Mariah Cosio
Agent, Re/Max Top Producers ·CA DRE #02032322
The verified record
Every number below is computed from public records of closed sales, last 24 months · how we compute thisAbout Mariah
Compiled from public sources — not written by the agent
Mariah Cosio is a real estate agent based in Diamond Bar, CA, who describes her approach as being backed by total integrity and a relentless work ethic. She actively networks at events like ICSC 2022 and represents clients in both residential and commercial transactions, including restaurant sales.
What clients say elsewhere
AI synthesis of publicly posted reviews on other platforms
Client testimonials highlight successful transactions, such as helping five members of the Cardenas family purchase real estate and assisting the Dominguez family in securing a home within three months. Clients express gratitude for her ability to understand specific needs, such as finding remodeled homes in beautiful communities, and appreciate her support throughout the home buying process.
We don't host reviews yet — when we do, every review will be tied to a verified transaction. Read the originals via the links in the sidebar.
Performance in detail
Verified from public records · 2023–2026 · metrics shown only where at least 3 closed listings support them
Closed transactions by year
Current year is partial
Price range of closed sales
Middle 50% of Mariah's transactions vs the Whittier market
Who Mariah represents
18 total closed sides, 2023–2026
Where Mariah sells
Closed sales by ZIP, last 24 months
| ZIP | City | Sales (24 mo) | Median price | Avg DOM |
|---|---|---|---|---|
| 91706 | Baldwin Park | 1 | $615K | — |
| 92562 | Murrieta | 1 | $417K | — |
| 92570 | Perris | 1 | $582K | — |
6 more ZIPs with older sales (before the last 24 months) not shown.
Questions to ask Mariah in an interview
Generated from this agent's own public sales record — bring them to your first call
- Your typical sale is $412K — how does your approach change for a home like mine?
- Who will I actually work with day-to-day — you or a team member?
Compare with similar Whittier agents
Ranked by verified sales in public records, last 24 months — no agent pays for placement
| Agent | Sales (24 mo) | Median price | Avg DOM | Sale÷list | Price cuts |
|---|---|---|---|---|---|
| Mariah Cosio | 7 | $412K | — | — | — |
| Joanne Ortiz | 4 | $393K | 75 | 98.3% | 67% |
| Esther Viera | 2 | $453K | — | — | — |
| Carlos Marquez | 5 | $515K | 13 | 100.1% | 0% |
| Claudia Lomeli | 3 | $543K | — | — | — |
| Blanca Quinones | 10 | $580K | — | — | — |
Frequently asked questions
How many homes has Mariah Cosio sold?
Mariah Cosio has 18 publicly recorded closed transactions in 2023–2026, including 7 in the last 24 months (8 representing sellers, 10 representing buyers over the full period).
What price range does Mariah Cosio work in?
Mariah Cosio's closed sales have a median price of $412,000; the middle 50% of transactions fall between $383,750 and $606,756.
Is Mariah Cosio's license active?
Mariah Cosio holds an active California DRE license (#02032322). License status can be verified on the California DRE public lookup.
What do Mariah Cosio's reviews say?
Client testimonials highlight successful transactions, such as helping five members of the Cardenas family purchase real estate and assisting the Dominguez family in securing a home within three months. Clients express gratitude for her ability to understand specific needs, such as finding remodeled homes in beautiful communities, and appreciate her support throughout the home buying process.
Data window 2023–2026, computed 2026-07-11 · Dispute or correct this data · *our public sales record begins 2023; Mariah's career may predate it