A buyer's guide for radon testing and mitigation companies: how to judge an agency on speed for real estate deadlines, turning tests into installs, and referral pages for agents.
Why a generalist agency misses how radon jobs actually get won
A radon company runs on two different clocks at once, and most marketing agencies only see one of them. The first clock belongs to a home sale: a buyer's inspection turns up a radon test contingency, and that contingency usually has a hard deadline measured in days, not weeks. Whoever answers the phone first and can book the test inside that window gets the job, no matter what the website looks like. The second clock belongs to a homeowner who isn't selling anything, who just wants to know if their own house is safe, often after hearing radon is common in their region. That search has no deadline at all, and it rewards whoever ranks and looks trustworthy over time.
A generalist agency tends to build one page and run one campaign as if every visitor is the same person. That misses the real economics of the business too. Testing is often close to break even, while mitigation, the install that actually lowers the radon level, is where the margin sits, with installs commonly running somewhere in the $800 to $2,500 range. An agency that only counts booked tests, and never asks how many of those tests turn into a signed mitigation job, is measuring the wrong number.
There's a third blind spot: radon levels are not fixed. They move with the seasons, with renovations, and as a mitigation system ages. That means a company that only markets to win the first test walks past a whole second business, retesting, and post-install checkups, that a specialist agency would build a follow-up system around from day one.
The first qualifying question to ask any agency
Ask this directly on the first call: “If a call comes in from a homebuyer with a five-day inspection deadline, and a different call comes in from a homeowner who just wants peace of mind on their own timeline, how would your marketing treat those two people differently?” A specialist agency should be able to answer without pausing. They'll describe a fast-response, mobile-friendly booking path built for the deadline caller, alongside separate content and search terms built for the homeowner who is comparing companies over a week or two, not a day.
If the answer is a single generic “we'll get you more radon leads” pitch with no mention of that split, or no mention of what happens after the test result comes back, you're talking to a generalist who will treat your business like any other home service. The follow-up question worth asking next is just as telling: “What happens in your system the day after a test comes back positive?” A company that has thought about this will already have an answer built around turning that result into a booked mitigation install, not just a lead that quietly goes cold.
The channels that actually fill a testing and mitigation calendar, in order
Google Ads is usually the fastest way to capture the homeowner who is searching “radon testing near me” or “radon mitigation near me” right now, and it matters most for the deadline-driven real estate side of the business, where a buyer under contract can't wait for organic rankings to catch up. Every call from these campaigns should be tracked, because the value of a click here is really the value of the mitigation job behind it, not the test itself.
Local SEO and a fully filled-out Google Business Profile build the slower, cheaper stream: homeowners in a known high-radon region who are researching without a deadline, plus the searches that follow a positive test, like “radon mitigation system cost.” Reviews carry real weight here, since a homeowner is choosing who installs equipment in their basement, not just who runs the test.
AI search is starting to matter the same way it does everywhere else; when someone asks an assistant who does radon testing or mitigation nearby, a company with no presence in that answer isn't in the running. And a channel that isn't a marketing channel in the usual sense, but functions like one, is the referral relationship with real estate agents and home inspectors. A specialist agency can build a simple, fast referral page and a way for those agents to book or check status without a phone call, which is often the difference between a handful of agent relationships and a real pipeline. Email and text follow-up close the loop: reminding a past customer it's time to retest, or a mitigation customer it's time for a system checkup, is the cheapest booking you'll ever get, because you already did the hard part once.
Seasonality, and the real numbers worth tracking instead of raw leads
Radon marketing has to plan around two separate calendars. Homes are typically sealed tighter in the colder months, which is when indoor radon levels tend to run higher and homeowner awareness campaigns and utility or health department messaging tend to pick up. Real estate testing volume follows a different pattern entirely, tracking the spring and summer home-buying season in most markets, when more contracts are signed and more inspection contingencies get triggered. An agency running one flat budget all year is guessing on both calendars at once.
The number worth watching isn't leads or even booked tests, it's cost per booked mitigation install, since that's where the business actually makes money. A second number worth asking about is retest and checkup rate: what share of past customers get re-contacted, and how many of them book again. Ask any agency candidate plainly: “How will you track which tests turn into mitigation jobs, and can I see that in my own systems, not just a report you send me?” If they can't describe call tracking and a way to tie a test back to the install it produced, they're optimizing for activity, not for the number that pays your bills.
Red flags, and the ownership questions that protect your company
Lock-in is the single biggest risk to watch for. Ask plainly: who actually owns your website, your Google Ads account, your Google Business Profile, and your customer list, including who tested positive and who hasn't been asked to retest yet? A company that can't pull that list out of an agency's private system on request is not actually in control of its own pipeline, no matter how good this month's numbers look.
Watch for any promise about a specific radon reading, ranking, or number of jobs. Radon levels are measured, not marketed, and no honest agency can promise what a test will find or guarantee a page-one ranking in a competitive market. Also watch for a single templated package sold the same way to a company that's mostly real estate closings and one that's mostly direct homeowner calls, since those are different businesses that need different plans.
Finally, ask how the agency's team, or the company itself, is certified. Many states and provinces expect a radon tester or mitigator to hold a recognized certification or state license, and an agency that has worked in this space before will know to feature that credential prominently, because it's one of the few trust signals a nervous homeowner can actually check.
Six questions to ask before you choose a radon marketing agency
One: how would you treat a homebuyer on a five-day inspection deadline differently from a homeowner testing on their own schedule? Two: what happens in your system the day after a test comes back positive, and how does that turn into a booked mitigation job? Three: how will you track cost per mitigation install, not just cost per lead, and can I see that tracking in my own accounts? Four: how do you plan around the colder-weather awareness season and the spring and summer real estate season, and does the budget move with them? Five: do I own my website, ad accounts, Google Business Profile, and customer list, and what happens to each if we part ways? Six: how would you build a simple retest and system-checkup follow-up so past customers come back instead of drifting to the next company they find?
SearchPod works with radon testing and mitigation companies, so this same list applies to us too, and we'd hold ourselves to answering it plainly. What we charge is no secret: Google Ads runs at 10% of ad spend with a $600 monthly floor and no markup, SEO is billed at $50 a page with a 10-page monthly minimum, and a new website is a one-time build starting at $1,500 and running up to $20,000 or more, with no setup fee. There's no long contract, the work carries a 30-day guarantee, and asking for a free proposal at /get-proposal gets you an answer within a business day. Judge us, and every other agency on your list, by whether the answers are specific enough to act on.
