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Guide to Construction Loans and Financing for a Custom Home Build

Integra Built · Serving Willamette Valley and Central Oregon · CCB #234-156

Building a custom home is one of the most significant financial decisions you’ll make. And yet most people walk into the financing side of it completely unprepared, forgetting that a construction loan works nothing like a mortgage.

When you buy an existing home, the lender funds something tangible. When you build, you’re asking a lender to fund a project that doesn’t have walls yet. That changes how money moves, how risk is assessed, and what you need to have ready before the first dollar is released.

This guide walks you through how construction financing works in Oregon, what lenders actually require, and what you should have sorted out before you sit down with a lender. 

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Choosing Your Loan Structure

There are three common ways to finance a custom home build. Understanding the difference up front means you get to choose the structure that fits your situation.

Construction-to-Permanent (One-Time Close)


This loan funds the build and converts automatically to a permanent mortgage when construction is complete. Your interest rate locks before you break ground, which offers predictability. The one drawback is that you won’t benefit from lower repayments if rates fall during a 12–18 month build.

Stand-Alone Construction Loan (Two-Close)


With the stand-alone loan, you get two separate closings. The first one is for the actual build, while the second one is for a permanent mortgage once the home is complete. Two closings and two sets of fees. The upside is rate flexibility. You lock your permanent mortgage rate at the end of the construction, when the market may be more favorable. The tradeoff is that these loans are often more administratively demanding and have higher total closing costs.

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Feature One-Time Close Two-Close
Closings 1 2
Rate lock timing Before construction starts At the mortgage closing
Closing cost exposure Lower Higher
Rate flexibility None during build Full at conversion
Complexity Lower Higher

What It Takes to Qualify

To determine whether you qualify for a construction loan, lenders will evaluate your financial profile and the project’s completeness.

The financial profile assesses your ability to repay the loan, and they will look into factors like:

Income documentation: Self-employed borrowers will face more documentation requirements than W-2 employees. Expect to provide two years of tax returns, any K-1s, and a personal financial statement. Most lenders want to see stable, provable income, not just current income.

Credit score: Conventional construction loans generally require a score of 680 or higher. FHA allows a minimum down payment of 580. If your score is lower, it’s worth taking time to improve it before applying. The difference in rates between a 680 score and a 740 over an 18-month build adds up.

Project documentation is where construction loans differ most from a standard mortgage. Before a lender can approve your loan, you’ll need:

  • Detailed architectural plans and specifications.
  • A signed contract with a licensed, CCB-registered builder.
  • A complete construction budget, including hard costs and soft costs.
  • A draw schedule aligned with the build milestones.
  • An as-completed appraisal based on the projected value of the finished home.

The as-completed appraisal is particularly important as it will impact the loan amount. If the appraiser’s projected value comes in below your total build cost, the loan amount shrinks to match, meaning you will have to cover the gap in cash or reduce the scope.

Lenders don’t just evaluate you. They also evaluate your builder. Oregon CCB licensing confirms a contractor carries general liability insurance and is bonded. An unlicensed contractor is a completion risk most lenders won’t accept. 

Expect the lender to request the builder’s active CCB license number and to review the builder’s public permit history. Integra Built’s CCB #234-156 and permit record are exactly the kind of documentation lenders ask for at this stage.

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Draw 1
Site prep, excavation, and foundation complete.
Draw 2
Framing and roof complete (structure weather-tight)
Draw 3
Rough plumbing, electrical, and HVAC.
Draw 4
Insulation, drywall, and exterior are complete.
Draw 5
Interior finish and fixtures are installed.
Draw 6
Final inspections and certificate of occupancy issued

Building a Budget That Holds

Your loan amount defines the ceiling on what you can spend. Getting that number right before closing is the difference between a project that finishes on plan and one that runs short mid-phase.

Two categories of costs need to be in your budget from the start. Hard costs are materials, labor, and site work. They cover everything that becomes part of the structure. Soft costs are everything else, like architectural and engineering fees, permits, lender fees, title insurance, and inspections. You will need to account for both before the application.

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From Application to Move-In

The lender conversation goes much better when you arrive prepared. The items below are what lenders need to evaluate both your application and your project:

On the project

On the builder

On the lot

On your finances

Avoiding the Mistakes That Derail Builds

Most construction financing problems are predictable. Here are the ones that come up most often in Oregon custom builds, along with the habits that prevent them.

  • Draw documentation gaps: Missing lien waivers or milestone photos reset the draw clock and delay the next phase. Stay involved in each draw package before it goes to the lender.
  • Unapproved scope changes: Change orders beyond the approved loan amount require lender review, updated documentation, and sometimes a new appraisal. Ensure every scope change is reviewed against the loan before work starts.
  • Contingency consumed early: Once the reserve is gone, additional funds require lender re-approval. Remember to budget for Oregon-specific site risks from the start, not as an afterthought.
  • Rural utility costs missed: Well, septic, and electrical lateral work must be in the original loan approval. Found mid-build, they require a loan modification and create delays.
  • Timeline overruns. If construction exceeds the loan term, expect extension fees and possible rate adjustments. Build your schedule around realistic jurisdiction timelines, not best-case ones.
  • WUI surprises. On designated WUI lots in Central Oregon, unaccounted R327 requirements can trigger plan revisions mid-permit review, delaying your start and compressing your draw timeline.

  • Get pre-qualified before finalizing plans. Your loan amount shapes your design decisions, not the other way around.
  • Choose a builder with documented experience coordinating lender draw schedules and third-party inspections.
  • Stay actively involved in each draw package. Don’t leave it entirely to the contractor.
  • Document every scope change, approval, and lender communication in writing.
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