Real estate agent · Weymouth
Karen Costello
William Raveis Real Estate - Hingham
The local track record
Karen Costello ranks #93 by asking volume and #145 (tied) by homes listed in Quincy, among 603 agents and teams, with 1 home listed and $1.8M in asking volume. Median listing price in Quincy: NA. Figures cover Nov 2, 2025 – Nov 2, 2026.
Published geographic standings
Where this agent stands out
Citywide totals include qualifying neighborhood homes. Each geography has its own ranking; these rows are not added together.
| Area / reporting period | Homes listed | Listing rank | Asking volume | Volume rank | Median listing price |
|---|---|---|---|---|---|
| Weymouth ↗Boston · CitywideNov 2, 2025 – Nov 2, 2026 | 1 | T-108of 485 | $765K | T-169 | NA1 priced home |
| Quincy ↗Boston · CitywideNov 2, 2025 – Nov 2, 2026 | 1 | T-145of 603 | $1.8M | #93 | NA1 priced home |
Asking prices, not completed sales. Median listing price requires at least 5 priced homes and 90% price coverage; otherwise NA.
Answers from the data
About Karen Costello’s listing activity
Where is Karen Costello most active?
Among the published areas shown for Nov 2, 2025 – Nov 2, 2026, Karen Costello has the most credited homes in Quincy: 1. Citywide counts include qualifying neighborhood homes; geographic areas may overlap and are not added together.
View source and methodology ↗Where does Karen Costello rank highest?
Karen Costello ranks #93 by asking volume and #145 (tied) by homes listed in Quincy, among 603 agents and teams, with 1 home listed and $1.8M in asking volume. Median listing price in Quincy: NA. Figures cover Nov 2, 2025 – Nov 2, 2026.
View source and methodology ↗How does Karen Costello rank in Weymouth?
Karen Costello ranks #108 (tied) by homes listed and #169 (tied) by asking volume in Weymouth, with 1 home listed and $765K in asking volume from Nov 2, 2025 – Nov 2, 2026.
View source and methodology ↗What is Karen Costello’s median listing price in Weymouth?
NA. A median listing price needs at least five priced homes and prices for at least 90% of the credited homes in Weymouth from Nov 2, 2025 – Nov 2, 2026.
View source and methodology ↗How do citywide and neighborhood rankings relate?
Each area has its own ranking. A citywide count includes the agent’s qualifying homes inside that city, including its neighborhoods. Do not add neighborhood counts to the city total. A city boundary is different from the wider metropolitan area. These figures measure observed listing activity, not completed sales or service quality. Coverage is not complete MLS coverage.
View source and methodology ↗Loading current property availability…
How the listing data works
Scope & sources
What these figures tell you
Cribber measures observed listing representation using published geographic standings. Homes listed are distinct eligible properties credited to this agent or team; co-listed properties credit each named agent.
Asking volume uses listing asking prices and does not represent completed sales. Rankings do not measure service quality, buyer representation or negotiation outcomes. Coverage is not complete MLS coverage.
Keep the periods separate
Ranking dates appear with each area. Current property availability is separate from the published ranking. Historical samples, where available, carry their own dates and are not a complete career record.
Read the ranking methodology ↗Explore Weymouth’s leaderboard ↗