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 Sonoma
Door lock repair in Sonoma typically runs $95 – $210 for a standard cylinder rebuild or latch adjustment, and $140 – $320 when we’re rebuilding an original mortise lock body on a 1920s – 1950s home. Most jobs are done same day, and the price is in writing before anyone rolls a truck. If you’re off East Napa Street, up in the hills above Arnold Drive, or anywhere between Boyes Hot Springs and the Plaza, we know the locks on these older Sonoma doors because we’ve rebuilt hundreds of them. Call (409) 405-4485 and you’ll get a live person, a straight answer, and a written price before we dispatch.
Why Preston Locksmith & Security Is Sonoma’s Preferred Door Lock Repair Company
Sonoma’s housing stock is older than most Bay Area cities, and that changes the work. The locks on these doors are not the cylindrical knobs you’ll find in a new subdivision in Petaluma. They’re mortise lock bodies set into the edge of solid wood doors, and the fix is a rebuild, not a swap. Our Door Lock Repair techs pull the lock body, clean or replace the pin stack, and get the original trim working again. That’s the difference between a locksmith who knows Sonoma and one who just drills things out and sells you a new knob.
Kevin Yoon has built this team around one rule: the price on the phone is the price on the invoice. No dispatch fee added at the door, no “this lock’s worse than we thought” upsell. Every repair carries the 365-Day Done Right Promise. If your repaired lock fails within a year, we come back and fix it at no charge, no argument. You also get The Relay Visibility Guarantee on every job: a live arrival time you can track, before-and-after photos from the tech, and a written guarantee you keep.
Door Knob Lock Repair in Sonoma
Door Knob Lock Repair in Sonoma usually means one of two things: a cylindrical knob that’s gone loose or won’t latch, or an older mortise-style knob set where the thumb latch has stopped throwing. On the newer hardware, we tighten the chassis, replace the spindle if it’s worn, and re-set the strike plate so the latch seats cleanly. On a mortise knob, the work is inside the lock body: freeing the jammed deadlatch, cleaning the spring stack, and re-pinning the cylinder so your key doesn’t wobble. A knob rebuild on a Sonoma home runs $95 – $180, depending on the lock’s condition and whether we’re replacing the cylinder or just the internal springs. We quote the full price before we open the door panel.
Worn Latch and Strike Plate Correction
A door knob that turns but won’t hold the door closed is almost always a misaligned strike plate or a latch bolt that’s worn its spring. We file the strike opening, shim the plate to match the door’s settled position, and replace the latch spring if it won’t pop back. On solid wood doors that have swelled or sagged over the decades, this is the most common knob repair we do in Sonoma.
Thumb Latch Freed and Re-Pinned
The thumb latch on a mortise knob set is what throws the deadbolt when you press it from inside. When it won’t move, the usual culprit is old lubricant that’s turned to paste inside the mechanism. We pull the mortise body, clean the pin and tumbler stack, and re-pin it so the key and thumb latch both work smoothly. You keep your original brass trim. No new boring, no split stile.
Broken Key Extractor in Sonoma
Broken Key Extractor in Sonoma is the call we get after someone’s key snaps off in a deadbolt or knob, usually because the lock was already binding. We use a spiral extractor to hook the broken blade and pull it out without turning the cylinder, which means no drilling and no need to replace the lock afterward, as long as the cylinder itself isn’t damaged. Extraction runs $85 – $135. After the key’s out, we test the plug for wear and tell you honestly whether the cylinder’s still good or it’s time to re-pin. You’ll know the full price before we put a tool on the lock.
Irreparable Key Stub on a Mortise Lock
On older Sonoma mortise locks, a snapped key can leave a stub jammed behind the cylinder’s tailpiece, trapped inside the lock body. We remove the mortise cylinder, drift the stub out from the back, and check the pin stack for damage. If the pins are chewed up from the broken key, we re-pin the cylinder to a new key and test the throw before we reassemble the trim.
Key Broke in a Newer Kwikset or Schlage Deadbolt
Newer Kwikset and Schlage cylinders break keys less often, but when it happens, the fix is usually quick. The key blade snaps at a stress point and we pull it with a spiral extractor without marring the plug. If the plug got bent when the key snapped, we replace the cylinder and rekey it to your existing key pattern where possible. No new keyway, no new hardware, no surprise bill.
Trusted Brands We Service in Sonoma
We carry parts and cylinders for Schlage, Kwikset, Medeco, Baldwin, and Yale on the truck, so a Sonoma repair doesn’t turn into a two-trip job. Whether it’s a Kwikset deadbolt on a rental off Verano Avenue or a Baldwin mortise set on a restored Victorian near the Plaza, we stock the pins, springs, and tailpieces that match. Medeco and high-security cylinders take a scheduled visit for a specialized rebuild; standard hardware is same day. Kevin Yoon has made sure every tech is trained on premium locks first, not just the box-store stuff, because Sonoma’s older homes demand both.
Common Door Lock Repair Problems We See in Sonoma Homes
- Original mortise locks bound up by WD-40. A homeowner lubes the cylinder with a wet spray that traps dust and pins, and the thumb latch stops throwing. We strip it, clean it with dry graphite, and re-pin it. This is the single most common repair we do on older Sonoma doors.
- Deadbolts that won’t throw on settled solid-wood doors. The door has sagged a quarter inch over the years, the strike plate doesn’t line up, and the bolt jams. We re-set the plate, lip-file the opening, and adjust the bolt path. No new door, no new frame.
- Cylindrical knobs put in where a mortise lock used to live. Someone swapped the original lock for a big-box knob and now the door’s stile is cracked or the latch misses the strike. We rebuild the original mortise lock when possible, or re-bore cleanly and reinforce with a wrap plate if the original’s gone for good.
- Broken keys in deadbolts and knobs. Usually the lock was already binding and the key got forced. We extract the blade, test the cylinder, and re-pin it rather than selling you a new lock you don’t need.
Pricing for Door Lock Repair in Sonoma, CA
A straightforward door lock repair in Sonoma runs $95 – $180. A mortise lock rebuild on a 1920s – 1950s solid door runs $140 – $320, depending on whether the cylinder needs re-pinning, the spring stack needs replacing, or the lock body itself is cracked. Broken key extraction runs $85 – $135. Rekeying after a repair is $20 – $35 per cylinder. These are the numbers you’ll hear on the phone. No dispatch fee, no call-out surcharge, no price that changes when the tech arrives. Call (409) 405-4485 and you’ll get a written quote before we send anyone. That’s the price on the invoice, guaranteed.
We Also Serve Cities Near Sonoma
Our techs cover the whole Sonoma Valley, from the older bungalows in Boyes Hot Springs to the newer developments west of Petaluma, the hillside homes in Novato, and the compact downtown streets of Cotati. If you’re in Sonoma proper or any of these nearby towns, the same written-price policy applies. See our full Door Lock Repair in Sonoma coverage for details.
Serving Sonoma, CA - Our Local Coverage Area
We’re based in the Sonoma 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 Sonoma
Yes, and that’s our first move on any pre-1960s home in Sonoma. We pull the mortise lock body, free the pin stack, replace broken springs, and re-pin the cylinder so the original brass trim stays on the door. Knockdown rebuilds run $140 – $320 depending on the lock’s condition. A replacement is only recommended when the lock body is physically cracked or someone already bored the door for a cylindrical knob. Call (409) 405-4485 and describe the lock; Kevin Yoon’s team can usually tell you over the phone whether it’s a rebuild or a replace.
A typical repair is $95 – $180, a mortise rebuild $140 – $320, and broken key extraction $85 – $135. We quote the full price on the phone before we send a tech, and that includes parts and labor, not just the trip. No dispatch fee, no “it’s worse than we thought” adjustment at the door. That’s The Relay Standard: a written price before any work starts.
In most cases, yes. We use a spiral extractor to pull the broken blade without drilling, which preserves the cylinder and your existing keyway. If the plug got bent when the key snapped, we replace the cylinder and rekey it to match your other locks if you want that. Extraction in Sonoma runs $85 – $135, same visit as the repair, and we quote it before we start. Call (409) 405-4485 for a same-day slot.
We stock Schlage, Kwikset, Baldwin, and Yale cylinders, pins, springs, and tailpieces on every truck, so most Sonoma repairs are a single visit. Medeco cylinders are scheduled because they’re precision-milled and we do them in a controlled setup, not on a tailgate. If you tell us the brand when you book, we’ll confirm the parts are on the truck before we dispatch.
Every tech arrives in a Preston Locksmith & Security uniform, with a company ID, and you’ll have already seen their photo and live arrival time in The Relay Visibility Guarantee link we text you. The written price you got on the phone is the same one the tech carries. If anything doesn’t match, don’t open the door and call (409) 405-4485. We’d rather you verify than guess.
If your lock’s jamming, your key snapped, or your deadbolt won’t throw, call (409) 405-4485 now. You’ll get a live person, a written price, and a tech who knows Sonoma’s older mortise locks better than anyone. Free estimates, no dispatch fee, and the price you’re quoted is the price you’ll pay.
Written by Kevin Yoon, Owner at Preston Locksmith & Security, serving Sonoma with written-price door lock repair and mortise lock rebuilding.