Business Details
50+ Years
experience
Trusted Structural and Civil Engineering Solutions in Appleton, WI
Harris & Associates was founded in 1957 by Theodore J. Harris, establishing a legacy of engineering excellence rooted in personalized client service. Our team of licensed civil engineers, structural engineers, and land surveyors delivers tailored solutions for commercial, residential, and industrial projects ranging from small additions to large-scale developments. With principals actively involved in every project phase, we maintain direct client engagement while addressing structural design, site planning, and surveying needs.Our expertise spans building foundations, stormwater management, erosion control, and ALTA/NSPS surveys, supported by decades of combined experience across Wisconsin and neighboring states. Eighty percent of our work comes from repeat clients, reflecting our commitment to quality, technical precision, and adherence to evolving industry standards in environmental stewardship and public safety.
Services
Structural Engineering
Civil Engineering
Land Surveying
Architectural Services
Details
- Year established: 1957
Highlights and features
- We offer 65+ years of combined engineering experience across Wisconsin and Midwest states.
- Our principals maintain direct involvement in all project phases for quality control.
- We provide comprehensive services spanning structural design, land surveying, and civil engineering.
- Our team holds professional licenses in six states for multi-jurisdictional project capabilities.
- We maintain 80% repeat client retention through consistent technical and service excellence.
Services
Structural Engineering
We provide structural engineering for commercial, residential, and agricultural projects including building foundations, equipment platforms, and recreational bridges. Our engineers address fire damage, snow load issues, and rehabilitation studies while ensuring code compliance. Services extend to project management and detailed shop drawings for construction accuracy.
Civil Engineering
Our civil engineering services cover site planning, stormwater management, and erosion control for commercial and multi-family residential developments. We handle permitting processes, sewer/water main extensions, and construction management to meet municipal requirements while maintaining environmental standards throughout Wisconsin and Midwest regions.
Land Surveying
Professional land surveying services include ALTA/NSPS surveys, topographic mapping, and floodplain analysis for residential, commercial, and industrial properties. We provide legal descriptions, construction staking, and subdivision plats with expertise in Wisconsin land planning regulations and approval processes.
Architectural Services
Architectural design services focus on commercial, retail, and multi-family residential structures. We offer floor plan layouts, building code reviews, and construction progress inspections to ensure compliance with safety standards while addressing client-specific functional requirements across various occupancy types.
People
Robert D. Tollefson
President
Licensed Professional Engineer with 35+ years of structural/civil engineering experience. Specializes in commercial building design, equipment foundations, and stormwater management. Holds licenses in six states and graduated from Michigan Tech in 1983.
Robert J. Harris
Professional Land Surveyor
Over 40 years of Wisconsin land surveying experience. Past president of Wisconsin Society of Land Surveyors. Expertise in legal descriptions and municipal permitting. Graduated from UW-Fox Valley and Stevens Point, licensed since 1988.
Calvin L. Tollefson
Professional Engineer
35-year civil engineering veteran specializing in stormwater management and erosion control. Licensed in Michigan and Wisconsin since 1990. Focuses on municipal permitting processes and drainage solutions for commercial developments.
Keith Walenski
Professional Land Surveyor
31-year land surveying professional with 29 years at Harris & Associates. Licensed in Wisconsin since 1995. Member of Wisconsin Society of Land Surveyors. Expertise in construction staking and boundary surveys.
Questions
What engineering services does Harris & Associates offer?
We provide structural engineering, civil engineering, land surveying, and architectural services for commercial, residential, and industrial projects across the Midwest.
How long has Harris & Associates been in business?
Harris & Associates has provided engineering services since 1957, maintaining continuous operation for over 65 years in Appleton, Wisconsin.
Which states do you provide services in?
Our licensed professionals serve projects in Wisconsin, Michigan, North Dakota, Indiana, North Carolina, and South Carolina.
What types of clients do you work with?
We serve commercial retailers, developers, municipalities, homeowners, and engineering firms with 80% of our work coming from repeat clients.
Can you handle both small and large projects?
Yes, we manage projects ranging from single-room additions to 200,000 sq ft retail facilities while maintaining personalized client attention.
How do you ensure project quality and compliance?
Our principals directly oversee all projects, combining technical expertise with regulatory knowledge to meet safety standards and client specifications.
Reviews (2)
Craig Konrad
May 21, 2020
Report
Rob was great to work with and they were able to survey our property the same day that we called. Crew that arrived on site was professional and friendly.
Aquire Restoration Inc
Dec 21, 2018
Report
Bob was amazing to work with, even on short notice, to produce an expedited engineering report on one of our projects!
