Kempf Construction LLC is a licensed general contractor Cottage Grove OR homeowners, business owners, and property investors can trust, backed by more than 20 years of building experience across Lane County and the Willamette Valley. From custom homes on wooded acreage near Dorena Lake to kitchen remodels in established neighborhoods near historic downtown Cottage Grove, additions and ADUs throughout the area, and commercial build-outs along Main Street and the Highway 99 corridor, 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 Cottage Grove’s permitting process, local soil conditions, rural and in-town building needs, and neighborhood character, 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 Cottage Grove building codes, wooded acreage lots, and south-Lane permitting
Years in Business
Projects completed
On-time delivery
Our Services
General Contracting
As your general contractor, Kempf Construction LLC manages every part of your build, including design coordination, permitting with the City of Cottage Grove, scheduling, licensed subcontractors, materials, inspections, and final delivery. Whether you’re expanding a home, opening a storefront, or starting a new build, we keep your project organized, code compliant, and on schedule.
Residential Construction
We build homes for the way Cottage Grove lives. Our residential construction services cover new single-family homes, full structural framing, and ground-up builds on infill lots and wooded acreage throughout the area. From energy-efficient designs suited to the Willamette Valley climate to layouts that take advantage of Cottage Grove's forested setting and growing subdivisions, we build durable, beautiful homes designed to last.
Commercial Construction
Cottage Grove 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, retail, and mixed use projects, with minimal disruption to your operations and a clear, predictable timeline.
Remodeling
Whether you own a home on acreage near Dorena Lake or a classic house in Cottage Grove’s historic downtown, 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 moving? 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 Cottage Grove. As an experienced ADU builder, we handle detached and attached units, garage conversions, and shop or barn conversions, all fully permitted under Oregon and City of Cottage Grove ADU rules. ADUs are especially practical on Cottage Grove’s larger wooded and rural residential lots, offering flexibility and long-term value for homeowners.
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 Cottage Grove
Frequently Answered Questions
How much does it cost to build a custom home in Cottage Grove, Oregon?
Building a custom home in Cottage Grove typically costs between $250 and $400+ per square foot, depending on design, finishes, site conditions, and lot prep. 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 Cottage Grove?
Yes. ADUs in Cottage Grove require permits through the City of Cottage Grove 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 I build a home on wooded acreage near Dorena Lake?
Yes. We build ground-up custom homes on wooded and rural-residential acreage throughout the Cottage Grove area, including lots along Row River Road and toward Dorena and Lorane. We evaluate your site, handle Lane County and city permitting, and manage 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.
Do you build shops, barns, or ADUs on larger Cottage Grove lots?
Absolutely. Cottage Grove’s larger wooded and rural lots are ideal for detached ADUs, shops, and barn or garage conversions. We handle design, permitting, and construction for all of them.
