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 Hillsborough
Door lock repair in Hillsborough means working on estate-scale properties where the lock on the front door is often a Medeco or Mul-T-Lock cylinder, the gate has its own motorized system, and the detached garage sits a hundred feet from the main house. Most Hillsborough calls we handle involve repairs or rekeying that a standard Peninsula locksmith’s truck simply isn’t stocked for. We dispatch background-checked, photo-badged technicians from our San Francisco Bay Area office directly to Hillsborough, typically within the hour for urgent lockouts and broken-key extractions. Call (910) 714-4287 and you’ll speak to a live person who can tell you exactly who’s coming to your door, by name and photo, before they arrive.
Dunmore Locksmith has served Hillsborough as part of the Threshold Group since 2007. Our Door Lock Repair team carries restricted keyway pinning kits, antique-compatible mortise lock parts, and high-security cylinders on every truck that rolls into Hillsborough.
Why Dunmore Locksmith Is Hillsborough’s Preferred Door Lock Repair Company
Hillsborough is unlike any other San Mateo County city for a locksmith. The town’s ordinance bans apartments and commercial buildings outright, which means every single call we take here involves a single-family estate, not a condo unit or storefront. That changes everything about the job: multiple exterior access points, long gated driveways, outbuildings and guesthouses, and door hardware that is almost always high-security or antique. We built our Hillsborough service around that reality.
Perry Osgood, who leads Dunmore Locksmith, set the standard for how our technicians roll into Hillsborough: background-checked, identity-verified, uniformed, and carrying a photo ID badge shown at the door before any work begins. You receive the technician’s name and photo before the visit. If someone shows up who you weren’t told to expect, that service call is free. That is the Threshold Standard, and it matters more in Hillsborough than anywhere else we work: homeowners here are often making decisions about who enters a home where children, household staff, and high-value property are all present.
We also carry the exact parts Hillsborough’s older homes require. A 1930s Spanish Colonial on Ralston Avenue with original mortise lock bodies needs a technician who can machine a cylinder to fit, not someone who reaches for a drill. Our team is factory-authorized on Schlage, Medeco, Mul-T-Lock, Abloy, Baldwin, and Yale hardware, which covers nearly every lock we encounter in Hillsborough’s housing stock from the 1920s through today’s new builds near the Burlingame border.
Door Knob Lock Repair in Hillsborough
Door Knob Lock Repair in Hillsborough typically runs $95 to $210 depending on whether we’re re-pinning the existing cylinder, replacing worn internal springs, or installing a new knob and deadbolt set. Most homes here have entry knobs paired with a separate deadbolt, and the common failure on older estates is a worn pin tumbler that no longer returns smoothly when you turn the key, especially after decades of coastal moisture working into the mechanism.
What We Repair on Hillsborough Knob Locks
We rebuild the internals rather than defaulting to replacement when the knob assembly has sentimental or architectural value. For a 1920s mansion on Oakmount Drive, that often means sourcing replacement springs and machining a new cylinder to fit the original mortise body. For mid-century homes with standard bored cylindrical knobs, the fix is usually faster: replace the tailpiece, re-pin the cylinder, and re-key to match your existing keys or a new key system.
When Knob Repair Isn’t Enough
If the latch is binding against the strike plate because the heavy wood door has settled, we adjust the hinges and realign the plate rather than forcing the knob. On Hillsborough’s custom tall doors, the weight of the slab itself causes more knob and latch wear than any other single factor. We’ll tell you honestly whether a repair will hold up or whether the knob has reached the end of its service life and should be replaced with a Kwikset or Baldwin unit carrying our 365-day written guarantee.
Broken Key Extractor in Hillsborough
A Broken Key Extractor is the tool and the technique we use to remove a snapped key from a lock cylinder without drilling the lock or destroying the cylinder. In Hillsborough, broken keys are most common on older Medeco and Schlage high-security cylinders where the key blank is brass and the cylinder has hardened steel pins; over years of daily use, the brass fatigues at the bow and snaps off clean inside the keyway. Our non-destructive extraction on a Hillsborough estate call runs $120 to $220, including verifying the cylinder still functions and cutting a replacement key if one is needed.
Non-Destructive Extraction First
We always attempt extraction with broken-key pullers and spiral hooks before recommending any drilling. On restricted keyway systems like Mul-T-Lock and Medeco, drilling destroys a $200-plus cylinder that our team can usually save in under ten minutes. If we can’t remove the fragment cleanly, we’ll tell you before anything is drilled, and you’ll have the full price in writing first.
What Happens After the Key Comes Out
Once the broken piece is out, we test the plug rotation, inspect the pins for damage from the snap, and re-lubricate with a dry graphite or PTFE lubricant suited to Hillsborough’s fog and salt air. If the cylinder shows wear, we’ll recommend either re-pinning or replacement with a new high-security cylinder, and you’ll know that cost before we proceed.
Trusted Brands We Service in Hillsborough
We’re factory-authorized to service and install Schlage, Medeco, Mul-T-Lock, Abloy, Baldwin, Yale, and Kwikset hardware. For Hillsborough specifically, we keep restricted key blanks and pinning kits for Medeco and Mul-T-Lock on our trucks, because so many estates here use patented keyways that can’t be duplicated at a hardware store or locksmith kiosk. When a 1960s mid-century home off Trousdale Drive still has its original Schlage deadbolt, we can re-key or rebuild it the same day. When a newer build uses Abloy or Baldwin, we service that too, but the Hillsborough reality is that high-security and antique hardware dominate the calls.
Common Door Lock Repair Problems We See in Hillsborough Homes
- Coastal fog and salt-air corrosion on gate locks and exterior cylinders. The marine layer that rolls over Hillsborough from the Bay keeps exterior hardware damp for hours each morning, and wrought-iron gates on properties near Crystal Springs Road corrode at a rate you simply don’t see in Woodside or other drier Peninsula towns. We clean, re-lubricate, and replace corroded pins more often in Hillsborough than anywhere else we serve.
- Worn antique mortise locks on 1920s – 1940s Spanish Colonial and Mediterranean estates. Original lock bodies on homes along Ralston Avenue and Brewer Drive often still work structurally, but internal springs fatigue and pin tumblers wear until keys stick or won’t turn. Standard replacement cylinders don’t fit these bodies without custom machining or antique-compatible parts, which we carry.
- Multiple doors, outbuildings, and gate systems on a single property, all on different keys. Hillsborough’s large lots mean a single call can involve a main residence, a guesthouse, a motor court gate, and a detached garage, each with its own keyway. Whole-property rekeying after household staff changes is a standard request here, not an oddity.
- Patented high-security keyway systems that other locksmiths can’t service on-site. Medeco and Mul-T-Lock cylinders require restricted key blanks and specialized pinning kits. A locksmith without those on the truck may default to drilling a functional cylinder rather than performing a non-destructive repair. We carry the full kits.
Pricing for Door Lock Repair in Hillsborough, CA
A straightforward door knob or deadbolt repair in Hillsborough runs $95 to $210. Broken key extraction runs $120 to $220. Rekeying a standard knob lock typically runs $75 to $150 per lock, while rekeying a Medeco or Mul-T-Lock high-security cylinder runs $135 to $260 per lock because of the restricted pins and specialized labor. Whole-property rekeying for an estate with a main house, guesthouse, and gate starts around $450 and goes up based on the number of cylinders and whether we’re establishing a master key system. Every price is delivered in writing before any work begins, and that written price is the price on your invoice. Call (910) 714-4287 for an exact quote, and we’ll talk through your specific doors before anyone is dispatched.
One thing Hillsborough homeowners deserve to hear plainly: the price we quote on the phone, and confirm in writing before work starts, is the final price. There is no call-out surcharge added on arrival. We built our reputation in Hillsborough on that commitment, and it’s part of the 365-Day Done Right Promise that covers every repair we perform here: if the repair fails within a year, we return at no charge.
We Also Serve Cities Near Hillsborough
Our Hillsborough crew regularly crosses into neighboring cities for door lock repair jobs that need the same high-security and antique lock expertise. We handle Door Lock Repair in Hillsborough alongside service calls in Los Angeles, San Diego, San Jose, and San Francisco. If you own a second property in one of those cities, or have family who needs a rekey after a move, the same Threshold Standard applies to every job we take.
Serving Hillsborough, CA - Our Local Coverage Area
We’re based in the Hillsborough 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 Hillsborough
Yes, in most cases we can rebuild the original mortise lock body and machine a new cylinder to fit without touching the door itself. Hillsborough’s 1920s – 1940s Spanish Colonial and Mediterranean estates on streets like Oakmount Drive and Brewer Drive often have lock bodies that are still structurally sound, but the internal springs and pin tumblers have worn out after 80-plus years. We carry antique-compatible parts and the tooling to fit modern high-security cylinders into those older bodies. Call (910) 714-4287 and describe your lock; we’ll tell you over the phone whether it’s a rebuild, a cylinder replacement, or a rare case where replacement makes sense.
Yes, we design and install master key systems for Hillsborough estates regularly, typically using Medeco or Mul-T-Lock restricted cylinders so no one can copy a key at a hardware kiosk. You can carry one key that opens everything, while household staff or property managers get keys limited to specific doors. This is one of the most common requests we field after staff turnover in Hillsborough households. Written pricing for a full master key system comes before any work starts, and you can reach us at (910) 714-4287 to map out your property over the phone.
In Hillsborough, the usual cause is coastal fog and salt air corroding the internal pins and springs, not a lack of lubricant. Marine moisture condenses inside the cylinder every morning, and over time the brass pins develop a gritty corrosion that oil or WD-40 can’t flush out, and in some cases actually makes worse by attracting dirt. We disassemble the cylinder, clean each pin, and re-lubricate with a dry graphite or PTFE lubricant rated for marine conditions. If the cylinder is too far gone, we’ll quote a replacement before doing anything. Call (910) 714-4287 for a gate lock assessment in Hillsborough.
We can duplicate restricted Medeco and Mul-T-Lock keys if you are the registered owner of the keyway and we can verify that through the lock system’s records. Restricted key blanks are not sold to the general public, so a hardware store or kiosk cannot copy them. As a factory-authorized Medeco and Mul-T-Lock service provider, we have the blanks and the card system to cut duplicate keys on-site at your Hillsborough property. Call (910) 714-4287 with your keyway card or the number stamped on the key, and we’ll confirm what we need to process the duplication.
Yes, we perform non-destructive broken key extraction and save the cylinder in more than 90% of Hillsborough calls. We use spiral hook extractors and broken-key pullers to grip the snapped fragment and slide it out through the keyway without drilling. On high-security Medeco or Mul-T-Lock cylinders, this saves you a $200-plus replacement and keeps your restricted keyway intact. We always attempt extraction first and only discuss drilling if the fragment is truly unrecoverable. Call (910) 714-4287 and we’ll walk you through what to expect before we head to your Hillsborough address.
Your Hillsborough Door Lock, Fixed Right
Hillsborough’s estate-only zoning, coastal fog, and concentration of high-security cylinders create a door lock repair landscape that generic Peninsula locksmith pages never address. We do. Perry Osgood and the Dunmore Locksmith team have serviced Hillsborough’s unique properties since 2007, from 1920s mortise locks on Ralston Avenue to modern Medeco master key systems near Crystal Springs Road. Every technician who comes to your door is background-checked, identity-verified, and sent to you by name and photo before the visit. Every job carries a written 365-Day Done Right Promise: if the repair fails within a year, we return at no charge. Call (910) 714-4287 for a free estimate, spoken to a live person, any hour of any day.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving Hillsborough and the San Francisco Bay Area since 2007.