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Get your free estimateMedeco Locksmith in Larkspur, CA | Citadel Locksmith
Medeco locksmith service in Larkspur means working on high-security cylinders and deadbolts in a town where many homes still carry original mortise hardware from the early 1900s. We’re Citadel Locksmith, an independent Medeco service provider offering Corte Madera Medeco service as well. The thing that makes our work here different? We rebuild and adapt Medeco hardware to fit vintage brass locksets instead of telling you to rip them out. Call (833) 589-8078 for a Medeco estimate in Larkspur, 94939 or 94977.
Why Larkspur Residents Choose Us for Medeco Service
Medeco is not a brand every locksmith stocks or services. Their cylinders use angled cuts and a sidebar mechanism that resists picking, which also means a tech without Medeco training can mangle a perfectly good lock. We carry Medeco Maxum deadbolts, Biaxial cylinders, and M3/M4 format hardware on our trucks. Roland Vásquez, our owner and master locksmith, learned the mechanical side of this trade at City College of San Francisco and has spent decades working on stubborn, sensitive cylinder jobs. When a Medeco key starts binding in a hillside Larkspur door, we usually know the cause before we step inside. We’re not a Medeco dealer and we’re not factory-affiliated. We’re an independent shop that services the hardware daily, and that keeps us honest about repair versus replacement.
For broader Medeco sales & service across the Bay Area, we bring the same OEM-first approach. In Larkspur, our focus lands on retrofits, rekeys, and keeping historic hardware functional.
Styles & brands we work with
Common Medeco Locksmith Problems We Solve in Larkspur
Medeco locks are built tight. That’s what makes them secure. But tight tolerances react to old houses. Here’s what we see most:
- Sticking or binding deadbolts on swelling wood doors. Marin’s damp winters make redwood and fir doors swell. A Medeco Maxum deadbolt that turns fine in August starts fighting you in February. We realign strike plates and adjust bolt clearance rather than forcing the key and snapping it.
- Keyway corrosion in coastal air. Larkspur’s morning fog carries salt and moisture. Inside a Biaxial or M3 cylinder, that means sticky pins and eventually a key that won’t fully insert. We disassemble, clean, and re-lubricate with a dry film lubricant that won’t gum up.
- Misaligned mortise lock retrofits. When a Medeco cylinder gets dropped into an original 1920s mortise lock, the cam often doesn’t line up perfectly with the bolt. The key turns but the bolt barely throws. We machine and shim faceplates so the action is clean.
- Cylinder spin on Maxum deadbolts. A Medeco Maxum mounted onto old brass hardware with a loose retaining plate can spin when you turn the key, and suddenly you’re locked out. We secure the cylinder and replace the tailpiece if it’s worn.
- Lost or restricted Medeco keys on shared driveways. Many Larkspur properties sit behind private lanes off Magnolia Avenue. If a Medeco key goes missing, rekeying is the fast way to restore control. We cut new Medeco keys on-site and rekey the cylinder to match.
Medeco Service in Larkspur: What Local Conditions Mean for Your Equipment
Larkspur’s historic downtown strip and the older flats near Magnolia Avenue were built before standardized lock prep existed. Those original mortise locksets were never designed for a modern high-security cylinder. So when a Medeco gets retrofitted into one, the job often requires custom-machined brass faceplates and adaptations to skeleton-key-era internals, not a simple cylinder swap. A generic locksmith shows up with a drill. We show up with a milling bit and spare brass stock. That is the difference that matters here. In the Bon Air area and the hillside canyons, we also deal with garage and gate hardware that gets far more weather exposure than a front door, and Medeco in Mill Valley faces similar challenges with cylinders needing more frequent service than the same lock would in a dry inland town. Larkspur’s mild but persistently damp air works on every pin, spring, and tailpiece. It’s slow, but steady.
One Magnolia Avenue homeowner called us because their Medeco Maxum deadbolt was sticking, and the key sometimes spun without engaging. We found the original mortise lock’s strike plate had drifted from seasonal wood swelling, misaligning the bolt. We realigned the strike, rebuilt the Medeco cylinder with new pins and springs, and added a reinforcing plate. The lock now turns smoothly and the homeowner kept their vintage brass hardware. That’s the repair path we default to.
Medeco Models & Products We Service in Larkspur
We service the full Medeco lineup that shows up in Larkspur homes and small commercial buildings. That includes Medeco Maxum deadbolts, Biaxial cylinders, M3 and M4 high-security cylinders, and the older KeyMark and Medeco Original formats still sitting on some back doors and garage entries. For parts, we use genuine Medeco OEM cylinders and keys whenever possible. That keeps the high-security warranty intact and the keyway tolerances consistent. On discontinued models where OEM isn’t available, we keep quality aftermarket parts on hand and tell you exactly what we’re installing. Repair beats replacement when the lock body is sound. But if corrosion has eaten the cam or worn the sidebar, we’ll say so, and we’ll quote a swap.
Medeco Service Pricing in Larkspur
Medeco work in Larkspur typically runs as follows. These are honest ranges, not teaser rates.
| Service | Typical Price Range |
|---|---|
| Medeco cylinder rekey (one lock) | $25 – $45 per cylinder |
| Medeco Maxum deadbolt supply & install | $180 – $350 |
| Medeco key duplication (restricted or cut to card) | $10 – $25 per key |
| Service call fee (credited toward repair) | $60 – $120 |
| Medeco mortise retrofit with custom faceplate | $95 – $220 |
What drives the final number is whether we’re rekeying one cylinder or rebuilding a retrofitted mortise assembly, and how much the salt air has corroded. When you call (833) 589-8078, we give you the full price before we dispatch. That is the price on the invoice. No surcharge added when the van pulls up.
Serving Larkspur, CA — Our Local Coverage Area
We’re based in the Larkspur area and know this community well, and we also provide Medeco in Kentfield. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Medeco Locksmith in Larkspur
Yes. We rekey Medeco cylinders to match an existing Medeco key, or to a new key you control. In Larkspur, this is common after a tenant change or when a key goes missing along a shared private lane off Magnolia Avenue. We bring the pins, springs, and key blanks to your door. Call (833) 589-8078 for a quote before scheduling.
In Larkspur, the usual culprits are seasonal wood swelling pushing the bolt out of alignment, or coastal moisture corroding the pins inside a Biaxial or M3 cylinder. We diagnose both on-site, clean or rebuild as needed, and correct the strike alignment so the key turns like it should. If the key is sticking right now, don’t force it, a snapped Medeco key inside a high-security cylinder is a bigger job than the original fix.
Yes, and that’s a big part of our Larkspur work. Older homes near the downtown strip often have original mortise locksets that need custom-machined faceplates when a Medeco cylinder is retrofitted. We adapt the Medeco cylinder to the existing brass hardware rather than cutting the door apart. Call us to have your specific lock assessed.
You can. A Medeco master key system gives you one key for your own home and limited keys for a cleaner, tenant, or property manager. For Larkspur properties behind shared gates or with multiple outbuildings, this is often the cleanest solution. We design the keying chart here in-shop, so you control who holds what.
The Biaxial is the classic high-security cylinder, with angled cuts and a sidebar that resists picking. Maxum is a deadbolt line built to protect against forced entry, often paired with a Biaxial or M3 cylinder. In Larkspur’s older wood-frame houses, we often see Maxum deadbolts on the front door and Biaxial cylinders in the original mortise locks. Both are solid. Both need a tech who understands their tolerances.
Service Areas Near Larkspur
Beyond Larkspur, we run Medeco service into the surrounding Marin and East Bay communities. That includes Larkspur service area coverage for 94939 and 94977, as well as Medeco service in North Richmond and Medeco service in East Richmond Heights for customers on the other side of the Richmond-San Rafael Bridge. We also take calls from Petaluma, Mountain View, and Inverness when the job calls for it.
Book Your Medeco Service in Larkspur Today
If your Medeco lock is sticking, spinning, or overdue for a rekey, call us at (833) 589-8078. We’ll talk through the problem, quote the full price before dispatch, and get to your Larkspur property, usually same day for urgent lockouts and binding cylinders. A lock is only as strong as the decision behind it.
Written by the team at Citadel Locksmith, serving Larkspur and Marin County with Medeco, Mul-T-Lock, and Abloy high-security service, including Medeco service in Ross.