Additions & Expansions
Seamless Additions, Built to Last
More room, less stress. Seamless, code-compliant builds that feel original to your home.
Home additions (ADU) aren’t about moving, they’re about improving. When you’ve outgrown your house, you don’t have to move, you can improve. We deliver additions and expansions that match your home’s structure, style, and budget. From feasibility and permits to framing, finishes, and final inspection, our team manages every detail with clear communication and clean execution.
We coordinate with designers and architects, expertly handle all necessary City of Eugene and Lane County permitting requirements, and meticulously maintain a safe and tidy jobsite throughout the entire construction process. The end result is not just added square footage; it is also a significant enhancement to your living space without the added headaches typically associated with such projects, delivered on time, within budget, and with the highest quality standards in mind.
Every addition begins with a clear plan and a realistic budget that accounts for all potential variables. We conduct a thorough evaluation of the structure, utilities, and site access, then meticulously sequence the work to minimize disruption to your daily routine and lifestyle. Our dedicated team coordinates engineering efforts, inspections, and material lead times with precision, ensuring you’re never left guessing about what comes next in the process. You can expect to receive weekly updates that keep you informed, along with clean job sites that prioritize safety and organization, as well as strict punch-list discipline to ensure nothing is overlooked.
What We Can Build for You:
- Living or Dining Bump-Outs
- Primary Suite Additions
- Second-Story Additions & Dormers
- Garage Conversions
- Attached or Detached ADUs
- Sunrooms & Four-Season Rooms
- Covered Porches & Outdoor Rooms
- Over-Garage Bonus Rooms
- Mudroom & Laundry Additions
- Basement Finishes with Egress
- Window Walls & Skylights
- Accessibility Upgrades
Choosing KEMPF Means Peace of Mind
Transparent Scopes
Clear proposals and no hidden costs.
On-Time, On-Budget
Realistic timelines with proactive updates.
Proven Craftsmanship
Skilled crews, vetted trades, strong site safety.
Professional and Qualified
Details that look original to your home.
Oregon CCB #260337—inspection-ready work.
Our Design and Build Process
Discovery & Site Visit
goals, budget range, and how you use the space
Feasibility & Zoning
setbacks, lot coverage, utilities, structural needs
Design Development
plans, selections, value-engineering where it counts
Fixed Scope & Proposal
transparent pricing and a clear schedule
Permits & Pre-Construction
submittals, ordering, mobilization
Build & Quality Checkpoints
(OSHA) compliant ,clean jobsite, milestone walk-throughs, updates
Final Walk-Through & Warranty
punch-list complete and ongoing support
Frequently Answered Questions
How long will an addition take?
Small bump-outs might run 6–10 weeks after permits; larger or second-story additions can take several months. You’ll get a project-specific schedule before we start your home additions
Can we live in the home during construction?
Often, yes. We use dust control, safe pathways, and daily cleanup. For heavier phases, we’ll plan short-term adjustments together.
Will the new space match the original home?
That’s our standard. We source compatible siding, roofing, trim, and interior finishes so the home additions feels integrated.
Other Services
