Master Key Systems in Sunnyvale, CA.

Local knowledge matters more in this trade than people realize.

Around Downtown Sunnyvale and Moffett Park tech corridor, we run a lot of commercial calls — restaurants, retail, and offices that turn over staff frequently.

Quick access to US-101 and CA-237 and CA-85 and I-280 means our nearest van can usually clear the freeway and reach you fast — even at peak traffic times.

We dispatch across every Sunnyvale ZIP — 94085, 94086, 94087, 94089 — and our techs know the residential street grid as well as the commercial corridors.

Cross-border jobs into Santa Clara, Mountain View, Cupertino are routine, so the same fast response applies if your address technically straddles a city line.

Older Sunnyvale homes often have mortise or aging cylinder locks that need careful handling — drilling them is rarely the right answer the first time.

Same crew, start to finish. Whether it's a 5-minute lockout or a multi-day master key system in Sunnyvale, the same technician owns your job from arrival to handoff. No "we'll send another guy out for that part."

Mobile, fully-stocked vans. We don't hand you a quote and then "go get the parts." Our trucks carry deadbolts, strikes, smart locks, panic bars, transponder blanks, programmers, extractors, and more — first-visit completion on the vast majority of jobs.

Real reviews, real reputation. Over 1,286 verified reviews and a 4.9-star average. We've built our business one neighbor at a time and we don't gamble that on a single bad job.

Bonded and insured. Bonded & Insured. We can provide our certificate of insurance, W-9, and license info on request — useful for HOAs, property managers, insurance claims, and commercial procurement.

Non-destructive entry first. Our locksmiths are trained to pick, bypass, and decode. We drill only as a last resort, and only after explaining why. Most Sunnyvale lockouts in residential, commercial, and automotive locks are opened cleanly with no damage at all.

Live human dispatcher, 24/7. Call (888) 492-0666 and a real person picks up. No phone trees, no offshore call centers, no callback queues. The dispatcher knows Sunnyvale traffic, knows our nearest van, and gives you a real ETA.

Transparency is the whole point — here's what your call to One & Only Locksmith looks like end to end.

1. You call (888) 492-0666. A live dispatcher picks up. They confirm the address, the issue, and any specifics ("front door deadbolt, Schlage, brushed nickel"). You'll get a clear ETA and a price range.

2. The nearest van rolls. We dispatch the closest fully-stocked technician to your Sunnyvale location. You'll get a text or call when they're a few minutes out.

3. ID and authority verified. For lockouts and rekeys, we verify ownership or authority before opening anything. This protects you and us.

4. On-site assessment. Your tech inspects the lock, door, frame, hardware, and any related issues. We'll explain what we recommend and why.

5. Written, signed quote. Before any work begins, you get a clear written quote. If you don't want to proceed, you don't owe a dime.

6. Clean work. Hardware is installed straight, square, and to manufacturer spec. Strikes are reinforced into the king stud where appropriate. Old hardware is removed and disposed of.

7. Test and tour. We test the lock or system top to bottom, walk you through any new keys/codes/fobs, and answer questions.

8. Receipt and warranty. Itemized receipt by email, plus our workmanship warranty on every install.

9. Master Key Systems-specific testing. Provide written documentation.

Pricing comes up on every call, so let's address it directly.

Standard master key systems calls in Sunnyvale are quoted by our dispatcher when you call. The number depends on a few real variables: the lock or system involved, time of day, distance from the nearest van, and any parts required. Once our technician is on site and has eyes on the job, you get a written quote — and you don't pay anything until you sign off.

Our pricing is in line with other reputable, licensed locksmiths in Silicon Valley. If a quote sounds dramatically lower than ours, it's almost always going to climb dramatically once a technician is on site.

Payment: Cash, Credit Card, Debit Card, Apple Pay, Google Pay. We email an itemized receipt the same day, useful for insurance claims, expense reports, or property management records.

Here are the situations we see again and again from Sunnyvale callers.

1. Multi-unit residential building.

2. Large home with separate ADU or guest house.

3. Property manager for multiple units.

4. Family compound with shared and private spaces.

5. Home office with restricted-access rooms.

We're brand-agnostic — we use whatever fits the job and the customer's budget.

Residential locks: Schlage B60/B62/Encode, Kwikset 980/SmartCode, Yale Assure, Baldwin, Emtek, Medeco, Mul-T-Lock, Level.

Smart locks & access control: August, Schlage Encode, Yale Assure SL, Kwikset Halo, Level Bolt, Salto KS, Brivo, Kisi, Openpath. Mobile, fob, and PIN credentials.

We dispatch across every neighborhood and ZIP code in Sunnyvale.

ZIP codes covered: 94085, 94086, 94087, 94089.

Adjacent areas we routinely serve in the same trip: Santa Clara, Mountain View, Cupertino, Los Altos.

If you're in a gated community or HOA in Sunnyvale, our dispatcher will coordinate guard-house access in advance so you're not waiting on us at the gate.

Stop searching, start solving. Call (888) 492-0666 and a person picks up. We're already on this side of LA.