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 Residential Locksmith Across Redwood City
A residential locksmith in Redwood City typically charges $95-$220 for a lock rekey and $140-$340 for a full deadbolt replacement, with most jobs completed the same day. Our technicians know Redwood City’s neighborhoods, from the historic downtown streets to the waterfront corridors, and we arrive ready for whatever lock hardware your home has. Call (818) 390-9007 and a live person answers, 24 hours a day, every day.
Redwood City isn’t one kind of housing. It’s a place where a 1910 craftsman bungalow on a downtown side street sits three blocks from a 2019 apartment building full of tech workers, and where a mid-century ranch in Friendly Acres needs something entirely different from a condo near the Port of Redwood City. We carry hardware and tools for all of it, and we don’t send a generic technician who’s never worked the area. Every crew member is background-checked and uniformed, and every job starts with a written price before any work begins. That’s the Residential Locksmith standard we hold across every home we service.
Why Blackthorn Locksmith & Security Is Redwood City’s Preferred Residential Locksmith Company
Redwood City homeowners call us because we treat the job the way they’d treat it themselves. We put shoe covers on at the door, lay drop cloths where we work, and send a photo of the cleanup before we leave. Not as an upgrade. It’s the Cedarwell Care Promise, and it’s in writing on every visit. The C.A.R.E. values we work by are simple: Clean up like it’s our own home, Ask before we move or touch anything, Respect your time and quiet hours, and Explain the price before the work.
Homeowners across Redwood City, especially families with young children and pets, tell us the same thing: they’ve been burned by trades who left a mess or sprang a surprise charge on them. We answer that by putting the price in writing before a single tool comes out, and making that written price the price on the invoice. No verbal estimates, no call-out surcharge added when the technician arrives. The 365-Day Done Right Promise backs every completed job. If it isn’t done right, we make it right, and that promise covers every residential job, our Commercial Locksmith in Redwood City work, and access-control job we do.
Our Redwood City customers also appreciate that dispatch is coordinated from our San Francisco Bay Area office, with crews positioned to serve Redwood City directly. Shane Delaney has built Blackthorn Locksmith & Security since 2008 around a simple idea: a lock is protection, and so is knowing exactly who’s at your door and what they’ll charge. Blackthorn hedges were planted around homes for the same reason.
Lock Rekey in Redwood City
Lock rekey in Redwood City means changing the internal pins and springs inside your existing lock cylinder so the old keys stop working, while the hardware stays exactly where it is. It’s the fastest, most economical way to restore security after you move into a new home, after a tenant moves out, or after you lose a key. In Redwood City, a standard residential rekey runs $95-$185 per lock cylinder, and most homes with two or three entry doors are done in under two hours.
Rekeying After Tenant Turnover
Redwood City’s apartment and condo buildings near the tech corridor see constant turnover, and a rekey between tenants is the single most important move a landlord can make. We rekey to the building’s master key system where one exists, or to a fresh key if you’re the owner. The written price covers the cylinder, new keys, and cleanup before we leave.
When You Just Moved In
A new house in Woodside Plaza or a condo downtown means you have no idea how many copies of the old key are floating around. Rekeying every entry lock on day one costs less than a single deadbolt replacement and closes that gap permanently. We also recommend it after any contractor, cleaner, or pet sitter has held a key for any length of time.
Door Lock Repair in Redwood City
Door lock repair in Redwood City covers everything from a sticking deadbolt to a key that turns the cylinder but won’t retract the latch, to hardware that’s simply worn out after decades on a craftsman bungalow near downtown. Typical repair work runs $120-$280, including parts and labor, and we always write the exact price before starting. If a lock is beyond sensible repair, we’ll quote a replacement and show you the comparison on the spot.
Mortise Locks on Older Downtown Homes
Many early-1900s homes near Redwood City’s historic downtown still carry their original mortise locksets, built into the door edge rather than bored through the face. These aren’t failures, they’re just old. Instead of cutting into the door to fit a modern deadbolt, we rebuild the mortise lock with new parts, restoring the original function and keeping the door’s historic look intact.
Salt-Air Corrosion on Waterfront Hardware
If your deadbolt is sticking and you live within a half-mile of Seaport Boulevard or the Port of Redwood City, the culprit is almost always internal corrosion. Salt-laden bay air seizes pins and cylinders from the inside out, and the fix is penetrating lubricant and fresh pins, not a whole new lockset. This is a failure mode we see constantly in Redwood City but almost never a mile inland in San Carlos or Menlo Park.
Trusted Brands We Service in Redwood City
We carry and install hardware from Kwikset, Yale, Medeco, Baldwin, and others, from entry-level residential locksets to certified high-security cylinders. That matters in Redwood City specifically because your neighborhood’s housing stock determines your hardware: a mid-century ranch in Friendly Acres often has Kwikset from the 1990s, while condos and newer apartment buildings near Woodside Plaza increasingly use Medeco or Mul-T-Lock for restricted key control. We stock local parts and pinning kits for all of them, so most repairs are completed in one visit.
Common Residential Locksmith Problems We See in Redwood City Homes
Lock problems in Redwood City are shaped by where your home sits. These are the patterns we see week after week.
- Salt-air corrosion near the port. Deadbolts and padlocks within a half-mile of the Port of Redwood City seize internally within a single season as bay air corrodes brass and zinc pins. Keys stick, break off, or won’t turn at all, and the fix is cylinder replacement or penetrating lubricant and new pins.
- Original mortise locks on downtown craftsman and Victorian homes. These 100-year-old locksets need rebuilding, not replacement, and a generic locksmith who cuts into the door frame to fit a modern deadbolt damages a door edge that was never meant to carry that load. We rebuild mortise locks with new parts and keep your door original.
- Restricted key systems compromised by a single copied key. In high-turnover apartment and condo buildings near the tech corridor, one tenant copying a restricted key creates a building-wide security gap. We rekey the entire system and run a key control audit so property managers know exactly how many keys exist and who holds them.
- Worn latch hardware on 1950s-60s ranch homes. Friendly Acres and mid-century Redwood City neighborhoods have latch hardware that’s simply fatigued after 60 years of use. The door swings open when it shouldn’t, or the latch won’t catch. Replacing the latch assembly restores a positive close and eliminates drafts.
Pricing for Residential Locksmith in Redwood City, CA
Here’s what to expect in Redwood City’s market. A standard lock rekey runs $95-$185 per cylinder. A deadbolt installation on a door that already has a standard bore runs $140-$340, including the new hardware. Door lock repair ranges $120-$280 depending on parts needed. A residential lockout (non-destructive entry) runs $110-$220, and a window lock installation or replacement runs $75-$140 per window. Every quote is written before work starts, and it’s the price on the invoice. No call-out surcharge, no arrival fees added at the door. Estimates are free, so call (818) 390-9007 and get an exact number before anyone is dispatched.
We Also Serve Cities Near Redwood City
Our Residential Locksmith in Redwood City crews extend service to neighboring communities including Atherton, Menlo Park, San Carlos, and Palo Alto. If you’re in or around Redwood City, we can reach you quickly, with the same written pricing and cleanup standard on every job.
Serving Redwood City, CA - Our Local Coverage Area
We’re based in the Redwood City 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 Residential Locksmith in Redwood City
Salt-laden air from the Port of Redwood City corrodes the internal pins and springs inside lock cylinders, causing keys to stick or seize within a single season. This is a well-documented local pattern in the Seaport and waterfront district that you won’t see in drier inland neighborhoods like Emerald Hills. The fix is typically penetrating lubricant and fresh pins, or cylinder replacement if corrosion is severe, and it costs $120-$280. Call (818) 390-9007 for a written quote before any work starts.
Yes. Rekeying changes only the pins inside the cylinder, so the door, frame, and hardware stay exactly as they are, and we confirm the freeholder’s permission before starting. We’re careful around doors the freeholder owns, using non-destructive entry methods and leaving no marks. A standard apartment rekey in Redwood City runs $95-$185, and the written price is given before work begins.
Lost restricted keys trigger a building-wide rekey, because one missing key compromises the entire key control system for every unit it could access. We rekey all affected cylinders to a fresh restricted pattern and provide a key control audit so the condo association knows exactly how many keys exist and who holds them. Restricted key systems like Medeco or Mul-T-Lock prevent unauthorized copying, which is why they’re common in Redwood City’s newer condos. Call (818) 390-9007 for a written scope and flat per-lock price.
Yes, and we treat them differently than modern bored locks. Mortise locksets from the early 1900s are built into the door edge, and the right approach is to rebuild the internal components, not to cut a fresh hole for a modern deadbolt. We replace worn levers, springs, and cylinders to restore smooth operation while keeping the door and its original hardware intact. Mortise lock repair in Redwood City typically runs $120-$280.
Rekeying costs $95-$185 per cylinder and changes the internal pins so old keys stop working, while the hardware stays in place. Replacing a lock costs $140-$340 and swaps the entire unit for new hardware. For tenant turnover, rekeying is faster, cheaper, and usually all you need. If the hardware is worn, corroded, or damaged, replacement makes more sense. We’ll show you both prices in writing before any work starts. Call (818) 390-9007 for an exact quote.
When a lock won’t turn, a key breaks off, or a tenant hands back a copied key you didn’t know about, Redwood City homeowners and property managers call Blackthorn Locksmith & Security. We answer with a live person, 24/7, at (818) 390-9007. You’ll get a written price before any work begins, shoe covers and drop cloths inside your home, a photo of the cleanup before we leave, and the 365-Day Done Right Promise on every job. That’s the standard we’ve held since 2008, and it’s the reason Redwood City keeps calling us back.
Written by Shane Delaney, Owner at Blackthorn Locksmith & Security, serving Redwood City since 2008.






