Master Key Systems and Commercial Rekeying in San Diego

A ring of keys for every door is hard to manage, and a lost key can mean rekeying a whole building. A master key system fixes that. Key One Locksmith designs and installs master key systems and rekeys business locks for offices, shops, property managers and apartment buildings across San Diego County.

How a Master Key System Works

• The owner or manager carries one master key that opens every door
• Each employee or tenant gets a key that opens only their own areas
• Shared rooms like storage, laundry or the office can have their own level
• We keep a key chart, so a lost key means rekeying one door, not the whole building

Commercial Rekeying

Staff change, a lost key, or a new lease? We rekey business locks on site so old keys stop working, after hours if needed. Store file cabinet and desk locks can be added to the same system.

How It Works

1. We walk the property and list every door and who needs access.
2. We give you the price before we start.
3. We pin each lock to the plan and cut the keys.
4. We test every key in every door and hand over the key chart.

Why San Diego Calls Key One

• Mobile service. We come to you at home, at work or in a parking lot.
• Open 24/7. Nights, weekends and holidays.
• Upfront price. You hear the price before any work starts.
• Trusted locally. Rated 4.9 stars from more than 1,150 Google reviews. See what customers say.

Frequently Asked Questions

Can you use my existing locks?

Often yes, if they are in good condition and share a keyway. Worn or light-duty locks may need to be replaced first.

Do you work after business hours?

Yes. We are open 24/7, so we can rekey after you close.

Do you install new commercial locks?

Yes. See lock installation and repair and our commercial locksmith page.

Planning a Master Key System?

Call Key One Locksmith at (619) 960-8463. We cover San Diego County, from East County to the coast, 24 hours a day.