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The Custom Home Building Process in Oregon: A Complete Overview
Most custom home clients know the rough shape of the process — design, permits, build, done. What most don’t know is what happens in the spaces between meetings: the permit review rounds, the subcontractor scheduling, the inspection sequencing, and the dozens of coordination tasks that determine whether a build finishes on time and on budget or doesn’t.
PHASE
1
Pre-Construction Planning
Pre-construction is where most custom home projects succeed or fail — quietly, months before ground is broken. This phase covers scope definition, design development, engineering review, permit application, and budget refinement. In Oregon, it also includes geotechnical evaluation, wetland delineation for Willamette Valley sites, and WUI compliance review for Bend-area lots.
PHASE
2
Lot Selection and Site Preparation
Oregon lot selection involves regulatory layers that don’t exist in most other states — Urban Growth Boundary designations, Exclusive Farm Use zoning, and county-specific setback limits. Selecting a lot without understanding site preparation costs can add $30,000–$100,000+ to a budget that wasn’t sized for them.
PHASE
3
Permitting
Oregon’s permit process runs through your local Building Department, but the state’s Building Codes Division (BCD) sets the Oregon Residential Specialty Code (ORSC) that all jurisdictions enforce. In Salem, plan review typically runs 10–20 business days per round. In Bend, full plan review takes 8–14 weeks.
PHASE
4
Site Work and Foundation
Construction begins with clearing, grading, and excavation. In the Willamette Valley, the wet season (October–April) imposes real constraints on grading and foundation work. Foundation work — excavation, forming, reinforcement, pour, waterproofing, and backfill — takes 3–6 weeks.
PHASE
5
Framing
Wall framing, floor systems, roof structure, sheathing, and housewrap, typically 4–8 weeks. Oregon’s seismic zone designations affect framing requirements. Framing inspection by the Building Department must be completed before insulation or drywall.
PHASE
6
Mechanical Rough-In
Plumbing, HVAC, and electrical run through the framed structure before walls are closed. Each trade inspects separately in Oregon.
PHASE
7
Insulation and Weatherization
Oregon’s energy code requires a blower door test on new construction to verify air leakage rates — this is measured, not estimated. Moisture management failures in the wall assembly are the most expensive defects to remediate after move-in.
PHASE
8
Interior Finish and Final Inspections
Drywall, painting, flooring, cabinets, fixtures, and finish trim. Final inspections produce the Certificate of Occupancy. A final walkthrough with your contractor produces the punch list before handoff.
The Timeline in Practice
A custom home build in Salem or Bend runs 12–20 months from initial planning through move-in.
One Contractor, Every Phase
Integra Built handles in-house design, drawings, and permitting alongside construction — one point of contact from the first site conversation through the final walkthrough. We’ve built custom homes in the Willamette Valley and Central Oregon since 2010. Oregon CCB #234-156.