Can You Change the Lock on an Exterior Cellar Door in 2026? Missouri Property Rights
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Understanding Your Property Rights After Purchase in 2026
When you purchase a home, you gain complete ownership and control of the property, including all entrances and access points. This fundamental principle of property law applies whether you're buying in Missouri or anywhere else in the United States. However, the transition from previous owner to new owner can sometimes create complications, especially when former residents believe they still have rights to stored items or access.
In your situation, discovering that the previous owner's son had a key to your cellar and was entering your property without permission raises serious concerns about security and trespassing. The fact that he felt comfortable letting himself in suggests this was a long-standing practice that needs to change immediately now that the property has new ownership.
Missouri Trespassing Laws and Your Legal Position
Missouri law is clear on this matter. Once you own the property, you have the exclusive right to control who enters it and who accesses various parts of it. Under Missouri Revised Statutes Section 569.140, trespassing occurs when someone enters or remains on another person's property without permission. The previous owner's son entering your cellar without your consent, regardless of his historical access or stored items, constitutes trespassing.
The key point here is that prior use does not create ongoing rights. Just because the previous owner's family used the exterior cellar door for years doesn't mean they retained any legal right to continue doing so after you purchased the home. Property rights transfer completely to the new owner.
Missouri also recognizes the concept of adverse possession, but this requires continuous, open, and uninterrupted possession for at least ten years. A family member occasionally retrieving stored items doesn't meet these requirements.
Your Legal Right to Change the Lock
You absolutely have the legal right to change, modify, or remove any locks on your property. This includes exterior cellar doors, basement doors, side gates, or any other access point. There is no legal obligation to maintain existing locks or to provide previous occupants with continued access.
Here's what you should do immediately:
- Change or rekey the cellar door lock as soon as possible
- Ensure all exterior doors have functioning locks
- Consider upgrading to heavy-duty deadbolt locks for added security
- Document the incident with the previous owner's son
- Send a written notice to the previous owner informing her that family members are no longer permitted on the property
When changing locks, you have several options. You can hire a locksmith, which typically costs $75-$200 per lock, or you can change the locks yourself if you're handy. Many homeowners use replacement door lock sets that are relatively easy to install.
Handling the Previous Owner's Stored Items
The previous owner's son claimed his family had "things" stored in the cellar. This complicates the situation slightly but doesn't change your rights. Before changing the locks, you should:
Take inventory of what's actually in the cellar. Walk through and document any items that appear to belong to the previous owners rather than being part of the property or debris left behind.
If there are legitimate family items, you have several options:
- Contact the previous owner directly and offer a specific timeframe for retrieval (usually 7-14 days)
- Require that retrieval happen only when you're present
- Charge a reasonable storage fee for items left beyond the closing date
- Box up smaller items and offer to deliver them or have them picked up at a neutral location
- For items the previous owner refuses to retrieve, consult about abandoned property procedures
Document everything in writing. A simple email or certified letter stating that any remaining items must be removed by a specific date protects you legally. Keep copies of all correspondence.
Preventing Future Access and Trespassing
Beyond changing the lock, take additional steps to secure your property and make your boundaries clear:
Physical security measures are your first line of defense. Reinforced strike plates and security hinges make it harder for someone to force entry. Consider installing a video doorbell or security camera pointing at the cellar entrance to document any attempted access.
Send written notice to the previous owner stating that the property is now your exclusive residence and that family members are not permitted to enter without explicit permission and your physical presence. Keep a copy of this letter for your records. This establishes a clear boundary and helps prove trespassing if it occurs again.
If the previous owner's son or other family members attempt to enter again after you've changed the locks and provided written notice, contact the Missouri police non-emergency line to report trespassing. Having documentation of your previous warning strengthens any police report.
Comparison: What to Do vs. What Not to Do
| Action | Should You Do This? | Why |
|---|---|---|
| Change the cellar door lock | Yes, immediately | It's your right and necessary for security |
| Allow previous owner to keep a key | No | This maintains unauthorized access and liability |
| Set a deadline for item retrieval | Yes, in writing | Protects you legally and sets clear expectations |
| Confront the previous owner's son aggressively | No | Can escalate the situation; keep it professional |
| Throw away stored items immediately | No, give notice first | Could create liability; reasonable notice period is better |
| Document attempted access | Yes, always | Strengthens any legal action or police report |
Key Takeaways
- You have complete legal right to change any locks on your property in Missouri
- Previous owners and their family members have no continuing legal right to access your home after you purchase it
- Unauthorized entry constitutes trespassing under Missouri law
- Give written notice with a deadline for retrieving any legitimate stored items
- Install security measures and document any further unauthorized access attempts
- Contact local police if trespassing occurs after you've made your boundaries clear
- Consult an attorney if the situation escalates or becomes threatening
Frequently Asked Questions
Do I need to let the previous owner retrieve items from my cellar?
You're not legally required to, but it's a practical courtesy to set a reasonable deadline (7-14 days) for retrieval. Send written notice stating a specific date and time for pickup. After that date, you can dispose of items or charge storage fees. This approach minimizes conflict while protecting your property rights.
What if the previous owner claims she didn't know her son was entering?
This doesn't change your rights or legal position. The previous owner is responsible for ensuring family members understand they no longer have access rights. By sending her written notice, you've made your expectations clear. Any future trespassing is then clearly unauthorized.
Could the previous owner sue me for changing the lock?
No. You own the property and have the absolute right to control access. There's no legal basis for a lawsuit. The previous owner had a reasonable opportunity to retrieve stored items when the property was being inspected and closed. Any items left behind after closing are considered abandoned unless she specifically made arrangements otherwise during the transaction.