rosie Cunningham
11:17 18 Nov 25
Excellent service. Both our car keys stopped working (tried changing the batteries multiple times with no luck) and Aaron came out to sort it quickly. Very friendly and much cheaper than Timpsons would have been.
Bobby Moore
17:15 14 Nov 25
Couldn’t believe how fast he arrived — genuinely came out to me so quickly that I barely had time to panic. I called Locks on Sea Locksmiths expecting to be stuck for ages, but he was at my door within 20 minutes, calm, friendly, and ready to sort everything out.
From start to finish, the service was honestly faultless. He got my door open with absolutely no damage, which I was so relieved about. You can tell he knows exactly what he’s doing — proper professional, efficient, and clearly experienced.
The price was great, especially considering how fast and smooth the whole thing was. No messing around, no hidden charges, just solid, honest work. And on top of that, he was genuinely a good guy to deal with — polite, easy to talk to, and even smelt nice too 😂 Little things like that actually make the experience so much better when you’re stressed out.
Honestly, he was a saviour in a moment when I really needed someone reliable. If you ever end up locked out or in any kind of locksmith situation, I’d recommend Locks on Sea Locksmiths without hesitation. Top-tier service from a top-tier guy.
From start to finish, the service was honestly faultless. He got my door open with absolutely no damage, which I was so relieved about. You can tell he knows exactly what he’s doing — proper professional, efficient, and clearly experienced.
The price was great, especially considering how fast and smooth the whole thing was. No messing around, no hidden charges, just solid, honest work. And on top of that, he was genuinely a good guy to deal with — polite, easy to talk to, and even smelt nice too 😂 Little things like that actually make the experience so much better when you’re stressed out.
Honestly, he was a saviour in a moment when I really needed someone reliable. If you ever end up locked out or in any kind of locksmith situation, I’d recommend Locks on Sea Locksmiths without hesitation. Top-tier service from a top-tier guy.
D Ingram
13:40 07 Nov 25
Aaron was excellent! Really helpful before he came over and was able to come the same week.
Sorted our lock, replaced a new locker and alignment.
Excellent service couldn’t be more happy!
Sorted our lock, replaced a new locker and alignment.
Excellent service couldn’t be more happy!
Dev Simms
18:41 05 Nov 25
By far the best company I’ve used. When I rang and told them the situation I was in, they were very quick and efficient. Very professional in there job. They came out quite late in the evening too and still determined to get the job done. Highly recommend
Gareth James
11:03 01 Nov 25
Excellent service. Keys ordered and came to the house within 3 days and sorted new car and van keys. Will definitely use again
L Dobbo
17:37 14 Oct 25
Great service from Aaron today! I lost my car key - Aaron came out and quickly rescued me. He replaced the key and re-coded it. Very professional, friendly and reasonably priced too.
Ben Dubois
12:04 07 Oct 25
Got me out of tight spot when my car key was broken. Fast efficient and friendly. Thanks a lot!
Adam
16:19 29 Sep 25
Aaron was an absolute star got to us in quick time about 20-30mins from when we called and had the lock sorted and us back in our flat in minutes of him arrivign and looking at the lock,would highly recommend his services,also very amicable and friendly customer service will definitely use again in future if have any lock problems
natalie hooper
08:40 26 Sep 25
Called last night, was at my house by 9am the next day! Great service, very fast and efficient, thankyou so much!
Lydia Herve
10:50 25 Sep 25
Unbelievable service! Little one locked himself in the car and Aaron was there within 15 mins and we were back in the car within 10. Couldn’t be happier and really great value!
Sophie Mitchell
18:31 18 Sep 25
Fab service from Aaron today - turned up when promised to cut some spare keys. Professional, polite and reasonably priced. I can't recommend highly enough!
Craig Parker
11:20 03 Sep 25
Great friendly service, really quick to respond and sort out all issues we had we locks. Thanks very much for all your help.
Ellis Rosenthal
12:12 30 Aug 25
Friendly staff on the phone and quick response on getting to the address. Entered the property without damage very quickly. Fantastic service that I'll be using again.
Chloe Norton
15:24 17 Aug 25
Aaron was very professional and provided a great service. He came out to fix my door lock very quickly at the weekend even though it wasn't an emergency. Highly recommend!
Katherine Elcock
20:14 15 Aug 25
Was very efficient and kind and polite quick response. Overall very good service. Happy customer.
Beverley Elliott
12:06 06 Aug 25
Great service, quick to respond to my request for new locks on kitchen windows. All completed and really happy with the result and competitive price. Would definitely recommend
Steve Carr
13:09 05 Aug 25
Thank you for such a great service and support.
Helpful, friendly, fast and very fair. Full stars!
Helpful, friendly, fast and very fair. Full stars!
Joanne Bartlett
20:44 01 Aug 25
Brilliant quick efficient service by Aaron Came round straightaway and fixed my lock thanks again would definitely recommend.
Chantelle Liversidge
20:49 25 Jul 25
Amazing service, came out to me and fixed in under 30mins incredible life saver
Clare Fuller
13:16 25 Jul 25
Very pleased with the work carried out. A very reliable locksmith. Arrived on time and cracked on with the job straight away.
Liam Mayo
12:39 25 Jul 25
amazing service so quick
Lucy Bonham
11:01 24 Jul 25
I have just moved into a rented property snd locked myself out of my house. I called Aaron and he came very quickly and fixed the lock and also fixed my door as well! Could not recommend him enough!!!
Raj
10:16 21 Jul 25
Quick to open the main door.
Christine Chaplin
17:55 18 Jul 25
Great , very quick service , excellent job , thankyou Aaron.
sarah nicholls
09:55 18 Jul 25
Excellent service , locked car keys in car was at mine in 20 min , car opened in 5 min. Very friendly . Highly recommend
Hypnotherapy Essex Ltd
11:29 16 Jul 25
Great service, great price, really impressed, saved me a fortune & really knowledgeable and fair, highly recommend.
Jason Young
09:09 14 Jul 25
Speedy service will recommend Aaron no problem at all!
Stuart Bell
12:37 03 Jul 25
Great service. 2 locks replaced and was able to do same day for reasonable price, explaining the locks and what was needed.
Melanie Schwartz
13:16 02 Jul 25
Great service. Aaron is super quick, efficient and friendly. Great service 😁
Andrea Norton
19:05 15 Jun 25
I was very impressed with the service I received from locks on sea. Aaron came to look at my windows that had been stuck fast for several years - he measured up and quoted for me the same day. As soon as the parts that he needed were in he came and fixed my windows, it’s so nice to be able to open them again especially now the weather is so hot. Thanks locks on sea 👍🏻
Careesa Pope
18:06 12 Jun 25
Great service done by Aaron, fast response with very reasonable prices. Changed a lock and got me back inside when i was desperate. Thankyou so much, would highly recommend 👍🏼
Daniel Tibbs
13:20 10 Jun 25
Needed a couple of new keys cutting, called locks on sea and they was able to come to my address within the hour to cut a new set all done on the van no need to go to a shop great service would recommend A*
Lock Upgrades You Can trust
We help local homeowners replace and improve faulty or "aged-out" hardware with reliable, 24/7 protection. Our goal is to provide a seamless upgrade that works every time you turn the key.
Non-destructive Methods
We aim to upgrade your locks without causing any unnecessary damage to your doors or frames, saving you extra money on repair costs. Trust the professionals to get the job done right.
Home Security Assessment
Not sure where your home is vulnerable? We offer a FREE home security assessment to identify weak points and create a tailored lock upgrade package specifically for your property.
Local, Insured & Qualified
As a trusted Southend-on-Sea locksmith, we are fully qualified and insured, offering a fast, friendly service that national call centres can't match. Quality service guaranteed.
onsite
key cutting services
Trusted, Qualified, and Professional Key Cutting
To complement your new lock upgrade, we provide on-site key cutting using high-grade blanks for precise, durable results.
Our mobile workshop allows us to complete the entire service on-site to ensure new keys work perfectly first time, saving you time, hassle and money.
24hr Call Out
07782 775791
Why Choose Us
Your Trusted, MLA-qualified Locksmith Professionals
With over 13 years of hands-on experience, Locks on Sea is a family-run locksmith service known for reliability, speed, and care. We’re fully licensed, insured, and available 24/7 to handle lock upgrades, lockouts, repairs, and security checks across homes, businesses, and vehicles across Essex.
Our focus is fast response times, fair pricing, and quality workmanship every single time.
- 13+ Year Experience
- Open 24 hours a Day
- Super Fast Arrvial
- Competetive Pricing
- Locally Owned & Operated
- Accepting Credit Cards
- Quick & Honest Service
- Satisfaction Guaranteed
Locations Served
Proudly serving Southend, Leigh-on-Sea, Rochford, and surrounding areas with rapid response times.
We’re fully licensed
Every locksmith is MLA certified, insured, and trained to meet the highest UK security standards.
Top Quallity products
Every locksmith is insured, and trained to use the best industry grade tools and equipment.
24/7 Support
Real people, real locksmiths always ready when you need us, day or night.
Need a lock Upgrade?
Fast. Local. Available 24/7 across Essex.
24hr Call Out
07782 775791Trusted by Clients Across Essex
We’ve helped thousands of customers in Southend, Leigh-on-Sea, and beyond with 5-star reviews and fast, honest service.
Have an urgent lock issue or need advice? Fill out the form and we’ll get back to you right away or call us now for immediate assistance.
A+
Proven Reviews
5.0
Google Reviews
What our clients say!
Geraldine M18:06 27 Feb 26Fantastic. Came at such short notice and sorted us out super quickly and a very reasonable price. A pleasure to meet too. Thank you!James Briggs13:37 25 Feb 26Aaron turned bang on time, had a new set of 🔑 🎹, and programmed keys all inu der 30mins , very polite and friendly, van all running perfect, would highly recommend this manTom Shepherd22:13 10 Feb 26Called Aaron at 20.00 on a Saturday as my Discovery decided to lock it’s self with keys inside, ( my own fault but it never happened before in 3 years working there) , booked him Sunday as the entry restrictions of the location of car was in secure port. He suggested 08.00 which was perfect for me too!
He arrived, and was really professional, obviously likes locksmithing. Great to deal with, and I was so happy to get back into my car so I could travel back to Dorset.
Thank you very much for coming out on a Sunday morning,connor seymour10:10 04 Feb 26Amazing service. The whole process of replacing my lost car keys was smooth, affordable, and stress-free. Highly recommend to anyone needing key programming or car locksmith services . Really knowledgeable and friendly technician. Thank youEmma Bassi17:09 11 Jan 26Great service. Called out on a Sunday and arrived within 15 minutes. Would definitely recommend. ThanksSarah Cronin18:09 28 Dec 25So grateful for Aaron's expertise. From the moment we called in a panic to the completion of the job, we felt reassured. Highly recommend and would not hesitate to use again. Thank you!Lucy Prewer11:22 15 Dec 25Quick, lovely friendly service. Very reasonably priced. Definitely recommend, thanks AaronKelly Wickers17:40 05 Dec 25Had Aaron booked in today as my
Immobiliser had gone on my car. Arrived promptly and sorted the issue very quickly. Would recommend.Sundeep Dewal12:50 03 Dec 25Very reasonable. Sorted my Audi lost key fob out in 30mins. Jay was awesome to deal with. Defo be back. Cheers.Corrina Forbes14:29 27 Nov 25Really happy with the service, came at a time that suited me, was done quicker than I expected, will definitely use Arron again, thank youCMS cladding & Roofing16:46 23 Nov 25Excellent in all ways, turned up same day on the exact time given, very professional. Highly recommended!Rosie Cunningham11:17 18 Nov 25Excellent service. Both our car keys stopped working (tried changing the batteries multiple times with no luck) and Aaron came out to sort it quickly. Very friendly and much cheaper than Timpsons would have been.Bobby Moore17:15 14 Nov 25Couldn’t believe how fast he arrived — genuinely came out to me so quickly that I barely had time to panic. I called Locks on Sea Locksmiths expecting to be stuck for ages, but he was at my door within 20 minutes, calm, friendly, and ready to sort everything out.
From start to finish, the service was honestly faultless. He got my door open with absolutely no damage, which I was so relieved about. You can tell he knows exactly what he’s doing — proper professional, efficient, and clearly experienced.
The price was great, especially considering how fast and smooth the whole thing was. No messing around, no hidden charges, just solid, honest work. And on top of that, he was genuinely a good guy to deal with — polite, easy to talk to, and even smelt nice too 😂 Little things like that actually make the experience so much better when you’re stressed out.
Honestly, he was a saviour in a moment when I really needed someone reliable. If you ever end up locked out or in any kind of locksmith situation, I’d recommend Locks on Sea Locksmiths without hesitation. Top-tier service from a top-tier guy.D Ingram13:40 07 Nov 25Aaron was excellent! Really helpful before he came over and was able to come the same week.
Sorted our lock, replaced a new locker and alignment.
Excellent service couldn’t be more happy!Dev Simms18:41 05 Nov 25By far the best company I’ve used. When I rang and told them the situation I was in, they were very quick and efficient. Very professional in there job. They came out quite late in the evening too and still determined to get the job done. Highly recommendGareth James11:03 01 Nov 25Excellent service. Keys ordered and came to the house within 3 days and sorted new car and van keys. Will definitely use againL Dobbo17:37 14 Oct 25Great service from Aaron today! I lost my car key - Aaron came out and quickly rescued me. He replaced the key and re-coded it. Very professional, friendly and reasonably priced too.Ben Dubois12:04 07 Oct 25Got me out of tight spot when my car key was broken. Fast efficient and friendly. Thanks a lot!Adam16:19 29 Sep 25Aaron was an absolute star got to us in quick time about 20-30mins from when we called and had the lock sorted and us back in our flat in minutes of him arrivign and looking at the lock,would highly recommend his services,also very amicable and friendly customer service will definitely use again in future if have any lock problemsnatalie hooper08:40 26 Sep 25Called last night, was at my house by 9am the next day! Great service, very fast and efficient, thankyou so much!Lydia Herve10:50 25 Sep 25Unbelievable service! Little one locked himself in the car and Aaron was there within 15 mins and we were back in the car within 10. Couldn’t be happier and really great value!Sophie Mitchell18:31 18 Sep 25Fab service from Aaron today - turned up when promised to cut some spare keys. Professional, polite and reasonably priced. I can't recommend highly enough!Craig Parker11:20 03 Sep 25Great friendly service, really quick to respond and sort out all issues we had we locks. Thanks very much for all your help.Ellis Rosenthal12:12 30 Aug 25Friendly staff on the phone and quick response on getting to the address. Entered the property without damage very quickly. Fantastic service that I'll be using again.Chloe Norton15:24 17 Aug 25Aaron was very professional and provided a great service. He came out to fix my door lock very quickly at the weekend even though it wasn't an emergency. Highly recommend!Katherine Elcock20:14 15 Aug 25Was very efficient and kind and polite quick response. Overall very good service. Happy customer.Beverley Elliott12:06 06 Aug 25Great service, quick to respond to my request for new locks on kitchen windows. All completed and really happy with the result and competitive price. Would definitely recommendSteve Carr13:09 05 Aug 25Thank you for such a great service and support.
Helpful, friendly, fast and very fair. Full stars!Joanne Bartlett20:44 01 Aug 25Brilliant quick efficient service by Aaron Came round straightaway and fixed my lock thanks again would definitely recommend.Chantelle Liversidge20:49 25 Jul 25Amazing service, came out to me and fixed in under 30mins incredible life saverClare Fuller13:16 25 Jul 25Very pleased with the work carried out. A very reliable locksmith. Arrived on time and cracked on with the job straight away.Liam Mayo12:39 25 Jul 25amazing service so quickLucy Bonham11:01 24 Jul 25I have just moved into a rented property snd locked myself out of my house. I called Aaron and he came very quickly and fixed the lock and also fixed my door as well! Could not recommend him enough!!!Raj10:16 21 Jul 25Quick to open the main door.Christine Chaplin17:55 18 Jul 25Great , very quick service , excellent job , thankyou Aaron.sarah nicholls09:55 18 Jul 25Excellent service , locked car keys in car was at mine in 20 min , car opened in 5 min. Very friendly . Highly recommendHypnotherapy Essex Ltd11:29 16 Jul 25Great service, great price, really impressed, saved me a fortune & really knowledgeable and fair, highly recommend.Jason Young09:09 14 Jul 25Speedy service will recommend Aaron no problem at all!Stuart Bell12:37 03 Jul 25Great service. 2 locks replaced and was able to do same day for reasonable price, explaining the locks and what was needed.Melanie Schwartz13:16 02 Jul 25Great service. Aaron is super quick, efficient and friendly. Great service 😁Andrea Norton19:05 15 Jun 25I was very impressed with the service I received from locks on sea. Aaron came to look at my windows that had been stuck fast for several years - he measured up and quoted for me the same day. As soon as the parts that he needed were in he came and fixed my windows, it’s so nice to be able to open them again especially now the weather is so hot. Thanks locks on sea 👍🏻Careesa Pope18:06 12 Jun 25Great service done by Aaron, fast response with very reasonable prices. Changed a lock and got me back inside when i was desperate. Thankyou so much, would highly recommend 👍🏼Daniel Tibbs13:20 10 Jun 25Needed a couple of new keys cutting, called locks on sea and they was able to come to my address within the hour to cut a new set all done on the van no need to go to a shop great service would recommend A*
Lock Upgrades fAQ's
If you need some quick assistance, here are a few common industry queries we get asked a lot.
When should I consider changing my home locks?
We generally recommend an upgrade if your locks are more than 10 years old, showing signs of wear (such as sticking or difficulty turning), or if you have recently moved into a new home. A quick upgrade to modernised home security lock standards can help prevent the most common burglary methods used today.
Do you charge a callout fee for lock assessments?
No, we do not charge a call-out fee to visit your property. Whether you need an emergency repair or a planned upgrade, you only pay for the work we do and the parts we provide. We provide clear, upfront pricing so there are never any hidden surprises on your bill, for full transparency.
Can you upgrade locks for businesses as well as homes?
Absolutely. We specialise across homes and businesses, and we are fully qualified to handle commercial lock upgrades across Essex. We can install heavy-duty mortice locks, master-key systems, and high-traffic security solutions for offices, shops, and industrial units. If your business security feels outdated, we can provide a robust solution to protect you and your peace of mind.
Which brand of Lock supplies do you work with?
We only work with trusted, industry-accredited suppliers to ensure your security lasts. Our preferred brands include Yale, Chubb/Union, ERA, and ABS (Avocet). These manufacturers are known for their reliability and high-security certifications, ensuring your new locks perform perfectly 24/7.