Dennis O'Neill

Dennis O'Neill is a real estate agent with Century 21 Langos & Christian in Mt Prospect. MLS records credit Dennis with 12 transactions over the last 12 months, worth $5.2 million in total sales volume. Across both sides of the deal, that is an average of $436,300 per transaction.

5 of those transactions were on the listing side, representing sellers, for $2.3 million. The other 7 were on the selling side, representing buyers, for $3 million. The split is close to even, so Dennis works for both sellers and buyers.

The average price differs by side: $450,820 for listings and $425,929 for buyer-side sales.

By sales volume, Dennis ranks 16th of the 82 agents in Elk Grove Village with recorded sales, ahead of 80 percent of them. The typical agent there closed 4 transactions worth $1.5 million, so Dennis's volume is about 3.4 times the local median.

Statewide, Dennis is 4143rd by volume among 25,248 Illinois agents with recorded sales.

In ZIP code 60007, the address on Dennis's MLS record, the median sold price was $387,500 across 34 sales between September 2026 and October 2026. Dennis's average transaction of $436,300 sits close to that median.

Dennis is listed with Century 21 Langos & Christian, Mt Prospect. Other agents on the same office record, busiest first:

• Peter Gialamas22 transactions · 8.4M volume
• Robert Los17 transactions · 6M volume
• Maria Montesinos16 transactions · 5.3M volume
• Jan Goczkowski14 transactions · 4.8M volume
• Roseann Schumacher6 transactions · 3.1M volume
• Bradley Meyer4 transactions · 2.9M volume

These other Elk Grove Village agents also have recorded sales in the last 12 months. They are ranked by sales volume. Compare a few before you pick someone to interview.

• Claudia Goehner33 transactions · 12.3M volume
• Carrie Ramljak Ralls28.5 transactions · 11.8M volume
• Lori Christensen32.5 transactions · 11.5M volume
• Marty Rinehart23 transactions · 10.9M volume
• Hakan Sahsivar26.5 transactions · 10.3M volume
• Peter Lee17.5 transactions · 8.9M volume

The numbers on this page come from public MLS and license records, last updated May 2026. Transaction counts and dollar volumes cover the last 12 months and are credited to the agent named on each record. Dennis has not claimed this profile, and a listing here does not mean Dennis or Century 21 Langos & Christian endorses or is affiliated with Expert Agents Near Me. We collect no reviews, so there are no ratings from us on this page.