A new lock, properly fitted
We install and replace deadbolts, high-security cylinders, smart locks and gate hardware at homes throughout the Las Vegas valley.
- New deadbolts installed from $85 per door plus the lock
- 12-month workmanship warranty
- Your written price approved before installation
Answered day and night
A Cairn dispatcher answers every day of the year.
Licensed and insured
Employee technicians carry photo ID and a police work card.
Your price comes first
Approve the written price on a tablet before work begins.
The right hardware for each door
A front entry, patio slider and side gate need different hardware. We check the door and recommend a lock suited to its use.
Deadbolt installation
We fit new deadbolts, check the bolt's travel into the frame and reinforce the strike where needed.
Learn moreHigh-security locks
We install higher-grade cylinders and restricted key systems for owners who need greater control over key copies.
Learn moreSmart lock installation
We fit compatible electronic locks, set up access codes and show you how to operate and maintain the lock.
Learn moreGate and sliding door locks
We replace worn gate locks and fit locking hardware for sliding glass doors, including secondary locks.
Learn more
When replacing the lock makes sense
Not every troublesome lock needs replacing. These are the conditions and changes that make new hardware worth considering.
A worn or sticking lock
A key that catches or a cylinder that binds may be worn. We inspect it before recommending repair or replacement.
Damage or corrosion
Damaged internal parts or corrosion can leave a lock operating poorly even after adjustment.
A higher security grade
A basic residential lock can be replaced with hardware built for heavier use and greater resistance to attack.
A different finish or style
Replacing a handle set or deadbolt lets you change the hardware's appearance without replacing the door.
Moving into a home
If the existing hardware is worn or low-grade, replacement gives you a fresh lock and a new set of keys.
Changing to keyless entry
A keypad or smart lock can replace a compatible mechanical lock when you want entry without carrying a key.
Choose the lock that fits the job
ANSI/BHMA Grade 1 is the highest of the three grades, Grade 2 suits residential and light commercial use, and Grade 3 is basic residential.
Standard deadbolts
A mechanical deadbolt provides a separate locking bolt for an exterior entry door.
High-security locks
Higher-security cylinders can add controlled key duplication and greater resistance to tampering.
Keypad locks
Enter a user code instead of turning a key. We show you how to add and change codes after installation.
Lever and knob sets
New lever or knob hardware restores the operation of a worn handle and latch assembly.
Smart locks
Wi-Fi and Bluetooth locks, locks that work with Apple Home, Google Home and Amazon Alexa, and retrofit units that fit over an existing deadbolt.
Gate locks
Outdoor gate hardware needs attention to latch alignment, heat-related movement and dust collecting in the mechanism.
Standard or high-security
Both choices provide a mechanical locking point. The difference is the cylinder, control over duplicate keys and the level of resistance the hardware is designed to provide.
Standard deadbolt
A conventional deadbolt suits a residential entry where ordinary key access and a sound locking bolt meet the owner's needs.
- Standard key duplication
- Basic resistance varies by grade and construction
- Installation from $85 per door, plus hardware
High-security lock
A high-security cylinder is suited to owners who want tighter control over copies and hardware designed for greater resistance.
- Patented keyways can restrict unauthorized copies
- Greater pick and drill resistance by design
- Higher hardware cost, quoted for the chosen lock
The technician checks door compatibility and explains the hardware price before you approve either installation.
We install locks you bought
We install locks you purchased as well as locks we supply. Before starting, the technician checks that the lock fits your door and operates correctly. Customer-supplied locks carry our labor warranty only, not a hardware warranty from Cairn.
- Locks purchased separately are welcome
- Labor warranty applies, not hardware warranty
- Fit and door condition checked before installation
How we fit and test your new lock
A lock needs to fit both the door and its frame. Installation includes checking the dimensions, securing the hardware and testing the finished assembly.
Measure the existing door
We check thickness, backset and bore size, then inspect the frame and existing holes to confirm what hardware will fit.
Fit the lock and strike
We install the hardware and fit a reinforced strike plate with 3 inch screws reaching the wall stud where the door construction allows.
Test the finished door
We check that the deadbolt extends a full 1 inch, the door latches properly and every supplied key works from the intended sides.
Hand over the invoice
You receive an itemized invoice separating the service call, labor and parts, by email or on paper.
What determines the installation price
The final amount depends on the lock and the condition of the opening. The technician inspects the door and existing lock, then puts every charge on the written price before work starts.
Basic deadbolt installation
Labor for deadbolt installation starts at $85 per door, plus the lock. The separate $39 service call fee applies to each visit within our service area.
Hardware selection
A conventional deadbolt, restricted cylinder and electronic lock carry different hardware costs.
Door preparation
Cutting a new bore, correcting alignment or repairing existing hardware can add labor.
Number of doors
We count each lock and opening, including doors that need different hardware or preparation.
Time of service
A $45 after-hours fee applies from 9 PM to 7 AM, on Sundays and major holidays.
Approval before work
The technician presents a written price after inspection. Any change in scope requires a new approval before work continues.
What the installation warranty includes
Our labor warranty and the lock manufacturer's warranty are separate. Here is how each applies after installation.
12 months on workmanship
If a lock we installed stops operating correctly because of our workmanship, we return and correct the installation without charging for that repair. The labor warranty also applies to locks we rekey or repair. It addresses problems caused by our work, rather than every fault that may develop in the door or lock.
Manufacturer’s warranty on hardware
Locks supplied by Cairn carry only the manufacturer’s hardware warranty. Its duration and terms depend on the brand and model. If a qualifying hardware defect develops in a lock we supplied, we handle the manufacturer’s claim. Hardware you purchase yourself is not warranted by Cairn for hardware defects, although our installation labor remains warranted for 12 months.
What is not included
Damage from forced entry, shifting or swelling doors and frames, smart lock batteries, and Wi-Fi or app problems outside the lock are not included. We inspect the issue to identify whether it concerns installation workmanship, the hardware itself or the surrounding door.
Lock brands we work with
Our technicians service mechanical, high-security and electronic hardware from the manufacturers listed below. Compatibility is checked by model and application.
High security
- Medeco
Mul-T-Lock
Schlage Primus
Smart locks
Schlage Encode
Kwikset Halo
Yale Assure
August
Level
We service these brands; this does not indicate manufacturer authorization or dealer status.
“We had a deadbolt installed on our front door in Summerlin. The technician checked the door measurements first and explained how the strike plate would be reinforced. He tested the lock with us before leaving, including every key. The invoice separated the labor and hardware costs.”
Grace D.
Questions about fitting a new lock
These are the details worth checking before choosing a replacement, particularly when the door or existing hardware is older.
Call (702) 000-0000All questionsCan you install a deadbolt on a door that does not have one?
Yes. We measure the door and determine whether new holes need to be bored for the deadbolt and strike. Any additional preparation is included in the written price before the cutting begins.
Should I replace my lock or just have it rekeyed?
Rekeying is usually suitable when the existing lock is in good condition and you only need different keys. Replacement is the better choice for damaged, worn or low-grade hardware, or when changing to a different type of lock.
Can you install matching locks that use one key?
We can key compatible locks alike when their cylinders use the same keyway. Different brands and keyway designs do not always share a key, so we check compatibility before selecting hardware.
Will a new lock fit the holes already in my door?
That depends on the door thickness, backset, bore size and lock design. We measure these before installation and explain whether the existing opening can be used or additional work is needed.
Can you replace the lock on a rental property?
Yes, with approval from the owner or property manager. Renters need identification and a lease or confirmation from the landlord, and the technician verifies authorization before changing the hardware.
Can you put a smart lock on a sun-facing front door?
Yes, a compatible smart lock can be installed on a sun-facing door. Direct sun on a west or south facing door can shorten battery life and fade keypads. Check the batteries twice a year.
Can I schedule several lock replacements at once?
Yes. Planned installations are scheduled Monday through Saturday, 7 AM to 6 PM. Tell us how many doors are involved and what hardware is installed so we can prepare for the visit.
Get the right lock on your door
We install locks throughout the Las Vegas valley. Call for an urgent replacement, or send a request for planned work and receive a reply within one business day.