Door Lock Replacement Cost: $76–$523 (Average $180) in 2026

How much does it cost to replace a door lock?

Professional door lock replacement costs $76 to $523 per lock, averaging around $180 nationally (Thumbtack). HomeGuide reports a tighter full-replacement figure of $80 to $225 per door, including hardware and labor, while This Old House’s figures for a locksmith swapping an exterior lockset run higher — $146 to $229 for the hardware plus $91 to $194 in labor, or $237 to $423 total. The spread comes down to what’s being replaced: a basic interior knob lock is a quick, cheap swap, while an exterior lockset with a deadbolt, or a smart lock with app connectivity, takes more hardware and more labor time. Bob Vila frames it similarly from the hardware side, pricing lock hardware alone at $40 to more than $500 per lock, plus roughly $200 more (about $75 an hour) if you hire a pro instead of installing it yourself. If your exterior door itself needs work rather than just the lock, see our front door replacement cost guide for slab and frame pricing.

Is it cheaper to rekey or replace your locks?

Rekeying is usually the more expensive per-door option, not the cheaper one. Rekeying — modifying the internal pins so a new key works and old keys don’t — costs $100 to $300 per door, while a full lockset replacement costs $80 to $225 (HomeGuide). That’s because rekeying requires a locksmith’s specialized pin kit and know-how, and it’s billed as a service rather than a hardware sale. The DIY math flips this: a rekey kit for matching your existing lock brand costs $15 to $25, versus $50 to $200 to have a pro do it (Bob Vila). Rekeying makes the most sense when your current locks are in good shape and you just want old keys deactivated — after a move, a breakup, or losing a set of keys. Full replacement is worth the extra hardware cost when locks are worn out, damaged, or you’re upgrading to a higher security grade or a different lock style. If you have several locks that use different keys, a locksmith can often rekey all of them to a single key at no extra charge beyond the standard rekeying fee per lock (HomeGuide).

How much do deadbolts and smart locks cost?

A standard deadbolt installs for $80 to $225, in the same range as a basic cylinder lock at $75 to $200 (HomeGuide). Pairing a deadbolt with a handle set into a full exterior lockset costs more, $140 to $350 installed, and a high-security mortise lock — the kind fitted into a pocket cut into the door edge — runs $120 to $500 or more. Smart and electronic locks sit at the top of the range at $135 to $450+ installed (HomeGuide). Fixr, which covers smart locks specifically, puts the typical installed cost at $250 to $400, with pricing swinging from $150 for a basic keypad model up to $1,200 for a premium connected lock; by connectivity type, Wi-Fi and Bluetooth models run $200 to $300 while biometric (fingerprint) models run $250 to $450. Hardware security grade matters too — HomeGuide notes that a basic Grade 3 lock costs $15 to $30, while a Grade 1 lock from a brand like Medeco or Mul-T-Lock can cost $100 to $300+ for the hardware alone. If you’re weighing a broader upgrade, our security system installation cost guide covers how smart locks fit into a whole-home setup.

How much does an emergency or lockout locksmith call cost?

A standard locksmith service call costs $60 to $140, which typically covers the locksmith’s trip plus the first hour of labor; additional time runs $50 to $100 per hour on top of that (HomeGuide). Call outside business hours — nights, weekends, or holidays — and that fee roughly doubles to $130 to $240 (HomeGuide). This Old House separately reports $169 to $205 for a locksmith to unlock a house, and puts the average cost of locksmith services generally at around $150, with a typical range of $90 to $195. Because the service call fee is fixed regardless of how many locks get worked on, changing or rekeying several locks in the same visit spreads that fee across all of them and lowers the effective per-lock cost (HomeGuide, Bob Vila). This is also why changing locks after buying a house is relatively affordable in bulk: rekeying all the locks on a home with 3 to 4 exterior doors runs $150 to $400, replacing them outright runs $200 to $600, and upgrading the whole house to smart locks runs $400 to $1,200+ (HomeGuide).

Prices vary by region, lock brand, and how much labor the job actually needs, so treat the figures above as a planning budget. Get a couple of local quotes, and confirm upfront whether the service call fee, hardware, and any after-hours surcharge are included before booking.