Published 2026-05-30 · Atlanta Pro Locksmith
Deadbolt Grades 1, 2, 3 Explained: Which to Buy for Your Door
Quick answer: Deadbolts carry ANSI/BHMA grades 1, 2, or 3, Grade 1 offers the strongest residential and light-commercial protection (resists 10+ forced-entry strikes), Grade 2 suits most single-family homes, and Grade 3 covers basic apartment or interior doors. In Atlanta's mix of historic bungalows, midtown condos, and sprawling Buckhead estates, most locksmiths recommend Grade 1 for exterior doors and Grade 2 for side or garage entries.
What the ANSI/BHMA Grading System Measures
The American National Standards Institute (ANSI) and Builders Hardware Manufacturers Association (BHMA) test deadbolts for strike resistance, cycle endurance, and finish durability. Grade 1 locks must survive 10 strikes at 75 foot-pounds of force, 250,000 lock-unlock cycles, and 800 hours of salt-spray corrosion testing. Grade 2 drops to 5 strikes at 75 foot-pounds and 150,000 cycles. Grade 3 requires only 2 strikes at 75 foot-pounds and 50,000 cycles.
Each grade also specifies minimum throw length (the bolt projection): Grade 1 demands one full inch, while Grades 2 and 3 accept ¾ inch or shorter. Longer throws seat deeper into the door jamb, making kick-in attacks harder. Atlanta's older wood-frame homes, common in Inman Park, Candler Park, and East Atlanta, benefit from the extra engagement when jambs have settled or shifted over decades.
Grade 1: Maximum Strength for Front Doors and Commercial Lite-Duty
Grade 1 deadbolts use hardened-steel bolts, reinforced strike plates with 3-inch screws into wall studs, and anti-drill pins in the cylinder. Kwikset Smartcode 955, Schlage B60N, and Medeco Maxum models all carry Grade 1 ratings. Expect to pay $100–$200 for hardware alone; installed cost including labor runs $150–$300 when bundled with a rekey service call.
In Buckhead's gated neighborhoods and Sandy Springs executive homes, insurance carriers sometimes require Grade 1 locks to honor full replacement-cost coverage on high-value policies. Commercial landlords in Midtown and Downtown also install Grade 1 on lobby and office suite doors to meet lease-security clauses. The heavier internal springs mean keys turn with slightly more resistance than cheaper locks, but the mechanical advantage discourages bump-key and pick attempts.
Grade 2: The Sweet Spot for Most Atlanta Homes
Grade 2 locks balance cost and protection. They resist the casual kick or pry bar but cost 30–50% less than Grade 1 hardware. Schlage B62, Kwikset 780, and Yale YH series fall into this category. Installed pricing usually lands between $100–$200, and hardware-only boxes run $40–$80 at local Home Depot or Lowe's stores on Ponce de Leyón or Howell Mill Road.
Atlanta's humid summers and occasional ice storms put outdoor hardware through temperature swings and moisture cycles. Grade 2 finishes hold up well for 5–10 years before showing rust spots on cheaper brass or nickel plate. Homeowners in Decatur bungalows, Virginia-Highland cottages, and Marietta subdivisions find Grade 2 more than adequate when paired with a solid wood or steel door and a reinforced strike plate. If your door is hollow-core or sits in a flimsy frame, even a Grade 1 lock won't add much real security, upgrade the door first.
Grade 3: Budget Option for Low-Risk Entries
Grade 3 deadbolts cost $15–$40 for hardware and install for around $75–$150 including labor. They suit interior doors between a garage and house, basement walk-outs, or secondary side gates. The stamped-steel bolts and plastic internal gears wear faster, so you'll see wobble or binding after a few years of daily use.
Apartment complexes in North Druid Hills and College Park sometimes spec Grade 3 for unit doors because landlords plan to replace hardware every few years anyway. For a single-family homeowner, spending the extra $30–$50 for Grade 2 makes sense on any door that faces the street or alley. Atlanta's property-crime rate sits above the national median, and a visible upgrade, like a Schlage or Kwikset logo versus a no-name brand, can nudge opportunistic thieves toward an easier target down the block.
Frequently asked
Can I install a Grade 1 deadbolt myself, or do I need a locksmith?
If your door already has a standard 2⅛-inch bore and the new lock's backset (2¾ or 2⅜ inches) matches the existing holes, DIY installation takes 20–30 minutes with a drill and screwdriver. Mismatched backsets, off-center prep, or doors thicker than 1¾ inches usually require a locksmith to re-drill cleanly. Atlanta Pro Locksmith charges $100–$250 installed when you supply the hardware, or bundles it into a rekey visit for $150–$300 total on a typical home.
Do smart locks like August or Schlage Encode carry ANSI grades?
Yes. The Schlage Encode and Encode Plus are Grade 1, Yale Assure Lock 2 is Grade 2, and August Wi-Fi Smart Lock (4th gen) is Grade 2. The electronic assembly doesn't weaken the bolt mechanism if the base lock meets the standard. Installation runs $150–$400 depending on whether you need Z-Wave hub pairing, Wi-Fi configuration, or integration with an existing alarm panel.
Will a Grade 1 lock prevent all break-ins?
No lock stops a determined intruder with time and tools. Thieves in Atlanta increasingly bypass doors entirely, climbing through unlocked windows or kicking in flimsy patio sliders. A Grade 1 deadbolt raises the effort bar enough that most burglars move on, but pair it with window sensors, motion lights, and a reinforced strike plate screwed into the wall stud, not just the trim.
How often should I replace a deadbolt?
Grade 1 locks last 15–20 years under normal use; Grade 2 lasts 10–15 years; Grade 3 wears out in 5–8 years. Signs you need replacement include a sticky key turn, visible rust on the bolt, a loose cylinder that spins without engaging, or a bolt that doesn't extend fully. Rekeying every few years (when you move in, lose keys, or fire a contractor) keeps the same hardware but swaps the pin stack for $20–$40 per cylinder plus a service call.
Do Atlanta building codes require a specific deadbolt grade?
Georgia residential code mandates a deadbolt with at least a ¾-inch throw on exterior doors but doesn't specify ANSI grade. Commercial properties follow IBC and NFPA fire-egress rules, which sometimes require Grade 1 for high-occupancy or high-value spaces. Homeowner's insurance policies in Buckhead and Sandy Springs occasionally stipulate Grade 1 for coverage above $500,000, so check your declarations page before buying.