Most homes in San Diego shipped from the builder with Grade-3 deadbolts, the residential minimum. Grade-3 is fine for interior doors and cheap for builders to buy in volume, but on an exterior door it fails under a 2-strike impact test. A serious kick-in attempt defeats it.
Upgrading to Grade-1 or Grade-2 is one of the highest-value security upgrades a homeowner can make for under $250 per door. Our deadbolt installation service covers every grade and brand. Here’s what the grades actually mean, which brands and models to buy, and the cheap upgrade that matters almost as much as the lock itself.
What ANSI/BHMA grades mean
The American National Standards Institute and the Builders Hardware Manufacturers Association (BHMA) test residential and commercial locks on three dimensions: durability (cycle count before failure), security (resistance to forced entry), and finish (how long the aesthetics hold up).
Grade 3 (Residential builder-grade)
- Cycle count: 200,000 operations
- Security: Survives 2 strikes from a 75-pound ram
- Where it’s appropriate: Interior closets, bedroom doors, shed locks, anywhere a forced-entry attempt is extremely unlikely
- Where it’s NOT appropriate: Exterior doors on any residence
Most builder-grade Kwikset 600-series deadbolts that ship with tract homes are Grade 3. Our lock replacement service handles the swap when you’re ready to upgrade.
Grade 2 (Upgraded residential)
- Cycle count: 400,000 operations
- Security: Survives 5 strikes from a 75-pound ram
- Where it’s appropriate: Standard residential exterior doors, front, back, side
- Example brands/models: Kwikset 980/985, Schlage B250, Defiant Naples
Grade 2 is the minimum we recommend for any exterior door in San Diego. The price difference from Grade 3 is typically $30-$50 per lock.
Grade 1 (Residential maximum / light commercial)
- Cycle count: 1,000,000 operations
- Security: Survives 10 strikes from a 100-pound ram
- Where it’s appropriate: High-security residential, small commercial, vacation rentals with unknown guest access
- Example brands/models: Schlage B60/B62, Medeco Maxum, Mul-T-Lock Hercular, Kwikset Titan
Grade 1 is overkill for some residential applications and mandatory for others. A rural Julian cabin with no close neighbors benefits more from Grade 1 than a condo in a gated community.
Which Grade-1 models to buy
Not every Grade-1 lock is identical. Here are the models we actually install across San Diego:
Schlage B60 (and B62 for double-cylinder)
Price: $60-$90 for the lock, $180-$240 installed
Best for: Most residential upgrades
The Schlage B60 is the most common Grade-1 deadbolt we install. It’s reliable, widely supported (easy to rekey, duplicate keys are cheap and available), and comes in every finish. The cylinder is Schlage’s standard keyway, compatible with restricted-keyway upgrades if you ever want to lock down key duplication.
Medeco Maxum
Price: $250-$400 for the lock, $380-$500 installed
Best for: High-security applications, restricted-keyway systems, commercial grade
The Medeco Maxum is what we install on estate properties and when a customer specifically asks for pick-resistance and drill-resistance. The Medeco biaxial pin system is dramatically harder to pick than standard pin tumblers, and the restricted keyway means no hardware store can cut a duplicate key without our authorization on file.
Mul-T-Lock Hercular
Price: $280-$420 for the lock, $420-$550 installed
Best for: High-security, restricted keyways, commercial installations
Similar use case to the Medeco, restricted-keyway, drill-resistant, pick-resistant. The Mul-T-Lock ships with a hard-plated cylinder that resists drilling attacks specifically. Popular in Poway custom homes and the high-end Rancho Santa Fe / Fairbanks Ranch market.
Kwikset Titan
Price: $80-$120 for the lock, $200-$280 installed
Best for: Homeowners who want Grade 1 but prefer SmartKey rekey-by-owner
The Kwikset Titan is a Grade-1 deadbolt with Kwikset’s SmartKey technology, meaning you can rekey the lock yourself in 30 seconds with the included learn tool. Good choice for landlords and rental properties where tenants rotate frequently. Note: some older-generation SmartKey cylinders had bump vulnerabilities; Current-gen addresses this.
The strike plate is as important as the lock
Here’s the part most homeowners miss: a $300 Grade-1 deadbolt mounted with factory 3/4” screws into the door trim is barely better than a Grade-3 lock with the same screws. The deadbolt’s cylinder is protected, but the strike plate, where the bolt actually engages, can be ripped out with a single good kick to the door.
The fix is a 3-inch strike-plate screw upgrade. Instead of the short screws that come with most locks (which anchor only into the door trim), you replace them with 3-inch screws that reach through the trim and into the door’s structural framing. A proper 3-inch-screw strike plate dramatically increases the kick-in resistance of any door. The screws cost $5 for a pack of 20, the highest security-per-dollar upgrade in homeownership.
On every deadbolt installation call, we do this upgrade by default unless the homeowner specifically declines. If a locksmith installs a new deadbolt for you without mentioning the strike plate, ask about it.
Single-cylinder vs. double-cylinder deadbolts
A single-cylinder deadbolt has a keyhole on the exterior side and a thumb-turn on the interior. You can always unlock the door from inside without a key, which means you can exit quickly in a fire or emergency. This is the California building code default for most residential applications.
A double-cylinder deadbolt has keyholes on both sides. From inside, you need a key to unlock the door. This is used when there’s glass within 40 inches of the deadbolt (because a burglar could break the glass, reach through, and turn a thumb-turn). The trade-off: in a fire, you need to know where the key is to exit.
In most San Diego homes: install single-cylinder. It’s code-compliant, fire-safer, and simpler. Only use double-cylinder if your door has glass within 40 inches of the lock.
Finishes: what to choose
The finish on your deadbolt affects how it ages. In San Diego specifically:
- Coastal homes (Coronado, Del Mar, Imperial Beach, Oceanside, Carlsbad): use brass, stainless steel, or marine-grade finishes. Anything else will pit within 5-10 years from salt air.
- Inland and desert homes (Escondido, El Cajon, Santee, Borrego): most finishes hold up fine. Choose by aesthetic.
- Mountain and backcountry homes (Julian, Pine Valley, Mount Laguna): prioritize finishes that resist cold-weather cracking. Powder-coated or solid brass are reliable.
What about smart deadbolts with ANSI ratings?
Some smart deadbolts are rated Grade 2 (Schlage Encode Plus, Yale Assure Lock 2 with deadbolt). None are currently rated Grade 1. If maximum physical security is your priority, install a traditional Grade-1 deadbolt on your front door and use a smart lock on a secondary door where convenience matters more. Many homeowners do this, Grade 1 Schlage B60 on the main entry, Yale Assure Lock 2 on the side door for the dog walker.
The realistic security upgrade plan
For a typical single-family home in San Diego:
- Upgrade front deadbolt to Grade 1 Schlage B60, $180-$240 installed
- Upgrade back / side deadbolts to Grade 2, $120-$180 installed per door
- Install 3-inch strike plates on every exterior door, included in the install for $5-10 in parts
- Rekey all exterior doors to keyed alike, $25-40 per cylinder
- Optionally: smart lock on the most-used door, $180-$420 installed
Total for most 2-3 exterior-door homes: $400 to $700, done in a single service call.
Frequently asked questions
How much does it cost to have a Grade-1 deadbolt installed in San Diego?
A Schlage B60 installed by a locksmith runs $180 to $240 all in. That includes the hardware, labor, and upgraded 3-inch strike plate screws. Higher-spec options like a Medeco Maxum or Mul-T-Lock Hercular run $380 to $550 installed. Most locksmiths can complete a two-door front and back upgrade in a single 60 to 90 minute visit.
What’s the difference between a Grade-1 and Grade-2 deadbolt?
Grade-1 survives 10 strikes from a 100-pound ram and carries a 1,000,000-cycle rating. Grade-2 survives 5 strikes from a 75-pound ram and is rated to 400,000 cycles. For most San Diego homes Grade-2 is solid protection on back and side doors; Grade-1 is worth the extra $30 to $50 per lock on the primary entry.
Do I need a single-cylinder or double-cylinder deadbolt?
Single-cylinder with an interior thumb-turn is the right call for most San Diego homes. It’s code-compliant and lets you exit quickly in a fire without searching for a key. Only use a double-cylinder (keyed on both sides) when there’s glass within 40 inches of the lock, such as a door with sidelites, since that configuration prevents a burglar from breaking the glass and reaching the thumb-turn.
Does the strike plate really matter that much?
Yes. Factory strike plates secured with 3/4-inch screws can be kicked out in one or two attempts because the screws only bite into thin door trim. Replacing those with 3-inch screws anchored into the structural stud behind the jamb is the single highest security-per-dollar upgrade available. Every deadbolt installation we do includes this upgrade by default.
What Grade-1 deadbolt works best for coastal San Diego homes?
Schlage B60 in a satin nickel or oil-rubbed bronze finish holds up well in moderate coastal exposure. For homes right on the water in Coronado, Del Mar, or Imperial Beach, ask specifically for solid brass or marine-rated hardware. Anything chrome-plated or thinly nickel-plated will pit within five to ten years in salt air.
Ready to upgrade your deadbolts in San Diego? Swift Key San Diego installs Grade-1 and Grade-2 deadbolts from every major brand, always with reinforced strike plates. Call (858) 925-5546 for a quote, typical 2-door upgrade takes 60-90 minutes in a single visit.