House Rekey Cost: Per-Lock Math and the Rekey-vs-Replace Decision
Rekeying changes the internal pins of your existing locks so old keys stop working and a new key starts working -- the hardware stays, the key control resets. Published 2026 bands put it at $50 to $130 per lock, and the whole-home total is a multiplication problem: lock count times per-lock price, plus the service-call fee. This guide prices the decision honestly: the per-lock math, the whole-home bundle for the typical 4-to-6-lock home, the rekey-vs-replace decision math, when rekeying does not work, hardware grades, and the Orange County turnover angles. The hub covers per-service bands; the automotive guide covers the car-key lane.
Orange County, CA · Updated 2026 · Costs shown as ranges — your quote will vary by contractor and scope
Rekey vs replace vs new install: the three options
Rekey: the pins inside your existing locks are rearranged to a new key -- $50 to $130 per lock in 2026 data. The hardware stays on the door; only the key changes. Replace: the entire lockset is removed and a new one installed -- $100 to $300 per lock including standard hardware. New install: a lock is added where none existed (new door, added deadbolt) -- similar to replace on labor, plus any door-prep work. The choice is a hardware question first and a price question second: sound hardware gets rekeyed, worn or mismatched hardware gets replaced.
The per-lock math
Rekey pricing is per lock, and the per-lock number is the whole decision in miniature. Published 2026 bands: $50 to $130 per lock. What the per-lock number covers: the pin change, the new key or keys, and the service time on that door. What it does not cover: the service-call fee ($35 to $100), which is charged once per visit -- so a single-lock rekey is mostly fee, while a six-lock rekey spreads the fee across six locks. The marginal math favors batching: adding one more lock to the visit costs the per-lock rate, not another fee.
Whole-home bundles: the 4-to-6-lock home
The typical home has four to six keyed locks (front, back, side, garage entry, plus). Published 2026 data for whole-home rekeys: $200 to $500 for 4 to 6 locks. The bundle is where per-lock quotes get negotiated -- many shops quote a flat whole-home number rather than per-lock times six, and the flat number usually lands in the published band. Ask for the whole-home number as one figure and check it against the per-lock math: six locks at $80 per lock plus an $80 fee is $560, so a $400 flat quote is the batch discount working as intended.
When rekeying does NOT work
Rekeying has boundaries. Damaged cylinders: a lock with a broken or seized cylinder cannot be rekeyed -- the hardware has to be replaced. Mismatched keyways: locks from different brands or eras may use different keyways, and one key cannot run all of them -- the rekey can still proceed, but the 'single key for the whole home' goal fails. Worn-out hardware: locks with sloppy, worn internals rekey into locks that still feel worn. High-security or restricted-keyway systems: these rekey, but the key blanks and the process cost more. The visit should start with the assessment, not the pin kit -- a shop that quotes the rekey before looking at the hardware has skipped the actual decision.
Hardware grades: what the deadbolt tier costs
Not all deadbolts price alike, and the grade moves the replace side of the math. Grade 3 (residential basic): the $20-to-$40 hardware-store deadbolt -- functional, thin, the baseline. Grade 2 (residential heavy-duty): the mid-tier with better construction -- the sensible default for exterior doors. Grade 1 (commercial-grade): the $200-plus heavy deadbolt with anti-drill and anti-pick features. Smart locks sit outside the grade system at $150 to $400-plus for the hardware. The rekey decision does not care about grades -- a rekey costs the same per lock on any grade -- but the replace decision does: replacing six Grade-3 deadbolts is a different invoice than replacing six smart locks.
New-homeowner and rental-turnover math in Orange County
Rekey demand in OC runs on turnover. New-homeowner rekeys: the most common trigger -- every prior owner, agent, contractor, and neighbor with a copied key is a reason the $200-to-$500 whole-home rekey is the cheapest security purchase in the transaction. Rental turnover: landlords rekey between tenants -- the per-lock math times the unit count, batched across turns. The OC angle: high turnover in rental-heavy corridors keeps per-lock quotes competitive, while the new-homeowner wave after spring sales season is the annual demand spike. Schedule the rekey for the move-in week -- the fee is the same and the key control starts at day one.
House rekey bands at a glance (2026, informational ranges)
Published 2026 data, restated as ranges: rekey $50 to $130 per lock. Whole-home rekey (4 to 6 locks) $200 to $500. Service-call fee $35 to $100 (once per visit). Full lock replacement $100 to $300 per lock including standard hardware. Lock repair $60 to $150. Grade-3 deadbolt hardware $20 to $40; Grade-1 high-security $200-plus; smart lock hardware $150 to $400-plus. Rekeying beats replacement whenever the hardware is sound -- the hardware you keep is the money you do not spend twice.
Cost bands at a glance, Southern California (2026, informational ranges)
| Item | Typical band |
|---|---|
| Rekey, per lock (2026) | $50 - $130 |
| Whole-home rekey, 4-6 locks | $200 - $500 |
| Service call / trip fee | $35 - $100 (once per visit) |
| Full lock replacement, per lock | $100 - $300 |
| Lock repair | $60 - $150 |
| Grade-3 deadbolt hardware | $20 - $40 |
| Grade-1 high-security deadbolt | $200+ |
| Smart lock hardware | $150 - $400+ |
Frequently asked questions
How much does it cost to rekey a house?
Published 2026 bands: $50 to $130 per lock, and $200 to $500 for a typical whole-home rekey of 4 to 6 locks. The service-call fee ($35-$100) is charged once per visit, so batching all locks into one visit spreads the fee. Flat whole-home quotes usually land inside the published band -- check them against the per-lock math.
Is it cheaper to rekey or replace locks?
Rekeying is cheaper when the hardware is sound: $50-$130 per lock versus $100-$300 per lock to replace. Replace when the hardware is worn, mismatched, or an upgrade is wanted -- the replacement also resets the hardware's age. If the goal is only key control (new home, lost key), rekeying wins on price every time.
Can all my locks be rekeyed to one key?
Usually yes -- if the locks share a keyway. Mismatched keyways (different brands or eras) block the single-key goal even when every lock rekeys fine individually. Ask the technician to check keyway compatibility during the assessment, before quoting -- it is the question that determines whether the whole-home job delivers one key or two.
When does rekeying not work?
Damaged or seized cylinders, badly worn internals, and hardware that is physically failing -- those get replaced, not rekeyed. High-security and restricted-keyway systems rekey at a higher price. The assessment comes first: a shop that quotes the rekey before inspecting the hardware has skipped the actual decision.
Should landlords rekey between tenants?
Key control resets with every tenancy change -- the prior tenant's copied keys are the reason. The per-lock math times the unit count, batched into one visit per turn, is the standard. In high-turnover corridors the quotes stay competitive; schedule the rekey with the turnover, not after the new tenant has moved in.
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