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Home Additions & ADUs
Professional Service

Home Additions & ADUs

Room additions, master suites, garage conversions, ADUs, and basement or attic finishes

(503) 754-0035
Free Estimates
Local Service
Quality Workmanship
Overview

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.

What's Included

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
Our Process

Four steps from first call to final walkthrough

01

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.

02

Plans & Written Scope

Drawings, an itemized estimate, and a schedule that includes permit review time, not just build time.

03

The Build

Foundation, framing, roofing, rough-in, insulation, drywall, and finishes with inspections scheduled at each stage.

04

Final Inspection & Walkthrough

Final sign-off from the inspector, then a room-by-room walkthrough with you.

Why It Matters

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.

Our Standard

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.

FAQ

Questions, answered

Timelines depend on the size and scope of the project. After a quick conversation about your space, we'll share a realistic estimate before any work starts.

Yes — every project starts with a free, no-pressure estimate so you know exactly what's included before deciding to move forward.

Careful prep is part of the work. We protect surrounding surfaces, prepare the work area, and stage materials so the project runs cleanly start to finish.

Absolutely. We're happy to walk through options that fit the look you want and the way the space is actually used day-to-day.

Yes. Cleanup and a final walkthrough are part of every job — the space should feel finished, not unfinished.

We serve the Portland metro and the northern Willamette Valley, including Oregon City, West Linn, Lake Oswego, Milwaukie, Happy Valley, Gresham, Portland, Beaverton, Hillsboro, Tigard, Tualatin, Sherwood, Vancouver, and Salem. Not sure about your address? Just ask when you request your estimate.
Ready When You Are

Get 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.

(503) 754-0035
Free Estimates
Local Service
Quality Workmanship