First Rental Property Starter Kit: 12 Things to Have Before Your First Tenant Moves In

The first year of owning a rental tends to deliver the same handful of surprise calls: a slow leak nobody noticed until the ceiling stained, a lockout at 10 p.m., a chirping alarm, a toilet that won’t stop running. Almost all of them are cheaper to prevent than to fix. This kit is organized by the problem each item solves, starting with safety.

Safety first: required in most places

1. Smoke and carbon monoxide alarms

Most jurisdictions require working smoke alarms in rental units, and many require CO alarms where there’s a fuel-burning appliance or an attached garage. Placement rules vary, but often include each bedroom, outside sleeping areas, and every level. Some states require sealed, 10-year-battery alarms when you replace battery-only units.

• If the unit has hardwired alarms: replace like with like. A hardwired combination alarm such as the Kidde i12010SCO (smoke + CO, hardwired with 10-year sealed battery backup) can interconnect with compatible units of the same brand. Check the brand and connector of what’s in the ceiling before you buy, and use an electrician if you’re not comfortable with wiring.
• If there’s no wiring: 10-year sealed battery smoke + CO combination alarms from Kidde or First Alert mean no battery swaps between tenants and no tenant pulling the battery out.

Write the install date on each alarm with a marker, and record it in your maintenance log. Test alarms at every move-in and log the result on your inspection checklist.

2. A kitchen fire extinguisher

Some localities require one in each unit. Even where not required, a kitchen-rated extinguisher from Kidde or First Alert mounted near (not right next to) the stove is inexpensive. Check the rating label and gauge, and add “gauge in green” to your annual inspection.

Access: fewer lockouts, no rekeying scramble

3. A key lockbox

A Master Lock 5400D-style portable lock box holds a few keys behind a resettable 4-digit combination and hangs on a doorknob or railing. It’s useful for contractor access when you can’t be there, for showings, and as an emergency spare. Change the code after each use by someone outside your household.

4. A keypad smart deadbolt

Between tenants you’re supposed to rekey or change locks (and some places require it). A keypad deadbolt like the Schlage Encode or Yale Assure Lock 2 lets you issue a new code per tenant and a temporary one per contractor, with no locksmith visit. Things to check:

• Door prep: standard deadbolt bore sizes and door thickness. Check the manufacturer’s fit guide.
• Wi-Fi vs. Bluetooth: Wi-Fi models allow remote code changes but need the tenant’s network or a hub. Decide who owns that relationship.
• Physical key backup: some models have one, some don’t. Decide what you want for dead-battery situations.
• Tenant privacy and entry rules: having remote access doesn’t change your notice-before-entry obligations. Put your smart-lock policy in the lease.

Water: the most expensive slow problem

5. Water leak sensors

Small battery-powered leak sensors (Govee is a common brand) under the kitchen sink, behind each toilet, next to the water heater, and under the washer will sound an alarm, and in Wi-Fi models alert a phone, when they get wet. Decide whether alerts go to you, the tenant or both, and put it in writing.

6. A moisture meter

When a tenant reports a “stain on the ceiling,” a pin-type moisture meter like the General Tools MMD4E helps you tell whether it’s an active leak or an old, dry stain before you call a plumber. Expect it to show relative readings, so compare the stained area with a dry area nearby.

7. Know your shut-offs, and label them

Before the first tenant arrives, find and label the main water shut-off, each fixture shut-off, the gas shut-off and the electrical panel. A Brother P-touch label maker earns its keep here. Laminated tape survives basements. Put a one-page “where things are” sheet in the unit and a copy in your property folder.

Electrical

8. An outlet tester

A plug-in outlet tester like the Klein Tools RT210 shows common wiring faults (open ground, reversed polarity) and, on GFCI-capable models, lets you trip GFCI outlets. Use it at every turnover. It doesn’t replace an electrician, but it tells you when you need one.

Spare parts that save a service call

9. Toilet flappers

A running toilet wastes water (and, if you pay the water bill, money) and is often fixed by a replacement flapper (Fluidmaster is a widely stocked brand). Check the flush valve size (2-inch vs. 3-inch) of each toilet and keep one spare per bathroom.

10. HVAC filters on a schedule

Clogged filters strain furnaces and AC units, which are among the most expensive components you’ll replace. Note the filter size printed on the current one and keep a supply of Filtrete or equivalent filters in that size. Decide in the lease who changes them and how often, and consider doing it yourself during routine visits.

11. A basic turnover tote

Keep one bin per property with spare light bulbs in the sizes the unit uses, smoke alarm batteries if applicable, outlet covers, cabinet bumpers, a caulk tube, touch-up paint labeled with the room and color code, and a bright inspection flashlight.

Paperwork and money

12. A records system and a reserve account

The non-physical part of the kit:

• A dedicated rental checking account and card. See Stessa vs. Baselane vs. a spreadsheet.
• A folder structure for receipts, leases and warranties. See how to organize rental records.
• A funded reserve for repairs and big-ticket replacements. See how much to set aside for maintenance and capex.
• Appliance and system model numbers, install dates and warranty info, recorded the day you close.

Starter kit checklist

• Smoke and CO alarms installed per local code, dated, tested
• Kitchen fire extinguisher mounted and gauge checked
• Lockbox with a known code (changed after each use)
• Locks rekeyed or keypad deadbolt installed with new codes
• Leak sensors at sinks, toilets, water heater, washer
• Moisture meter and outlet tester in your kit
• Water, gas and electrical shut-offs found and labeled
• Spare flapper(s) matched to each toilet
• HVAC filter size noted, spares on hand, schedule in the lease
• Turnover tote stocked
• Appliance and system info recorded with install dates
• Reserve account opened and first contribution made

Most of these items are purchased once and quietly prevent the worst first-year calls.