Myth vs Fact: Building in Seattle When Mortgage Rates Top 7%

If you have been thinking about a remodel, a backyard cottage, or a few new homes on your lot, this fall's headlines may have you hitting pause. The 30-year fixed mortgage rate reached 7.40% on October 8, according to Freddie Mac data, the seventh weekly increase in a row and the highest level since November 2023. Seattle permit fees are set to rise again. Material prices keep climbing.

It is a lot. But a slow market is also when the best-prepared owners get ahead. Here are six things we hear often, and what the facts say.

This post is general information, not financial or legal advice. Talk with your lender, tax advisor, or attorney about your situation.

Myth 1: "I should wait for rates to drop before I do anything."

Fact: Waiting to build may make sense. Waiting to plan usually does not.

Design and permitting in Seattle take months, and complex projects can take longer. If you start design now, you can be ready to break ground when financing improves, instead of starting the clock then. Early design also gives you real numbers to bring to a lender, which makes every rate conversation more useful.

Myth 2: "Permit fees are the main reason projects don't pencil."

Fact: Fees matter, but they are rarely the biggest line item.

Mayor Wilson's proposed 2027 budget raises SDCI building and land use permit fees by 7% on top of a 3.7% inflation adjustment, after an 18% increase in 2026. The Urbanist estimates permit fees for a four-unit townhouse project rising from $12,214 in 2025 to $15,953 in 2027.

That is real money. But for many small projects, utility requirements such as water main replacement and underground power can cost far more. For a 230-unit building, The Urbanist reports MHA fees may exceed $3 million, roughly ten times the permit fees. The lesson: look at the whole cost picture before deciding a project will or will not work.

Myth 3: "Construction costs have peaked."

Fact: Not yet, by the latest national data.

The Associated General Contractors of America reports that input prices for nonresidential construction rose 7.1% from July 2025 to July 2026. Steel mill products were up 22.5%, aluminum 40.5%, copper and brass 18.4%, and lumber and plywood 9.9%, the largest lumber jump since March 2022. AGC points to tariffs of up to 50% on some metals as a major driver.

What this means for you: design choices matter more than ever. Simple structural spans, efficient framing layouts, and fewer custom metal details can protect your budget without making a home feel cheaper.

Myth 4: "The MHA fee break is a done deal."

Fact: It is a proposal, and the vote is months away.

Councilmember Dionne Foster's Housing Accelerator would cut Mandatory Housing Affordability fees by 80% for stalled projects that already have vested permits, and by 60% for new projects that include at least 25% two-bedroom units. It would exclude much of the Chinatown-International District, Central District, and Rainier Valley, except for legacy homeowners. A final vote is not expected until January 2027.

If you are planning a project, do not build your budget around a discount that does not exist yet. Plan for today's rules and treat any relief as upside.

Myth 5: "Nothing is getting built in Seattle right now."

Fact: Big projects slowed. Small ones did not disappear.

SDCI expects 2026 master use permit applications, the kind large projects need, to land about 60% below 2019 levels. Construction permit volume is closer to 15% below 2019, with projects trending smaller. That shift is exactly where homeowners, small builders, and community organizations live: ADUs, additions, townhomes, and fourplexes.

Myth 6: "New building codes already changed the rules."

Fact: Washington's 2024 codes are coming, but the 2021 codes still apply for now.

The State Building Code Council delayed implementation of the 2024 codes, with an effective date of May 3, 2027. Until then, the 2021 codes remain in effect. If your project could straddle that date, talk with your architect about which code set you will vest under and how that affects design.

How to move forward with confidence

Get a feasibility read first

A short feasibility study can tell you what your lot allows, what the major cost risks are, and whether a remodel, ADU, or multi-unit approach fits your goals.

Separate design decisions from financing decisions

You can finish schematic design and even permitting while you watch rates. Many owners find that having a permit in hand gives them more options, not fewer.

Build in flexibility

Design for phases. A basement unit now and a backyard cottage later can spread cost over time and let you respond to the market.

Spend where people live

When budgets are tight, put money into light, layout, and durable finishes. Those are the things residents feel every day.

Let's plan your next move together

Uncertain markets are easier with a partner. La Union Studio helps Seattle and South King County owners understand what is possible, what it may cost, and when to move. Book a consultation and we will walk through your goals, your lot, and a realistic path forward.

FAQ

Is it a bad time to build in Seattle with mortgage rates over 7%? Higher rates raise borrowing costs, but design and permitting take months. Many owners use slower periods to plan and permit so they are ready when financing improves. Talk with a lender about your situation.

How much are Seattle permit fees going up in 2027? The proposed 2027 budget raises SDCI building and land use permit fees by 7% above a 3.7% inflation adjustment, after an 18% increase in 2026. The City Council expects to adopt the budget in November 2026.

When do Washington's 2024 building codes take effect? The State Building Code Council set May 3, 2027 as the effective date. The 2021 codes remain in effect until then.

Sources

Trading Economics: US Mortgage Rates Climb Further in October (Freddie Mac data) · The Urbanist: Seattle Permit Fees Get Another Hike Amid Development Slump (Oct 1, 2026) · SDCI Building Connections: Mayor Wilson's 2027-2028 Proposed Budget for SDCI · AGC: Construction Input Costs Climb 7.1% (Aug 13, 2026) · The Urbanist: Foster Resurrects Housing Accelerator (Sep 16, 2026) · The Building Code Forum: Washington State Building Codes, 2024 Adoption Delayed to 2027