Most buyers know to order "an inspection." Fewer know that a general inspection is one of several, and that which others you need depends on where the home sits and what serves it. In the Treasure Valley the big dividers are city services versus well and septic, the age of the sewer line, and whether the lot has irrigation water.
Start with a general home inspection on every Treasure Valley purchase. Then add the inspections the property calls for: a radon test, a sewer scope on older or tree-lined lots, well-water and septic checks outside city services, and a look at the irrigation system. Idaho's seller disclosure form is not a substitute for any of them.
What Does a General Home Inspection Cover, and Who Should Do It?
A general inspection is a visual review of the home's structure and systems: roof, foundation, electrical, plumbing, heating and cooling, and the visible condition of everything in between. It is the baseline on every purchase, including new construction.
Idaho does not issue a state home inspector license. The Idaho Division of Occupational and Professional Licenses' list of licensed professions does not include home inspectors. That puts the screening on the buyer: ask about certification through a national association, errors-and-omissions insurance, how many inspections they have done, and for a sample report before you hire.
A general inspector flags concerns and recommends specialists. Treat "recommend further evaluation by a licensed roofer / electrician / structural engineer" as a to-do with a deadline, not a footnote.
Should I Test for Radon in the Treasure Valley?
Yes. The Idaho Department of Health and Welfare reports that 2 out of 5 Idaho homes have elevated radon levels, and the EPA recommends fixing a home that tests at 4.0 picocuries per liter or higher. Radon has no smell and no relationship to how new or well-kept a house is. Two homes on the same street can test differently, so the neighbor's result tells you little. A short-term test fits inside the inspection period, and a mitigation system is a known, fixable cost you can negotiate.
When Is a Sewer Scope Worth It?
A sewer scope runs a camera through the line from the house to the main. It matters because the line is yours. In Boise, city code makes the property owner responsible for the private service line, including cleaning, maintenance and repair. Other Treasure Valley cities set their own rules, so ask which apply.
Order a scope on older homes, on lots with mature trees near the line, and on any home where drains run slowly. A general inspection does not include it.
What If the Home Has a Well or a Septic System?
Outside city water and sewer, two more checks come into play.
Well water. Idaho does not regulate water quality at privately owned wells, and owners are responsible for their own testing. Central District Health advises testing well water once a year for bacteria and nitrates. Idaho DEQ names nitrate, bacteria and arsenic among the most common groundwater contaminants in the state. Uranium deserves a specific mention here: an Idaho Department of Water Resources study published in October 2019 compiled results from 649 wells across six southwestern Idaho counties, including Ada and Canyon, and found 17.1% above the federal drinking-water standard for uranium, including 22.6% of the Ada County wells. That is a compiled dataset, not a random sample of homes, but it is reason enough to add uranium and arsenic to the lab order.
Septic. Idaho's public health districts permit and oversee septic systems: Central District Health for Ada County and Southwest District Health for Canyon County. Lenders often ask for a health-district mortgage survey to confirm where the well and septic are. That survey locates the system; it does not tell you how well it works. Have the tank pumped and inspected by a septic professional, and ask the health district for the permit record.
How Do I Check the Irrigation System?
Many Treasure Valley lots are watered by pressurized irrigation that is separate from the drinking-water system and delivered by an irrigation district, not the city. The Nampa & Meridian Irrigation District, for example, turns its pressurized systems on around April 15 and shuts them down around the first week of October.
The practical problem: a home bought between October and April cannot have its irrigation run and tested. Ask the seller for the last season's repair history, confirm which district serves the lot and what the annual assessment is, and talk with your agent about how to handle an untested system in the contract.
Do I Still Need Inspections on New Construction?
Yes. A new home has not been lived in, which means nothing has been tested by use. An independent inspection before closing, and another before the builder's warranty period ends, catches what a final walkthrough does not. (Related reading: the new-construction walkthrough checklist on treasurevalleynewconstruction.com.)
Doesn't the Seller's Disclosure Cover This?
No. Idaho's Property Condition Disclosure Act requires sellers of most residential property to complete a disclosure form, and the statute itself requires the form to state that it "is not a substitute for any inspections" and is not a warranty. It reports what the seller actually knows. Inspections find what the seller does not.
How Do I Fit All of This Into the Inspection Period?
The inspection period is the window after acceptance when you can inspect and respond (5 days by default on the Idaho state forms, and negotiable in the offer). Lab work for well water and some radon tests take days, so schedule every inspection the day the offer is accepted, and decide before you write the offer whether the property needs a longer window.
How MHC Handles Inspections
An MHC buyer's agent builds the inspection list with you before the offer is written, so the inspection period asked for in the offer fits what the property needs. Once the offer is accepted, each inspection is scheduled to the contract deadline and the results are tracked as they arrive. The response to the seller is negotiated from the reports.
Frequently Asked Questions
What inspections do I need when buying a house in Idaho?
A general home inspection is the baseline. Add a radon test, a sewer scope on older or tree-lined lots, well-water testing and a septic inspection when the home is not on city services, and a check of the irrigation system when the lot has one.
Are home inspectors licensed in Idaho?
Idaho does not issue a state home inspector license, so buyers should ask about national certification, insurance, experience and a sample report before hiring.
Who pays to fix the sewer line between the house and the street in Boise?
Under Boise city code the property owner is responsible for the private service line, including maintenance and repair. A sewer scope during the inspection period shows the line's condition before you own it.
Does the Idaho seller disclosure replace a home inspection?
No. Idaho law requires the disclosure form to state that it is not a substitute for any inspections and is not a warranty.