Smart locks
House lockouts
Re-keying
Deadbolt upgrades
Schlage
Kwikset
Car keys & fobsNon-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.
Get your free estimateLocksmith in South San Francisco, CA
Rekeying locks is the smartest first security move for anyone in South San Francisco, and it’s the service we recommend most often here. The city’s housing stock runs heavily to 1920s – 1950s stucco bungalows and small apartment buildings west of El Camino Real, where original mortise locks and single-cylinder deadbolts are still turning after seventy-plus years of daily use. Add the fog-belt damp and salt-laden air that seize up old lock bodies faster than you’d expect, and South San Francisco keeps a locksmith’s schedule full with hardware that other Peninsula cities retired decades ago. Cypress Lock & Key has served South San Francisco since 2017, and if you need a rekey, a car key, or a 2 a.m. lockout resolved, call (877) 265-4385.
Why South San Francisco Homes Are Different
South San Francisco’s identity as “The Industrial City” shapes the locksmith work we do here more than any marketing slogan could. On the flat grid west of El Camino Real, the original housing stock dates from the 1920s through 1950s. Those homes were built with solid-core doors, mortise lock bodies, and single-cylinder deadbolts that were excellent hardware for their time. They are also now seventy to one hundred years old, and many have never been professionally serviced. We routinely open interior lock bodies in the 94080 zip and find the springs and levers rusted solid from decades of fog-belt condensation. Exterior deadbolts that look fine from the outside, with a clean faceplate and a smooth thumbturn, are sometimes corroded through inside the door. That failure mode is rare in Redwood City or San Mateo. In South San Francisco it is a normal Wednesday.
There is a second South San Francisco, east of Highway 101, where the Genentech campus anchors a dense stretch of biotech and R&D buildings. That side of town runs on master-key systems, restricted keyways, and audit trails, with security requirements that a standard Kwikset rekey cannot meet. Cypress Lock & Key works both sides of the freeway, and the split is real: high-security commercial access control in the labs, aging residential hardware in the flats. The common thread is that salt-laden marine air off the bay shortens hardware replacement cycles across the entire city, especially on west-facing doors. A deadbolt that would last twenty years in San Bruno or a sunnier pocket of the Peninsula might need real attention in ten or twelve here.
The damp also affects rekey timing. New pins in a corroded cylinder do not solve the underlying problem if the cylinder body itself is pitted. We check for that on every South San Francisco rekey, because skipping the inspection means a customer pays for new keys on hardware that will fail again within a season.
Styles & brands we work with







Our Main South San Francisco Services
South San Francisco homeowners and drivers call us most for two problems: car keys that need replacing without a dealership run, and lockouts that cannot wait for business hours. Both are services where the local geography and the city’s lock inventory change how the job goes.
Car Key Replacement in South San Francisco
If you have a car key that snapped, a fob that stopped communicating, or a key lost somewhere between the Costco on El Camino and the 101 on-ramp, Cypress Lock & Key handles automotive key replacement with the same shop you would call for your front door. That matters in South San Francisco, where the dealership alternative often means a tow across town and a service-department wait. We program transponder keys and cut replacements on-site, with dedicated automotive key equipment that most general locksmiths do not carry. The fog and coastal damp here are not kind to key fob electronics, either, and we see moisture-related fob failures regularly in the 94083 area. Car Key Replacement in South San Francisco covers the service in full.

Emergency Locksmith in South San Francisco
A lockout in South San Francisco at night has its own flavor. The flats west of El Camino get cold and damp after the fog rolls in, and a stranded tenant in a 1940s apartment building with a jammed mortise lock wants one thing: someone who can get the door open without destroying the frame. Emergency work here often means dealing with hardware original to the building, not a quick-bore deadbolt drilled in last year. We carry replacement mortise lock bodies and cylinders for exactly that reason, because when the fog is in and the marine layer is dripping off the eaves, the last thing you need is a second trip. Emergency Locksmith in South San Francisco has the full picture, including what to do while you wait.

What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Rekey Locks in South San Francisco
Rekeying is the service that delivers the most security per dollar in South San Francisco, because you change who has access without replacing hardware that still works. In the 1920s – 1950s housing west of El Camino Real, the original mortise locks and single-cylinder deadbolts are often built better than anything you could buy off a big-box shelf today, but their cylinders are full of years of wear, fog-belt corrosion, and unknown spare keys floating around the neighborhood. Rekeying lets you keep the solid hardware and reset the access list. Rekey Locks is our full service hub, but the local version is this: in South San Francisco, we check every cylinder for internal rust before we rekey it, because a rekey of a seized lock is a band-aid on a broken bone. Whether you just bought a bungalow near Orange Memorial Park, changed property managers on an apartment building, or had a tenant move out in the 94080 flats, a rekey is the single best security move for the money.
Rekey Door Lock
Signs you need it
You moved in, a roommate or tenant moved out, a cleaning person or contractor had a key, or you simply cannot account for every copy of your current key.
What it costs in South San Francisco
A standard door lock rekey in South San Francisco typically costs $15 – $25 per cylinder in labor, plus the price of new keys, and comes in lower than replacing the lock outright.
How we do it
We pull the cylinder, replace the pins so the old key no longer turns, cut new keys to match, and reinstall the cylinder with a check that the deadbolt throws smoothly despite the damp air.
Keyed Alike
Signs you need it
You have a ring full of keys and want one key to open the front door, back door, and side gate, or you manage a building where one or two keys should open multiple common areas.
What it costs in South San Francisco
Keying multiple locks alike in South San Francisco typically costs $15 – $25 per cylinder in labor with standard pins, and we quote the exact price before starting.
How we do it
We measure each cylinder, install matching pin stacks across all the locks in the set, and cut the agreed number of keys so every lock turns on the same blank.
What Rekey Locks Costs in South San Francisco
| Item | Typical range in South San Francisco |
|---|---|
| Rekey a single door lock | $15 – $25 per cylinder in labor, plus new keys |
| Rekey multiple locks to one key | $15 – $25 per cylinder in labor, plus a single key set |
| Full-home or small-building rekey | Flat labor based on cylinder count, quoted before work begins |
South San Francisco’s older mortise locks occasionally need a cylinder rebuild before a rekey will hold. We tell you that on the phone when you describe the lock, before anyone is dispatched, and the price we quote is the price on the invoice. No arrival surcharges.
Can you rekey my 1940s mortise lock without replacing it?
In most cases, yes. Mortise lock cylinders are designed to be serviced, and we regularly rekey original 1920s – 1950s mortise bodies in South San Francisco. If the cylinder is too corroded to rekey cleanly, we will show you the problem and give you a replacement price before touching it. Call (877) 265-4385 and describe your lock; we will tell you what is realistic.
How long does a rekey take in South San Francisco?
Most residential rekeys in South San Francisco take 20 – 40 minutes per lock once we are on site. Older corroded cylinders add time, which is why we ask about the age of the hardware when you call. Estimates are free and we quote the labor before dispatch.
Brands We Service in South San Francisco
Cypress Lock & Key works across the lock brands actually installed in South San Francisco, from the Schlage and Kwikset deadbolts on the west-side bungalows to Mul-T-Lock, Sargent, and Abloy restricted keyway hardware on the biotech and commercial side. We carry common pin kits and key blanks in the truck for faster turnarounds on the usual residential brands, and we can match restricted or patent-protected keys for commercial accounts. See our brands for the full list.
Pricing for Locksmith in South San Francisco, CA
| Service | Typical range in South San Francisco |
|---|---|
| Rekey a single door lock | $15 – $25 per cylinder in labor, plus new keys |
| Rekey multiple locks to one key | $15 – $25 per cylinder in labor, plus a single key set |
| Full-home or small-building rekey | Flat labor based on cylinder count, quoted before work begins |
| Standard car key copy | $3 – $10 per key |
| Transponder car key copy | $50 – $100 per key |
| Car key fob programming | $50 – $150 per fob, varies by vehicle |
| Complete lost-car-key replacement | $150 – $350, varies by vehicle year and transponder |
| Emergency lockout service call | $75 – $150 per visit, plus rekey or repair if requested |
| Residential lockout after-hours | Quoted on the phone; overnight and holiday rates are honest and up front |
What pushes a price up in South San Francisco is usually hardware age, not labor games. A corroded 1940s mortise cylinder takes longer to service than a clean modern deadbolt, and a Medeco or Mul-T-Lock restricted keyway costs more to rekey than standard Schlage pins. Fog-belt corrosion also means we sometimes recommend replacing a cylinder rather than rekeying it, and we will show you exactly why before you spend a dollar. The full price is quoted on the phone before anyone is dispatched, and that is the price on the invoice when the work is done.
Neighborhoods We Serve in South San Francisco
We cover the full city, including the 94080 and 94083 zip codes. Response time across South San Francisco runs tight because the city is compact and the street grid west of El Camino moves fast once you are off the main drags.
- The flats west of El Camino Real, 94080
- Old Town South San Francisco and the area around Grand Avenue
- The neighborhoods around Orange Memorial Park
- Terrabay and the hillside streets east of 101
- The biotech and commercial corridor along Gateway Boulevard
Service Area – Cities Near South San Francisco
Cypress Lock & Key works in South San Francisco and the surrounding Peninsula cities. If your property sits just across the border, we regularly travel to Brisbane, CA, San Bruno, CA, Daly City, CA, and Broadmoor, CA for the same rekey and car key work. Call (877) 265-4385 and we will confirm coverage for your address.
Serving South San Francisco, CA — Our Local Coverage Area
We’re based in the South San Francisco 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 Locksmith in South San Francisco
During normal business hours, most South San Francisco calls get same-day visits, often within a couple of hours depending on where you are in the city. Late-night emergency lockouts are handled as they come in. Call (877) 265-4385 and we will give you a real window for your part of town.
Rekeying your own locks needs no permit anywhere in San Mateo County, including South San Francisco. If you rent, your lease may require that the landlord receive a copy of a new key, but the physical rekey work is unrestricted. If you own a condo or townhouse, check your HOA rules about entry hardware if you plan to replace locks rather than rekey them.
Yes. Cypress Lock & Key works the older residential neighborhoods west of El Camino Real and the high-security commercial and biotech buildings east of Highway 101. The equipment and key blanks differ between the two, and we carry what both sides of South San Francisco need. If your building uses restricted keyways, mention the brand when you call so we bring the right hardware. For a quote, call (877) 265-4385.
What happens when you call
- 1A real person answersNo phone trees — talk to a local locksmith pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What South San Francisco Customers Say
"Locked out at eleven at night with a kid asleep in the car. He was there in 25 minutes, had the door open in under two, and did not do the thing where the price goes up once he's standing in front of you."
— Allen Chen"Commercial job, panic bar and a master key system for a small office. Clean install and clear documentation of which key opens what."
— Sofia Hernandez"Installed a smart lock and actually set up the app and the codes with me instead of leaving me to figure it out from a leaflet."
— Renee Doyle