Months of Inventory, Explained Without the Jargon

Real estate reports contain plenty of statistics.

Median price.

Days on market.

Pending sales.

Sale-to-list-price ratio.

But one of the most useful—and frequently misunderstood—is months of inventory, sometimes called months of supply.

The phrase sounds complicated.

The idea is not.

Months of inventory is simply an estimate of how long it would take buyers to purchase all the homes currently for sale if no additional properties came onto the market and homes continued selling at the current pace.

It helps answer a fundamental question:

Are there more homes available than buyers are currently absorbing—or fewer?

A Simple Example

Imagine a community has:

• 40 homes for sale

• Buyers purchasing roughly 20 homes per month

At that pace, there are approximately:

2 months of inventory.

Now imagine there are still 40 homes available, but buyers are purchasing only 10 per month.

Suddenly there are:

4 months of inventory.

Nothing necessarily happened to the houses.

What changed was the relationship between supply and demand.

That relationship is what makes months of inventory so useful.

What Does the Number Mean?

Rules of thumb vary somewhat by market and by the methodology being used, but generally:

Low inventory: Sellers have more leverage because buyers have fewer alternatives.

Increasing inventory: Buyers gain choices and sellers begin competing more directly with one another.

Higher inventory: Buyers generally gain greater negotiating power and sellers may need more patience.

Northwest Multiple Listing Service generally describes approximately four to six months of inventory as a balanced market. In July 2026, the entire NWMLS service area had approximately 3.74 months of inventory. That was still below the traditional balanced range, but substantially more supply was available than a year earlier.

Why Months of Inventory Can Change So Quickly

There are two sides to the equation:

How many homes are available?

and

How quickly are buyers purchasing them?

Months of inventory rises when:

• More sellers list homes

• Fewer buyers purchase homes

• Or both happen at the same time

It falls when:

• Inventory decreases

• Buyer activity increases

• Or both occur simultaneously

This is why months of inventory often provides more information than simply counting listings.

Fifty homes for sale could represent a very tight market if 100 homes are selling every month.

The same 50 listings could represent a much slower market if only five sell each month.

Lake Forest Park Gave Us a Great Example in July

July 2026 provided a particularly interesting example close to home.

Lake Forest Park residential inventory jumped to approximately 3.0 months of supply.

That was:

• About 76.5% higher than June

• About 150% higher than July 2025

• More than double its trailing 12-month average of roughly 1.4 months

On the surface, that sounds like an enormous market shift.

And it was meaningful.

But understanding why it happened is more important than simply reading the percentage.

More Homes Came Onto the Market

Lake Forest Park had 30 residential homes for sale in July.

That was approximately:

• 67% more than June

• 150% more than July 2025

New listings also surged.

Twenty-five properties came to market during July, nearly double the number from June.

That meant buyers suddenly had substantially more choices.

At the Same Time, Fewer Sales Closed

Only seven Lake Forest Park residential sales closed in July.

That was approximately 56% fewer than in June.

So we had both ingredients that push months of inventory upward:

More homes available + fewer completed sales.

That is why the supply number moved so dramatically.

Did Lake Forest Park Suddenly Become a Weak Market?

No.

And this is where interpreting the data becomes important.

Despite the increase in inventory, the median Lake Forest Park home that sold in July still went under contract in only seven days.

Sellers also received approximately 100% of their original asking price.

Those are not numbers that normally describe a market where buyers have disappeared.

Instead, the data suggests something more nuanced:

Buyers had considerably more choices, but desirable and correctly priced homes were still attracting demand.

That distinction matters.

Why Small Cities Produce Bigger Statistical Swings

Lake Forest Park also demonstrates another important lesson.

Small markets can produce dramatic percentages.

Lake Forest Park recorded only seven residential closings in July.

Imagine that number had instead been 14.

The interpretation of the month's inventory statistics would look dramatically different—even though we're talking about only seven additional transactions.

Compare that with a major metropolitan area where hundreds or thousands of homes trade each month.

A change of seven sales barely moves the needle.

In a smaller community, it can change the headline substantially.

That is why monthly numbers for places such as Lake Forest Park should always be viewed alongside longer-term trends.

Price Range Can Change the Story Too

Months of inventory is not only different from city to city.

It can vary dramatically within the same city.

Imagine a market where:

• Homes below $800,000 have 1.5 months of inventory

• Homes between $1 million and $1.5 million have 3 months

• Homes above $2 million have 8 months

Calling the entire city either a “seller's market” or a “buyer's market” would miss most of the useful information.

A seller with a $750,000 home and a seller with a $2.5 million home may be operating in completely different competitive environments.

That is why price range matters.

Property Type Matters

The same applies to property type.

Single-family homes may have very limited supply while condominiums have significantly more.

Waterfront homes may behave differently from interior properties.

New construction may compete differently from older homes.

Even within one ZIP code, buyers may have very different amounts of choice depending on what they are looking for.

Neighborhoods Can Behave Differently From Cities

Citywide numbers are useful for understanding broad direction.

They are much less useful for pricing an individual home.

Lake Forest Park provides a good example.

A remodeled mid-century home on a usable wooded lot may compete with a very different group of homes than:

• A waterfront property

• A steep-slope home

• A fixer

• A newer construction property

• A home with deeded beach access

All of those properties may technically appear in the same city statistics.

Buyers do not necessarily consider them interchangeable.

What Rising Inventory Means for Sellers

Increasing months of inventory is important for sellers because it changes the competitive environment.

When buyers have few choices, a home can sometimes overcome:

• Aggressive pricing

• Average photography

• Deferred maintenance

• Limited showing availability

• Less-than-perfect presentation

As inventory rises, buyers can compare alternatives.

That creates a very different conversation:

“Why should I buy this home instead of the three others I toured today?”

For sellers, that makes several things increasingly important:

• Pricing correctly at launch

• Addressing obvious maintenance

• Preparing the exterior

• Professional photography

• Strong online presentation

• Easy showing access

Rising inventory does not mean homes cannot sell successfully.

It means sellers have to compete more deliberately.

What Rising Inventory Means for Buyers

For buyers, increasing inventory can be welcome news.

More supply may provide:

• More properties to compare

• Less pressure to compromise

• More time to evaluate options

• Greater opportunity for inspections

• Potential negotiating leverage

• More choices between neighborhoods

But buyers should not assume that every property becomes negotiable.

Lake Forest Park demonstrates this perfectly.

Inventory increased dramatically in July, yet homes that sold still moved quickly.

The best properties can remain competitive even as the broader market becomes more balanced.

Why This Number Is More Useful Than Headlines

Housing headlines often try to reduce a market to one sentence:

“Prices are falling.”

“Inventory is rising.”

“It's a seller's market.”

“Buyers are back.”

Real markets are more complicated.

Months of inventory helps provide context because it combines supply with the pace of demand.

But even that number should not be viewed alone.

I prefer to look at it alongside:

• Active listings

• New listings

• Pending sales

• Closed sales

• Days on market

• Sale-to-list ratio

• Price trends

Together, those numbers provide a much clearer picture.

Lake Forest Park's July Numbers Tell a Story

Taken together, July's numbers say something more interesting than simply:

“Inventory jumped.”

They tell us:

• Sellers brought significantly more homes to market.

• Buyers suddenly had far more choices.

• Fewer transactions closed during the month.

• Months of inventory increased substantially.

• Yet well-positioned homes continued selling quickly.

• Sellers were still achieving approximately their original asking prices.

That is a market becoming more competitive for sellers without necessarily becoming a bad seller's market.

There is a big difference.

The Bottom Line

Months of inventory is one of the best tools for understanding whether supply or demand currently has the upper hand.

But the number does not exist in a vacuum.

A jump in inventory can come from more listings, fewer sales, or both.

And in smaller cities like Lake Forest Park, a relatively small number of transactions can cause surprisingly large percentage swings.

That is why the best question is not simply:

“How many months of inventory do we have?”

It is:

“Why did the number change—and what does that mean for this particular home?”

That second question is where market statistics become genuinely useful.