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
A door lock that sticks, wobbles, or won’t turn isn’t just annoying. In Larkspur, it’s an open invitation on a hillside street or a quiet Old Town block. We fix it fast. Preston Locksmith & Security serves Larkspur with door lock repair, deadbolt replacement, and patio lock service, with a written price agreed before we dispatch anyone. Call (409) 405-4485 and you’ll get a live person, not a voicemail tree, 24 hours a day.
Our techs know Larkspur’s streets from Bon Air to Escalle. You’ll get a live, trackable arrival time, a background-checked uniformed tech, and before-and-after photos of the work. The price we quote on the phone is the price on your invoice. That’s the whole model.
Why Preston Locksmith & Security Is Larkspur’s Preferred Door Lock Repair Company
We’ve worked on locks in Larkspur long enough to know the difference between a prewar mortise lock in Old Town and a 1980s deadbolt on a Magnolia Avenue hillside home. That matters when someone gives you a price over the phone. A repair that fits one Larkspur door might be the wrong call on another one down the street. We quote based on what you actually have, not a generic lock-swap price.
Our reputation in Larkspur is built on something simple: the tech who arrives is the tech you expected. Background-checked, uniformed, ID in hand. We founded in 2008, and every repair carries a 365-Day Done Right Promise in writing. If it’s not right, we make it right. Full stop.
Booking a door lock repair in Larkspur works like this: you call (409) 405-4485, describe the door and the lock, and we give you a written price before anyone leaves the office. You then get a live arrival time you can track. The tech texts a photo of the issue before touching anything, does the work, and you get a digital invoice with a pay link. No phone tag. No four-hour windows. No bill that swelled between the estimate and the invoice.
Led by Kevin Yoon, our crew services Larkspur locally. Scheduling is coordinated from the brand’s San Francisco Bay Area office, but the van in your driveway is a local one, stocked for Larkspur’s housing stock.
Deadbolt Repair in Larkspur
Deadbolt Repair in Larkspur almost always comes down to two things: a misaligned strike plate or a worn cylinder. Most deadbolts on Larkspur doors are Schlage or Kwikset, and both are repairable on the spot more often than people expect. A standard deadbolt repair in Larkspur runs $85 to $185, which covers realignment, lubrication, tightening, and replacing worn internal parts. A full deadbolt replacement with new hardware and keying runs $145 to $285, depending on whether you choose a Grade 1 or Grade 2 lock.
When the Bolt Binds
Larkspur’s winter moisture makes wood door slabs swell. In lower neighborhoods like Escalle and the flats near Magnolia Avenue, we regularly see deadbolts that won’t throw because the door shifted and the strike no longer lines up. We fix that by planing or shimming the strike plate, not by drilling the door. The fix usually takes 30 to 45 minutes.
Worn Cylinder or Keyway
If your key turns but nothing happens, the cylinder is probably shot. In older Larkspur deadbolts, the pin and tumbler assembly wears down from decades of use. We replace the cylinder, match it to your existing key or rekey it, and you’re done. No new door, no extra holes.
Patio Door Lock Repair in Larkspur
Patio Door Lock Repair in Larkspur typically means fixing the sliding door latch or replacing the mortise-style hook lock on older aluminum or wood sliders. Coastal moisture and seasonal temperature swings here make patio door tracks and frames shift, so the hook no longer seats in the keep. We fix that by adjusting the keeper, replacing the latch, or installing a modern two-point lock if yours is beyond repair.
Sliding Door Won’t Latch
Most Larkspur patio doors get this way in winter when the frame swells or the rollers sag. If the door closes but won’t lock, it’s usually the keeper plate or a bent hook. We reset the plate, adjust the rollers if needed, and test the lock at three points across the track. Expect to pay $95 to $220 depending on whether the latch body needs replacing.
Flimsy Patio Locks and Security Upgrades
Builders put cheap latch hardware on plenty of Larkspur patio doors, especially 1970s and 80s hillside homes. If yours wiggles or opens with a firm push, we’ll show you your options, including a keyed patio lock or an anti-lift pin. The price is in writing before we start.
Trusted Brands We Service in Larkspur
We keep Schlage and Kwikset parts on the van for Larkspur calls because those two brands cover most of the deadbolts and entry locks in this town’s housing stock. We also service Medeco and Yale, which we see more often on newer builds and some commercial storefronts. That means most door lock repairs in Larkspur finish on the first visit. You’re not waiting a week for a part to ship from a warehouse. And if your lock is a brand we don’t stock, we’ll quote the replacement honestly before you pay a cent.
Common Door Lock Repair Problems We See in Larkspur Homes
- Seasonally swollen door slabs in Escalle and lower Old Town. Moisture rises in winter and the wood expands just enough to throw the strike out of line. We’re used to budgeting time for planing and strike-plate adjustment on Larkspur doors, not just handing you a new lock.
- Worn original mortise locks in prewar bungalows. Larkspur’s oldest homes off Magnolia Avenue and in Old Town still have mortise lock bodies. When the cylinder or cam wears, a drop-in modern deadbolt often won’t fit the existing cutout. We measure first.
- Narrow or steep hillside driveways off Magnolia Avenue. Access to some Larkspur front doors means carrying tools up exterior steps. We confirm that at quote time so the tech arrives ready, not surprised.
- Weak latch hardware on 1970s and 80s patio sliders. Many Larkspur hillside houses were built with flimsy slider latches. If your patio door opens with a shove even when locked, you need a better latch, not just a repair.
Pricing for Door Lock Repair in Larkspur, CA
Door lock repair in Larkspur runs from about $85 for a simple strike-plate realignment to $285 for a full deadbolt replacement with new hardware and keying. Patio door lock repair typically runs $95 to $220. The price is written before we dispatch anyone. You’ll know the exact figure, including parts and labor, before the van leaves the office. The full price is quoted on the phone and it is the price on your invoice. Call (409) 405-4485 for a free estimate. It takes about three minutes.
We Also Serve Cities Near Larkspur
Our door lock repair team regularly works in Door Lock Repair jobs across Kentfield, Corte Madera, San Rafael, and Mill Valley. If you’re on the edge of Larkspur or have a rental property nearby, we cover that too. Larkspur is our home base for Marin County service, but we move fast across the neighboring towns.
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
In most cases we can repair the original mortise lock in a Larkspur bungalow. The typical fix is replacing the cylinder, the cam, or the internal springs while leaving the original lock body and trim intact. That preserves the door and the look of the house. We only recommend a full replacement when the lock body itself is cracked or the internal mechanism is worn beyond safe repair. The quote will spell out which route makes sense before we start.
Usually it’s both, in Larkspur. Wet weather swells the door frame, which shifts the keeper plate, and the lock hook misses it by a few millimeters. We fix the alignment, adjust the rollers if needed, and often replace the latch. Expect to pay $95 to $220 depending on whether the latch body needs replacing. Call (409) 405-4485 and we’ll talk through what you’re seeing.
Yes. We stock Schlage and Kwikset parts on the van for Larkspur jobs, along with Medeco cylinders for high-security deadbolts. Most repairs finish in one visit because the parts are already there. If we need something unusual, we’ll tell you before you’re quoted.
You’ll have the tech’s name before they arrive, along with a live tracked arrival time. They’ll be in a branded Preston Locksmith & Security uniform with ID and a marked van. You’ll also get a photo of the issue before any work starts. If the person at your door doesn’t match what we told you, don’t let them in. Call us. We answer live, 24/7.
No. Drilling is the last resort on a Larkspur lock repair, usually reserved for a fully seized deadbolt or a broken key jammed in the cylinder. In most cases we pick or shim the lock open, repair or replace the cylinder, and rekey it to your key. You keep the hardware and the door. We drill only when there’s no non-destructive way in, and we’ll tell you before we do it.
Call Preston Locksmith & Security for Door Lock Repair in Larkspur
You don’t need to live with a lock that fights you every time you turn the key. You don’t need to wait for a four-hour window or wonder what the bill will actually say. Call Preston Locksmith & Security at (409) 405-4485 for a free estimate on door lock repair in Larkspur. A live person answers. You’ll get a written price, a trackable arrival time, and a 365-Day Done Right Promise in writing. That includes a free second visit if the repair fails. No argument, no charge.
Written by Kevin Yoon, Owner at Preston Locksmith & Security, serving Larkspur and Marin County since 2008.