Changing a door lock typically costs $50-$300 per door, with a national-style average near $150 for a standard replacement and installation. The change door lock price depends on whether the job is a rekey or full hardware replacement, the lock type, labor, and access or security upgrades.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Rekey existing lock | $20 | $35 | $60 | Per cylinder; hardware remains |
| Basic lock replacement | $50 | $150 | $300 | One door, standard deadbolt or knob |
| Smart lock replacement | $150 | $350 | $700 | Hardware and installation |
| Emergency locksmith visit | $100 | $200 | $400+ | After-hours or urgent service |
What a standard front-door lock change costs
For one exterior door, a basic deadbolt or keyed entry set usually costs $50-$150 for the lock and $50-$150 for installation. A typical total is $100-$250 when the existing holes and door edge fit the new hardware. Replacing a knob and deadbolt together may bring the bill to $150-$350, depending on the product and labor.
Prices assume a standard residential door, ordinary access, and a midrange lock. A basic grade-3 deadbolt generally costs $20-$60; stronger grade-1 or grade-2 hardware often costs $50-$180. Assumptions: U.S. residential pricing, standard materials, one door, normal access, and no frame repair. A straightforward replacement is usually far less expensive than a smart-lock upgrade or door modification.
How hardware, locksmith labor, and service fees add up
Quotes may list the lock separately from installation, or combine them into a flat rate. Ask whether the price includes the service-call charge, removal of old hardware, and adjustment of the strike plate. Labor for an uncomplicated lock change is often 30-60 minutes; difficult fitting or multiple doors can add time.
| Quote component | Typical price | What changes the charge | Common billing basis |
|---|---|---|---|
| Basic deadbolt or knob | $20-$100 | Brand, grade, finish | Per lock |
| Smart lock hardware | $100-$400 | Keypad, app, Wi-Fi features | Per lock |
| Locksmith labor | $50-$125 | Fitting, door count, location | Per hour or flat rate |
| Service call | $30-$100 | Travel and minimum charge | Per visit |
| Old lock removal or disposal | $0-$40 | Bundled or separately listed | Per door |
For example, 1 hour at $75-$125 per hour adds $75-$125 before hardware or a separate trip fee. Get an itemized quote so a low advertised labor rate does not hide a large minimum charge.
Rekeying versus replacing the whole lock
Rekeying changes the pins inside a compatible cylinder so old keys stop working, while keeping the lock body and exterior hardware. It commonly costs $20-$60 per cylinder, plus a possible $30-$100 service call; multiple locks keyed alike may lower the per-lock charge. A complete replacement makes more sense when the lock is damaged, outdated, incompatible with the door, or lacks the desired security features.
For three working locks, rekeying may total $90-$250 with the visit included, compared with roughly $250-$600 to replace all three with standard hardware and installation. Rekeying is not always possible for specialty or restricted-key systems, and a worn lock may still need replacement. When the hardware works and only key access must change, rekeying is often the lower-cost option.
How long the locksmith visit takes and what it may cost
A simple swap often takes 20-45 minutes per door. A locksmith may need 45-90 minutes when the latch needs adjustment, the door is misaligned, or new holes must be drilled. Rates commonly run $50-$125 per hour, but many residential providers use a minimum charge or a flat fee instead of billing by the minute.
Replacing several locks during one visit can reduce travel charges per door, although each lock still adds hardware and installation cost. Urgent, late-night, weekend, or holiday calls can add $50-$200 or more. Confirm the total arrival-to-completion charge and any after-hours premium before dispatch.
Why lock grade, door fit, and smart features change the quote
Hardware selection is a major price driver: basic keyed knobs and deadbolts cost less than reinforced or electronic models. Smart locks commonly add $100-$400 per unit before installation, and models needing a new deadbolt opening or door-edge adjustment can add $50-$200 in labor. A keyless model may also require batteries, setup, and phone or Wi-Fi configuration.
Door condition matters as much as the lock. A standard 1⅜- to 1¾-inch-thick door with matching bore and backset usually accepts common replacement hardware. A nonstandard thickness, damaged jamb, or misaligned strike may add $50-$250 for fitting or repair. A reinforced strike plate or longer screws typically add $10-$40 in parts. Measure the door and identify the existing lock before comparing installation quotes.
When city location or urgent timing raises lock-change prices
Labor and service-call rates tend to be higher in dense, high-cost metro areas than in rural markets. As a broad budgeting adjustment, urban quotes can run 10%-30% above a national-style midpoint, while rural quotes may be 5%-15% lower when the provider is nearby. Long travel distances can erase that rural savings through a trip fee.
Emergency work can change the total more sharply than region alone. A daytime standard replacement may fall near $100-$250, while a late-night lockout followed by replacement can reach $200-$500 or more. For a nonurgent job, compare local providers using the same lock grade and stated service-call terms.
Ways to lower the price without weakening the door
Keep the existing lock body when it is in good condition and a rekey will meet the security need. If replacement is necessary, choose a standard keyed deadbolt or knob rather than paying for app features that will not be used. Replacing multiple locks in one scheduled visit can spread the trip charge across more doors.
Before the appointment, share photos of the lock, door edge, and strike plate, and provide the door thickness if known. Ask whether the quote includes hardware, labor, tax, and old-lock removal, and request approval before any drilling or frame repair. Compare at least two itemized estimates with matching product grades. Controlling the hardware choice and confirming the scope in advance are the most reliable ways to avoid surprise charges.