South St. Louis County is not one market. It is nine communities spanning a $370,000 price range, two school districts, and buyer profiles that range from first-time buyers to premium move-up households. Here is how the whole picture fits together.
What South County Actually Is
South County is the informal name for the southern portion of St. Louis County. It is not a municipality, a school district, or a zip code. It is a geographic and cultural shorthand that buyers, agents, and longtime residents use to describe a cluster of communities south of I-44 and the River Des Peres that share a broadly suburban character and similar daily-life infrastructure.
The nine communities in this guide — Affton, Concord, Crestwood, Green Park, Lemay, Mehlville, Oakville, Sappington, and Sunset Hills — are what most buyers mean when they say "South County." They span a median home value range from $152,000 to $523,000. They are served by three school districts. And they sit in different positions on the competitiveness spectrum — some of the hottest markets in the entire state of Missouri, and some of the most patient.
South County vs. South City
South City refers to the southern portions of the City of St. Louis — a separate political entity with its own tax structure, school system, and housing stock. South County is South St. Louis County. They share a border but are different markets. If you are searching both, understand you are searching two distinct markets.
How Competitive Is South County Right Now?
Several South County communities rank among the most competitive real estate markets in the entire state of Missouri based on Redfin data for January through October 2025. This is not a slow suburban market. Buyers who show up without pre-approval and a clear strategy lose deals.
| Community | State Rank (Competitiveness) | Sale-to-List Ratio | Avg. Days on Market | % Above List Price |
|---|
| Crestwood | #1 in Missouri | 103.7% | ~10 days | 56.7% |
| Mehlville | #5 in Missouri | 102.4% | ~10 days | 68.6% |
| Affton | #7 in Missouri | 102.6% | ~14 days | 60.9% |
| Concord | #10 in Missouri | 101.9% | ~15 days | 48.4% |
| Oakville | #11 in Missouri | 101.4% | ~15 days | 47.3% |
| Sunset Hills | Not in top 20 | — | Longer | — |
Mehlville has the highest rate of homes selling above list price in the entire South County group — 68.6%. That is a buyer who loses one in three offers to someone who paid more. If you are targeting Mehlville, you need to understand that before your first showing.
In South County's most competitive markets, pre-approval is the minimum. Here's what it actually involves. How to Get Pre-Approved for a Mortgage in St. Louis →
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The Nine Communities: Mapped by Price Tier
Every median value below is from U.S. Census Bureau data (2020–2024 estimates). Actual current sale prices vary — verify with current MLS data before budgeting.
Lemay
~$152K median · 77.1% owner-occupied
South County's most accessible entry point. Older housing stock, Jefferson Barracks Park access, Mississippi-side location. Rewards buyers who prioritize payment over prestige.
Mehlville SDEntry tier
Affton
~$212K median · 80.8% owner-occupied
Practical South County with mature housing, Grant's Trail access, and a market that moves quickly. Ranked #7 most competitive in Missouri — buyers need to be ready.
Affton SDHot market
Mehlville
~$218K median · 66% owner-occupied
District namesake community — 7.47 square miles of core South County. #5 most competitive in Missouri with 68.6% of homes selling above list price. Know before you tour.
Mehlville SDHot market
Sappington
~$297K median · 74.5% owner-occupied
Compact Lindbergh-side community — buyers discover it mid-search rather than at the start. The middle path between entry-level South County and premium Sunset Hills pricing.
Lindbergh Schools
Concord
~$303K median · 86% owner-occupied
Sits in a Lindbergh/Mehlville district overlap zone — which block determines which district. Ranked #10 most competitive in Missouri. District verification is essential here.
Lindbergh (Concord Village)Mehlville (most areas)Hot market
Crestwood
~$319K median · 87.7% owner-occupied
The #1 most competitive market in all of Missouri. 103.7% sale-to-list ratio, homes selling in ~10 days. Lindbergh Schools. Whitecliff Park. This market does not wait.
Lindbergh SchoolsHottest in Missouri
Oakville
~$318K median · 86% owner-occupied
South County's largest community at 15.88 square miles. River-edge geography, Bee Tree and Cliff Cave parks, broad inventory across Mehlville School District. Ranked #11 most competitive in Missouri.
Mehlville SDCompetitive market
Green Park
Small incorporated city · 2,705 population
One of South County's smallest cities — 1.31 square miles positioned between I-55, Lindbergh, and Tesson Ferry. Niche choice: buyers usually find it through a specific listing, not a broad search.
Mehlville SDNiche market
Sunset Hills
~$523K median · 82.9% owner-occupied
South County's premium suburb — larger lots, lower density, Laumeier Sculpture Park, Lindbergh Schools. A different monthly payment world than the rest of this list.
Lindbergh SchoolsPremium tier
School Districts: The Decision That Changes Everything
Before you decide on a neighborhood, decide whether school district matters to you — and if it does, understand that district assignment in South County is an address-level question, not a neighborhood-level question.
The three districts serving South County buyers are Lindbergh Schools (93.5% APR score), Mehlville School District (91.7% APR score), and Affton School District. Both Lindbergh and Mehlville are top performers. The difference shows up in the price premium: Lindbergh-assigned communities command a meaningful premium over comparable Mehlville-assigned homes.
The full district comparison — which neighborhoods feed into which district, and how to verify before you offer. Lindbergh vs. Mehlville School District: What South County Buyers Need to Know →
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Which Buyer Profile Fits Which Community
The most common mistake South County buyers make is starting with a community name instead of starting with their actual situation. Here is a cleaner way to think about it:
- First-time buyer, budget under $200K: Lemay and Affton are the realistic options. Both reward buyers who inspect carefully and buy for condition over brand name.
- First-time or move-up buyer, $200K–$280K: Mehlville is the primary market. High competition — you need pre-approval and a willingness to move quickly.
- Move-up buyer, $280K–$330K, Lindbergh priority: Sappington is the underrated option. Less competition than Crestwood, same district.
- Move-up buyer, $280K–$330K, flexible on district: Concord and Oakville both sit in this range. Concord in the Lindbergh footprint commands a premium; Oakville gives you more inventory in the Mehlville district.
- Move-up buyer, Lindbergh and ready to compete: Crestwood is the target — but understand it is the hottest market in Missouri. You will compete.
- Premium buyer, $450K+: Sunset Hills is the South County option. Larger lots, lower density, Lindbergh Schools, and a price point that filters the buyer pool significantly.
Every South County community mapped side by side by price, market speed, and what your dollar actually buys. South County Neighborhoods by Price: The Full Spectrum →
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The three most-searched South County communities compared directly. Mehlville vs. Oakville vs. Concord: Which Is Right for You? →
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Oakville is 15.88 square miles and the southwest and west sides are not the same market. Buying a Home in Oakville, MO: What You Need to Know →
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Before You Start Searching
Three things matter more than picking a neighborhood name:
- Know your actual budget — not what you're approved for, but what the monthly payment looks like at current rates including property taxes, insurance, and PMI if applicable. South County property tax rates vary significantly by zip code and municipality.
- Get pre-approved before you tour. In Crestwood, Mehlville, and Affton especially, the window between seeing a home and needing to write an offer can be 24 to 48 hours. Buyers who tour without pre-approval lose deals.
- Verify school district by address before you fall in love with a home. In Concord especially, the district can shift block to block. The listing description is not a reliable source.
Property taxes vary significantly across South County zip codes and change your monthly number more than most buyers expect. St. Louis Affordability by Zip Code →
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Cash to close is more than the down payment. Here's what South County buyers actually need at the table. Buyer Closing Costs in St. Louis: The Full Breakdown →
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In a market this competitive, representation matters. Here's what it actually means post-NAR settlement. Do You Actually Need a Buyer's Agent in St. Louis? →
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South County FAQ
What are the best neighborhoods in South County St. Louis?
It depends entirely on your budget and priorities. Crestwood and Sunset Hills are the premium Lindbergh options. Oakville and Concord offer strong value in the $300K–$320K range. Mehlville and Sappington are the mid-range. Affton is the most practical entry point. Lemay offers the most accessible pricing. There is no single best neighborhood — there is the right one for your specific situation.
How much do homes cost in South County St. Louis?
South County home prices run from approximately $152,000 median in Lemay to $523,000 in Sunset Hills. The middle of the market — Oakville, Concord, Crestwood — runs in the $300K–$320K range. These are census median values; actual current sale prices vary.
Is South County St. Louis a competitive real estate market?
Yes. Crestwood ranks #1 most competitive in all of Missouri. Mehlville ranks #5 with 68.6% of homes selling above list price. Affton is #7 and Oakville #11. Pre-approval and a strategy are required — not optional — before touring in South County.
What is the difference between South County and South City?
South City is the southern portion of the City of St. Louis — a separate political and tax jurisdiction. South County is South St. Louis County, which includes the communities in this guide. They share a border but are distinct markets with different tax structures, school districts, and housing stock profiles.
👋
George Kindler
Licensed Missouri Realtor · The Closing Pros LLC · 13 years · 250+ transactions · Marine Corps Veteran
South County is where I spend a significant amount of my time. If you want to talk through which community actually fits your budget and situation — no pitch, straight conversation — I answer directly.
