Second-Story Additions in Portland, OR
Double your living space without giving up your yard.
On tight Portland-metro lots, going up is often the best option. A second floor addition doubles your living space while leaving the garden, patio, and driveway exactly where they are.
Choosing to add a second story means structural engineering, a foundation evaluation, a new staircase, and a new roof — we coordinate all of it, sequence the roof removal to keep the house dry, and match siding, windows, and trim across both levels.
Scope of Work
What’s Included
Full second stories
A complete new floor engineered onto the existing footprint.
Partial & over-garage additions
Targeted second-floor space where the structure allows.
Structural engineering
Load paths, footings, and foundation reinforcement designed and stamped.
New staircase
Stair run planned into the existing floor plan without losing rooms.
Roof removal & rebuild
Sequenced and protected so the home stays dry through the transition.
Permits
Full structural submittal and jurisdictional coordination.
How It Works
Our Process
- 1
Consultation & site walk
We walk the home with you, measure the existing structure, and talk through goals, budget range, and timing before anything is drawn.
- 2
Design & engineering
Our in-house studio produces plans and 3D views, and our structural team engineers the framing, foundations, and systems behind them.
- 3
Permits & pricing
We prepare and submit the permit package, answer plan-review comments, and lock a detailed, line-item price against the approved set.
- 4
Build & walkthrough
One Masters project lead runs the trades, schedules inspections, and finishes with a punch walkthrough before handing the space back.
Where We Build
Areas We Serve
See every neighborhood we build in on our Portland Metro service areas map.
Frequently Asked
Second-Story Addition FAQs
What Portland and Vancouver homeowners ask before they begin.
Second-story additions sit at the upper end of the $400–$700 per square foot addition range because of foundation reinforcement, new stairs, and temporary roof protection. See our Portland remodeling cost guide for detailed ranges.
Start Your Second-Story Addition
Tell us about the home and we’ll walk the site, talk through scope, and give you a realistic range — no obligation.
CCB #248237 · Licensed in Oregon & Washington