How keys spread during a remodel
A small repair might involve one person for an afternoon. A kitchen remodel, a roof replacement after a storm or a full renovation can involve a dozen different trades over many weeks. The general contractor typically holds a key, and may make copies for the project manager, the lead carpenter and the cleanup crew. Subcontractors such as electricians, plumbers, painters, tile setters and flooring installers may each be given access, either with a key or through a lockbox.
Often the homeowner is not present during the day. Crews arrive early, work, and leave, locking up as they go. That arrangement depends on trust and on keys moving between people. Keys get left in trucks, passed to helpers, copied for convenience or placed in a lockbox with a combination that several people know.
At the end of the job, the homeowner usually gets a key back, but not always all of them. A contractor who says that everything has been returned may sincerely believe it, while a helper still has a copy in a glove box. This is not a criticism of builders. It is simply the way access spreads on a busy job site, and it is the reason that a rekey after a renovation is sensible. The broader audit approach is described in who has copies of your keys.
Plan access before the job starts
The best time to think about keys is before the first day. Decide how contractors will enter. Will you be home to let them in each day? Will you give a key to one responsible person? Will you use a lockbox? Each option has tradeoffs, and the choice affects what you will need to do afterward.
If you give a key, give it to one named person, usually the general contractor or project manager, and ask that nobody make copies. Record the date and the person's name. Ask them to confirm in writing that they will return the key at the end. If the contractor needs to give access to subcontractors, ask that they do so by being present or by a controlled process, not by handing out copies.
If you use a lockbox, change the combination whenever the group of people who know it changes, and again at the end of the job. Be aware of the limitations of lockboxes: the combination can be shared casually, and the box can be tampered with. The page on lockbox and agent access explains what to consider. For longer jobs, consider using only one door for access and keeping other doors secured from the inside.
Protect valuables and sensitive areas during the work
Remodels often require clearing rooms, and belongings end up stacked in places that were not meant to hold them. Before the job, move jewelry, cash, medications, firearms stored lawfully, important papers and electronics to a locked room or off site. A locked closet or a safe is not a substitute for judgment about what remains in the house while many people pass through.
Consider designating one room as off-limits to crews, with its own lock that is not part of the project. This is easier if the door has a separate key. If a door needs to remain keyed alike with the others, consider adding a temporary hasp or lock with a key you control.
Take photographs of the condition of the house before work begins, including doors, locks and frames. This helps if damage occurs. It also helps you remember what the hardware looked like if a door gets replaced or modified during construction. A long project can change door frames and hardware, and you may want a technician to check alignment and function at the end.
Closing out the job: collect and confirm
When work is finished, collect keys in person. Ask the contractor to list everyone who held a key and to return all of them. Ask about lockbox keys, spare keys and any copies made. Write down what was returned and by whom. A signed note from the contractor stating that all keys have been returned, and that no copies remain with subcontractors, is a useful record.
Check that the locks still work. Construction can loosen hardware, strike plates and frames. A door that was removed and rehung during the project might not latch properly. A deadbolt that sticks may signal alignment problems. Do not ignore these; a door that does not latch fully can be as bad as one that is unlocked. The article on door frame and jamb problems in humid climates explains why frames shift.
Look at the house for signs that something was altered. A new lock that you did not request, a drilled hole you did not expect or a changed latch should be raised with the contractor immediately. Keep final payment and sign-off until you are satisfied. A small checklist is useful: all keys returned, all locks working, all doors closing, all openers and keypads reset.
When rekeying is the clean answer
You can never prove that a key was not copied. Rekeying removes the question. If a contractor held keys for weeks, or if several subcontractors had access, or if a lockbox combination was widely known, rekeying is a sensible response. The work is quick, the cost is modest compared with the project you just completed and the result is certainty.
The case for rekeying is strongest in particular situations. The job was long. The crew was large or changed often. You were not home during the day. Keys or lockboxes were left with workers you do not know well. A key went missing at any point. The renovation involved doors or locks, such as new door installation, since new hardware may have come with its own keys that were handled by installers.
If you are weighing a rekey against new hardware, the guide on rekey versus replace explains the difference. In many cases, a renovation also reveals that older locks are worn or corroded, and the technician can advise whether to rekey or replace as part of the same visit. Quotes are given by phone only, and a service call charge applies, explained before dispatch.
Garage openers, gate remotes and alarm credentials
Keys are not the only access tools that crews receive. Contractors may be given a garage door remote or a gate transmitter, a keypad sequence for the garage or front door and an alarm credential so they can enter without triggering the system. These are easy to forget at the end of a job.
Reset or change each of them. Erase and reprogram garage remotes following the manufacturer's directions. Change keypad sequences. Update alarm credentials or ask your monitoring company to remove temporary users. If a contractor used a smart lock credential, delete it from the app. The page on smart lock guest access describes how to handle temporary access in a clean way.
Do not work on garage door springs or the counterbalance system yourself. They hold high tension and are dangerous. If a renovation changed the garage or its door, have a trained professional check the system rather than trying to adjust it.
Roof, storm and insurance repair jobs
After a hurricane or heavy storm, many homeowners hire contractors quickly, sometimes in a hurry and sometimes for emergency tarping or board-up. In those circumstances, due diligence can slip. People may give out keys to someone they met that week, and a crew may arrive with a different group every day.
Be careful with unfamiliar contractors who ask for a key before a contract is signed. Check that the person you are working with is who they say they are, and verify credentials with the appropriate state and local authorities. A contractor who knocks on doors after a storm is not necessarily dishonest, but caution makes sense. Do not hand over house keys to anyone you have not verified.
For insurance repair work, the adjuster, contractor and sometimes a mitigation company may all need access. Keep a list of who entered and when. When the work is done, rekey. The page on the after-the-storm lock and door inspection covers what to look at when doors and frames have been stressed by weather.
Rental and investment properties
Landlords and investors often use contractors for turnovers and repairs. If the property is occupied, the tenant may be uneasy about strangers having keys. Be transparent with the tenant about who will enter and when, and follow the notice rules in the lease and the law.
Keep a log for each unit. Record each contractor, the days they were present and the key or access method used. At the end of a major project, rekey the unit and update the log. The guide on landlord key control explains how to organize records so they stay usable.
If you manage many units with the same crews, consider a controlled sign-out system, in which keys are held in a locked cabinet and signed out each day. That reduces the number of keys in circulation. For vacant units, a lockbox with a changed combination at the end of the job is a lower-cost option, but a rekey provides a stronger reset. A technician can help you choose a method that suits the number of doors and the frequency of work.
A closing checklist you can print
A simple checklist helps because the end of a renovation is busy and attention drifts to the new kitchen or roof. Keep it short. First, list every key, lockbox, remote and keypad credential that was given out. Second, mark each one returned, reset or still outstanding. Third, test every exterior door from outside and from inside, with the door fully closed.
Fourth, inspect doors and frames for damage or changes. Look at strike plates, latch alignment, weatherstripping and the gap around the door. Construction dust in a lock can cause sticking, and a technician can clean or replace a cylinder if needed. Fifth, decide whether to rekey, based on the length of the job and how many people had access.
Sixth, update your own records: the key sheet, the alarm credentials, the smart lock app and the garage remotes. Seventh, keep documents together: the contract, the sign-off, the contractor's key return statement and the receipt for any lock work. If a problem appears later, these papers help.
If you are uneasy about anything on the list, do not wait for a convenient moment. Unknown access is a risk that costs nothing while it sits quietly, and then costs a lot if it is ever used. A rekey ends the uncertainty and lets you enjoy the finished work without a lingering worry about who else can walk in.
What to have ready when you call
Tell the technician what kind of work was done, how long the project lasted and how many people had access. Mention whether keys, lockboxes, remotes or keypads were involved. Say how many exterior doors you have and the types of locks. If doors were replaced or modified during the work, mention that too.
A technician will ask for identification and proof that you control the property. A deed, tax bill, utility bill or lease with landlord authorization is typically accepted. Have the paperwork nearby. The guide on proof of ownership for locksmith service describes the usual documents.
Quotes are given by phone only. A service call charge applies and is explained before dispatch. Straightforward rekeys can often be described on the call, and more complex hardware or door problems may need an on-site visit first. When your project is finished and you are ready to take your keys back, call and describe the house.
Questions people ask
Do I need to rekey after every contractor visit?
Not necessarily. A one-time repair visit where you were present and no key was handed over rarely calls for it. Longer projects, large crews, lockboxes or keys left with workers are different. The more people who had access, and the less you can verify what happened to the keys, the stronger the case for a rekey.
What if my contractor says all keys were returned?
That may be true, but you cannot confirm that no copies were made. Ask for a written statement listing who held keys and confirming none remain. If the project was long or involved many subcontractors, a rekey removes any doubt, and the work is usually quick compared with the project itself.
Should I give a contractor a key or use a lockbox?
Each has tradeoffs. A single named key holder is easier to track but may lead to copies. A lockbox is flexible but the combination spreads. Whichever you use, record who has access, change the combination when people change and reset everything at the end of the job. Being home to open the door is the most controlled approach.
Can a locksmith tell if a key was copied?
No. A key does not record how many copies exist. Only a restricted keyway system with authorization records produces such a trail. For ordinary keys, the practical response is to rekey when you cannot account for copies. That makes every old key useless regardless of how many were made.
What about contractors who knock on doors after a storm?
Take care. Verify identity and credentials with the proper state and local authorities before signing anything, and do not hand over keys to someone you have not verified. A legitimate contractor will understand the caution. If a key was given and you are uneasy, rekeying after the work is a sensible precaution.
How is a post-renovation rekey quoted?
Quotes are given by phone only. Describe the number of doors, the locks and whether the work changed any hardware. Simple jobs can be explained on the call, while more complicated ones need an on-site visit. A service call charge applies and is explained before dispatch. Have proof that you control the property ready, then call.
Describe the situation by phone and we will tell you what the job involves. Quotes are given by phone. Jobs that cannot be quoted without seeing them need a technician on site, and the service call charge is explained on the phone before anyone is dispatched.
Related pages
Choosing between a full rekey and targeted changes
After a renovation, the right response depends on how much access the crew had. If a small team worked on one room for a day or two, with supervision, a targeted change might be enough: rekey the entry door and any room that held valuables. If a crew had keys for weeks, a broader approach makes more sense, because it is hard to know where copies went or how they were handled. Ask the contractor to list every key, code or remote they received in writing, as a written list is easier to check than a remembered conversation.
Consider the people involved. A single contractor you know and trust, working alone, is a different situation from multiple subcontractors cycling through. Ask the contractor who received keys, whether any were copied and whether they have all been returned. Their honest answer is useful, but it does not replace the reliability of a fresh key set. A rekey removes the question altogether. If the work involved a locked room, check that nothing was moved or left open, and look for tools or materials that might hide a copy of a key.
Think about interior doors too. A home office, a safe room or a closet holding documents might deserve its own rekey. Ask about garage entries and side gates as well. We explain the scope and any quote before work begins, and we check ownership or authority before changing any lock. Please call us to confirm availability and tell us which doors the crew used. Keep your own record of the job, including dates, crew names if you know them and which doors were used, to help if a question comes up later.