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 Commercial Locksmith Across San Lorenzo
When a commercial lock fails in San Lorenzo, you need a locksmith who understands what this community is built from. Nearly all of San Lorenzo is one enormous tract: roughly 7,000 homes and their attendant outbuildings erected by the David D. Bohannon Organization starting in 1944. The door prep, strike dimensions, and lock hardware across whole streets repeat from lot to lot. Our Commercial Locksmith team works these mid-century door frames every week, so we can often diagnose a lock problem before we open the door. If you need a master key system, a mortise lock replacement, or a locked shop opened without damage, call (910) 714-4287 and you’ll get a live person, any hour.
Why Dunmore Locksmith Is San Lorenzo’s Preferred Commercial Locksmith Company
Dunmore Locksmith is the local face of Threshold Group, and we’ve worked under that umbrella since 2007. The name comes from old words for a great fort, a stronghold built to keep what’s inside safe. That’s the posture we take with every San Lorenzo job, whether it’s a storefront on Hesperian Boulevard or a detached workshop behind a house near Paseo Grande. We serve San Lorenzo from our Bay Area scheduling office, and our crews know this community block to block.
What sets us apart is the Threshold Standard. Every technician who arrives at your door is background-checked, identity-verified, and sent to you by name and photo before the visit. The person at your door wears a clean uniform and carries a photo ID badge. If someone shows up you were not told to expect, we cover that visit at no charge. Our written pricing arrives before any work begins, and every repair carries the 365-Day Done Right Promise: if a repair fails, we return at no cost for a full year.
Perry Osgood, who leads our San Lorenzo commercial work, has spent years mapping the quirks of Bohannon-era door prep across this tract. That familiarity is why a job that might take a visiting locksmith two visits can usually be handled in one. For a free estimate on any commercial locksmith service in San Lorenzo, call (910) 714-4287.
Master Key System in San Lorenzo
A Master Key System in San Lorenzo solves a problem this community has in spades: house, workshop, gate, and shed locks that have accumulated different keys over 70-plus years. Bohannon homes sit on generous lots, many with a detached garage or workshop behind the house and a utility gate on the side yard. Each of those locks was likely keyed separately at some point, which means nobody has a single key that opens everything. We build you one.
A typical master key system for a San Lorenzo property with a house door, a workshop door, and a gate padlock runs $180 – $380, depending on how many cylinders need rekeying or replacing and whether we’re keying higher-security cylinders. The work involves rekeying (changing the internal pins so old keys stop working) each lock to your new master key while retaining individual keys if you want them. Prices are delivered in writing before any work starts.
One Key for House, Workshop, and Gate
On a Bohannon-era property off Via Lucas with a detached workshop and a side-yard gate, we traced a commercial call where the shop’s mortise lock cylinder had seized from decades of marine-fog salt air. Old keys spun but nothing threw. We used non-destructive entry to avoid chewing the original mid-century door prep, replaced the mortise lock cylinder, and built a master key system that keyed the house, the workshop, and the gate padlock alike so the owner had one key in one visit instead of three. That’s the outcome we aim for on every San Lorenzo master key job.
Who Should Give Out Which Key
A well-designed master key system is also a key-control tool. You keep the master. A shop assistant gets a sub-master that opens the workshop and gate but not your house. A dog walker gets a key that opens the side gate only. We set the hierarchy to match how you actually use the property, and we stamp every key with a reference number you track. No key works on anything you did not approve.
Mortise Lock Replacement in San Lorenzo
Mortise Lock Replacement in San Lorenzo is one of our most common commercial jobs because so many of this community’s original doors still carry mid-century mortise cases that modern deadbolts simply will not fit into. The Bohannon builders cut door prep to the dimensions of the 1940s and 1950s, a narrower, deeper cavity than the standard round-bore deadbolt most hardware stores sell today. When those original mortise bodies wear out or corrode, you cannot just drop in a new lock from a big-box store.
A mortise lock replacement or cylinder swap in San Lorenzo typically runs $120 – $240 for a standard mortise cylinder, and $240 – $450 if the entire mortise lock body must be extracted and replaced. If the original door prep can be saved, we do that first. If the mortise case is so far gone that a new one cannot seat properly, we will tell you honestly before any extra boring happens. The price you receive in writing is the price you pay, no call-out surcharge added on arrival.
When the Original Door Prep Can Be Saved
San Lorenzo’s original door prep dimensions repeat block after block, which means a non-destructive entry and rekey pattern that works on one Bohannon mortise lock often works across the whole street. Our technicians have mapped those depths and strikes on hundreds of doors here. When a mortise body is still mechanically sound, we can often replace just the cylinder, rekey it to your existing key system, and leave the original hardware intact. That preserves the door and saves you money.
When the Door Needs a New Bore
Sometimes the original prep has been gored out by previous repairs, or the frame has shifted so far that a mortise body will no longer seat square. In those cases we bore and reinforce for a modern deadbolt, but we use a jig and a backer plate so the door does not end up splintered or weakened. We will show you the written scope before any cutting happens.
Trusted Brands We Service in San Lorenzo
We are factory-authorized to work on Schlage, Medeco, and Abloy hardware, and we carry parts for those lines in our San Lorenzo service vehicles. If your commercial locks are Abloy keyway or a Medeco high-security cylinder, we can key them the day we arrive rather than ordering parts and making you wait. For Bohannon-era mortise cases, we stock both common replacement cylinders and the adapters needed to preserve original door prep without hacking the frame. That means faster turnaround for San Lorenzo customers and fewer return trips.
Common Commercial Locksmith Problems We See in San Lorenzo Homes
- Salt-air corrosion on exterior deadbolts and strikes. San Lorenzo sits close to the southern Bay, where persistent marine fog carries salt that settles into lock cylinders. Deadbolts on gates and workshop doors that have not been serviced in decades seize completely, which forces non-destructive entry methods and cylinder replacement rather than a simple rekey.
- Original Bohannon door prep that rejects modern deadbolts. The mid-century door-prep dimensions repeat across nearly every street in this tract. When a homeowner tries to install a standard round-bore deadbolt, the hardware does not seat, the strike sits proud of the frame, and the door no longer latches cleanly. We correct that with prep modification or a proper mortise replacement.
- Outbuildings and gates keyed separately until key control collapses. Over decades, the house, the workshop, the shed, and the side gate each got their own lock and their own key. No one alive can say who has copies of which. We pull all of it into one master key system in a single visit so you stop carrying a ring of eight keys.
- Long service drives and detached structures far from the house. San Lorenzo lots are deep, and a shop at the back of the property often goes unlocked or gets wedged shut. When you need a lockout at a rear workshop or a gate padlock cut and replaced, tell us upfront so we bring the right tools and enough cylinder pins to handle the whole property in one trip.
Pricing for Commercial Locksmith in San Lorenzo, CA
Here are the honest ranges for the most common jobs we do in San Lorenzo: rekeying a standard knob or deadbolt runs $35 – $65 per cylinder, a master key system for a house-plus-workshop-plus-gate runs $180 – $380, a mortise cylinder replacement runs $120 – $240, and a full mortise lock body replacement runs $240 – $450. Commercial lockouts on Bohannon-era doors run $120 – $220 if no damage is involved, plus parts if a cylinder must be replaced. You will receive a written price before any work begins, and that is the price on the invoice. No bait figure, no surprise total. Call (910) 714-4287 for a free estimate; we quote the full price on the phone before anyone is dispatched.
We Also Serve Cities Near San Lorenzo
Dunmore Locksmith’s commercial service area extends beyond San Lorenzo to the neighboring communities of San Lorenzo‘s neighbors: Castro Valley, San Leandro, Union City, and Oakland. If your business or property sits close to the border, call (910) 714-4287 and we will confirm which crew can reach you fastest. The same written pricing and 365-Day Done Right Promise apply everywhere we work.
Serving San Lorenzo, CA - Our Local Coverage Area
We’re based in the San Lorenzo 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 Commercial Locksmith in San Lorenzo
Yes. We map your locks during the initial call, tell you exactly what needs rekeying or replacement, and send a technician with enough cylinder pins and mortise parts to complete the entire property in one visit. Most San Lorenzo properties with a house, a detached workshop, and a gate take 90 minutes to three hours. The price is written before we begin. Call (910) 714-4287 for a quote.
Salt-laden fog from the southern Bay settles into exterior locks and strikes, and over 70-plus years that rusts the internal pins and the face of the cylinder. Locks that have never been lubricated or serviced can seize completely. Non-destructive entry and a new, properly lubricated mortise or deadbolt cylinder is the standard fix. We coat all replacement cylinders for San Lorenzo properties with a marine-rated lubricant so the salt air has less to bite into.
We can usually replace the mortise cylinder in place and key it to your existing system for $120 – $240, preserving the original mid-century door prep. If the mortise body itself is worn beyond repair, we replace the full lock body for $240 – $450 and seat it properly in the existing prep. Boring for a modern deadbolt is a last resort, and we will quote it separately before any cutting. Call (910) 714-4287 and we will tell you exactly which path your door needs.
On Bohannon-era doors with intact mid-century prep, we almost always enter without drilling. Our technicians carry the picks, bypass tools, and mortise decoders needed to open these locks non-destructively. We will only drill if the cylinder is physically seized beyond manipulation, and we will tell you before we do it. The replacement cylinder cost is quoted before any work starts.
Rekeying. We change the internal pins in each cylinder so every old key stops working, then cut new keys for you on the spot. A standard rekey runs $35 – $65 per cylinder in San Lorenzo. For a house, workshop, and gate, most property owners choose to rekey everything into a master key system in the same visit, which runs $180 – $380. Call (910) 714-4287 and we will quote the exact figure for your locks.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving San Lorenzo and the surrounding Bay Area since 2007.