O'Connor Company was founded in 1970 by Irish and Mary OConnor under two basic principles, comfort and service. For nearly half a century O'Connor Company has been rising to the challenge and meeting the demand for commercial HVAC equipment. Whether working with building owners, mechanical contractors or consulting engineers, we are here to provide continued expertise coupled with quality parts and equipment. O'Connor Company covers a wide territory throughout South Dakota as well as northwest Iowa, eastern Wyoming and Montana and Nebraska. OConnor Company is part of HVAC Elements which is the marketing arm that includes G & R Controls and Balancing Professionals . The three independent businesses cover different aspects of the commercial HVAC business. Being a part of HVAC Elements allows customers easy and direct access to expertise in building controls, energy management and testing, analyzing and balancing of HVAC systems. There is no obligation to the sister companies, but the expertise is available if needed.
| Website | http://www.oconnorco.com |
| Revenue | $35.4 million |
| Funding | $2 million |
| Employees | View employees |
| Address | 4909 N Lewis Ave, Sioux Falls, South Dakota 57104, US |
| Phone | +1 605-336-0333 |
| Fax | (605) 336-8681 |
| Industry | Commercial & Residential Construction, Construction |
| Competitors | CBRE, Cushman & Wakefield, JLL Project and Development Services, Colliers, Savills, Avison Young | US, Berkadia, Marcus & Millichap, Berkeley Point Capital LLC, H F F +41 more (view full list) |
| SIC | SIC Code 3861 Companies, SIC Code 38 Companies, SIC Code 52 Companies, SIC Code 525 Companies, SIC Code 386 Companies |
| NAICS | NAICS Code 23 Companies, NAICS Code 238 Companies |
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OConnor Questions
The OConnor annual revenue was $35.4 million in 2026.
OConnor is based in Sioux Falls, South Dakota.
The NAICS codes for OConnor are [23, 238].
The SIC codes for OConnor are [3861, 38, 52, 525, 386].
