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 Larkspur
Door lock repair in Larkspur typically costs between $95 and $280, depending on whether you’re dealing with a sticking deadbolt on a 1920s Craftsman off Magnolia Avenue or a seized mortise lock from the 1890s that needs cylinder work. We dispatch technicians who know Larkspur’s housing stock by heart, from the Victorian flats near downtown to the hillside homes climbing toward Baltimore Canyon. Most repairs are completed in a single visit. We answer the phone around the clock at (910) 714-4287, and you’ll always get a real person, never a recording.
What makes Larkspur different from Corte Madera or San Rafael is the age of its locks. This city has original hardware you won’t find in newer Marin developments. We carry the internal components for period mortise locksets, Schlage and Kwikset cylinders, and Medeco high-security deadbolts, so we’re not standing in your doorway ordering parts that won’t arrive for a week. When your door won’t latch or your key won’t turn, we can usually fix it that same day.
Why Dunmore Locksmith Is Larkspur’s Preferred Door Lock Repair Company
Larkspur homeowners call us because we work on locks other companies decline. A modern pin-and-tumbler lock is easy enough for any locksmith. But a 1905 Baldwin mortise lockset with original brass internals requires someone who understands how those mechanisms were machined, and how Marin’s marine air wears them down. Our Door Lock Repair team has rebuilt hundreds of these, and we’ll show you the worn part before we replace it.
We’re part of Threshold Group, and we’ve served customers under that umbrella since 2007. The Threshold Standard means every technician we send to your Larkspur home is background-checked and identity-verified. Before the visit, you receive the technician’s name and photo. At the door, they show a photo ID badge. If the person who arrives isn’t the person we told you to expect, that visit doesn’t cost you anything.
Response time to most Larkspur neighborhoods runs 30 to 60 minutes for urgent calls, including the flats near Piper Park, the streets around Madrone Canyon, and the Kentfield border. We schedule more complex work, like mortise lock rebuilds, at a time that works for you.
Sliding Door Lock Repair in Larkspur
Sliding Door Lock Repair in Larkspur is one of our most common service calls, especially in mid-century homes and 1970s-era builds on the city’s hillside streets where patio doors face the bay and take the brunt of daily fog. The typical repair involves a latch that no longer engages the frame, a thumb-turn that spins without moving the hook bolt, or a handle set that’s come loose from years of use. In Larkspur, the cost runs $95 to $190 for most sliding door lock repairs, and we can often complete the job in under an hour.
Marine moisture is the usual culprit. The internal springs and latch pawls inside sliding door locks corrode faster here than in inland Marin. A door that worked fine in June might bind up by October, and forcing it makes the situation worse.
Replacing the Latch and Hook Bolt
When the hook bolt won’t extend into the frame, we remove the mortise-style latch body from the door edge, inspect the internal springs and pawls, and repin or replace the cylinder if it’s part of the handle set. Many Larkspur sliding doors use older Keller or Acme hardware that’s no longer manufactured, so we recondition what’s salvageable and source drop-in replacements when it isn’t.
Realigning the Strike Plate
Sliding doors shift as hillside homes settle, and the strike plate on the jamb can drift a quarter inch out of alignment. The lock then jams against the plate instead of engaging it. We realign the strike, adjust the rollers if the door’s off track, and test the lock through 20 or 30 cycles before we leave. A door that latches smoothly is a door that says secure, and that’s the standard we’ll leave you with.
Deadbolt Repair in Larkspur
Deadbolt Repair in Larkspur usually means one of two things: a single-cylinder deadbolt on a Victorian or Craftsman front door that won’t throw, or a high-security Medeco or Mul-T-Lock deadbolt that’s become stiff due to moisture. In both cases, the repair costs between $110 and $220, and most jobs are done within 90 minutes of arrival.
The most frequent issue on Magnolia Avenue homes is the strike plate, not the deadbolt itself. Wet winters swell the original redwood door frames. The door expands, the strike shifts, and the bolt can’t enter the plate without forcing it. Some homeowners assume the lock is broken. It usually isn’t. The door has moved, and the hardware just needs to be set right.
Repair vs. Replacement
If the cylinder turns and the bolt extends freely when the door is open, the problem is alignment or a worn strike. We fix that by re-mortising the strike pocket, shimming the plate, and adjusting the bolt throw. If the cylinder itself binds or the tailpiece is stripped, we’ll rebuild or replace the cylinder with a new Schlage or Kwikset core, keyed to match your existing keys if you want to keep them.
High-Security Deadbolt Service
We’re factory-authorized to service Medeco and Mul-T-Lock deadbolts, which matters in Larkspur. A patented key system can’t be rekeyed at a hardware store kiosk. When a Medeco cylinder gets gummed up by sea air, we disassemble it, clean the pin chambers, lubricate it with a dry lubricant that doesn’t attract salt residue, and reassemble it. If the cylinder’s beyond saving, we order a factory-pinned replacement and keep you on a temporary secure lock until it arrives.
Trusted Brands We Service in Larkspur
Our technicians carry factory parts for Schlage, Medeco, and Kwikset locks, which covers the overwhelming majority of Larkspur door hardware. We also service Baldwin and Yale mortise locksets, the two brands you’ll most often find on 1880s to 1920s Victorian and Craftsman entry doors along Magnolia Avenue and in the flats below the hills. Because we stock local parts and know the hardware generations used in Larkspur homes, we can usually repair on the first visit instead of quoting you a follow-up appointment.
Common Door Lock Repair Problems We See in Larkspur Homes
- Corroded cylinders from daily coastal fog. The same marine layer that rolls over the Larkspur Ferry Terminal every morning works its way into lock cylinders. Keyway drag and stiff turning are the first signs. We clean and lubricate before the mechanism seizes.
- Swollen Victorian door frames throwing off deadbolt alignment. Along Magnolia Avenue and the surrounding flats, original redwood frames absorb winter moisture and shift. The deadbolt then hits the edge of the strike instead of entering it. This is a realignment job, not a lock replacement.
- Stripped tailpieces on modern knob sets. In newer hillside homes, the internal tailpiece connecting the knob to the latch wears out from repeated use. The handle spins but nothing happens. We replace the tailpiece and often the latch assembly while we’re in there.
- Failed smart lock keypads after fog exposure. Keypad deadbolts mounted on shaded north-facing Larkspur doors collect condensation. The electronics corrode. We’ll diagnose whether it’s the keypad, the bolt motor, or the wiring harness, and replace the failed component rather than the whole unit.
Pricing for Door Lock Repair in Larkspur, CA
Door lock repair in Larkspur runs $95 to $280 for most residential jobs. Sliding door locks fall between $95 and $190. Deadbolt repair runs $110 to $220 depending on whether we’re fixing alignment or rebuilding the cylinder. A full mortise lock rebuild on a Victorian entry door can reach $280 when original parts need machining. Rekeying a standard Schlage or Kwikset lock is typically $25 to $40 per cylinder.
The price we quote you on the phone is the price on your invoice. It’s in writing before any work starts. No dispatch fee, no arrival surcharge, no inflated after-the-fact totals. Call (910) 714-4287 for a free estimate. You’ll talk to a live person who can usually give you an exact quote after a few questions.
We Also Serve Cities Near Larkspur
Our Door Lock Repair in Larkspur service area stretches into Kentfield, Corte Madera, San Rafael, and Mill Valley. If you live in one of those nearby communities, we can dispatch the same background-checked technicians with the same written pricing policy, and we stock parts for the same Marin-specific lock issues in every city we cover.
Serving Larkspur, CA - Our Local Coverage Area
We’re based in the Larkspur 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 Larkspur
Yes. We repair original mortise locks without replacing the door, and we’ve rebuilt hundreds of them in Larkspur’s historic housing stock. The process involves removing the mortise lock body from the door edge, cleaning the internal brass mechanism, re-pinning the cylinder if it’s a keyed lock, and reinstalling it with fresh screws. Most original locks from the 1880s through 1920s were built to be serviced, not scrapped. Only when the lock body is cracked or the internals are ground down beyond function do we recommend a modern mortise lock retrofit. Call (910) 714-4287 and describe your lock. We’ll tell you honestly whether it’s a repair or replacement job before we arrive.
The most common cause is marine moisture working into the Medeco cylinder. Medeco locks use precision-machined pins and sidebars, and the fine tolerances that make them secure also make them sensitive to corrosion. Salt-laden fog penetrates the keyway, and the pins begin to bind. We clean the cylinder, lubricate it with a dry film lubricant, and in severe cases re-pin it with fresh factory pins. The repair typically runs $110 to $220. We can usually do it on the spot since we stock Medeco service parts and have factory authorization. Call (910) 714-4287 for an exact quote.
In most cases, yes. A stuck sliding door lock is usually the result of a corroded latch pawl or a misaligned strike plate from door settlement, not a seized cylinder that requires drilling. We disassemble the handle set, free the mechanism, clean and lubricate the internals, and realign the strike. Drilling is a last resort for locks that are truly beyond repair, and we’ll explain exactly why before doing it. Sliding door lock repair in Larkspur runs $95 to $190 in most cases. Text us a photo of your lock if you’re not sure what type it is, and we’ll give you a straight answer.
Yes. We rekey existing Schlage, Kwikset, Baldwin, and Yale locks to match new restricted key systems, and we install Medeco, Mul-T-Lock, and Abloy cylinders when you want true copy protection. Restricted key systems require a signed authorisation before new keys can be cut, which means no one can duplicate a key at a hardware store, and anyone who tries won’t get far without your sign-off. Rekeying to a restricted system costs more than standard pin-and-tumbler work, typically $45 to $95 per cylinder depending on the system. Call (910) 714-4287 for a detailed quote based on how many doors you want converted.
It’s far more common in Larkspur than inland Marin. Coastal fog condenses inside the keypad housing and on the circuit board, especially on shaded north-facing doors. The contacts oxidise, and the lock either won’t respond or resets intermittently. We open the unit, dry and clean the internal electronics, treat the contacts, and replace the failed component, whether that’s the keypad membrane, the wiring harness, or the bolt motor. If the internals are too far gone, we’ll recommend a replacement model rated for exterior coastal use. Repairs run $95 to $180. Call (910) 714-4287 and tell us the lock’s brand and where it’s mounted. We can often walk you through a temporary bypass so you’re not locked out while we schedule the fix.
Call Dunmore Locksmith for Door Lock Repair in Larkspur
You deserve to know exactly who’s coming to your door before you open it. Every Dunmore Locksmith technician sent to a Larkspur home is background-checked, identity-verified, and sent with a name and photo before arrival. Every price goes in writing before work starts. Every repair is covered by the 365-Day Done Right Promise. If the repair fails, we return at no charge.
Call (910) 714-4287 for a free estimate on any door lock repair in Larkspur. A live person answers, day or night.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving Larkspur and the surrounding Marin County communities as part of the Threshold Group family since 2007.