There are three distinct risks to custom home budgets: price increases pre-groundbreaking, post-move-in defects, and schedule overruns that in turn extend carrying costs. 

Per the National Association of Home Builders, homes built by a hired contractor for a specific landowner, the model Reality Homes and most custom home builders use, average about a year from authorization to completion. That compares to just seven-and-a-half months for spec homes, where a plat builder constructs on speculation before a buyer is lined up. 

That’s not the only wrinkle in the numbers, either. National averages you might see elsewhere often land closer to nine months from permit to move-in, but those figures mix in spec homes that are already sitting on a builder’s lot and can close much faster. The bigger variable for a custom build is the permitting process itself: in Pacific Northwest markets like King County, Washington or Deschutes County, Oregon, it can take six months or more just to get a permit issued before construction starts. With this in mind, builder guarantees such as price locks, build-time credits, and warranties act as contract mechanisms to offset these risks. 

Let’s look at what to consider and how prospective homeowners can benefit from these guarantees. First: 

Examples of how home building budgets go over 

Construction costs now account for 64.4% of a new home’s sales price, a record high, up from 60.8% just two years earlier, according to NAHB’s most recent Cost of Construction Survey. Over that same span, the finished lot’s share of the price actually fell, from 17.8% to 13.7%, as material and labor costs outpaced land costs. NAHB attributes the shift largely to broad inflation since 2022, particularly in building materials, the same pressure driving the lumber and tariff numbers below. 

Framing lumber tells much of that story. As of July 2026, prices are up 1.4% week-over-week, 4.7% compared to one month earlier, and just over 5% from a year ago. Tariffs are compounding the pressure: the combined Canadian softwood duty rate sits just below 36%, made up of a 10% Section 232 tariff plus a preliminary combined anti-dumping and countervailing rate of almost 26%, with final rates expected in August 2026. 

The typical final material cost for a new home runs nearly 15% over the builder’s direct cost once construction loan interest, broker fees, and underwriting margins are factored in. 

All in all, keeping costs down in this climate is a difficult business. 

How does interest rate risk compound the problem? 

As of July 9th, 2026, a 30-year fixed mortgage rate averaged around 6.5%, up by .07% the week earlier, and down from just over 6.7% a year ago according to Freddie Mac. 

For construction-to-permanent loans, interest is only charged on funds drawn during the build phase — this means a longer build directly extends the interest-only period before the loan converts to a standard mortgage. 

Many lenders in the Pacific Northwest now offer rate-lock programs — some up to a year — to help buyers manage this exposure while building. 

Now, let’s look at two of critical guarantees to combat these risks: 

What a price lock guarantee covers 

First, a definition: This is a contract clause fixing the price of the home and selected upgrades for a set window after signing, regardless of increases in materials or labor costs during said window. 

This is distinct from a mortgage rate lock — a price lock protects the construction contract price, while a rate lock protects the loan’s interest rate. While these cover different line items, both address budget risk. 

What a build-time guarantee covers 

While a price lock guarantee addresses cost, build-time guarantees address timeline. 

The build-time guarantee is a contractual credit paid to the homeowner when construction runs past an agreed-upon timeline. This is intended to offset the associated extended carrying costs such as rent, storage, or interim housing. 

Typically, build-time guarantees exclude delays that are attributable to the homeowner in this process — for example, late selections, change orders, and the like since those are outside the builder’s control. 

How Reality Homes structures build-time and price lock protections 

Reality Homes has a few mechanisms in place here: 

180/300-day price lock combination guarantee 

Here, you’ll find no price increase on the home or upgraded options if the lot is site-ready within 180 days of the signed contract date. If that window lapses before the lot is site-ready and a price increase occurs, the new price is extended for another 120 days. The one exception is lumber: material costs there aren’t locked under this guarantee, though Reality Homes hasn’t passed a lumber cost increase on to customers in the past four years. 

Build-time credit 

For every 30 days the build runs past the timeline listed in the partnership agreement, a $1,000 credit is provided up to a maximum of $3,000. Like for the price-lock, delays that are caused by the homeowner are excluded. The timeline also includes a three-week allowance for rescheduling of supplies and trade labor. 

Warranty backing 

Reality Homes comes with the Quality Builders Warranty program backed by Liberty Mutual; this includes one-year workmanship coverage, two-year electrical, plumbing, and HVAC systems coverage, and 10-year major structural coverage. If the build includes a detached garage, that gets a one-year workmanship-only coverage. 

Other financing considerations that interact with these guarantees 

These are some other notes to consider since they can impact your financing too. 

First, preferred lender programs offered through a builder. 

These can include rate locks, interest rate buy-downs, and paid closing costs, all distinct from the builder’s own price-lock guarantee on the home in question. 

Second is to consider the structure of construction loans — these disburse funds in phased “draws” that are tied to milestones during the building process such as land clearing, foundation laying, framing, etc. Often, these require inspection before each draw can be released. 

Looking at the builder incentive landscape in 2026 

Per an NAHB survey from early 2026, 64% of builders offered sales incentives and at least 60% of them have reported using incentives for more than a year. 

At the same time, 37% of builders cut list prices in 2026; with median new single-family home sizes holding at just over 2,000 square feet — effectively unchanged from 2024 — builders are leaning on smaller footprints to manage affordability. That shift matters for anyone weighing new construction against an existing home: since 2022, median new-home prices have fallen 5%, and in 2025 a typical existing home actually sold for about 1% more than a newly built one. With new-home inventory near a 9.7-month supply, builders have real incentive to negotiate on price and terms, which is leverage worth using when discussing price locks, build-time credits, and other protections with your own build. 

Know also the common rate-buydown structure that’s the 2-1 buydown: The rate is cut 2% in year one and 1% in year two, then settles at the full note rate in year three. Builders can also offer permanent buydowns, which lower the rate for the full loan term. 

Keep in mind, incentives are separate from a build-time credit or price lock guarantee; they’re sales tools tied to closing a purchase, while price locks and build-time credits are contractual protections bound to the build agreement itself. 

A snapshot of Reality Homes 

If you want to build a new home in Washington, Oregon, or Idaho, Reality Homes is a family-owned custom home builder that’s been operating in the Pacific Northwest for 25 years. 

Not only do we offer over 65 customizable floor plans, but our homes range from the Value Series, making home ownership more affordable for every budget, all the way to larger two-story plans up to almost 3,900 square feet. 

Furthering your peace of mind, Reality Homes’ Stress-Less Partnership Program bundles a 180/300-day price lock, build-time credit, and the Quality Builders Warranty into a single agreement. 

Wherever you’re planning on building your home, be sure to educate yourself on these guarantees, warranties, and rebates and how they target different budget risks — price locks, build-time credits, and structural warranties mitigate risk of material and labor cost increases, schedule overruns, and post-move-in defects. 
 
And remember, before signing a build agreement, confirm in writing details such as the price-lock window and any extension terms, the build-time credit formula and its exclusions, and the warranty term and underwriter. 

If you are in the Pacific Northwest and want to learn more, please schedule a call with one of Reality Home’s advisors to review the Stress-Less Partnership Program — we’d love to help you on your journey!