Need a radon test in Montgomery County, MD? RADON & CO provides fast, NRPP-certified 48-hour radon testing for homeowners, buyers, sellers, agents, landlords, property managers, and commercial properties.
RADON & CO offers professional 48-hour residential radon testing in Montgomery County for $125 flat — no add-on fees for monitor placement, pickup, or the electronic report. That price applies whether the property is a rowhome in Takoma Park, a colonial in Olney, or a high-rise condo in North Bethesda.
Montgomery County is mapped by the EPA as Radon Zone 1 — the agency's highest-risk category, meaning the county's predicted average indoor radon screening level exceeds 4 pCi/L, the EPA's own action threshold. That's a countywide geological classification, not a prediction about any single property: radon levels still vary block to block and even room to room, which is exactly why the EPA and Montgomery County both recommend testing every individual home rather than relying on a neighbor's result or a zone map.
Our core Montgomery County services include residential radon testing, real estate radon testing, rental property testing, property management support, commercial radon testing, nursing home radon testing, school radon testing, and HUD-related project testing.
Montgomery County requires most single-family homes and townhomes to be tested for radon before sale, with the test performed within one year of settlement; condominium and cooperative units are excluded from that requirement, as are properties in the Town of Kensington, the Town of Poolesville, and the Town of Barnesville, which are specifically exempted. Separate county rules also apply to certain rental units. RADON & CO can help with testing and documentation, but property owners should confirm current legal requirements with county guidance, their agent, or counsel.
RADON & CO tests residential and commercial properties throughout Montgomery County, including:
“As a property manager in Montgomery County, these guys are my go-to when it comes to required radon testing for the properties I manage! They make it super easy to schedule and are always very responsive and fairly priced. They make my job so much easier!”
“If you are looking for a radon test, don’t hesitate to call Ali. He was very efficient, professional, and helpful. I called many places, and Ali was the only one who actually answered the phone. Nothing beats speaking to a real person. Highly recommended!”
“Not only does Radon & Co have the best prices around but the service is outstanding! They were easy to communicate with, always on time and had an extremely fast turnaround. Highly recommend and will definitely be using again!”