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 San Mateo
When a lock fails in San Mateo, the problem is rarely just the lock. It’s the 60-year-old door frame it sits in, the salt air that’s been eating at the cylinder for decades, and the fact that you need the house secure before you leave for work or put the kids to bed. Our Residential Locksmith team works across San Mateo every day, from the postwar tracts of Beresford to the new builds at Bay Meadows, and we understand how Bay-side corrosion and mid-century hardware interact. Response time to most San Mateo neighborhoods runs 30 to 45 minutes during normal hours, and the phone at (910) 714-4287 is answered by a live person around the clock. We quote the full price before dispatch, in writing, and that’s the number on the invoice.
Why Dunmore Locksmith Is San Mateo’s Preferred Residential Locksmith Company
The name Dunmore comes from old words for a great fort, a stronghold built to keep what’s inside safe. That’s the standard we hold for every San Mateo home we service under the Threshold Group umbrella, where we’ve operated since 2007. Every technician who comes to your door is background-checked, identity-verified, and sent to you by name and photo before arrival. They show a photo ID badge at the door, in a clean marked uniform, and if anyone shows up you weren’t told to expect, that visit is covered at no charge. We call this The Threshold Standard, and it matters most in exactly the moment you’re standing at your front door deciding whether to open it.
San Mateo homeowners consistently tell us the same thing on review platforms and in follow-up calls: they called because we answered with a real person, and they stayed because the written price held and the work was done right. Perry Osgood, who leads our local operations, insists on a 365-Day Done Right Promise on every repair. That’s a written guarantee. If the repair fails inside a year, we return at no charge and make it right. For a city where a seized deadbolt on a fog-cooled evening is a real security gap, that guarantee is the difference between hoping a lock holds and knowing it will.
House Key Locksmith in San Mateo
A House Key Locksmith call in San Mateo usually starts with a key that won’t turn, won’t come out, or snapped off in a cylinder that’s been corroding since the Eisenhower administration. We cut, copy, and rekey house keys for every common residential platform in the city, including original Schlage and Kwikset knob sets in Baywood and Shoreview, where marine air has been working on the brass for half a century. A standard house key copy in San Mateo runs $5 to $15 per key, while rekeying a typical knob or deadbolt cylinder runs $85 to $145 per lock, including new keys, assuming the existing hardware is salvageable. If the cylinder is seized beyond rekeying, replacement hardware adds to the total, and we’ll quote that in writing before any work starts.
Rekeying vs. Replacement
Rekeying changes the internal pins so your old keys no longer work the lock. It’s the right call after moving into a home or losing a key, and it’s far cheaper than replacing hardware. When the cylinder is too corroded to rekey, we replace it and can often match the new cylinder to the keyway of your other locks so one key works the whole house.
Lost Keys on a Schedule
If you lost house keys in San Mateo and need the locks changed before an ex, a subletter, or a stranger with a copied key can use them, we can rekey multiple locks in one visit. We stock common Schlage, Kwikset, and Medeco pins on the truck, so most rekey work happens on the spot. Call (910) 714-4287 and we’ll give you a written price for the full job before the technician rolls.
House Lockout in San Mateo
A House Lockout in San Mateo is the call we take most often after dark and on weekends. You step out to grab the mail, the wind pulls the door shut, and the deadbolt you’ve been meaning to service finally decides to hold. We use non-destructive entry techniques first, and in most San Mateo homes, a standard lockout runs $75 to $150 on weekdays, $120 to $200 nights and weekends, depending on the hardware and time of day. That price is quoted on the phone before anyone is dispatched, and there’s no add-on fee when the technician arrives.
Non-Destructive Entry First
We never drill a lock as a first move. A trained locksmith can open the overwhelming majority of residential locks in San Mateo without damage using picks, bypass tools, or shims. Drilling is a last resort when a lock is genuinely seized or the keyway is damaged beyond manipulation, and we will always tell you the cost and get your go-ahead before touching a drill.
Documenting the Job
Before we open anything, we verify that you have the right to enter the property. Homeowners can show a photo ID with the address. If you’re a tenant, have your lease or landlord contact ready. It’s a five-second check that protects both of us, and it’s why we can stand behind every house lockout we perform in San Mateo.
Trusted Brands We Service in San Mateo
Dunmore Locksmith does factory-authorized work on the hardware San Mateo homeowners actually have installed. We carry parts for Schlage and Kwikset on the truck because Baywood, Beresford, and Shoreview are full of them. We’re also qualified to install and service Medeco and Abloy high-security cylinders for homeowners who want bump-resistant, restricted-keyway protection on a mid-century door. Our local stock means most repairs in San Mateo are completed in one visit, not a two-trip job with a backordered part. If your lock is a 1950s original, ask us about upgrading to a marine-grade ANSI Grade 1 deadbolt with stainless fasteners. It’s the right hardware for a city where the fog rolls in most evenings.
Common Residential Locksmith Problems We See in San Mateo Homes
- Salt-corroded cylinders in Shoreview and Beachpark: The marine air off San Francisco Bay accelerates corrosion in brass keyways and zinc die-cast lock bodies. Pins seize and deadbolts bind, and the usual rekey won’t restore a reliable ANSI Grade 1 lock without replacing the damaged cylinder.
- Rusted strike plates and screw failure in Baywood and Beresford: Because these neighborhoods sit close to the Bay, the steel screws and strike plates on original 1940s – 1960s knob sets rust through faster than the lock bodies themselves. When storm-driven wetting hits an already brittle 60-year-old lock, the door often can’t be secured without a full deadbolt replacement.
- Mismatched lock generations on the same property: A single Baywood or Beresford home might have a 1950s Kwikset on the side door, a 1990s big-box deadbolt on the front, and a new smart lock on the garage. We can unify all three under one keyway so a single key works the entire property.
- Newer Bay Meadows multi-family building access: The redeveloped area near the Caltrain station uses commercial-grade fob and electronic access control systems. When a fob stops working or a reader fails, you need a locksmith who’s fluent in both legacy pin-tumbler hardware and current electronic access platforms, not someone who only does basic lockouts.
Pricing for Residential Locksmith in San Mateo, CA
We publish real ranges because the trade’s bait-pricing problem is the reason homeowners hesitate to call. In San Mateo, a standard house lockout runs $75 to $150 weekdays and $120 to $200 nights and weekends. Rekeying a standard knob lock runs $85 to $145 per cylinder, including new keys. A new deadbolt installation runs $145 to $260 for hardware and labor, with marine-grade ANSI Grade 1 deadbolts at the higher end because they’re the right choice near the Bay. Every price is quoted in writing before work begins, no exceptions. The number we quote on the phone is the number on your invoice, and there is no call-out surcharge added on arrival. Call (910) 714-4287 for a free estimate on your specific job.
We Also Serve Cities Near San Mateo
Our Residential Locksmith in San Mateo coverage extends throughout the Peninsula, and our technicians regularly handle jobs in Burlingame, Belmont, Millbrae, and San Carlos. If your home sits near the city line, or you need service at a rental property in a neighboring town, we’ll dispatch the same background-checked, badge-wearing crew. Call (910) 714-4287 and tell the live dispatcher where you are.
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 Residential Locksmith in San Mateo
Yes, and this is one of the most common storm-related calls we take in Beresford. Storm-driven wetting swells the wood stile and pushes already-corroded cylinders past the point where the deadbolt can seat fully. We correct the alignment, replace rusted screws and strike plates, and swap in hardware rated for marine air, typically for $145 to $260 parts and labor per door. Call (910) 714-4287 for a written quote before we dispatch.
Because those neighborhoods sit close enough to San Francisco Bay that salt-laden marine air and persistent coastal fog hit lock hardware most days of the year. Brass keyways corrode, zinc die-cast lock bodies seize, and steel fasteners rust through. Inland Peninsula cities get the same hardware from the same manufacturers, but their locks aren’t sitting in salt air, so they last longer before failure. The fix in Shoreview and Beachpark is marine-grade hardware with stainless fasteners, not another corroding standard deadbolt.
In most cases, yes. Fifty-to-seventy-year-old knob sets respond to the same non-destructive techniques we use on newer hardware, even after storm-driven wetting has swollen the parts. We carry a full kit of bypass and pick tools sized for original 1940s – 1960s Schlage and Kwikset cylinders. If a cylinder is so seized that non-destructive entry isn’t possible without risking frame damage, we’ll stop and tell you before using a drill.
Yes, and this is exactly the kind of mix we see across Baywood and Beresford. The old Schlage or Kwikset can be rekeyed or re-pinned to match the 1990s deadbolt’s keyway, and depending on the smart lock’s platform, it can often be keyed to the same mechanical key as a backup. The total job for matching three locks under one keyway typically runs $85 to $145 per lock for the rekeying work, plus any replacement cylinders that are too corroded to salvage. We’ll quote it all in writing before starting.
First, secure the opening with whatever you have: a doorstop, a chair, a screwdriver in the strike plate. Don’t leave the house unoccupied with an unsecured entry. Then call us at (910) 714-4287. We treat un-securable doors as emergency calls in San Mateo and will get a technician to you as fast as we can, usually within 30 to 45 minutes. The technician will assess whether the frame, the lock, or both failed, quote a written price to make it lockable, and do the work on the spot.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving San Mateo since 2007.