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 Hillsborough
When a lock fails on a Hillsborough estate, the job is rarely a quick deadbolt swap. Our residential locksmith team works on 1920s Tudor Revival front doors with original mortise lock sets, on wrought-iron perimeter gates that have seized from years of Peninsula fog, and on properties where the main house, guest house, and pool house all need to key into one system. We know Hillsborough’s housing stock because we’re in it every week. Call (818) 390-9007 and a live person answers, 24 hours a day, every day of the year.
Why Blackthorn Locksmith & Security Is Hillsborough’s Preferred Residential Locksmith Company
Hillsborough is unlike nearly every other incorporated city in California: zero commercial zoning, every parcel a large single-family estate. That means the locksmith work here skews heavily toward historic mortise hardware, high-security cylinders, and multi-building master key hierarchies, not big-box hardware aisle fixes. Our Residential Locksmith crew treats every Hillsborough job as estate-scale work, because it almost always is.
Homeowners around Hillsborough call us because we name the brand of lock before we touch it, tell them the written price before any work starts, and leave the entryway looking exactly as we found it. Shoe covers go on at the door. Drop cloths go down before tools do. And every Hillsborough technician arrives in uniform, background-checked, with a printed work order that matches the phone quote to the dollar.
Shane Delaney leads our team, and the standard he set is the Cedarwell Care Promise: a written price before work begins, a photo of the clean-up before we leave, and a 365-Day Done Right Promise on every job we complete. If something isn’t right, we come back and make it right. In writing. That matters on a Hillsborough estate where the front door is a 90-year-old piece of craftsmanship and the wrong fix does real damage.
Smart Lock Installation in Hillsborough
Smart Lock Installation in Hillsborough usually means integrating new electronic hardware into a home that was never built for it: thick solid-wood doors, custom jambs, and existing mortise lock sets that predate smart home technology by half a century. We install smart locks from Schlage, Yale, and Kwikset, but what we’re really doing is adapting the new lock to the old door without altering its profile or leaving exposed cutouts.
Fitting Smart Locks to Historic Doors
A 1950s Hillsborough estate door is often 2 1/4 inches thick with a mortise lock body that a surface-mount smart lock won’t cover. We assess the existing prep, tell you whether we can fit a smart lock without modifying the door, and give you the answer before we order parts. If the door can’t take a retrofit cleanly, we’ll say so rather than force it.
Smart Lock Sets That Match the Hardware
Many Hillsborough homes pair new smart deadbolts with Baldwin or Medeco trim to match existing brass or bronze finishes. We stock matching finishes in our service vehicles so the new electronic lock doesn’t look like an afterthought on a $4 million estate. Typical smart lock installation in Hillsborough runs $180-$450 per lock, including labor and hardware configuration.
Sliding Door Lock Repair in Hillsborough
Sliding Door Lock Repair in Hillsborough usually involves patio doors, pool house entries, or guest house sliders where the original lock has worn loose, the latch no longer catches, or the keyway has corroded from years of marine-layer moisture. We repair and replace sliding door locks across the full span of Hillsborough’s housing stock, from original mid-century modern sliders to newer multi-point patio doors.
Worn Latches and Misaligned Tracks
The most common failure we see on Hillsborough sliding doors is a latch that no longer seats because the door has settled or the rollers have worn. We don’t just replace the lock; we check the alignment and wear points so the new hardware actually engages. Typical sliding door lock repair in Hillsborough runs $120-$280 depending on whether we’re rebuilding the existing mechanism or installing new hardware.
Keyed Sliders for Guest House and Pool Access
If your pool house or guest house slider needs to key into a master system, we can key it to match the main residence or install a high-security cylinder that resists picking and bumping. That way a single key works across the property, and the slider stops being the weak point. We always use pet-safe lubricants and quiet tools, especially when kids are napping.
Trusted Brands We Service in Hillsborough
We service and install hardware from Kwikset, Medeco, Yale, and Baldwin, and we stock the parts Hillsborough homes actually use, not just the common retail lines. For historic mortise lock sets we carry matching cylinders, springs, and trim plates so we can restore the original hardware instead of replacing it with something that doesn’t match the door. For estate gates and outbuildings, we cut Medeco and Mul-T-Lock high-security keys in the vehicle while we’re on-site. No ordering, no second visit.
Common Residential Locksmith Problems We See in Hillsborough Homes
- Corroded mortise cylinders on exterior doors. The persistent fog and salt air off the Peninsula hillsides eats at brass keyways year-round. We regularly free up brass mortise cylinders that have seized solid, then re-lubricate with a non-greasy lubricant that doesn’t attract grit.
- Wrought-iron gate locks frozen by the marine layer. We see gate locks on Hillsborough estates that haven’t turned in months, not from break-ins, just from coastal corrosion. We disassemble, clean, replace pins if needed, and key the gate to match the main entry.
- Tall-door multi-point systems out of alignment. Hillsborough’s custom-built estates often have 8-foot front doors with multi-point locking. One warped season or foundation shift and the bolts stop aligning. We realign and service these systems without replacing the hardware.
- Main house and outbuildings keyed separately. It’s extremely common in Hillsborough for a caretaker cottage or pool house to be on a completely separate key system from the main residence. We design a single master key hierarchy so one key handles the property, and restricted keyways so copies can’t be made at a hardware kiosk.
Pricing for Residential Locksmith in Hillsborough, CA
Here’s what residential locksmith work in Hillsborough actually costs, in real dollar ranges, quoted on the phone before anyone is dispatched:
- Lock rekey: $120-$220 for the first lock, then $20-$35 per additional lock keyed to match
- Deadbolt installation: $160-$320 per lock including hardware
- Mortise lock repair or rebuild: $220-$480 depending on parts and extent of corrosion
- Smart lock installation: $180-$450 per lock including configuration
- Sliding door lock repair: $120-$280
- Gate lock service / high-security cylinder: $150-$350 per gate
- Residential lockout: $90-$160, no call-out surcharge added on arrival
The price we quote on the phone is the price on the invoice. Full stop. We write it down before the work begins, and there’s no dispatch fee or show-up fee layered on. Call (818) 390-9007 for a free estimate on any Hillsborough residential lock job.
We Also Serve Cities Near Hillsborough
While this page is focused on Hillsborough, our residential locksmith team also serves nearby cities including San Francisco, San Jose, Los Angeles, and San Diego. If you have a property in one of those areas, we can schedule the same written-price, clean-work service you’d expect from the Blackthorn name.
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 Residential Locksmith in Hillsborough
Usually not, and we recommend against it. On a 1920s Hillsborough estate door, the mortise lock body is fitted into a deep rectangular pocket in the door’s edge. Drilling for a standard cylindrical deadbolt means opening up that pocket, leaving a structural void and visible patching on an original door. The better fix is to rebuild the existing mortise lock with new cylinders and springs, or to retrofit a modern mortise lock that fits the original prep. We do both, and we’ll tell you which your door can take before any work starts. Call (818) 390-9007 for an exact assessment.
Because the marine-layer fog and coastal air on the Peninsula hillsides deposit salt and moisture on exposed brass and steel hardware year-round. The keyway corrodes internally, pins freeze, and the cylinder stops turning even though the gate itself is fine. We disassemble the cylinder, soak and clean the pin chambers, replace any pitted pins, and lubricate with a dry film lubricant that resists moisture better than standard graphite. On gates we service repeatedly, we’ll recommend swapping to a marine-grade or high-security cylinder that stands up to the exposure. Call (818) 390-9007 and we’ll schedule a gate service this week.
A master key system uses cylinders pinned so that individual keys open only their own door, while one master key opens all of them. On a Hillsborough property with a main residence, guest house, pool house, and caretaker cottage, we design a hierarchy: your key opens everything, the caretaker’s key opens only what they need, and each bedroom or office can have its own key if you want. We cut all keys on-site and provide a key chart so you know exactly who holds access to what. Call (818) 390-9007 to have us map your current locks and propose a system.
It depends on how many people have had keys to the property over the years. Hillsborough estates have often passed through multiple owners, staff members, contractors, and house sitters, and every one of those keys is a copy that might exist somewhere. A restricted keyway, the kind Medeco and Mul-T-Lock produce, can only be duplicated by an authorized dealer with proof of ownership. That means no copies at a hardware kiosk, ever. For most Hillsborough homeowners with staff or frequent guests, the restricted system is worth the cost, typically $50-$120 per cylinder upgrade. Call (818) 390-9007 and we’ll quote your property exactly.
Yes. We install smart locks that integrate with most residential alarm panels and smart-home hubs, including systems that support Z-Wave, Zigbee, and Wi-Fi. Before we quote the job, we check what your existing alarm panel and smart-home controller support, then recommend locks that work with what you already have rather than forcing you into a new ecosystem. The goal is one lock that your family and your alarm both recognize. Call (818) 390-9007 for a compatibility check and written quote.
Need a residential locksmith in Hillsborough right now? Call (818) 390-9007. A live person answers, day or night, and we’ll give you a written price before any work begins.
Written by Shane Delaney, Owner at Blackthorn Locksmith & Security, serving Hillsborough since 2008.