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 Door Lock Repair Across San Lorenzo
Door lock repair in San Lorenzo usually comes down to one of two realities: your hardware is original to the 1940s – 50s Bohannon tract build-out, or it was swapped decades ago and the salt air has been working on it ever since. Either way, we know what’s behind that door before we touch it. Our Door Lock Repair team reaches most San Lorenzo streets within 45 – 60 minutes, and the price goes in writing before any tool leaves the van. Call (910) 714-4287 and a live person answers, day or night.
Why Dunmore Locksmith Is San Lorenzo’s Preferred Door Lock Repair Company
San Lorenzo is the kind of place where neighbors still recognize each other’s cars and notice a strange van parked at the curb. Our technicians show up in marked uniforms, carry a photo ID badge, and you’ll already have a name and photo sent to your phone before the visit. That’s the Threshold Standard, and it matters more here than most places. You’re not opening your door to an unknown; you’re opening it to the person we told you to expect.
Perry Osgood leads our repair work across the East Bay, and his crews have spent years working through the quirks of Bohannon-era door prep. We answer the phone with a real person 24 hours a day, because a lock that fails at 9pm on Hacienda Avenue doesn’t wait for business hours. Every repair carries the 365-Day Done Right Promise. If the repair fails, we come back at no charge. That’s not a line in a brochure; it’s printed on every invoice we hand to a San Lorenzo homeowner.
Deadbolt Repair in San Lorenzo
Deadbolt repair on a San Lorenzo home often starts with the unpleasant discovery that the bolt won’t throw, or the key turns but nothing moves. That’s typical of the mid-century door specs across this community. The Deadbolt Repair work we do here usually falls between $90 and $190 for freeing, lubricating, and re-aligning an existing deadbolt. If the cylinder itself is corroded beyond saving, a replacement cylinder plus labor typically runs $120 to $220, depending on the finish and brand.
The marine fog off the southern Bay means salt-laden moisture works its way into the bolt housing micro-inches at a time. Exterior deadbolts on Via Alamitos, Bockman Road, and along Hesperian show the same oxidation patterns once they hit 15-plus years without service. We don’t throw away salvageable hardware. A deadbolt that’s sticky but mechanically sound gets pulled, cleaned, re-pinned if needed, and re-set against a properly aligned strike.
When a deadbolt can be saved
If the bolt still extends with moderate resistance and the key doesn’t spin freely in the plug, it’s usually a cylinder issue and can be repaired. If the thumb-turn is stiff but functional, freeing the cam and re-lubricating with a dry graphite film typically restores it. Most Bohannon-era deadbolts that were retrofitted in the 1970s through 1990s still have plenty of steel in them.
When replacement is the honest call
A deadbolt where the tailpiece has snapped, or where the bolt itself has bent from years of the door sagging into the strike, is not worth nursing. The cost difference between a full repair attempt and a new Kwikset or Baldwin deadbolt installed on a properly bored frame is often less than $80. We’ll tell you plainly which path makes sense before you spend a dollar.
Patio Door Lock Repair in San Lorenzo
Patio door lock repair on San Lorenzo’s ranch and cape cod homes usually involves a sliding aluminum door whose original latch has worn down to nothing, or a swing-out patio door with a mortise lock that hasn’t been touched since Eisenhower. The Patio Door Lock Repair jobs we handle here typically run $110 to $260 depending on whether we’re replacing a latch, rebuilding a mortise body, or installing a new auxiliary security bolt. Rapid construction tolerances on these 1950s frames mean the door often sits slightly out of plumb, which accelerates latch wear.
Many original patio doors in this area were fitted with simple spring tension latches, not true locks. The difference matters: a latch keeps the door closed. A lock keeps someone from opening it. We routinely find patio doors where the latch body is original and the strike plate has been bent by decades of forced operation. If the frame is sound, repairing the strike and replacing the latch assembly gets the door functional again without touching the glass or track.
Sliding door tension and track alignment
The fog and temperature swings in San Lorenzo cause aluminum frames to expand and contract, which gradually shifts the door out of position. When the latch no longer meets the strike at the right angle, the lock fails early. We adjust the track rollers before replacing the lock, so the new hardware isn’t working against a misaligned door.
Auxiliary security bolts for patio doors
On a house where the patio door opens onto a backyard that faces a community walking path or greenbelt, we often recommend adding a secondary bolt at the top or bottom rail. It’s a low-cost way to add real resistance against pry attacks, and it gives a second locking point that doesn’t depend on the original 1950s latch. Most auxiliary bolt installs in San Lorenzo run $80 to $150 with the hardware.
Trusted Brands We Service in San Lorenzo
We work regularly with Kwikset, Schlage, Medeco, and Yale hardware across San Lorenzo, from original pin-tumbler cylinders to high-security cylinders that need factory-authorized handling. Since our vans stock the most common replacement parts for these brands, we can often complete a rebuild or rekey in one visit without waiting on a distributor. That matters when you’re standing in front of your door wondering if the key is going to work one more time.
Common Door Lock Repair Problems We See in San Lorenzo Homes
- Original mortise locks with seized cylinders. The Bohannon-era homes built between 1944 and 1960 used mortise bodies that are still in place on a surprising share of San Lorenzo front doors. Salt air fuses the plug to the housing, the key spins or will not insert fully, and the only proper fix is to pull the cylinder and free it, not to force the key.
- Deadbolts that won’t turn because the strike shifted. Thirty years of seasonal humidity swings can move a door frame enough that the bolt no longer lines up with the strike. The deadbolt works, but the frame is fighting it. We realign the strike and often replace it with a wider box strike for a smoother throw.
- Patio door latches ground down to nothing. On the original sliding doors of the tract build-out, the latch has often been opened and closed tens of thousands of times, and the soft metal of the latch tip is simply gone. The door stays closed only by habit and inertia.
- Obsolete cylinder formats on 1940s and 1950s doors. Many original San Lorenzo locks use cylinder lengths and tailpiece dimensions that modern hardware store replacements do not match. A drop-in modern cylinder won’t align with the original mortise body. The right fix is either a rekey of the existing cylinder or a proper retrofit, not a grinder and a prayer.
Pricing for Door Lock Repair in San Lorenzo, CA
Door lock repair in San Lorenzo typically runs $90 to $260 depending on what we find behind the door. A straightforward deadbolt cylinder free and rekey on a Kwikset or Schlage lock usually lands between $90 and $150. A corroded mortise cylinder that has to be pulled and rebuilt runs $130 to $220, and a patio door latch replacement with track adjustment sits around $110 to $190. You get the full price in writing before any work begins, and that’s the price on the invoice. No call-out charge on arrival, no surprise line items. Call (910) 714-4287 for a free estimate.
We Also Serve Cities Near San Lorenzo
Our crews regularly handle door lock repair in San Lorenzo and cover the surrounding East Bay communities, including Castro Valley, San Leandro, Union City, and Oakland. If you have family or rental property nearby, the same written pricing and the same 365-Day Done Right Promise apply wherever we go.
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 Door Lock Repair in San Lorenzo
Yes, in most cases the original mortise lock body is salvageable, and repairing it is usually cheaper and more appropriate than ripping out the door prep. What fails is almost always the cylinder, not the mortise body itself. We pull the cylinder, free the corrosion, rebuild it if needed, and rekey it so the old keys no longer work. That runs roughly $130 to $220. If the mortise body is actually cracked or the internal cam is broken, then replacement is the honest recommendation. Call (910) 714-4287 and we’ll tell you which path applies to your door.
The freeze-up is caused by marine fog and salt-laden air working into the lock body and condensing inside the cylinder. San Lorenzo sits close enough to the southern Bay that overnight fog settles on exterior hardware and the moisture carries salt and particulate deep into the mechanism. When temperatures drop, the internal springs and pins bind. The fix is a proper disassembly, cleaning, and dry-film lubrication, not WD-40 and a prayer. We see this exact failure repeatedly across the Bohannon tracts, and after we service the lock, it typically operates smoothly for years.
Yes, but not always with a quick drop-in. The original door prep on these mid-century doors is often cut to a narrower depth and a different backset than modern standard deadbolts, so the new bolt won’t seat properly without frame modification or re-boring the slab. We measure the existing prep, check the strike placement, and then tell you whether a modern deadbolt fits or whether the frame needs to be adjusted. The installation, including any necessary boring or strike re-alignment, typically runs $140 to $240 in San Lorenzo. Get a written price before we start.
Yes, rekeying is almost always less expensive than replacing hardware, and it’s the right move if your existing locks are mechanically sound. Rekeying a standard knob or deadbolt in San Lorenzo runs $20 to $35 per cylinder, plus a service charge. Replacing the same lock with new Kwikset or Schlage hardware usually runs $60 to $120 per lock installed, and more for heavier Baldwin or Medeco hardware. For most Bohannon-era doors where the original hardware is still doing its job, we recommend rekeying and adding reinforcement hardware rather than full replacement.
Yes, patio door lock repair is one of the most common jobs we do in San Lorenzo. The original 1950s patio doors on the tract homes usually have either a spring latch that has worn flat or a mortise lock that has seized from decades of salt air. We re-align the track, repair or replace the latch, and often add an auxiliary security bolt at the top or bottom rail for extra resistance. Typical patio door lock work runs $110 to $260 depending on the hardware and whether the frame needs adjustment.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving San Lorenzo door lock repair needs with written pricing, named technicians, and a 365-Day Done Right Promise on every job.