Smart lock installation cost: DIY versus a locksmith

A smart deadbolt has one price on the shelf and a different one by the time it is working on the door. Very little of the gap is the lock. It is whether the door already has the right holes in it, whether the old hardware comes out without an argument, and whether the person holding the screwdriver owns anything else.

The figures below are ranges drawn from published locksmith rate cards and retailer installation listings rather than quotes gathered first hand. They move with your city, with the time of day and with how far somebody has to drive, so treat them as the shape of the decision rather than a bill. The lock itself is a separate line, commonly somewhere between roughly $100 and $350 depending on connectivity and finish, and also subject to the same caveat.

The case where installation costs nothing

Most American exterior doors built in the last few decades are prepped the same way: a 2-1/8 inch cross bore through the face, a 1 inch edge bore for the bolt, and a backset of either 2-3/8 or 2-3/4 inches from the door edge to the center of that bore. If your existing deadbolt is an ordinary tubular one sitting in that prep, a smart deadbolt drops into the same holes.

That job needs a number 2 Phillips screwdriver and roughly twenty minutes, most of which is spent aligning the tailpiece and reading the app. The lock arrives with its own mounting plate, strike and screws. Nobody needs paying, and the honest answer to the cost question is an evening. The step by step of that swap is a separate piece of reading.

Everything that follows is about the doors where that is not true.

What a first DIY install costs in tools

If the door has no deadbolt prep at all, the tool list grows quickly and stops being a rounding error. Rough purchase ranges, again variable by market and season:

• A pack of 3 inch strike screws, low single digits. The best value in the whole job, and worth buying even on a straight swap.
• A 2-1/8 inch bi-metal hole saw plus a 1 inch spade or auger bit, usually low tens of dollars together.
• A self-centering lock installation jig, mid tens of dollars. It clamps to the door edge and holds the hole saw square, which is the difference between a bore you can live with and one you cannot.
• A sharp 1 inch wood chisel and a mallet for mortising the latch face and the strike, low tens.
• A cordless drill, if there is none in the house. This is the big line, typically the low hundreds for one worth keeping, and considerably less for a bare tool if you already own the batteries.

Buying all of that to fit one lock is close to what a tradesperson would charge to do the same job, with the difference that you keep the tools. Buying it to fit four locks around a house is obviously sensible. Before spending anything, read what cutting a fresh bore involves, because it is the one step in this whole subject that cannot be undone.

What a locksmith or handyman charges

A residential locksmith quote is usually built from two parts. There is a service call or trip fee for turning up, frequently advertised in the tens of dollars and sometimes folded into the labor if work goes ahead. Then there is the labor itself, quoted either per lock or by the hour with a one hour minimum.

For a straight swap on a door that is already prepped, published rates tend to land somewhere between roughly $50 and $150 per lock, with the trip fee either included or added on top. Big-box retailers and a few lock brands sell an installation service at a flat published price in a similar band, which trades a little money for a number you can see before anybody arrives. Evening, weekend and emergency call-outs are quoted at a multiple of the daytime rate, and an emergency lockout call is a different market again.

A general handyman is often cheaper by the hour than a locksmith and perfectly capable of a swap on prepped hardware. What a handyman may not carry is the lock-specific tooling, which matters the moment a new bore or a mortise case is involved. Ask what is in the van before booking.

The jobs where paying somebody is the cheaper answer

These are the situations where the DIY route usually ends with a second, more expensive phone call.

• A new bore in a steel or fiberglass door. The skin work is unforgiving, a wood hole saw will not survive it, and a slab that gets ruined costs many times the labor you were trying to save.
• A mortise case rather than a tubular bore, common in pre-war apartments and brownstones. The routes through that problem are narrow and worth understanding before you commit, which is the subject of the guide to smart locks on mortise doors.
• Multipoint hardware on a French or patio door, where the bolt you can see is driven by a gearbox inside the stile and the replacement parts are proprietary.
• A fire-rated door, typically the unit entry door in a condo or apartment corridor. Cutting new holes can affect the rating and may run into building rules or local code, so check with your building management and your local code official before anything touches that door.
• A door that binds, drags on the frame or has a jamb visibly out of square. No lock fixes that, and fitting one to a door in that state produces a bolt that will not throw cleanly.

The costs nobody puts in the budget

• Longer strike screws and, on an older frame, a reinforced strike plate. A few dollars that change the door’s resistance far more than the lock upgrade did.
• A thick-door or spacer kit if the door is above the standard 1-3/4 inches. Some brands include one, some sell it separately, and the lock will not close up properly without it.
• The bridge or hub, if the model needs one to reach your phone from away, plus an outlet within range of the door.
• Batteries. The cells in the box are frequently a courtesy set, and a decent set of AA alkaline or lithium cells is a small recurring line rather than a one-off.
• The rescue visit. A job abandoned halfway is the most expensive version of all of this, because the tradesperson now has to deal with a chewed screw head or an oversized bore before starting the work you called about.

That last one is worth taking seriously, because the stall almost never happens at the interesting part. It happens on the first two screws, which have been painted over four times and are turning in place. What to do about old hardware that will not come off is its own short discipline, and reading it first is free.

How to compare two quotes

Ask these before agreeing to anything, ideally on the phone rather than on the doorstep:

• Is the trip fee included in the quoted price or added to it?
• Is the labor per lock or per hour, and what is the minimum charge?
• Am I supplying the lock, and if you supply it, what is the price of the hardware on its own?
• Does the price include aligning the strike and testing the bolt on a closed door, or does it stop at fitting?
• What happens to the price if the door turns out to need a new bore?
• Is the labor warranted, and for how long?

A shop that answers all six without hesitating is quoting from a rate card. One that will only talk about it at the door is not.

A ninety second test for which route you are on

Stand at the door and answer these.

• Is there already a deadbolt sitting in a round bore above the handle?
• Do the two interior screws turn freely, with clean heads and no paint bridging them?
• Is the door ordinary thickness, wood or wood-core steel, and does it close without being pushed?

Three yes answers and you are looking at a screwdriver and an evening. Any no, and it is worth the price of a phone call to find out what the job really is before the old lock is off the door and the house is open.

Common questions

How much does it cost to have a smart lock installed?

On a door already prepped for a deadbolt, published rates commonly sit between roughly $50 and $150 per lock in labor, with a trip fee either folded in or added. Drilling a new bore, converting a mortise case or working on a metal door pushes it well above that, usually into hourly billing. Local pricing varies enough that two quotes in the same city can differ by half.

How long does a smart lock take to fit?

Twenty to thirty minutes for a straight swap, including the app setup and a first test of the bolt against the strike. An hour or more if the strike needs moving. Half a day, and a different skill set, if a new bore is being cut.

Will the retailer install the lock I buy from them?

Several big-box retailers and a few lock manufacturers sell installation as an add-on service at a flat published price, sometimes through a third-party contractor network. The advantage is a fixed number agreed in advance. The limits are worth reading: these services usually assume an existing prepped door and quote extra, or decline, for drilling and non-standard doors.

Is a locksmith worth it for a simple swap?

Rarely, if the door is prepped and the screws are cooperative. The value of a locksmith is in the awkward doors and in the fact that a professional carries the parts to finish the job the same afternoon. Paying one to change a prepped deadbolt is buying convenience, which is a reasonable thing to buy, but not a technical necessity.

The short version

On a standard prepped door the installation is genuinely free and takes an evening, which is the position most readers are in. Paying a locksmith for that same swap tends to run in the region of $50 to $150 per lock in labor plus a trip fee, and buys convenience rather than capability. The money only becomes unavoidable when the door needs a new bore, has a mortise case, is steel or fiberglass, carries multipoint hardware, or is fire-rated, and in the last of those the building’s rules matter as much as the price. Budget separately for longer strike screws, batteries and a bridge if the lock needs one. And get the quote before the old lock comes off, not after.