Radon Disclosure Requirements When Selling a Home in Virginia

How Virginia Disclosure Law Applies to Radon

Virginia sellers operate under the Virginia Residential Property Disclosure Act, codified at Virginia Code § 55.1-700 et seq. The Act requires sellers to disclose known material defects that a buyer could not reasonably discover on their own. A radon test result showing levels above 4 pCi/L is a known material defect under that standard.

Virginia does not have a standalone radon disclosure statute the way some states do. Instead, the disclosure mechanism runs through the standard Virginia Association of Realtors (VAR) Residential Sales Contract and the property disclosure form that sellers complete at listing. Both documents address radon explicitly. The VAR disclosure form asks whether the seller has knowledge of radon test results and whether a mitigation system has been installed.

The practical rule is straightforward: if you know your home has elevated radon, you must disclose it. Sellers who conceal known test results or deny the existence of a mitigation system risk post-sale fraud and misrepresentation claims under Virginia law. The cost of a mitigation system ($900 to $2,500) is a fraction of the legal exposure that comes from concealing a known issue.

The Strategic Case for Testing Before You List

Virginia law does not require sellers to test before listing. What it prohibits is concealing results you already have. That said, pre-listing testing is strategically sound in most Virginia markets, for reasons that go beyond legal compliance.

When a buyer’s inspector finds elevated radon during the inspection period, the seller loses control of the negotiation. The buyer sets the terms: mitigation, a price credit, or in some cases contract termination. Sellers who test first and mitigate proactively arrive at the negotiating table with documentation in hand. A post-mitigation result below 2 pCi/L, paired with a transferable system warranty, removes radon as a negotiating point entirely.

In competitive markets like Northern Virginia, where multiple-offer situations are common, a pre-listed mitigation system with clean paperwork can be a meaningful differentiator. Buyers who have lost contracts over radon before know to ask for it upfront.

Northern Virginia: Radon Testing Is Standard Practice

In Fairfax, Loudoun, Prince William, and Arlington counties, radon contingencies are routine. Agents who work these markets regularly include radon testing language in offer contracts and advise clients to budget for it. Fairfax County sits on Piedmont crystalline basement geology, which produces moderate to elevated radon. The county also has a large inventory of split-level and raised-ranch homes built in the 1960s and 1970s, floor plans that trap radon more efficiently than modern construction.

For NoVA sellers, the pre-listing test and mitigate approach is not just good practice, it is often what agents now recommend as a baseline. Homes in Reston, Burke, Springfield, and Centreville regularly test above 4 pCi/L. Addressing radon before the listing goes live keeps the transaction on schedule and prevents a mid-contract surprise from derailing a competitive deal.

Shenandoah Valley and Western Virginia: High-Zone Terrain

Shenandoah, Warren, Page, Rockingham, Augusta, and neighboring counties form some of the highest-radon terrain in the eastern United States. The Blue Ridge metamorphic province and the limestone and dolomite karst of the Shenandoah Valley both produce elevated radon concentrations. Sinkholes and fractures in karst formations channel radon from depth directly into building foundations.

In Harrisonburg, Staunton, Waynesboro, Front Royal, and Winchester, radon testing is virtually universal in real estate transactions. Sellers of older farmhouses, stone foundations, and homes with crawlspaces on karst terrain should expect elevated results and plan accordingly. For mountain retreat properties in the Blue Ridge, elevated radon is the norm rather than the exception. Disclosing a mitigation system and providing current test documentation adds transparency and speeds the sale.

Richmond Metro: Testing Increasingly Common

The Richmond metropolitan area spans the fall line between Piedmont geology to the west and Coastal Plain sediments to the east. Chesterfield and Henrico counties, which sit on Piedmont crystalline basement, see moderate radon levels. Buyers in these markets are increasingly familiar with radon and agents routinely recommend testing during the inspection period, though it has not yet reached the universal expectation seen in NoVA.

For Richmond sellers, the calculus is similar to any moderate-zone market: testing before listing costs $125 to $350 and either confirms low levels (which you can disclose as a selling point) or gives you time to mitigate before the home hits the market.

Hampton Roads: Lower Risk, but Testing Still Recommended

Virginia Beach, Norfolk, Chesapeake, Suffolk, and the surrounding Hampton Roads communities sit on Cretaceous and Tertiary sediments of the Coastal Plain, geology that produces low radon. Most homes in this region test well below 4 pCi/L. Radon is less routinely flagged by agents here than in western Virginia, but some buyers still request testing, particularly those relocating from high-radon states.

Sellers in Hampton Roads should not assume a low result without testing. Even within low-zone geology, localized conditions can produce elevated readings. A test before listing confirms what sellers usually already suspect and gives them documentation to share with buyers who ask.

How Virginia Buyers Are Protected Under Standard Contracts

The standard VAR Residential Sales Contract includes an inspection contingency that gives buyers a window, typically 10 to 15 days, to conduct professional inspections, including radon testing. Buyers pay for the test. Results above 4 pCi/L give them grounds to:

Request that the seller install a mitigation system before closing
Negotiate a price reduction or closing credit to cover mitigation costs
Accept the results and handle mitigation themselves after closing
Terminate the contract and recover their earnest money if the seller refuses to negotiate

Buyers should request testing by an NRPP or NRSB certified radon measurement professional using a calibrated continuous radon monitor (CRM). Test duration is typically 48 to 96 hours, fitting comfortably within the standard inspection window. Virginia Department of Health (VDH) oversight of radon professionals ensures that certified testers meet state standards.

What to Disclose About an Existing Mitigation System

Many Virginia homes, particularly in NoVA and the Shenandoah Valley, already have mitigation systems installed. If your home has a system, buyers and their agents will want complete documentation:

Name and NRPP or NRSB certification number of the installing contractor
Installation date and the original post-mitigation test result
Any subsequent re-test results (VDH recommends testing every two years after mitigation)
Warranty documentation and fan model information

Buyers and their inspectors will physically inspect the system during the inspection period: verifying that the fan is running, that the manometer (the U-shaped gauge on the pipe) shows negative pressure indicating suction below the slab, and that pipe connections and exterior termination points are intact. Make sure the system is operational before listing. A system that has not been re-tested in several years is a flag for buyers; schedule a current test before the home goes on the market so your documentation is fresh.

Seller Strategy: Step by Step

Test before listing. Hire an NRPP or NRSB certified measurement professional. Cost: $125 to $350. Testing during the heating season (October through April) produces the most conservative result.
If results are below 4 pCi/L, document the test and attach it to your disclosure. Most buyers accept these results without further negotiation.
If results are between 4 and 8 pCi/L, install a sub-slab depressurization system promptly. Get a post-mitigation test showing levels below 2 pCi/L and include that with the disclosure.
If results are above 8 pCi/L, same action, prioritized. High readings alarm buyers more than mid-range readings. A documented result below 2 pCi/L after mitigation converts a potential deal-killer into a non-issue.
Transfer the warranty. Most Virginia mitigation contractors offer a warranty on their systems. Transferring it to the buyer at closing adds tangible value and reduces post-sale liability exposure.

Find Certified Radon Professionals in Virginia

Whether you need a pre-listing test, a mitigation system before closing, or documentation for a buyer’s inspection contingency, our directory lists radon professionals in Virginia who hold NRPP or NRSB certification as required by VDH. The directory covers professionals across the state, from Fairfax and Loudoun in Northern Virginia to Roanoke, Harrisonburg, and the Shenandoah Valley, Richmond metro, and Hampton Roads.

Frequently Asked Questions

Does Virginia require radon disclosure when selling a home?

Yes. Under the Virginia Residential Property Disclosure Act (Virginia Code § 55.1-700 et seq.), sellers must disclose known material defects. If you have a radon test result showing elevated levels, that qualifies as a known material defect and must be disclosed. Virginia does not have a standalone radon statute, but the standard Virginia Association of Realtors Residential Sales Contract and property disclosure forms both address radon directly.

What if I have never tested my Virginia home for radon?

You cannot disclose a result you do not have. If you have never tested, you note that on the disclosure form. However, in markets like Northern Virginia, Fairfax County, and the Shenandoah Valley, buyers will request a professional test during their inspection period regardless. Testing before listing gives you control over timing and lets you mitigate proactively if the result is high.

Can a Virginia buyer walk away from a contract because of a high radon result?

Yes. Standard Virginia purchase contracts include an inspection contingency. A radon result above 4 pCi/L gives buyers grounds to request mitigation, ask for a price concession, or terminate the contract. In practice, most deals close once radon is addressed. A seller who has already mitigated and holds post-mitigation documentation below 2 pCi/L removes this risk entirely.

Does a mitigation system help or hurt a home sale in Virginia?

It helps. A properly installed, warranted system with a current post-mitigation test result below 2 pCi/L is a selling asset, particularly in high-zone markets like NoVA and the Shenandoah Valley. Experienced buyers and their agents know mitigation works. An untreated elevated result raises more concern than a system that is already running.

What should I disclose about an existing mitigation system?

Disclose the installer name, installation date, original post-mitigation test result, any subsequent re-test results, and warranty documentation. Buyers will want to see that the system fan is operational and that the manometer shows negative pressure. If the system has not been re-tested recently, schedule a test before listing so your documentation is current.