Best Realtors in Cobb, CA (2026 Guide)
By Matthew Martinez
Cobb is an unincorporated mountain community of about 800 people on Highway 175 in south Lake County, between Middletown and Kelseyville. Homes sit among pines and oaks on Cobb Mountain, often on acreage with private wells and septic systems, and buyers include full-time residents and second-home owners.
This guide is published by Diamond Real Estate Group, one of the brokerages listed. Our broker is listed first; other agents are in alphabetical order. The order is not a ranking, and inclusion is not an endorsement.
How we chose the agents in this guide
Each agent below met three checks in October 2026:
- A current California license. We opened each agent’s record on the California Department of Real Estate (DRE) public lookup and confirmed the name, license type (salesperson or broker) and a "Licensed" status with a current broker affiliation.
- A named brokerage. Each agent’s DRE record shows the brokerage they work under.
- A public profile that names Cobb. We opened each agent’s brokerage or listing-site profile and confirmed it names Cobb as a service area.
We did not rank agents, and we did not consider sales volume, reviews or awards. Licenses and affiliations change, so check the license yourself before you sign anything, and interview more than one agent.
Cobb housing in numbers
| Census measure (ACS 2024 5-year) | Cobb CDP |
|---|---|
| Population | 842 |
| Median value of owner-occupied homes | $392,400 (margin of error ±$71,557) |
| Median household income | $120,250 |
| Persons per household | 2.3 |
| Mean travel time to work | 31.5 minutes |
| Housing units | 625 |
Source: U.S. Census Bureau American Community Survey 2024 5-year estimates, as presented by Census Reporter. The Census QuickFacts page did not load when we checked.
Cobb’s Census area is small, so its estimates carry wide margins of error. Even so, both its median owner-occupied value and its median household income are well above the Lake County figures from QuickFacts ($324,300 and $60,621). These are five-year survey figures, not current sale prices; ask an agent for recent sales of similar mountain properties.
Life on Cobb Mountain
Cobb has no city government; Lake County handles zoning and permits. The County’s plans page lists a Cobb Mountain area plan among its eight community plans. Properties range from cabins on small lots to homes on several acres, and many depend on private wells, springs or small water systems and on septic.
For more on the area, see our Cobb real estate guide.
Costs and rules specific to a Cobb purchase
- Transfer tax. Cobb is unincorporated, and the Lake County Assessor-Recorder fee schedule lists the documentary transfer tax at $1.10 per $1,000: about $432 on a $392,400 sale. See our California transfer tax guide.
- Fire hazard and insurance. Look up the address on the State Fire Marshal’s Fire Hazard Severity Zone maps, read the natural hazard disclosure report, and get an insurance quote before you remove contingencies. Ask about defensible space and any home-hardening work.
- Wells, springs and septic. Order well-yield and water-quality tests and a septic inspection, and ask whether the water source is shared with neighbors.
- Roads and access. Many parcels are on private or shared roads; ask for any road maintenance agreement.
- Creek setbacks. The County’s Waterway combining district bars development within 30 feet of perennial streams and 20 feet of intermittent streams unless an exception is granted.
- Short-term rentals. The County announced in July 2026 a committee to help draft short-term rental rules for the unincorporated area.
Cobb agents with verified licenses
Matthew Martinez, Diamond Real Estate Group (publisher of this guide)
Matthew Martinez is the Founder, CEO and Managing Broker of Diamond Real Estate Group. He is based in Sonoma County; contact him to discuss a purchase or sale in Cobb. Contact Matthew · Broker #01869679 · Diamond Group Estates Inc DBA Diamond Real Estate Group, DRE #02163490
| Agent | Brokerage | License | Areas named on profile |
|---|---|---|---|
| Linda Lindeblad | RE/MAX Gold, Lakeport | Broker #00993409 | Cobb, Kelseyville, Lucerne, Nice, Upper Lake |
| Jen Mullin (licensed as Jennifer Mullin) | RE/MAX Gold, Lakeport | Salesperson #01299223 | Cobb, Clearlake, Middletown, Hidden Valley, Lakeport |
| Kimberly Rupp | Navigate RE Co. | Salesperson #01480439 | Cobb, Middletown, Hidden Valley Lake, Kelseyville, Lower Lake, Clearlake, Lakeport |
| Faylen Silva | RE/MAX Gold, Lakeport | Salesperson #01772839 | Cobb, Hidden Valley, Middletown, Kelseyville, Lake County |
| Cynthia Smith (licensed as Cynthia Clemencia Smith) | RE/MAX Gold, Lakeport | Salesperson #01341797 | Cobb, Middletown, Lower Lake, Hidden Valley, Calistoga |
| Diane Sutton | Navigate RE Co. | Salesperson #01313634 | Cobb, Middletown, Hidden Valley Lake, Kelseyville, Lower Lake, Clearlake, Lakeport |
| Jennifer Wall (licensed as Jennifer Aileen Wall) | RE/MAX Gold, Middletown | Salesperson #02037114 | Cobb, Hidden Valley, Middletown, Kelseyville, Lower Lake |
| Shannon Williams | RE/MAX Gold, Middletown | Salesperson #01705168 | Cobb, Middletown, Lower Lake, Hidden Valley, Lake County |
On the DRE record, RE/MAX Gold agents are licensed under Norcal Gold Inc (Linda Lindeblad as a broker associate). Kimberly Rupp’s and Diane Sutton’s profiles are on nexthome.com; their licensing brokerage, Navigate RE Co., is taken from the DRE record.
How to vet a Cobb agent
- Ask how many mountain properties they have sold. Wells, septic, slopes and road access shape value on Cobb Mountain.
- Get an insurance quote first. Ask which carriers are writing policies near the address and what defensible-space work they require.
- Order well, septic and roof inspections.
- Ask about road maintenance agreements on private roads.
- Ask for comparable sales, not Census figures. Cobb’s estimates have wide margins of error.
- Check the license yourself. Confirm a "Licensed" status with a current broker on the DRE lookup.
Cobb questions we hear
Is there a city transfer tax in Cobb?
No. Cobb is unincorporated, so the Lake County rate of $1.10 per $1,000 applies.
Who regulates building in Cobb?
Lake County, under its zoning ordinance and the Cobb Mountain area plan.
Can I get homeowners insurance in Cobb?
Ask an agent and an insurance broker early. Coverage and cost depend on the address, its fire hazard designation and the home’s condition.
Do Middletown agents cover Cobb?
Yes, most profiles in the table name both. See our Middletown agents guide.
Sources & notes
- California DRE public license lookup (individual records linked in the table)
- Census Reporter, Cobb CDP profile (ACS 2024 5-year)
- U.S. Census QuickFacts, Lake County
- Lake County Assessor-Recorder, Schedule of Fees
- Lake County Plans (area plans list)
- Lake County Zoning Ordinance, Article 37 Waterway combining district
- Lake County news: short-term rental ordinance committee (July 6, 2026)
- CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones
- Agent profiles on remax.com and nexthome.com, linked in the table
- License records checked October 2026 on the California DRE public lookup. Last reviewed October 2026 by Matthew Martinez.
Related: Cobb real estate guide · Cobb home valuation · Lake County agents guide · 20 tips for choosing a real estate agent
License-status update: the linked California DRE public records were checked November 2, 2026 and showed "Licensed." Public profile research retains the dates stated above. Names on DRE records may differ from public profile names; verify status and brokerage before selecting an agent.
