Kempf Construction LLC is a licensed general contractor Corvallis OR homeowners, business owners, and property investors can trust, backed by more than 20 years of building experience throughout the Willamette Valley. From custom homes on the west side near the foothills to kitchen remodels in established neighborhoods around Oregon State University, ADUs throughout town, and commercial build-outs along the 9th Street, Philomath Boulevard, and Highway 99W corridors, we manage residential and commercial construction from the first sketch to the final walkthrough. Our team is CCB-licensed, bonded, and insured under CCB #260337, giving clients confidence that every project is handled with professionalism, accountability, and care. We understand Corvallis permitting requirements, valley soil conditions, local building needs, and the character of the city’s neighborhoods, allowing us to plan each project with clear communication, dependable craftsmanship, and construction solutions built to last.
Why Choose Us
- Licensed, bonded & insured - Oregon CCB #260337
- Fixed-bid pricing so you know your costs before we break ground
- In-house project management - one point of contact from permit to punch list
- Local crews who understand Corvallis building codes, Benton County permitting, and hillside and valley-floor lots
Years in Business
Projects completed
On-time delivery
Our Services
General Contracting
As your general contractor, Kempf Construction LLC manages every moving part of your build. We design coordination, permitting with the City of Corvallis and Benton County, scheduling, licensed subcontractors, materials, inspections, and final delivery. Whether you're expanding a home, opening a storefront, or building from the ground up, we keep your project organized, code-compliant, and on schedule.
Residential Construction
We build homes for the way Corvallis lives. Our residential construction services cover new single-family homes, full structural framing, and ground-up builds on infill lots, hillside parcels, and acreage throughout the area. From energy-efficient designs suited to the Willamette Valley climate to layouts that take advantage of Corvallis's foothill views and established neighborhoods, we build durable, beautiful homes designed to last.
Commercial Construction
Corvallis business owners and developers rely on us for tenant improvements, retail and office build outs, and ground up commercial construction. We coordinate with architects, engineers, and the city to deliver code compliant commercial spaces, including restaurants, professional offices, medical facilities, retail, and mixed use projects, with minimal disruption to your operations and a clear, predictable timeline.
Remodeling
Whether you own an established home near campus or a newer build on the south side, our remodeling services bring new life to existing spaces. We handle whole home renovations, room by room updates, and structural remodels that improve function, comfort, and resale value while respecting your home’s character.
Home Additions
Need more space without leaving Corvallis? Our home addition services add square footage where you need it most, including primary suite additions, second stories, expanded living rooms, sunrooms, and bump outs. We tie new construction seamlessly into your existing structure so the addition looks and feels original to the home.
ADU Construction
Accessory dwelling units are one of the smartest ways to add value, rental income, or multigenerational living space in Corvallis. With Oregon State University driving steady housing demand, ADUs are especially valuable here. As an experienced ADU builder, we design and construct detached and attached units, garage conversions, and shop conversions that meet all Oregon and City of Corvallis requirements. Popular near campus for rental income and on larger hillside or acreage lots, each ADU is built for lasting comfort, flexibility, and compliance.
Our Construction Process
Free Consultation
We meet with you to review your goals, site conditions, and budget. This first step ensures we understand your vision and can provide accurate guidance from the start.
Fixed‑Bid Estimate
You receive a clear, written scope of work and a fixed price. No surprises, just transparent numbers and a defined plan.
Design & Permitting
Our team finalizes plans and secures all required City of Albany and Linn County permits. We handle the paperwork so your project moves forward smoothly and on schedule.
Construction
Skilled crews build according to plan, maintaining a clean job site and providing regular progress updates. We coordinate trades and inspections to keep everything efficient and organized.
Inspections
Every phase passes required code inspections to ensure safety, compliance, and long‑term durability.
Final Walkthrough
We don’t finish until you’re satisfied. Together, we review every detail to confirm the work meets your expectations and our quality standards.
Local Spotlight: Building & Expanding Homes Across Corvallis
Frequently Answered Questions
How much does it cost to build a custom home in Corvallis, Oregon?
Building a custom home in Corvallis typically costs between $260 and $420+ per square foot, depending on design, finishes, site conditions, and lot prep; hillside and view lots on the west side often run higher due to foundation and access work. A fixed-bid estimate from Kempf Construction gives you an exact price before construction begins.
Do I need a permit to build an ADU in Corvallis?
Yes. ADUs in Corvallis require permits through the City of Corvallis and must comply with Oregon’s statewide ADU rules covering size, setbacks, and parking. As a licensed contractor, we handle the entire permitting process for you.
Can you build a view home on a west-side or foothill lot?
Yes. We build ground-up custom and view homes on hillside and sloped lots throughout the Corvallis west side and Coast Range foothills, handling the site evaluation, foundation engineering, access, and Benton County permitting that hillside builds require, and managing construction start to finish.
What's the difference between a general contractor and a home builder?
A general contractor manages and coordinates all aspects of a construction project — permits, subcontractors, scheduling, and inspections — for remodels, additions, and new builds alike, while “home builder” usually refers specifically to new-home construction. Kempf Construction does both.
Are ADUs a good investment near Oregon State University?
Absolutely. With OSU driving steady rental demand, a well-built ADU near campus can generate strong rental income while adding long-term value to your property. We handle design, permitting, and construction start to finish.
