Do this before a repair emergency. Photograph each control or access point, add a plain-language label and store the map where another adult, house sitter or technician can find it without calling you.
Build a one-page emergency map of the house
Photograph the main water shutoff, gas shutoff if present, electrical panel, furnace or air-handler service switch, water-heater controls, HVAC filter location, sump pump and backup, sewer cleanout, irrigation controller, well equipment where applicable, GFCI reset locations and attic or crawlspace access. Add short labels that make sense to someone who did not walk the house with you. “Red handle behind basement shelving shuts off whole house” is more useful than “water valve.”
Test only what can be verified safely. Breaker labels can be checked circuit by circuit with another person, but an unknown or damaged panel is not a DIY exploration project. Valves can be identified without forcing corroded hardware. Confined or difficult attic/crawlspace access does not need to be entered just to prove you found it. Store the final map both locally and in a backed-up digital location, and give another adult in the household access before an emergency happens.
- Add model and serial photos for HVAC, water heater and major appliances while you are already mapping the house.
- Keep storage from blocking shutoffs, panels and service access.
- Update the map after renovations, equipment replacements or plumbing changes.
After locating the water shutoff, electrical panel, furnace switch, HVAC filter, sump equipment, irrigation controller, sewer cleanout, and other high-value controls, put them on a one-page diagram or photo sheet. Add access notes such as “behind basement shelf” or “left side of garage,” but do not publish sensitive access information. Store a copy where household members can find it during a leak or outage and keep a secure digital copy with the home records.
Use the move-in walk to discover labels, not to improvise repairs. If a gas shutoff is inaccessible, a breaker directory is clearly wrong, a panel shows unsafe conditions, or a crawlspace or attic cannot be entered safely, add a professional follow-up task. The objective is operational awareness: you should know how to isolate water, cut power to a known circuit when appropriate, find service filters, and tell a contractor exactly where major systems are located.
Map the controls before you need them
| When / trigger | What to do | Why it sits here |
|---|---|---|
| 1 | Main water shutoff | Photograph access and note which direction closes it. |
| 2 | Gas shutoff or fuel isolation point where present | Know location; do not operate utility-owned equipment casually. |
| 3 | Electrical service panel | Label circuits by verified loads and note main disconnect. |
| 4 | Water-heater controls and local shutoff | Record fuel type, model, age, and drain location. |
| 5 | HVAC filter | Record size, airflow arrow, quantity, and access panel. |
| 6 | Sump pump and backup | Note receptacle, discharge, alarm, and battery age. |
| 7 | Sewer cleanout | Keep it accessible for a drain emergency. |
| 8 | Irrigation controller/backflow | Photograph settings and shutdown points. |
| 9 | Well pump/pressure tank if present | Record disconnect and service company. |
| 10 | Furnace/air-handler service switch | Know which switch is actually the equipment disconnect. |
| 11 | GFCI reset/test locations | One upstream device may protect several “dead” outlets. |
| 12 | Attic and crawlspace access | Keep routes clear but do not enter unsafe spaces. |
Test access without turning discovery into repair
- A valve or panel is blocked by stored items.
- Circuit labels conflict with actual loads.
- You cannot locate HVAC filter.
- Sump or cleanout access is buried.
Store the map where another adult can find it
Freeze-prone houses should add exterior plumbing shutoffs; hurricane regions should add shutter hardware and generator transfer equipment; wildfire areas may add exterior water and ember-control features.
Labels, photos, and a few replacement filters cost very little. The financial value is reducing response time and avoiding emergency service calls for problems you can safely isolate.
Unknown gas, electrical and confined-space conditions need caution
Do not open sealed utility equipment, remove panel covers, adjust gas valves unnecessarily, or enter unsafe attics/crawlspaces. Stop at identification and safe access; this move-in exercise is not an intrusive inspection.
Moving-in systems questions
Which shutoff or control should I locate first after moving in?
Locate the main water shutoff first because an uncontrolled plumbing leak can cause damage quickly. Then find the electrical panel and main disconnect, gas shutoff if applicable, furnace or air-handler switch, water-heater controls, sump pump and other emergency controls. Photograph them and make sure household members can reach them. Do not operate an unfamiliar gas valve or electrical disconnect just for practice; identify it and learn the safe procedure first.
How should I label breakers without trusting old panel notes?
Verify circuits by controlled testing rather than trusting handwritten notes from a prior owner. With appropriate help and safe access, switch one breaker at a time and confirm which lights or receptacles lose power, then label the panel clearly. Do not remove the panel cover or work on energized conductors. Large appliances, multiwire circuits and ambiguous breakers may warrant an electrician if simple on/off verification does not produce a clear map.
What photos are worth saving with model and serial numbers?
Save photos of model and serial plates, filter sizes, water-heater data, HVAC equipment labels, sump and backup equipment, irrigation controller, water softener and major appliances. Also photograph the main shutoff, cleanouts and access panels in context so you can find them later. Store installation or service dates with the photos. A close-up label without a wider location photo is much less useful during an emergency or service call.