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 Mateo
Door lock repair in San Mateo typically runs $95 – $240 for most common fixes, and we can usually have a technician at your door within the hour. If you’re dealing with a lock that sticks, a deadbolt that won’t throw, or a key that spins without turning, call (910) 714-4287 and you’ll get a written price before we dispatch anyone. Our team knows San Mateo’s specific housing stock: the 1950s tract homes in Baywood and Shoreview, the pre-war bungalows near downtown, and the newer Bay Meadows buildings near the Caltrain station. Each requires a different approach, and we carry parts for all of them.
Dunmore Locksmith is part of the Door Lock Repair network serving San Mateo, CA through Threshold Group’s local team. Perry Osgood leads our San Mateo operation, and every technician we send is background-checked, photo-badged, and identified by name and photo before they arrive.
Why Dunmore Locksmith Is San Mateo’s Preferred Door Lock Repair Company
San Mateo homeowners call us because we answer the phone with a live person at any hour, and because the price we quote on the phone is the price on the invoice. No call-out surcharge added at the door, no “we found something else” games. Before any work starts, you get a written price. That’s rare in this trade, and it’s the main reason our San Mateo customers recommend us to neighbors.
We also hold ourselves to a standard most locksmiths won’t touch. Every repair is covered by our 365-Day Done Right Promise: a written guarantee on the job, and if the repair fails within a year, we come back at no charge. Technicians arrive in marked uniforms with photo ID badges, and you’ll receive their name and photo before they ring the bell. If someone shows up you weren’t told to expect, that visit costs you nothing.
Perry Osgood has built the San Mateo team around a simple rule: you should know exactly who is coming to your door before you open it. Dunmore comes from old words for a great fort, a stronghold built to keep what’s inside safe. That’s the standard we work to.
Sliding Door Lock Repair in San Mateo
Sliding door lock repair in San Mateo runs $110 – $220 for most jobs, covering everything from a misaligned latch on a 1960s patio slider to a jammed keyed handle on a newer Andersen or Milgard door. Older San Mateo homes, especially the postwar tracts in Beresford and Shoreview, often have original sliding door locks whose internal springs have simply worn out after 50-plus years of daily use. The fix usually involves disassembling the lock body, replacing the spring or pawl, and realigning the door so the latch seats properly in the frame.
When a San Mateo Homeowner Needs Sliding Door Repair
You’ll know it’s time when the latch no longer catches, the key turns but nothing happens, or you have to lift and wiggle the door to get it locked. In Shoreview and Beachpark especially, marine air accelerates corrosion on the zinc housings, so a lock that worked fine last summer may seize by February. We also see many sliding doors where a previous owner installed a cheap surface-mount lock that never aligned right in the first place.
Repair Versus Replacement
If the lock housing is intact and the keyway still turns, we can usually rebuild it. If the die-cast body is cracked or the internal cam is worn past tolerance, replacement is cheaper than fighting it. We’ll tell you which one applies before any work begins, and the written quote reflects exactly that.
Deadbolt Repair in San Mateo
Deadbolt repair in San Mateo typically costs $85 – $180 depending on whether we’re re-pinning the cylinder, replacing the bolt mechanism, or installing a new bolt housing. The single most common call we get from older San Mateo neighborhoods is a deadbolt that binds partway through the throw. In Baywood and other low-lying areas, salt fog works into the zinc die-cast body, corrodes the internal components, and causes exactly that failure. You’ll feel it as resistance halfway through the turn, and if you force it, the tailpiece can snap.
Why the Deadbolt Binds
Most binding deadbolts aren’t worn out yet. The cylinder gets fouled with corrosion or old graphite, or the strike plate has shifted on a warped door frame. We clean and re-pin the cylinder when it’s salvageable, then adjust the strike so the bolt seats without friction. That keeps your original Schlage or Kwikset hardware in place, which matters if you want to keep a matched keyway across multiple doors.
When the Whole Deadbolt Needs to Go
If the bolt housing is cracked or the locking bar is bent, no amount of cleaning will make it reliable again. We replace it with a new deadbolt, often an ANSI Grade 1 unit that’s bump-resistant and built for the coastal humidity San Mateo throws at it. The labor is the same either way; the hardware cost is the only variable.
Trusted Brands We Service in San Mateo
We’re factory-authorized to service and install Schlage, Kwikset, Medeco, and Abloy hardware, and we keep common parts for these brands stocked for San Mateo calls. That means a standard Schlage deadbolt rekey or Kwikset knob-lock cylinder replacement usually happens in one visit, because we’re not waiting on a distributor. For high-security work, Medeco and Abloy cylinders come with their own key-control policies, and we handle the paperwork and pinning in-house. Most San Mateo repair jobs use parts we already have on the truck.
Common Door Lock Repair Problems We See in San Mateo Homes
- Salt-air corrosion in coastal neighborhoods. In Shoreview and Beachpark, the persistent marine fog carries salt that eats into brass keyways and zinc lock bodies. Pins seize, deadbolts bind, and keys snap off in locks far sooner than they would in Redwood City or Palo Alto. We treat these locks with corrosion-resistant lubricant and replace worn pins during a standard rekey.
- Mismatched lock generations on one property. Baywood and Beresford homes often carry a 1950s original knob lock, a 1990s big-box deadbolt, and a recent smart lock on the garage. We unify these under one keyway when possible, or walk you through the tradeoffs of keeping smart locks on a separate app.
- Warped original doors that fight modern hardware. Pre-war Craftsman bungalows near downtown San Mateo have solid wood doors that have shifted over 70 or 80 years. A new smart lock won’t align properly unless the mortise pocket is adjusted or the strike plate reworked first. We do that work before installing anything electronic.
- Smart-lock retrofits on 1950s doors. San Mateo’s tech-sector residents frequently want keypad or Bluetooth entry on mid-century front doors. The original bore holes don’t match modern lock footprints, and the door thickness varies. We handle the retrofitting, including the mechanical adjustments that make the electronics align correctly.
Pricing for Door Lock Repair in San Mateo, CA
Here’s what you can expect for common jobs in San Mateo: rekeying a standard knob lock runs $75 – $120 per cylinder. Deadbolt repair or cylinder replacement runs $85 – $180 depending on hardware. Sliding door lock repair runs $110 – $220. Smart lock installation runs $180 – $320 including the mechanical prep work older doors usually need. A service call in San Mateo is $59, and that amount is credited toward the repair. The full price goes in writing before any work starts, and that’s the price on the invoice. Call (910) 714-4287 for an exact quote, estimates are free.
We Also Serve Cities Near San Mateo
Our San Mateo crews regularly handle door lock repair in Burlingame, Belmont, Millbrae, and San Carlos. If you’re just over the city line, call us anyway: the dispatch and scheduling run from our San Francisco Bay Area office, and we’ll tell you honestly whether you’re in our same-day service zone.
Serving San Mateo, CA - Our Local Coverage Area
We’re based in the San Mateo 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 Mateo
Yes, if both locks use compatible cylinder formats. A 1950s Schlage or Kwikset knob lock and a 1990s big-box deadbolt can usually be rekeyed to the same key, provided the older cylinder isn’t so corroded that the pins refuse to reset. If the original cylinder is seized beyond rekeying, we’ll show you the replacement option and give you a written price before proceeding. Call (910) 714-4287 and we’ll walk you through it.
Shoreview sits close enough to San Francisco Bay that salt-laden marine air and persistent fog accelerate corrosion inside the lock body. The zinc die-cast components oxidize, the brass keyway gets gritty, and the deadbolt binds. Palo Alto’s drier inland air doesn’t produce the same failure rate. The fix is usually a full disassembly, cleaning, and re-pinning, which we do for $85 – $180 depending on the lock. Call (910) 714-4287 for a written quote.
In most cases, yes. The original bore hole on a 1950s door is usually 1 5/8 inches or 2 1/8 inches, and most modern smart locks fit the larger size. We also need to check whether the door has warped enough to misalign the bolt, and we adjust the strike plate or mortise pocket before mounting the electronics. Smart lock installation runs $180 – $320 including that prep work. Call (910) 714-4287 for a specific quote on your door.
Most jammed sliding door locks are repairable. The internal spring or pawl breaks, or the die-cast housing corrodes from coastal air. If the housing is intact and the keyway turns, we rebuild the lock for $110 – $220. If the housing is cracked or the components are worn past tolerance, replacement is the honest answer, and the cost is comparable. We’ll tell you which one applies after we inspect it, and the written quote reflects exactly what we’ll do. Call (910) 714-4287.
That depends on the lock’s condition and your security needs. Original mortise locks from the 1920s – 1930s are often solid brass and worth rekeying if the internal springs still function. But many of them lack the reinforced strike plates and hardened bolts that modern break-in resistance requires. We rekey the original when it makes sense, and we’ll be direct with you when replacement is the better call for security. Either way, the work is covered by our 365-Day Done Right Promise. Call (910) 714-4287 for a written opinion on your specific lock.
Call Dunmore Locksmith for Door Lock Repair in San Mateo
When a lock fails, you need someone who knows San Mateo’s houses, gives you a written price before touching a tool, and stands behind the work for a full year. That’s what we do. Call (910) 714-4287 for a free estimate on any door lock repair in San Mateo, and our team will get you scheduled. Perry Osgood and the San Mateo crew are ready.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving San Mateo since 2007 as part of the Threshold Group family of independent local locksmith businesses.