
Home Additions & ADUs
Room additions, master suites, garage conversions, ADUs, and basement or attic finishes
A premium take on home additions & adus
More space is the most valuable thing you can add to a Portland-area home, and there are more ways to get it than moving. SCP Construction builds room additions, master suite additions, and detached ADUs from the foundation up, and converts the space you already own: garages, basements, and attics. We handle zoning questions, permits, and inspections, then build with the same crew from framing through paint so the new space feels like it was always part of the house.
This service is a good fit for homeowners and property managers who want a clean, professional result without juggling the details themselves. We handle the prep, the finish work, and the cleanup so the space is ready to enjoy when we're done.
Every project covers the essentials
- Room additions and master suite additions
- Detached and attached ADU construction
- Garage conversions, basement and attic finishes
- Zoning, permits, and inspections handled for you
- Foundation, framing, roofing, and finishes by one crew
- Written workmanship warranty on the finished space
Four steps from first call to final walkthrough
Feasibility Visit
We look at the lot, the structure, and the setbacks, and tell you plainly what the city or county will and won't allow.
Plans & Written Scope
Drawings, an itemized estimate, and a schedule that includes permit review time, not just build time.
The Build
Foundation, framing, roofing, rough-in, insulation, drywall, and finishes with inspections scheduled at each stage.
Final Inspection & Walkthrough
Final sign-off from the inspector, then a room-by-room walkthrough with you.
The difference a careful job makes
Small choices in prep, materials, and finish work add up to a result that looks better and lasts longer.
Polished Finish
A clean, professional result that elevates the look and feel of the space.
Built to Last
Careful preparation and quality materials help the result hold up over time.
Detail-Driven
We sweat the edges, transitions, and finish work that cheaper jobs skip.
Respect for Time
Clear timelines and steady communication from first contact to walkthrough.
Detail-driven from start to finish
Premium results come from disciplined habits — not shortcuts. Here's the standard we hold ourselves to on every project.
Clear Communication
Straightforward answers, transparent scope, no surprises.
Careful Preparation
Surfaces, materials, and the site are prepped before any real work begins.
Professional Materials
We work with materials chosen for the finish and longevity they deliver.
Respect for Property
Floors, fixtures, and surroundings are protected throughout the project.
Final Quality Check
Every job ends with a walkthrough so the result matches expectations.
Questions, answered
Related services

Home Remodeling & General Contracting
Whole-home, interior, and exterior remodels run by one accountable general contractor
View Home Remodeling & General Contracting details
Kitchen Remodeling
Full kitchen remodels, custom cabinets, and countertops planned around how you actually cook
View Kitchen Remodeling details
Bathroom Remodeling
Walk-in showers, tub-to-shower conversions, vanities, and full bathroom renovations
View Bathroom Remodeling detailsGet a free estimate for home additions & adus
Share a few details about your project and we'll get back to you with clear next steps.
