Karen S Ollier | Realtor, Irongate, Inc.

Karen S Ollier is a licensed real estate agent with Irongate, Inc. in Centerville, and a member of Dayton REALTORS®.

Recent Sales Activity

Over the past 12 months, MLS records show Karen on 48 closed sales (29 as the listing agent, 19 representing the buyer), about $20,406,092 in total sales volume. Most active in Kettering, Beavercreek, Centerville, Bellbrook, Washington Township and Clearcreek Township.

Dayton Report Leaderboards

• 1st in Bellbrook (5 sales)

Overview

Karen Ollier is a REALTOR® with Irongate Realtors, working out of the brokerage’s Centerville office at 122 N. Main St. Over the past 12 months she closed 48 sales worth a combined $20,406,092, a record spread across the southern Dayton suburbs and the eastern edge of Montgomery County.

Her work leans toward the suburban communities south and east of the city. Kettering, Beavercreek, Centerville and Bellbrook account for most of her closings, with smaller groups in Washington Township, Clearcreek Township, Springboro, Oakwood and Miamisburg. She did not record any closings in the City of Dayton or in West Dayton during the period.

Her prices cover a wide span. The lowest sale in the past year was $169,900 and the highest was $1,200,000, with a median of $371,750. That range reflects a practice that includes entry-level and mid-priced homes as well as a handful of sales at the upper end of the local market.

The sales record in numbers

Of her 48 closed sales, 29 were listing sides, where she represented the seller, and 19 were buyer sides. That works out to roughly three in five transactions coming from listings, a mix that suggests a practice anchored in marketing homes for sale while still serving a steady group of buyers.

On the 29 homes she listed, the median time on market was 39 days. The median sale-to-list price ratio was 97.5%, meaning the typical listing closed within about two and a half percent of its asking price. Eleven of the 29 listings, or 11 of 29, sold at or above the asking price.

The types of property she handled are varied. About 31% of her sales were renovated homes, a sizable share that points to experience with properties that have been updated before or during their time on the market. New construction made up 4% of her sales, and she closed 2 multifamily transactions in addition to her single-family work.

The median price of $371,750 sits in the middle of the suburban range in the communities where she is most active. Several of those areas have medians in the mid-$300,000s, and her sales across the year track close to that level, with the upper tail of the range driven by a few higher-priced closings.

Where she works

Kettering is her busiest area, with 9 sales in the past year. Her median sale price there was $350,000, compared with an area median of $260,000. That puts her Kettering work well above the typical price in the city, which suggests she handles larger or more updated homes than the market as a whole.

In Beavercreek she closed 7 sales at a median of $307,000, against an area median of $330,000. In Centerville, where her office is located, she closed 5 sales at a median of $390,000, a little above the area median of $349,900.

Bellbrook stands out. She closed 5 sales there at a median of $770,000, roughly double the area median of $385,000. The figure shows that her Bellbrook business sits at the top of that market, and it accounts for much of the upper end of her overall price range.

Elsewhere, she closed 3 sales each in Washington Township, Clearcreek Township and Springboro. In Washington Township her median was $365,000 against an area median of $412,000. In Clearcreek Township it was $450,000 against $567,000, and in Springboro it was $525,000 against $425,000. She also closed 2 sales in Oakwood at a median of $375,000, compared with an area median of $404,900, along with 2 in Miamisburg and 1 in Clay Township.

Her profile on Homes.com describes her as serving Dayton, Centerville and the greater Miami Valley, and active listings credited to her appear on a Centerville-focused home search site.

Background and credentials

Irongate’s Centerville office page lists Karen Ollier with the credentials MA, BS, CRS and GRI. The CRS designation is Certified Residential Specialist, and GRI is Graduate, REALTOR® Institute. Her profile on Homes.com describes her education as a bachelor’s degree in finance and a master’s degree in psychology. A professional networking profile lists Atlantic University as her school.

She is also described as a Certified Luxury Home Marketing Specialist (CLHMS), a designation that fits with the luxury homes listed among her specialties on one professional profile. That profile also lists relocation and first-time homebuyers among her focus areas. Another lists her as both a buyer’s agent and a listing agent.

Her length of experience is stated in a range of figures, from more than 32 years to 37 years depending on the profile. By any of those counts, she has worked in the business for more than three decades.

Recognition from her brokerage is part of that record. The Centerville office page lists her as Irongate’s #1 Agent 2016-2018. A professional profile also lists an Irongate Top Salesperson award for 2016 and a designation as Irongate’s #1 relocation agent in 2017. Her Homes.com profile says she was recognized as a 2025 Peak Producer and ranked #3 overall at Irongate Realtors. A 2022 Five Star Agent badge appears on FastExpert, which is a platform award rather than a brokerage one.

She also links to a personal website, karenollier.com, from her listing profiles.

How she compares locally

In Bellbrook, Karen Ollier ranks first among agents by closed sales over the past 12 months, with 5 sales. In a market where the area median price is $385,000, her median there was $770,000, so her lead in the count comes alongside a distinctly higher price point.

Her volume of $20,406,092 across 48 sales comes to an average of about $425,000 per transaction, above her median, which reflects the pull of the higher-priced sales at the top of her range.

Her record shows a practice built on suburban communities where she works repeatedly: Kettering, Beavercreek, Centerville and Bellbrook together account for 26 of her 48 closings. In several of them, including Kettering, Centerville, Bellbrook and Springboro, her typical sale price runs above the area median. In others, such as Beavercreek, Washington Township and Clearcreek Township, she works close to or somewhat under it, which gives her a range across price tiers.

Her listings, meanwhile, closed in a median of 39 days at 97.5% of asking, and more than a third sold at or above the list price. Together, those figures describe an agent with a long record at one brokerage, a concentration in the south Dayton suburbs, and a clear presence at the higher end of the Bellbrook market.

Leaderboard Badges

Karen can show this badge on a website, email or listing presentation. Each one updates itself with the current rank.

<a href="https://daytonreport.com/realtor-leaderboards/bellbrook/" title="Dayton Report realtor leaderboard"><img src="https://daytonreport.com/badge/OLLIEKARS109/bellbrook.svg" alt="No. 1 Realtor in Bellbrook, Dayton Report 2026" width="240" height="80"></a>

Contact

Office phone: (937) 336-5053
Profile on the Irongate, Inc. website

Sales figures come from Dayton REALTORS® MLS records and are updated monthly. Information deemed reliable but not guaranteed. Is this you? Claim this listing to add your photo, bio and contact details.