1. Agent Pronto
  2. Missouri
  3. St. Louis
  4. Katherine Effinger

Katherine Effinger

Main Key Realty LLC

Looking to sell your property, buy a new home, or just need some expert real estate advice?

About
Assisting clients in reaching their real estate goals is my honor. Supporting and guiding decisions with facts and their considerations is paramount to my role in facilitating that process. Whether the sale or purchase involves their home or investment purposes, my dedication to the goal is unwavering.

I live in Jefferson County, Missouri, and work throughout the St. Louis metro area.
Highlights *
12
Recent sales
$14K-$455K
Price range
$200K
Median price
5
Years experience

Recent Listings & Sales

Address Sold Date Sold Price Represented
571 Conestoga Dr
House Springs, MO 63051
3/20/2026 $269,900
Last known list price
Seller
4624 Shirley Pl
Saint Louis, MO 63115
3/20/2026 $19,000
Last known list price
Seller
4624 Shirley Pl
Saint Louis, MO 63115
3/20/2026 $19,000
Last known list price
Buyer
458 Cherry Dr
Ste Genevieve, MO 63670
3/17/2026 $259,000
Last known list price
Buyer
2205 Ashton Hills Ct
Washington, MO 63090
10/24/2025 $287,900
Last known list price
Seller

Transaction History *

Seller Deals

Total Deals
6
Total Value
$1,069,650
Median Sale Price
$273,000
Price Range
$14K - $455K

Buyer Deals

Total Deals
6
Total Value
$858,650
Median Sale Price
$129,000
Price Range
$14K - $280K

Sales Volume Timeline

Katherine Effinger’s production volume for the past 3 year period Q2 ’23 Q2 2023: $0 Q3 ’23 Q3 2023: $58K Q4 ’23 Q4 2023: $294K Q1 ’24 Q1 2024: $0 Q2 ’24 Q2 2024: $280K Q3 ’24 Q3 2024: $0 Q4 ’24 Q4 2024: $0 Q1 ’25 Q1 2025: $0 Q2 ’25 Q2 2025: $0 Q3 ’25 Q3 2025: $455K Q4 ’25 Q4 2025: $281K Q1 ’26 Q1 2026: $560K Q2 ’26 Q2 2026: $0 Q2 2023 Total Sales $0 Q3 2023 Total Sales $58K Q4 2023 Total Sales $294K Q1 2024 Total Sales $0 Q2 2024 Total Sales $280K Q3 2024 Total Sales $0 Q4 2024 Total Sales $0 Q1 2025 Total Sales $0 Q2 2025 Total Sales $0 Q3 2025 Total Sales $455K Q4 2025 Total Sales $281K Q1 2026 Total Sales $560K Q2 2026 (Apr 1-May 20) Total Sales $0

Professional Info

Brokerage

Main Key Realty LLC
114 East Main Street
Festus, MO 63028

Licensed

Licensed REALTOR®
MO 2021008656

Specialties

  • First-time buyers
  • Flipping & rehab
  • Military
  • Recreation & Vacation
  • Relocation

Education

Missouri Baptist University
Bachelor’s Degree, Business Management and Administration
2000 - 2004

Top Cities *

St. Louis

  • 5 sales past 3 years
  • 30 days on market
  • $47.2K median price

Ste. Genevieve

  • 2 sales past 3 years
  • Unknown median price

Festus

  • 1 sales past 3 years
  • Unknown median price

Service Areas (133 cities)

Affton, MO Arnold, MO Ballwin, MO Barnhart, MO Bel-Nor, MO Bel-Ridge, MO Bella Villa, MO Bellerive, MO Bellerive Acres, MO Berkeley, MO Beverly Hills, MO Bloomsdale, MO Boone, MO Breckenridge Hills, MO Brentwood, MO Briarwood Estates, MO Bridgeton, MO Byrnes Mill, MO Cedar Hill, MO Cedar Hill Lakes, MO Champ, MO Charlack, MO Chesterfield, MO Clarkson Valley, MO Clayton, MO Concord, MO Cool Valley, MO Cottleville, MO Country Life Acres, MO Crestwood, MO Creve Coeur, MO Crystal City, MO Crystal Lake Park, MO Dardenne Prairie, MO De Soto, MO Des Peres, MO Ellisville, MO Eureka, MO Farmington, MO Fenton, MO Ferguson, MO Festus, MO Frontenac, MO Glen Echo Park, MO Glendale, MO Grantwood Village, MO Gray Summit, MO Green Park, MO Greendale, MO Hanley Hills, MO Herculaneum, MO High Ridge, MO Hillsboro, MO Hillsdale, MO Horine, MO House Springs, MO Huntleigh, MO Imperial, MO Jackson, MO Jennings, MO Josephville, MO Kimmswick, MO Kirkwood, MO LaBarque Creek, MO Ladue, MO Lafayette, MO Lake St. Louis, MO Lake Tekakwitha, MO Lakeshire, MO Lemay, MO Mackenzie, MO Manchester, MO Maplewood, MO Marlborough, MO Maryland Heights, MO Mehlville, MO Murphy, MO Normandy, MO Northwoods, MO Norwood Court, MO O'Fallon, MO Oakland, MO Oakville, MO Olivette, MO Olympian Village, MO Overland, MO Pacific, MO Pagedale, MO Parkdale, MO Pasadena Hills, MO Pasadena Park, MO Peaceful Village, MO Pevely, MO Pine Lawn, MO Raintree Plantation, MO Richmond Heights, MO Rock Hill, MO Sappington, MO Scotsdale, MO Shrewsbury, MO St. Ann, MO St. Charles, MO St. Clair, MO St. George, MO St. John, MO St. Louis, MO St. Paul, MO St. Peters, MO Ste. Genevieve, MO Summer Set, MO Sunset Hills, MO Sycamore Hills, MO Town and Country, MO Twin Oaks, MO University City, MO Uplands Park, MO Valley Park, MO Velda City, MO Velda Village Hills, MO Villa Ridge, MO Vinita Park, MO Warson Woods, MO Washington, MO Webster Groves, MO Weldon Spring, MO Weldon Spring Heights, MO Wellston, MO Wentzville, MO Westwood, MO Wilbur Park, MO Wildwood, MO Winchester, MO Woodson Terrace, MO

* Sales data is calculated based on transaction information available to Agent Pronto at the time of publishing and may not accurately reflect all transactions for a given agent.