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 Change Door Locks Across Glendora
Changing a door lock in Glendora sounds straightforward until you’re holding a 1950s knobset from a South Glendora ranch and realizing the new deadbolt you bought won’t seat into that original mortise bore. We deal with this every week, from Foothill Blvd storefronts to the hillside homes above Sierra Madre Avenue. Dunmore Locksmith sends background-checked, photo-badged technicians to Glendora with the right parts for both vintage and modern hardware, and the price goes in writing before any work begins. If you need a lock changed today, call (910) 714-4287 and a live person answers, not a voicemail. We coordinate dispatch from our Los Angeles office, and our crews serve Glendora locally.
Why Dunmore Locksmith Is Glendora’s Preferred Change Door Locks Company
Glendora homeowners call us because we stock the parts that national chains don’t. A mid-century Schlage cylinder, an obsolete mortise cassette, a strike plate sized for a 1960s door jamb: these live on our trucks. Before any technician arrives, you receive their name and photo, so when the knock comes you already know exactly who is at the door. That’s the Threshold Standard we operate under as part of the Threshold Group network, which has served customers since 2007. Every job carries the 365-Day Done Right Promise: a written guarantee, and if the repair fails within a year, we return at no charge. Perry Osgood leads our team with a simple rule that no one opens a customer’s door until they have shown a photo ID badge at it.
Local reviews from Glendora customers point to the same thing repeatedly: the technician arrived when promised, explained what was needed before touching the door, and the final invoice matched the written quote. That’s not luck; it’s the point of how we operate.
Patio Door Lock Change in Glendora
Patio Door Lock Change in Glendora is a different animal than front-door work because so many South Glendora homes have original aluminum sliders from the 1960s and 1970s, and the latch hardware on those units was never designed for modern security replacement parts. North Glendora homes with French doors or newer multi-point patio systems need cylinder work matched to the exact manufacturer. In both cases, we replace the lock body, cylinder, or handle set, align the door on its track, and confirm the latch throws cleanly. Expect to pay between $95 and $185 for a standard patio door lock change, with keyed-alike options adding $15 to $35 per additional cylinder.
Sliding Glass Door Hardware
Older Glendora sliders often have a spring-loaded hook latch that has been painted over or corroded by San Gabriel Valley air. We remove the old assembly, match the mortise profile to the door’s thickness, and install a lock that actually engages. If the track rollers are shot, the door sags and no new lock will line up; we flag that before quoting.
Keyed Patio Door Upgrades
Many Glendora homeowners want a keyed lock on a patio door that never had one. We can retrofit keyed cylinders into many slider and French door assemblies, or install a surface-mounted auxiliary lock. The flat price is quoted on the phone before we dispatch, and that number is the number on your invoice.
Door Lock Change in Glendora
Door Lock Change in Glendora jobs split into two worlds. On the South Glendora side, we’re usually removing a worn knobset or adding a deadbolt where the home never had one. On the North Glendora side, we’re often replacing high-security cylinders in multi-point locking systems or retrofitting smart locks onto heavy custom doors. A standard single-cylinder deadbolt swap on a prepared door runs $85 to $135, including the new lock. Full knobset replacement with a deadbolt runs $145 to $220 depending on finish and grade. If the frame needs realignment because Santa Ana winds have warped the door, that correction is quoted as its own line item. No call-out surcharge is ever added on arrival.
Replacing Worn Or Obsolete Knobsets
We carry Kwikset, Schlage, Baldwin, and Yale hardware in our trucks so a same-visit replacement is typically possible. If your knobset is an obsolete brand that no longer has matching parts, we’ll tell you straight and offer a rekey if that’s the cheaper and safer route.
Adding Deadbolts Where None Exist
Many 1940s and 1950s Glendora ranch homes were built with only a knob lock. We bore and prepare the door for an ANSI Grade 1 deadbolt, correct the strike alignment, and leave the original knob rekeyed to match. This is the single most common upgrade we do on South Glendora doors.
Trusted Brands We Service in Glendora
We’re factory-authorized to install and service Schlage, Kwikset, Medeco, Yale, Baldwin, Mul-T-Lock, Sargent, and Abloy hardware. For Glendora specifically that matters, because a Medeco high-security cylinder on a North Glendora gate or a Yale mortise lock on a Foothill Blvd storefront needs exact parts, not a generic swap. We keep local stock of the common finishes and cylinder formats for Glendora’s older homes so most jobs finish same-day. If your hardware is older but in good shape, we’ll say so: rekeying a working Baldwin or Kwikset lock is usually $25 to $45 per cylinder, and it keeps the original fit and finish intact.
Common Change Door Locks Problems We See in Glendora Homes
- Original 1950s knobsets with no deadbolt: South Glendora ranches were built when a knob lock was considered enough. We regularly add a Grade 1 deadbolt because the old knob alone won’t stop a kick-in. The existing knob can usually be rekeyed to match the new deadbolt key.
- Santa Ana wind frame warping: North-facing doors in Glendora’s foothill neighborhoods swell and shift every autumn when the dry winds push through. A deadbolt that threw perfectly in August may miss the strike by November; we realign the frame and adjust the strike so the lock works through every season.
- Corroded gate and padlock cylinders: The hard, mineral-rich water common across the San Gabriel Valley leaves white crust inside outdoor lock cylinders. In some cases we can clean and rekey the cylinder; in others the plug is too far gone and replacement is the honest call.
- Vintage mortise locks on Foothill Blvd storefronts: These pre-war and mid-century mortise bodies use parts that big-box stores don’t stock. We carry mortise cassettes, faceplates, and cylinders for many of the brands found along the Route 66 corridor, so a lock change doesn’t mean ripping out a piece of the building’s original hardware.
Pricing for Change Door Locks in Glendora, CA
A standard deadbolt installation on a prepared Glendora door runs $85 to $135 including hardware. Full knobset plus deadbolt runs $145 to $220. Rekeying a knob or deadbolt to a new key runs $25 to $45 per cylinder. Patio door lock changes run $95 to $185. North Glendora multi-point systems and high-security cylinders cost more because the parts cost more: expect $180 to $350 for cylinder replacement on multi-point or Medeco hardware, depending on the system. The quote we give on the phone is the price on your invoice. That’s a written Dunmore Locksmith guarantee, and we mean it literally. No bait pricing, no surprise “labor adjustment,” no call-out surcharge disclosed at your front door.
We Also Serve Cities Near Glendora
Beyond Glendora, our Change Door Locks crews cover Azusa, San Dimas, Covina, and La Verne on a regular schedule. If you live in one of those cities, the same pricing structure and the same 365-Day Done Right Promise apply. Change Door Locks in Glendora is our core focus for this side of the San Gabriel Valley, and we keep trucks staged to reach outlying neighborhoods quickly.
Serving Glendora, CA - Our Local Coverage Area
We’re based in the Glendora 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 Change Door Locks in Glendora
You can usually rekey the existing knobset for $25 to $45 per cylinder, and that makes all old keys stop working. But a knobset alone is not enough protection on a South Glendora home. We strongly recommend adding an ANSI Grade 1 deadbolt at the same time: the total for rekeying the knob and installing the deadbolt on a prepared door typically runs $110 to $180. Call (910) 714-4287 and we’ll give you a written quote before any technician is dispatched.
Santa Ana wind events push hot, dry air through the San Gabriel foothills and cause wooden door frames, especially north-facing ones, to shift and swell. The deadbolt then binds or misses the strike plate. The fix is realigning the frame and strike, not replacing the lock. We include that realignment as a quoted line item when we see a binding deadbolt, so you know the cost before we start.
Yes. We stock mortise cassettes, faceplates, and cylinders for many pre-war and mid-century mortise brands found in Glendora’s older commercial buildings. National chains rarely carry these parts, which is why we’re the call local property owners make. A typical mortise lock change or rebuild along Foothill Blvd runs $185 to $320 depending on the brand and condition, quoted in writing before we begin.
We change patio door locks in Glendora regularly, and yes, it’s a different job from a standard deadbolt swap. Sliding glass doors use mortise-style latch assemblies, not standard door preps. We match the replacement to the door’s exact thickness and profile, and a standard patio door lock change runs $95 to $185. Our technicians bring the correct profile parts on the truck so the job is usually done in one visit.
If the plug still turns with effort and the key inserts, we can often clean and rekey the cylinder for $25 to $45. If the cylinder is seized or the plug won’t come out without damaging the lock body, replacement is the honest route: $85 to $135 for a standard gate deadbolt or padlock-ready hasp installation. Either way, the price is quoted in writing before we touch the hardware. Call (910) 714-4287 and we’ll tell you straight which option applies to your lock.
Call Dunmore Locksmith for Change Door Locks in Glendora
When you need a lock changed in Glendora, you want one thing above everything else: to know who is coming to your door before you open it. Dunmore Locksmith sends you the technician’s name and photo before the visit, shows a photo ID badge at the door, puts the price in writing before any work begins, and backs every job with the 365-Day Done Right Promise. From South Glendora ranch homes with original knobsets to North Glendora hillside houses with multi-point locks, we bring the right parts and the right training. Call (910) 714-4287 for a free estimate, answered by a live person 24 hours a day, every day of the year.
Written by Perry Osgood, Owner at Dunmore Locksmith, serving Glendora since 2007 as part of the Threshold Group family.