At Reality Homes, a refrain we hear often from potential customers is how they’re planning on building or buying a home, but are just “waiting a bit for mortgage rates to drop.” 

It’s understandable: Higher mortgage rates means spending more from the start, which anyone would reasonably want to avoid. But unfortunately, interest rates don’t live in a vacuum — prospective homeowners in an area like the Pacific Northwest need to navigate a fast-moving market with many other variables, high demand, rising materials prices, and unpredictable rates. Not to mention, like we saw during the peak of the pandemic, the moment interest rates lower, demand spikes and prices go up anyway — sometimes dramatically. 

Let’s look at the principles and math behind why waiting to build a house can backfire financially, factors to consider, and action steps you can take. 

How interest rates affect home building — in the Pacific Northwest and beyond 

First off, let’s define interest and mortgage rates. 

Interest rates: Rates for loan repayment that originate with the rate set by the Fed which then influences mortgage rates, construction loans, and overall credit. 

Mortgage rate: The percentage interest you pay on your long-term home loan. 

So of course, it absolutely makes sense that someone would want a lower interest rate on their mortgage! A lower interest rate means paying less each month in interest, which adds up over time. 

For a custom home loan, the loan rates can be more of a sticking point than for a typical home purchase mortgage; this is because, instead of a standard mortgage, you’ll use a custom home loan — usually a construction-to-permanent loan — which are typically more sensitive to interest rate changes. 

There are a few different common financing structures: 

First and most common is a loan to build your own house, AKA a construction-to-permanent loan or one-time close loan. 

For a construction-to-permanent loan, there are two phases: During construction, you pay interest-only on the amount drawn. Post-construction, the loan automatically converts into a long-term mortgage with principal and interest payments. 

This type of loan is especially well-suited for environments with volatile interest rates; it’s particularly popular for people building on more rural land plots. 

Second are two different custom home mortgage options: 

• Two-time close loan: a construction loan during that phase, then a separate long-term mortgage after the home is built. 

• Lot and construction package: combines land acquisition and construction costs into a single loan. 

Third is custom home builder financing offered by local builders or lenders. 

Again, these come in a couple different versions: 

• Builder-backed loans, where the builder fronts the construction cost 

• Preferred lender programs, where the builder partners with a trusted lender 

Preferred lender programs can also sometimes have financing incentives, including paid closing costs, interest rate buy-downs, and rate locks. 

So these are all of your most common options, but what does it look like in practice? Let’s take a quick look at an example. 

Not considering taxes, fees, or insurance, just to keep it simple: Take a $750,000 Seattle home — over $100,000 below the city’s median home price as of July 2025 — with a 6.5% interest rate. With a down payment of 15%, your monthly payment would be about $4,030. The same home with the same down payment but at a 7.5% interest rate on the mortgage would be about $4,460 per month. 

Again, this is a simplified version of the expenses, but that’s a savings of $430 per month, over $5,000 per year, and $154,800 over the 30-year lifetime of the loan! 

Add in the taxes and potential private mortgage insurance for a less-than-20% down payment, and that difference becomes more drastic. 

So yeah, it’s understandable you’d be tempted to gamble on that 7.5% mortgage rate maybe coming down in the future. Here’s why that can backfire: 

The pitfalls of trying to time the market — and the Pacific Northwest’s unique regional pressures that add to the cost 

So, with how beneficial a lower interest rate is to your wallet, why wouldn’t you want to wait for interest rates to drop? At the most basic: because it’s not that easy, not that likely, and other expenses will go up while you’re chasing savings that might never arrive. 

Some people want to cling to what is most likely a myth: “Interest rates will come back down soon.” 

It is true that they may ideally stabilize sooner or later, but most financial experts agree that we’re unlikely to return to the mega-low 2020, 2021 rates that were set to help offset the economic shock of the peak of the pandemic. And for many, the memory of those low rates is at least partially powering the temptation to wait. 

Unfortunately, the very likely risk here is that you wait six months or a year to “time the market” with the hope of a lower mortgage rate, only for the rate to potentially stay roughly the same or drop only somewhat; meanwhile in that span, home prices and land prices are almost certainly going up in your market. 

In the Pacific Northwest, that’s certainly the case — for example, Boise or the Willamette Valley, where prices are climbing faster than rates are dropping (or reasonably could be expected to in the future). 

And that’s not even considering that materials costs are liable to rise with tariffs and disruption to supply chains, plus potentially the same with labor costs from disruptions to labor supply given our current political happenings. 

To summarize, by waiting, you are not only not guaranteed a lower mortgage rate, but you’re likely facing increased: 

• House prices 

• Land prices 

• Material prices 

• Labor prices 

Not to mention, the moment interest rates go down, demand almost always spikes with it, rising home prices even further. 

But don’t fret! 

There is a way to almost get the best of both worlds, which is remembering that, by starting now, you can work with today’s prices while setting up to refinance later when interest rates potentially do come down. 

Basically: Rates come down sometimes — but construction costs and land prices almost never do. 

The PNW effect: What’s adding to our costs here? 

Of course, our home in the Pacific Northwest is seeing one of the most dramatic increases in housing price across the continent. In-demand sections of the interior like Spokane, the Tri-Cities, and Bend are seeing prices and land availability fluctuating monthly. 

Some of this stems from universal problems that most (if not all, even) of the country is dealing with, while other factors are more unique or at least are more dramatic problems here. Let’s take a look at a few specifics: 

• People want to live here! It’s an understandable “problem” that those of us who’ve been around for a while totally get: The Pacific Northwest is a dang good place to live. While we’ve been pretty isolated from the rest of the country for most of our history, the secret’s pretty much out now and we can’t blame anyone for wanting to live here. What that does mean, though, is basic economics in action: More people means greater demand, which raises prices. 

• Material price volatility: Post-COVID, we’ve seen increases to the price of framing lumber, electrical, HVAC, and concrete, all of which have gone up between 10 to 25% in the last 12 to 18 months alone. These are liable to potentially get worse with supply chain uncertainty and tariffs. That’s not unique to the PNW of course, but these stressors do exacerbate the costs we see from increased demand. 

• Labor shortages: This is particularly an issue in rural parts of the PNW like rural Idaho and lots of Eastern Oregon. And, as mentioned above, this could become seriously exacerbated as many labor markets become impacted by the threat of mass deportations. 

• Permitting and zoning delays: On the flip side, many more populous parts of the PNW are especially impacted by delays here. Which, while you wait, costs tend to go up! Portland, Boise, and much of Seattle’s King County and the surrounding Puget Sound area feel this the most. 

Not only do these factors increase cost, but through extension they often mean having to compromise on things you wouldn’t otherwise. For example, you might have to forego certain customizations, like premium design features or energy-efficient upgrades to stay within budget. 

The math behind waiting, and actionable steps you can take right now 

Let’s take a look at what you’d get from betting on the wait a year ago. 

Take a $700,00 home as of July 2024. The average mortgage rate is about 6.7% — this means, with a down payment of 15% the total price ($105,000), your monthly payment would be about $3,840. (This is excluding taxes and other fees for the sake of simplicity.) 

Over the life of the loan, that adds up to $1,382,185. 

Now let’s look at the same home in spring 2025: 

With the caveat that this is a huge simplification depending on where you’re located and other factors, calculating housing inflation based on the US Bureau of Labor Statistics’ data, that home in July 2025 could be expected to be about $720,000. 

So, you’re now paying $20,000 in extra principal, but maybe you’re saving overall by paying less interest via a reduced mortgage rate? Nope! The mortgage rate is pretty much the same — maybe a bit higher or lower depending on the day or week — but roughly 6.7% still. 

That means you’re now paying $3,000 extra on the down payment to keep it at 15% ($108,000) and also paying over $100 more per month at $3,950. Or, if you pay less on the down payment so it’s the same as you’d pay on that $700,000 home a year ago, you’re now paying $3,970 a month. This adds up to about $1,421,675 over the life of the loan. 

And this is all assuming the interest rates merely stay the same, and don’t actually increase during the time you’re waiting it out. An increase of .5% to 7.2% plus the increase in home value would lead to a monthly payment of $4,154 and a total of $1,495,500. 

If, say, hypothetically they fell — let’s say by .5% to 6.2%? You’d save about $90 per monthly payment but still pay more down, and end up paying $1,350,000 over the life of the loan. 

Critically to emphasize: These are all very conservative examples — especially for a housing market like the Pacific Northwest, where demand is super high and prices absolutely cannot be relied upon to stay close to where they are. 

While the example math we gave holds true nationally, a more local version could see a home price go up by well more than that $700,000 to $720,000 example — leading to you paying many hundreds more per month and hundreds of thousands more over the life of the loan. 

Consider the opportunity cost: Those extra hundreds per month could’ve funded a detached ADU, solar panels, an upgraded kitchen, and other things that make your house your home. 

So, what steps can you take? 

• Secure pre-approval for a custom home loan. Talk now with lenders who have experience with custom home building and educate yourself on construction-to-permanent loan options, how custom home mortgage terms vary from standard loans, etc. 

• Lock your rate. Related to the above, this is another really helpful financial step. Many lenders in the Pacific Northwest now offer rate lock programs — some up to a year. Many experienced builders (like Reality Homes!) can help you coordinate financing strategies too that minimize risk in an environment where rates are rising. 

• Partner with a local builder with extensive regional knowledge. Some builders are award-winning in Los Angeles but would be lost in Tacoma (even if they’d never admit it); working with a builder that has an in-depth grasp on the minutiae of your region will make your process much smoother, less expensive, and with a final product that thrives in your environment! An out-of-town builder simply doesn’t have the same ingrained knowledge — for example, septic vs. sewer, land use codes, environmental risks, weather-dependent timelines and appropriate considerations — that can lead to a slower, more expensive process, and a worse home in the end. 

• Start design and permit processes now, even if you’re not ready to break ground. Locking in material and labor quotes now helps avoid future markups. At the same time, in-demand locations like King County in Washington or Deschutes County in Oregon can take upwards of six months to get a permit — you want to give that lots of time. 

Bottom line 

Really, this all comes down to the fact that rates don’t live in a vacuum; while you’re waiting for a rate drop that might never come, other factors are driving up prices more. By taking action sooner instead of waiting, you better control your costs and subsequently have greater flexibility with all the details big and small — from location to countertops to energy systems — that make your home what you want it! 

And of course, if you’re in our neck of the woods and are looking for a builder to collaborate with, Reality Homes can help make that happen.