Smart Lock Installation (Retrofit Deadbolt)
Smart lock installation is the retrofit service that swaps an existing residential deadbolt for a Wi-Fi or Bluetooth smart lock — Schlage Encode, August, Yale Assure, or Level Bolt — with door spec verification, app pairing, four to six access codes set, and an outside-the-door function test, starting at $150 per door. A Schlage Encode in the box on the entry-table since last weekend, because the old deadbolt is stuck and the spec sheet on the package mentions backset and bore-hole diameter without explaining what those are. An August Smart Lock that paired to the app on the second try and now binds in the strike plate every time the deadbolt extends. The practical install fails when the door spec, the strike plate, or the Wi-Fi credentials do not line up. Handis verifies the door before the box opens, swaps the deadbolt, pairs the app, programs four to six access codes, and tests the lock from outside the door at the actual distance you will use it.
Service
What Does a Smart Lock Retrofit Install Include?
A smart lock retrofit install is the access-hardware service that replaces an existing deadbolt with a Wi-Fi or Bluetooth smart lock on a standard residential entry door — Schlage Encode, August Smart Lock, Yale Assure, or Level Bolt — starting at $150 per door including door spec verification, app pairing, four to six access codes, and an outside-the-door function test. One preflight decides everything else — does the new lock fit the door prep that is already cut? Door thickness, backset (the distance from the door edge to the center of the bore hole), and bore-hole diameter are the three measurements that have to match the lock's specs. Most residential doors are 1-3/8 to 1-3/4 inch thick with a 2-3/8 inch or 2-3/4 inch backset and a 2-1/8 inch bore hole — and most retrofit smart locks ship to fit that range. The exceptions (oversized backsets, thicker custom doors, non-standard bore holes) are what kills the average DIY install. We verify the measurements before the new hardware comes out of the box.
Door Spec Verification
Door thickness measured with calipers at the deadbolt prep. Backset measured from the door edge to the center of the existing bore hole (2-3/8 inch is standard for residential interior, 2-3/4 inch is standard for entry doors). Bore-hole diameter measured (2-1/8 inch is standard). Strike-plate position checked for alignment with the deadbolt centerline — and if the door has settled or the frame has shifted, the strike plate gets reseated before the new lock goes on. About 10 minutes of preflight that saves an hour of mismatch.
Schlage Encode (Full Replacement, Wi-Fi Built-In)
The most common retrofit — a full deadbolt replacement with Wi-Fi built into the keypad. Works as a stand-alone unit without a hub or bridge. Connects directly to home Wi-Fi and pairs with the Schlage Home app. Supports up to 100 unique access codes, BUILT-In Alexa compatibility, and remote lock/unlock from anywhere. Replaces the entire existing deadbolt; the original key cylinder does not survive.
August Smart Lock (Interior Retrofit)
The renter-friendly retrofit — August replaces only the interior thumb-turn of an existing deadbolt, keeping the original exterior cylinder and key. The Wi-Fi bridge (sold separately) gives remote access; the lock itself uses Bluetooth and a paired phone for auto-unlock. The favorite for renters and anyone who does not want to change the exterior key.
Yale Assure (Full Replacement, Z-Wave or Wi-Fi)
Full deadbolt replacement with multiple radio options — Z-Wave for home hubs (SmartThings, Hubitat, Ring Alarm), or built-in Wi-Fi on the Assure Lock 2 model. Keypad with up to 250 access codes. Pairs well with security systems that already have a Z-Wave hub.
Level Bolt (Fully Invisible)
The smart components live inside the deadbolt body itself — the lock looks completely standard from outside, no keypad, no obvious electronics. Bluetooth and Apple HomeKit compatible. The favorite for design-led homes where a keypad on the front door is not wanted.
App Pairing, Access Codes, Outside-The-Door Test
Every install ends with the lock paired to home Wi-Fi or the hub, four to six access codes programmed (one per household member plus a guest code and a service-provider code), auto-lock delay configured (typically 30 to 60 seconds), and the lock tested from outside the door at the actual distance the household will use it. The lock that works from the hallway but binds from the porch is not installed.
How a Smart Lock Install Works
Six sequential steps from the door-spec preflight to the outside-the-door test — the actual sequence on every Schlage Encode, August, Yale Assure, and Level Bolt retrofit.
Door Spec Preflight
Door thickness measured with calipers (typically 1-3/8 to 1-3/4 inch), backset measured from the door edge to the bore center (2-3/8 or 2-3/4 inch), bore-hole diameter checked (typically 2-1/8 inch). If something will not fit, you hear it before any hardware comes off the door, not after.
Strike-Plate Alignment Check
Strike-plate position checked against the deadbolt centerline before the new lock goes on. Door frames shift seasonally, and the strike that worked with the old deadbolt may not match the new bolt's geometry. Where re-alignment is needed, the strike gets re-chiseled and reseated before pairing the app.
Porch Wi-Fi Signal Test
For Schlage Encode, Yale Assure 2 Wi-Fi, and any direct-Wi-Fi lock, the radio has to reach the home router from the door — and brick or stucco exterior walls block Wi-Fi heavily. Signal tested at the lock location before pairing. Weak signal routes to a mesh node closer to the entry or, on Bluetooth-first locks, the brand's Wi-Fi bridge.
Deadbolt Swap & Seating
Old deadbolt out, new smart lock body seated in the existing bore. Schlage Encode and Yale Assure are full replacements; August retrofits only the interior thumb-turn over the existing exterior cylinder; Level Bolt drops invisibly into the bolt bore. Hand-tight plus a quarter-turn — no impact driver on lock hardware.
App Pair & Four to Six Access Codes
Lock paired to home Wi-Fi or the smart-home hub, four to six unique access codes programmed (one per household member plus a guest code plus a service-provider code), each tagged with a name in the app. Auto-lock delay configured to 30 to 60 seconds so it engages without trapping someone outside.
Outside-the-Door Function Test
Tested from the porch at the actual distance the household will use it — app-unlock, keypad-unlock, manual key where the brand includes one, auto-lock after door close. The lock that pairs in the kitchen but binds from the porch is not installed.
Smart Lock Pricing
Final pricing depends on the lock model, whether the strike plate needs to be reseated for alignment, and whether the door has a non-standard backset or bore that requires a backset shim or a strike-plate chisel-out. Multi-door visits (front + back + garage entry) are cheaper per lock than booking each separately. Request a free estimate for an accurate quote.
Send the smart-lock brand and a photo of the door edge and strike plate — we will confirm the install fit.
Why Handis for Smart Locks
Smart locks look simple in the product photos. In practice we find mismatched backsets that require a separate shim, door frames that have shifted enough since the original strike plate was cut to throw off the alignment of the new bolt, and Wi-Fi signals that pair from inside the house but drop out from the porch. The fix for backset and bore mismatch is verifying the door spec before the box opens — if the new lock will not fit, we tell you before any hardware comes off the door. The fix for a shifted strike plate is reseating it. The fix for porch Wi-Fi is testing the signal at the actual mount location, not on the kitchen counter. Hardware-on-the-front-door is access-sensitive work and every Handis tech is background-screened.
Door verified before the new hardware comes out of the box
Thickness with calipers, backset with a gauge, bore diameter measured, strike-plate alignment checked. The 10-minute preflight that decides whether the install runs clean or stalls on a spec mismatch. If something will not fit, we tell you before any old hardware comes off the door — and we route the door-prep adjustment (a strike-plate chisel-out, a backset shim, a bore-hole expansion) to the right scope so the lock that was selected actually goes on.
Tested from outside the door at real-world distance
The lock that pairs in the kitchen but binds from the porch is not installed. We stand on the porch and test app-unlock, keypad-unlock, manual key (where the brand includes one), and auto-lock from the actual distance the household will use the lock. The strike plate is verified clean — the bolt extends and retracts without binding, the door closes and the auto-lock engages within the configured delay window.
Four to six access codes set at install
One unique code per household member plus a guest code and a service-provider code (the dog walker, the cleaning service, the contractor doing the bathroom remodel next week). Each code is logged with a name in the app so the household knows who used the lock and when. Temporary codes for guests get an expiry date set so they auto-revoke. The household leaves the visit with the lock fully configured, not with a quick-start guide and a weekend of setup ahead.
Wi-Fi tested at the door, mesh recommendation when needed
Schlage Encode, Yale Assure 2, and any Wi-Fi-direct lock has to reach the home router from the door — and brick or stucco exterior walls block Wi-Fi heavily. We test the signal at the lock location with a signal-strength tool before pairing. Where the signal is weak we recommend a mesh node closer to the front entry or, on August and other Bluetooth-first locks, the brand's Wi-Fi bridge (a $40 to $80 plug-in unit that bridges the Bluetooth lock to the home Wi-Fi).
Insured, background-checked, 30-day workmanship guarantee
Every Handis tech is background-screened before any access-sensitive work — and smart-lock installation is the most access-sensitive scope in the trade. If a smart lock we installed binds, loses Wi-Fi pairing because of how we set up the credentials, fails to auto-lock, or the strike plate we reseated drifts within 30 days, we come back and fix it at no extra charge. Manufacturer defects on the lock body or the radio route to the brand's warranty — Schlage, August, Yale, and Level all carry one to two year warranties on the unit.
Estimate
Tell us the smart-lock brand and model, the front door's thickness if you know it (1-3/8 inch or 1-3/4 inch is typical), and the backset if you know it (2-3/8 inch or 2-3/4 inch) — and we will quote the visit.
Customer Reviews
Smart lock installation reviews from real Handis customers.
Schlage Encode on the front door. The tech measured the door, the backset, and the bore hole before he opened the box. Took ten minutes for the swap, twenty more to pair the Wi-Fi and set four codes for our family plus a guest code. Tested the lock from the driveway, not just the hallway. Six months in and we have not used a physical key once.
August Smart Lock on a rental. The tech confirmed I could install over the existing interior thumb-turn without modifying the door — kept the landlord's exterior cylinder and key. Six months later when we moved out, the old hardware was still in a bag in the closet and the lock came off in five minutes. Perfect for renters.
Yale Assure 2 with built-in Wi-Fi. The tech tested the Wi-Fi signal from the door before pairing and said it was borderline. Recommended a mesh node and we ordered one. He came back a few days later for the actual lock install once the mesh was up, and the lock has been rock-solid since. The forward-test saved us a failed pairing.
Three doors in one visit — front, back patio, and garage entry. All Schlage Encode, all paired to the same app, all on the same family code set. The tech tested every door from outside, including the patio door which had a strike-plate alignment problem he had to fix before the deadbolt would extend cleanly. Two and a half hours total.
Smart lock and a Ring Battery Doorbell on the same visit. He installed the lock, paired the doorbell, set up shared codes for our family plus the dog sitter, and we tested everything before he left. Couple of weeks before we left on vacation — worked perfectly the entire trip.
Frequently Asked Questions
Common questions about smart lock installation.