Is a Slow Housing Market the Right Time to Design? A Seattle Q&A for Fall 2026

The headlines this fall sound like a reason to wait. Seattle has more homes for sale than it has had in years, mortgage rates have climbed back above 7%, and the city is proposing higher permit fees for 2027. We hear the same question from homeowners almost every week: should we hold off?

Our answer is usually no, with an important distinction. A slow market can be a poor time to rush into construction on borrowed money, and a very good time to design. Here is how we think about it. This is not financial advice; talk with your lender and financial advisor about your own situation.

What is actually happening in the Seattle market?

The market has tilted toward buyers. In September, Seattle had 1,959 active single-family and townhome listings, up about 20% from a year earlier, and supply reached 3.8 months, the highest in 15 years, according to Urban Living data reported by Seattle Red. The median price for those homes was $925,000, down 2.3% year over year.

Across the 27 counties NWMLS covers, closed sales were the fewest for any September in 12 years, and supply reached 4.44 months. Four to six months is generally considered balanced.

And mortgage rates?

Rates moved the wrong way for buyers this fall. The average 30-year fixed rate rose from 6.71% on September 3 to 7.28% in early October. On a $925,000 home with 20% down, that adds about $283 a month in principal and interest, by Seattle Red's math.

Why would anyone design during a slowdown?

Because design and construction run on different clocks. A thoughtful remodel, addition, or ADU often takes months of design and permitting before anyone breaks ground. If you start design now, you are positioning your project to build when conditions may look different, rather than starting the clock when everyone else does.

Permitting takes time either way

Seattle permitted fewer than 2,000 housing units in 2025, roughly 88% below the 2020 peak, according to The Urbanist. Fewer applications have not made the process simple. SDCI plans to cut 34 fee-funded positions as permit revenue falls, so review capacity is shrinking too. Having a complete, well-coordinated set of drawings remains the best way to avoid back-and-forth.

Are permit fees going up in 2027?

Probably. Mayor Katie Wilson's proposed budget would raise SDCI building and land use permit fees 10.7%, following an 18% increase the year before. The Urbanist estimates permit fees for a four-unit townhouse development would rise from $12,214 to $15,953 over two years. The Council expects to adopt a balanced budget by Thanksgiving, so the final numbers may shift.

Should I rush to submit before fees rise?

Not if it means submitting incomplete plans. Corrections cost time and money. If your design is close, it is worth asking your architect whether you can reach a complete submission before the new fee schedule takes effect. If you are just starting, focus on a strong design and plan for the 2027 fees in your budget.

What about construction costs and tariffs?

Material costs remain a real concern. The Associated General Contractors of America reported that prices for inputs to new nonresidential construction rose 7.1% from July 2025 to July 2026, citing war and tariffs. Residential projects feel similar pressures on items like steel, copper, and imported finishes.

How we design around cost uncertainty

• Lock in big decisions early, such as structure, layout, and window sizes, so pricing can be tested sooner.
• Choose finishes with a domestic or regional alternate in mind.
• Price the project in phases so you know what can be deferred.
• Leave a realistic contingency. In this environment, we suggest planning for more than you think you need.

Is now a good time to buy a fixer or a lot?

It may be a better time to negotiate than it has been in years. With longer days on the market and fewer bidding wars, buyers have more room to ask for inspections and contingencies. As one NWMLS board member told Seattle Red, "The days of multiple offers with no contingencies are behind us for most homes."

If you are considering a property for an ADU, a remodel, or middle housing, a short feasibility study before you buy can tell you what the lot can hold under Neighborhood Residential zoning, what utilities may cost, and whether the numbers work.

What if I already own my home?

Then a slower market can make staying and improving more attractive. If your current mortgage rate is well below today's rates, moving may cost more each month than a well-planned addition or ADU. We walk through that decision in our earlier guide on whether to remodel, add, or move.

Let's use this window well

At La Union Studio, we help homeowners and small builders get design and permitting done thoughtfully, so they are ready to build when the timing is right. Book a consultation and we will talk through your goals, your budget, and a realistic timeline for 2027.

FAQ

Is fall 2026 a good time to start designing a remodel or ADU in Seattle?

For many homeowners, yes. Design and permitting can take months, so starting now positions you to build when conditions improve. Whether to finance and build right away depends on your rates and budget, so check with your lender. This is not financial advice.

How much are Seattle permit fees going up in 2027?

The proposed 2027 budget would raise SDCI building and land use permit fees 10.7%, after an 18% increase the year before. The Council is expected to adopt the budget by Thanksgiving, so confirm final figures with SDCI.

Is Seattle a buyer's market right now?

It is leaning that way. Seattle single-family and townhome supply reached 3.8 months in September 2026, the highest in 15 years, and the NWMLS region reached 4.44 months, close to balanced territory.

Sources: Seattle Red: Seattle home listings hit 15-year high · The Madrona Group: Seattle Market Update October 2026 · The Urbanist: Seattle permit fees get another hike · The Urbanist: MHA Housing Accelerator proposal hits process snag · AGC: Construction input costs rise 7.1% · Seattle King County REALTORS: Issues and Impacts Q3 2026