Credentials kept current
Ken earned his GRI in 1988, the year he was licensed, and added the SRES® designation in 2023.
Oakton · Fairfax County · Virginia
Ken knows Oakton's wooded roads by name, from Hunter Mill Road to Miller Road. On lots measured in acres rather than feet, he helps buyers and sellers read septic records, setbacks and tree cover before they talk price.
REALTOR® · GRI · SRES® · Licensed Since 1988
About Ken
Ken grew up next door in Vienna, graduated from Oakton High School and bought his first home in Oakton, and he has been licensed since 1988. Today Oakton is one of the three core markets of his practice, alongside Fair Oaks and Vienna. Its larger lots, custom houses and private septic systems reward an advisor who knows them, and Ken walks Oakton buyers and sellers through the well and septic inspection process.
Ken walks buyers and sellers through the well and septic inspection process, using the county's public permit records.
On half-acre to five-acre parcels he checks slope, drainage, easements and tree cover, which shape value as much as square footage.
Oakton's custom and semi-custom houses rarely have twins, so he builds comparisons from lot, era and condition rather than model name.
Oakton addresses split among three high school pyramids, so he confirms each one in the FCPS Boundary Locator.
This Area
Oakton was first called Flint Hill, until the Post Office objected that Rappahannock County already had one. Its own post office opened in 1883 near today's Route 123 and Hunter Mill Road crossroads, and the restored 1897 Oakton Schoolhouse now stands in Oakton Community Park. The community is unincorporated Fairfax County, with no town tax layer.
ZIP 22124 is the heart of Ken's Oakton work. County land records put the median detached lot at 0.77 acre, and 364 detached homes sit on two acres or more along roads such as Stuart Mill, Vale and Fox Mill. Most of those houses went up in the 1970s and 1980s, in subdivisions like Waples Mill Estates, Cinnamon Ridge, Tattersall, Berryland Farm and Clarkes Landing.
Septic is the norm for detached homes here. Mapping 22124 against the county's Approved Sewer Service Area places about 85 percent of detached homes outside it, and the county has refused new sewer availability outside that area since 1986. County Code requires a pump-out at least every five years, logged in the county's PLUS system, and about one in ten detached homes draws from a private well.
The Census Bureau's Oakton place is larger and denser than the ZIP, reaching toward the Vienna Metro station with townhouses and condominiums such as Four Winds. Oakton High sits about 0.4 mile from the station in a straight line, while the Miller Heights Road neighborhoods are about 3 miles out, so the commute changes a great deal from one end of Oakton to the other.
“Oakton feels tucked away in a way that defies its actual location.”
Ken Tully
Market Snapshot
Oakton is measured here by ZIP 22124: a modeled home value, the typical lot, how much of the detached stock relies on septic, and the share of homes that are detached.
Oakton closes only a few dozen sales a month, so medians can jump with one large lot or a run of townhouses; Ken pulls the comparable sales for your subdivision and lot size.
Local Insights
Ten topics drawn from county records, Census figures and Ken's experience owning and selling here. Select any topic to expand it.
Why Ken
Ken earned his GRI in 1988, the year he was licensed, and added the SRES® designation in 2023.
On homes with few true comparables, Ken tells sellers where the market will land, even when it is lower than they hoped.
First-time buyers he prepared once won a home against 29 competing offers, and the listing agent credited Ken's reputation.
Ken took the NAR settlement course five times, with five different instructors, to understand the new buyer agreements fully.
Questions
Most detached Oakton homes are on septic. Mapping 22124 against Fairfax County's Approved Sewer Service Area places about 85 percent of detached homes outside it, while townhouse and condominium communities such as Four Winds and Hearthstone Village are on public sewer. The county's Permitted Septic Records map shows the permit history for an individual parcel.
Chapter 68.1 of the Fairfax County Code requires an onsite septic tank to be pumped at least once every five years, and the contractor logs each pump-out in the county's PLUS system. Alternative systems need annual inspections and periodic sampling reported to the Health Department.
Usually not. Fairfax County has refused sewer availability outside its Approved Sewer Service Area since September 25, 1986, and the Board of Supervisors has historically declined to expand that area, though it may consider a septic failure confirmed by the Health Department.
Yes. County assessment records show about 10.7 percent of detached homes in 22124 without public water, most often in Miller Heights, Vale Spring Woods, Fox Lake and Connemara. The Health Department advises testing well water every year for bacteria and chemicals.
Under FCPS's 2026–27 boundaries, about 72 percent of detached homes in 22124 map to Oakton High, 25 percent to Madison High and 3 percent to Fairfax High. Much of the Hunter Mill and Stuart Mill side goes to Madison through Flint Hill Elementary, so Ken checks every address in the FCPS Boundary Locator.
Zoning. County records zone most detached 22124 homes R-1, with a 36,000-square-foot minimum lot, or R-1 cluster, and 328 sit in the R-E residential estate districts, where conventional lots must reach 75,000 square feet. Few new lots can be created, so the stock changes slowly.
Authority Center
Financing, inspections, estate sales and more, organized by topic and written in Ken's voice.
Other Areas
Five more community sites, each with its own data and answers, plus Ken's Authority Center.
The Fair Oaks area of unincorporated Fairfax County, where Route 50, West Ox Road, the Fairfax County Parkway and I-66 meet. Townhomes, condominiums and single-family subdivisions built mostly from the 1980s through the 2000s, and Ken's own home base. That site answers school-assignment, HOA and Fair Oaks versus City of Fairfax questions.
Visit kentullyfairfaxvirginia.com ↗22180 · 22181 · 22182The incorporated Town of Vienna and the Vienna-addressed neighborhoods around it, from Church Street and the W&OD Trail to Wolftrap and Lakevale, where Ken grew up. That site explains town versus county taxes and services, teardown rebuilds and the Orange Line station.
Visit kentullyviennavirginia.com ↗22101 · 22102McLean's established neighborhoods between the Potomac River corridor and Tysons, the McLean Silver Line station and the teardown lots behind much of its new construction. That site covers the Langley and McLean high school boundaries, lot zoning and commute routes.
Visit kentullymcleanvirginia.com ↗20147 · 20148Loudoun County's Ashburn: Ashburn Village, Ashburn Farm, Broadlands and Brambleton, the Silver Line Ashburn station and newer HOA communities. That site also maps the data center corridor and the questions buyers ask about it.
Visit kentullyashburnvirginia.com ↗20190 · 20191 · 20194The planned community founded in 1964, with Reston Association governance, five village centers, Reston Town Center and two Silver Line stations. That site explains the layered HOA structure, the trail and lake system and Reston's special tax district.
Visit kentullyrestonvirginia.com ↗Authority CenterKen's Authority Center gathers his Northern Virginia knowledge in twenty-two topics, from financing and inspections to estate sales and relocation, and links every community site in his network.
Visit kentully.com ↗Contact