Leaving your house empty for three months requires much more preparation than a typical vacation because small problems have enough time to become expensive repairs if nobody is checking the property. Three months is long enough that the usual pre-trip checklist doesn’t really cut it anymore. A weekend away and a season away are two completely different situations, and treating them the same is where most of the expensive mistakes come from.
We’ve walked into enough homes after a long absence to know exactly what tends to go wrong, and more importantly, what almost never goes wrong when the right prep gets done ahead of time. Here’s what we’d actually walk a homeowner through before they lock up for three months.
Key Takeaways
- A three-month absence needs more preparation than a normal vacation.
- Have the HVAC checked before leaving, especially during Arizona summer.
- Decide whether the main water supply should remain on or be shut off based on the home’s systems.
- Check irrigation, landscaping, drainage, and exterior conditions before departure.
- Make sure security and monitoring systems have appropriate backup plans.
- Arrange consistent home watch services instead of relying only on occasional check-ins.
What Does a Professional Home Watch Service Check?
A week or two away is forgiving. Most homes can coast through that without much prep at all. Three months is long enough for small problems to become serious ones, and long enough that “someone will notice eventually” isn’t a real plan. A slow leak, a failing AC unit, a pest issue that started small- all of these have plenty of time to turn into a real repair bill if nobody’s checking the house regularly.
This is exactly the kind of stretch where consistent, in-person oversight matters most, not because something is guaranteed to go wrong, but because if it does, catching it in week one instead of week ten makes all the difference.
What Home Systems Should You Check Before Leaving for Three Months?
The HVAC system, water heater, and other essential home systems should be checked before leaving for three months because they’ll continue operating even while the house is empty. We usually suggest raising the thermostat to somewhere in the mid-to-high 80s instead, which protects the interior without running the system at full comfort levels the entire time. Before leaving, it’s worth having the unit serviced, since a system already showing early signs of trouble is far more likely to fail outright over three months than over a shorter one.
Water heaters deserve a look too, especially older units. A slow tank leak that would get caught quickly in an occupied home can run undetected for weeks in an empty one. If the unit is old enough that replacement is on the horizon anyway, three months away is not the time to gamble on it holding up.
Should You Shut Off the Water Before Leaving for Three Months?
In many cases, shutting off the main water supply is the safest option for a three-month absence, provided irrigation or pool equipment doesn’t rely on the same line. It removes an entire category of risk, no supply line failures, no washing machine hose bursts, no slow leaks building up over a season with nobody around to notice.
If irrigation or pool equipment does depend on that line, it’s worth mapping out a separate plan so landscaping doesn’t suffer while the main line stays off. Either way, we’d still recommend having someone check the water meter periodically during the absence, since even a shut-off system benefits from confirmation that nothing’s moving that shouldn’t be.
How Should You Prepare for Power Outages While You’re Away?
Power outages can happen at any time during a three-month absence, so it’s important to have backup plans for security systems, monitoring devices, and other critical equipment. We always ask homeowners whether critical systems, security, any monitoring equipment, and refrigeration, if it’s staying on, have battery backup, because losing power for even a day can undo a lot of careful prep if nothing’s set up to handle it.
For longer absences, we also talk homeowners through whether a generator makes sense, particularly for areas with a history of extended outages. It’s not necessary for everyone, but for a home sitting empty for a full season, it’s worth the conversation.
What Exterior Maintenance Should You Do Before Leaving?
Before leaving for three months, make sure your landscaping, irrigation system, drainage, and exterior are prepared to handle the season without daily attention. We check irrigation timers and zones before a long absence starts, since a single failed valve can undo years of established landscaping over a season, not just a few weeks.
Exterior maintenance matters too. Overgrown trees, debris buildup near drainage, and anything loose that could become a problem during a storm should all get addressed before departure, not left for whenever someone happens to notice.
Who Should Have Access to Your Home While You’re Away?
Before leaving for an extended period, decide who will have access to your home and how they’ll respond if maintenance or emergencies arise. Contractors, landscapers, pool service, all of it needs coordinating so nothing falls through the cracks over three months. It’s also worth confirming that security systems and smart locks have battery backup in case of a power outage, since some of these fail into an insecure state depending on how they’re wired.
Why This Is Exactly What Home Watch Exists For
Home watch services are designed for long absences by providing regular inspections that help identify problems before they become costly repairs. A three-month absence is precisely the scenario the entire industry was built around, not a quick drive-by to confirm the house is still standing, but consistent, in-person checks that catch small issues before they become expensive ones.
A good Arizona home watch services provider checks HVAC function, plumbing fixtures, the water meter, exterior conditions, and security systems on every visit, not just a general glance around the property. For an absence this long, we typically recommend increasing visit frequency compared to what might be reasonable for a shorter trip, since more time away means more time for something small to go unnoticed.
Home Watch Services vs. Just Checking In Occasionally
Yes. Professional home watch services provide structured inspections that go far beyond the occasional visit from a friend or neighbor. We understand the instinct, but a casual check and a proper inspection aren’t the same thing. A neighbor glancing at the front door isn’t checking the water meter, testing HVAC function, or looking under sinks for early signs of a leak. For a three-month absence specifically, that gap in thoroughness has a lot more time to matter.
For homes that fit a true vacation home watch pattern, closed for an entire season, not just a few weeks, this distinction matters even more. The longer the property sits, the more value there is in someone who knows exactly what to check and why, rather than someone doing a favor.
What We’d Check on Every Visit for an Extended Absence
| Area | What Gets Checked |
| HVAC | System running normally, indoor temperature holding steady |
| Plumbing | Water meter, under sinks, water heater, exposed fittings |
| Exterior | Drainage, landscaping, irrigation function |
| Power/Security | Backup systems functioning, no unexpected outages |
| General condition | Signs of pests, moisture, or anything out of place |
Three-Month Absence Checklist
- Service HVAC before leaving and set thermostat to a protective, not comfort, temperature
- Decide on water shutoff based on irrigation and pool needs
- Check irrigation timers and zones before departure
- Confirm battery backup on security systems and any monitoring equipment
- Coordinate access for any contractors, landscapers, or pool service needed during the absence
- Arrange consistent property watch services with a provider who checks systems specifically, not just the exterior
- Increase visit frequency compared to what’s reasonable for a shorter trip
Final Thoughts
Three months away isn’t something to prepare for the same way you’d prepare for a week. HVAC, plumbing, irrigation, security, and other systems that would normally get attention quickly need a clear plan when nobody is living in the home.
Most problems during an extended absence start small. The real risk is giving them weeks to develop without anyone noticing. Regular vacant home monitoring and professional property watch services help close that gap.
For seasonal homeowners, consistent home watch in Arizona provides more than an occasional check-in. It gives the property ongoing oversight while you’re away, with someone there to notice when conditions change and take the appropriate next step.
Frequently Asked Questions
Should we shut off the water for a three-month absence?
In most cases, yes, assuming irrigation or pool systems don’t depend on the same line. It removes the risk of an undetected leak over a long stretch, which is one of the most common causes of serious damage in extended absences.
How often should someone check on the house during a three-month trip?
This depends on the home and its systems, but for an absence this long, weekly checks are generally a reasonable standard, with increased frequency during high-risk periods like peak summer heat or monsoon season.
Is it worth having HVAC serviced right before a long trip?
Yes. A system already showing early signs of wear is far more likely to fail over three months than over a shorter absence, and a failure that goes unnoticed in summer can cause significant interior damage quickly.
What’s the biggest mistake homeowners make before a long absence?
Underestimating how much time three months gives a small issue to become a big one. A leak, an HVAC problem, or a landscaping failure that would be minor if caught early can become expensive if nobody notices for weeks.
Is a neighbor checking in occasionally enough for this length of absence?
Generally not. A neighbor can confirm the house looks fine from the outside, but a proper check involves specific things like the water meter, HVAC function, and plumbing fixtures, which most casual check-ins don’t cover.