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Marietta Housing Inventory: Months of Supply Explained

December 18, 2025

Ever wonder if it is a buyer’s or seller’s market in Marietta right now? One simple number, called months of supply, can tell you a lot about the road ahead. If you are planning a move, you deserve a clear, data-backed read on inventory so you can time your decision with confidence. In this guide, you will learn what months of supply means, how it is calculated for Marietta, and how to use it to plan your next step. Let’s dive in.

What months of supply means

Months of supply shows how long today’s active listings would take to sell at the current sales pace if no new homes came on the market. It is a supply-side snapshot that helps you understand balance.

  • Around 6 months typically signals a balanced market.
  • Below 6 months favors sellers because supply is tight.
  • Above 6 months favors buyers because there is more selection.

Use this as a guide, not a rule. Local price tiers, property types, and seasonality in Cobb County can shift your experience even when the headline number looks balanced.

How to calculate it in Marietta

The basic formula is straightforward:

  • Months of supply = Active listings ÷ Monthly sales rate.
  • Monthly sales rate can be the number of closed sales in the last 30 days or an average across the last 3, 6, or 12 months.

For neighborhood and city-level reporting, a 3‑month rolling average often gives a steadier read than a single month. That helps smooth out holidays, weather, and one-off spikes.

Our preferred local method

  • Geography: City of Marietta and Cobb County for context.
  • Time window: Rolling 3 months for responsiveness, plus a 12‑month trend for seasonality.
  • Status definitions: Active listings only, closed sales by closing date, with consistent treatment of pending and under contract.
  • Breakouts: Price bands and property types, plus new construction vs resale where available.

Why inventory shifts in Marietta

Price tiers behave differently

Entry-level price bands near key commute routes often move faster, which can lead to lower months of supply. Higher-priced segments may carry more months of supply, simply because the buyer pool is smaller. Always compare your specific price range to the overall market.

Property type matters

Single-family homes, townhomes, and condos can have very different supply patterns. A condo community may see quick absorption at some price points while single-family homes run tighter or looser depending on location and condition.

Seasonality in Cobb County

Spring and early summer typically run hotter, with lower months of supply as buyers compete for homes before the new school year. Late fall and winter often see fewer new listings and slower sales, which can shift months of supply upward or down depending on how demand changes.

Commute and job centers

Access to I‑75, I‑285, and Cobb Parkway influences demand across Marietta. Proximity to major employment hubs can compress months of supply in certain neighborhoods because more buyers target those locations.

New construction and permits

New single-family and townhome developments can add inventory in specific pockets and price bands. Building permit trends are an early signal of where supply may grow in the next 6 to 18 months.

Interest rates and investor activity

Mortgage rate changes affect affordability and the pace of sales. Investor purchases and rental market conditions can also change the mix of available homes, especially in entry-level segments.

Local policy and zoning

Rezoning and infill rules can shape future supply, including where townhomes or small-lot single-family homes may appear. Even small shifts can make a difference at the neighborhood level.

What it means for you: sellers

When months of supply is low in your price band:

  • Price with precision. Strategic pricing can spark strong early interest and clean offers.
  • Maximize presentation. Professional visuals and targeted digital marketing help your home stand out when buyers move fast.
  • Prepare for speed. Have disclosures, showings, and timeline plans ready so you can respond quickly to interest.

When months of supply rises in your price band:

  • Lean into differentiation. Refresh curb appeal, complete key repairs, and consider minor updates that improve first impressions.
  • Adjust faster. Watch feedback and market signals, and be willing to reposition pricing sooner rather than later.
  • Expand reach. Amplify to the broadest qualified buyer pool across digital and social channels.

What it means for you: buyers

When months of supply is low in your price band:

  • Get fully underwritten or pre-approved before touring.
  • Tour early and often. Be ready to write a clean, timely offer on the right fit.
  • Focus on value. Target well-priced homes and avoid overpaying for homes that are simply mispositioned.

When months of supply is higher in your price band:

  • Take your time. Compare options and watch price improvements.
  • Negotiate with data. Use days on market and condition to structure credits or repairs.
  • Keep financing strong. Sellers still prefer certainty, even in buyer-leaning segments.

How we report Marietta inventory

To keep guidance accurate and actionable, we use the following approach for months of supply in Marietta and Cobb County:

  • Primary data: Local MLS (FMLS/Georgia MLS) for active, pending, and closed sales, filtered to city and price band.
  • Calculation: Active listings divided by the average monthly closed sales over the prior 3 months, plus a 12‑month trend for context.
  • Breakouts: Price tiers, property types, and new construction vs resale when available.
  • Context metrics: Median days on market and percent of list price received.
  • Timing: Note the data-pull date and revisit numbers regularly, especially when rates move.

We can also produce visuals like a 12‑month trend line for months of supply, a bar chart by property type, and a price-band comparison so you can see your segment at a glance.

Your next step

Whether you are buying or selling, months of supply is a starting point. The right strategy depends on your price range, property type, and timeline. If you want a tailored read on Marietta today, we will pull the latest MLS numbers, break them out by your segment, and translate them into a clear plan.

Ready to move forward with confidence? Reach out to The Chrismer Group for a personalized, data-backed consultation. Hablamos Español e Português.

FAQs

What is months of supply in real estate?

  • It is the number of months it would take to sell all current active listings at the current sales pace if no new homes were listed.

How do you calculate months of supply for Marietta?

  • Divide active listings by the monthly sales rate, using a rolling 3‑month average of closed sales for stability at the city and price-band level.

What number signals a buyer’s or seller’s market in Cobb County?

  • Around 6 months is often balanced; below favors sellers and above favors buyers. Always compare your price band and property type for a true read.

Does seasonality change months of supply in Marietta?

  • Yes. Spring and early summer usually run tighter due to higher demand, while late fall and winter often show different dynamics. Compare year over year where possible.

How should I act if supply is low in my price band?

  • Buyers should secure strong pre-approval and move quickly on good fits; sellers should price precisely, present beautifully, and prepare for faster timelines.

How should I act if supply is high in my price band?

  • Buyers can compare more options and negotiate strategically; sellers should differentiate through condition, marketing, and timely price adjustments.

What data sources inform your Marietta inventory updates?

  • We use local MLS data for counts and closings, with supplementary context from regional market reports and local permit trends, all noted with the data-pull date.

Work With Us

With a blend of local expertise and personalized service, our team guides you through every step of your real estate journey in Alpharetta and the surrounding areas.