These Portland-based construction companies include general contractors, specialists in mechanical and electrical systems, and firms focused on residential and commercial projects. Fortis Construction, Inc. provides general contracting services with expertise in sustainability. Harder Mechanical Contractors, Inc. offers mechanical contracting across western states, while EC Electric designs and installs electrical networks for diverse sectors. Walsh Construction Co. specializes in multi-family and affordable housing.
A notable pattern among these companies is their long-standing presence in the industry. Many were founded in the mid-20th century, such as Harder Mechanical Contractors, Inc. (1934), EC Electric (1946), and Andersen Construction (1950), indicating a mature and established construction sector in Portland.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Fortis Construction, Inc.fortisconstruction.com
Employee-owned general contractor delivering high-quality construction projects with specialized services in estimating, value analysis, construction management, and sustainability expertise across various markets |
808 | |||
| 2 |
Harder Mechanical Contractors, Inc.harder.com
A nationally recognized contractor providing safe, quality, and on-budget projects in the western states, focused on continuous improvement and growth |
693 | |||
| 3 |
EC Electricecpowerslife.com
Designing and installing electrical networks since 1946, providing comprehensive power solutions for diverse sectors like airports, factories, and data centers. |
627 | |||
| 4 |
Walsh Construction Co.walshconstruction.com
Pacific Northwest general contractor specializing in multi-family, affordable housing, mixed-use, healthcare, and education projects, with a focus on sustainability and community involvement |
614 | |||
| 5 |
Andersen Constructionandersen-const.com
Established in 1950, the company focuses on building technically challenging commercial, residential, and industrial projects throughout the Pacific Northwest with a highly collaborative approach |
516 | |||
| 6 |
OEG, Inc.oeg.us.com
An electrical construction, systems, and manufacturing company with strong financial backing, local roots, national presence, and community involvement since 1947 |
464 | |||
| 7 |
Howard S. Wright, a Balfour Beatty companyhswc.com
Passionate about building quality projects, fostering lasting relationships, and exceeding client and partner expectations through teamwork, resilience, understanding, service, and training. |
308 | |||
| 8 |
Kirby Building Systems, A Nucor Companykirbybuildingsystems.com
A manufacturer of custom-engineered metal building systems, Kirby Building Systems provides high quality and cost-effective solutions for various applications |
267 | |||
| 9 |
Neil Kelly Companyneilkelly.com
A nationally recognized design/build remodeling company delivering award-winning projects, energy efficiency solutions, home improvement, and handyman services with a commitment to sustainability |
185 | |||
| 10 |
Charter Mechanical Contractors, Incchartermechanical.com
A leading provider of mechanical and process piping services in the Northwest, offering exceptional results and customer satisfaction on projects of all sizes |
166 | |||
| 11 |
NessCampbell Crane + Riggingnesscampbell.com
A crane and rigging company in the Pacific Northwest providing fast, efficient, and competitive crane services with a focus on quality, safety, and professionalism |
153 | |||
| 12 |
Home Improvement Services Inchome-improve-inc.com
A construction company specializing in home improvement services, located in Mount Prospect, IL, United States |
153 | |||
| 13 |
Pence Contractorspence.net
Commercial general contractor serving Portland, Salem, and Bend, Oregon, specializing in construction projects across various industries |
150 | |||
| 14 |
TCM Corp. (Acquired by Southland Industries)southlandind.com
A company completed a merger with Southland Industries, now continuing partnership under the Southland name Stay updated on latest news |
148 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 15 |
Carpentry Plus, Inc.carpentryplusinc.com
A collaborative team in the construction industry leveraging relationships to deliver predictable results, cost-effectiveness, and safe projects for clients |
148 | |||
| 16 |
Portland Glassportlandglass.com
Leader in glass services in Northern New England for commercial, residential, and auto customers Specializing in repair, replacement, and installation with a focus on professionalism and quality |
146 | |||
| 17 |
RDF BUILDERS COrdfbuilders.com
Innovative Northwest building company with a focus on functionality and community impact, striving to create better buildings and partnerships |
35 | |||
| 18 |
Hay Runnerhayrunner.com
This company specializes in architecture, design, general contracting, small jobs, and real estate to simplify the home ownership lifecycle and create beloved spaces |
17 | |||
| 19 |
WILLCOwillcopdx.com
A comprehensive home maintenance company in Portland, offering custom remodeling, handyman services, and professional painting for residential, commercial, and multi-family projects |
15 | |||
| 20 |
MHA Resource Companymharesources.com
A privately-held company with subsidiaries specializing in construction and equipment supply |
12 | |||
| 21 |
Hamish Murray Construction, Inc.hamishmurray.com
A luxury home builder and remodeler in Portland, OR, specializing in new construction, remodels, and additions while prioritizing client vision and lasting relationships |
10 | |||
| 22 |
Roloff Construction Incroloffconstruction.com
An award-winning design + build firm in Portland Metro area, specializing in home renovations Dedicated to helping clients fulfill their remodel visions |
10 | |||
| 23 |
JDL Development Inc. | Builders & Remodelersjdl.build
A leading home builder and remodeler based in Portland, OR, serving clients since 1976 with top-quality construction and renovation services |
10 | |||
| 24 |
B&G Buildersbngbuilders.com
A sustainable construction company founded by experienced professionals, specializing in commercial, residential, and infrastructure projects with a focus on community-based and nonprofit work |
8 | |||
| 25 |
City Home Improvement, Inc.cityhomeimprovementinc.com
A family-owned remodeling business in Portland and Vancouver since 1956, specializing in kitchens, bathrooms, and home additions with a focus on quality and customer satisfaction |
8 | |||
| 26 |
Let's Remodelletsremodel.net
A husband and wife team providing custom home remodeling services in Portland with a focus on honest work, client-centered design, and open communication |
7 | |||
| 27 |
Lo's Contracting, Inc.loscontracting.com
A home improvement contractor in Portland and Vancouver specializing in remodeling, new construction, additions, and painting with a client-centered approach |
6 | |||
| 28 |
PINNACLE STAINLES LLCpinnacle-stainless.com
Custom stainless steel fabrication company providing engineered products and services for industries such as breweries, kitchens, semiconductors, and cannabis processing equipment |
4 | |||
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
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The same list elsewhere in United States
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