Serving the Upstate with Construction & Radon Solutions

About Quin Company

For more than 30 years, Quin Company has been built the same way I build relationships—with integrity and honesty.

A State-licensed Residential Builder and Home Inspector, an Approved VA (Veterans Administration) Contractor, and certified in radon testing and mitigation, I proudly serve homeowners, buyers, real estate professionals, and families throughout our local community with dependable, straightforward service they can trust. We specialize in:

Radon testing and mitigation
Residential renovations and repairs
Developer and Manufacturer of construction equipment
Home inspections
VA-approved projects
Expert testimony and consulting
Select handyman services

Two white pipes run vertically up the side of a beige building with trees in the background.

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Our Story

Quin Company didn’t start as a large construction firm. It began in 1991 as a small word-of-mouth handyman business. By showing up on time, treating people fairly, and standing behind my work, that small operation steadily grew into the full-service company we are today.

Over the years, we have learned that homeowners don’t just want a contractor — they want someone they can rely on who communicates clearly, explains options honestly, and respects their home like it’s their own.
That’s exactly how we operate.

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Our Team And Commitment

Quin Company is a licensed Builder and Home Inspector in South Carolina and AARST NRPP certified radon tester and mitigator nationwide. Most of our work still comes from repeat clients and referrals, which says more about our service than any advertisement ever could. I believe trust is earned through consistency, craftsmanship, and treating every customer with respect.

Whether you need radon protection for your family, a renovation done right, or a knowledgeable professional to evaluate your home, you can count on Quin Company to deliver quality work with integrity.
Local. Experienced. Trusted.

White siding walls with a large PVC pipe running along and into the floor; stairs visible in the background.

Why Choose Us?

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Standards-Driven Methods

We reference current EPA guidance and industry standards, then document decisions for clarity and compliance.

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Clear and Simple Reports

You receive concise findings, photos, and next steps—no jargon, no confusion, ever.

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Thoughtful System Design

We tailor each system to each structure with minimal visual import and low maintenance.

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Coordination With Builders And Trades

We schedule efficiently, protect work areas, and keep projects moving with fewer delays.

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Post Mitigation Testing

All Post mitigation testing will follow ANSI & ARRST industry testing requirements.

Testimonials

Customers, Realtors, Builders.

A contractor advised that they were not able to put in a window bar countertop in my kitchen without an architect and drawings. I knew that was not the case. Quin company came in and in a few short weeks, Ralph made my vision come to life with limited direction and under budget. Highly recommend for any home improvement. Honesty & Integrity still alive in the Upstate!

Lisa B.

The home inspection of my future home revealed a high level of radon present. I contacted Ralph Quin, a certified mitigation contractor who had performed the same service for my neighbors. Mr. Quin provided a free estimate of the work, performed the work without delay and will be following up with yearly testing. My realtor was so impressed with his service and work that she will be referring her future clients to him.

Mary Beth S.

My realtor recommended Ralph Quin after I bought my house and found out that the radon mitigation the previous owner had installed wasn't actually doing the job. Ralph quickly identified the real source of the problem — something the original installer had missed entirely — and designed a custom solution that properly addressed it.
He was incredibly knowledgeable, patient in explaining exactly what he was doing and why, and a genuine pleasure to work with. As a bonus, the basement looks noticeably better than it did before. I'd recommend the Quin Company without hesitation to anyone dealing with a radon issue.

Max P.

Start With a Radon Plan

Schedule testing, mitigation, or a consultation. We serve Greenville County, SC, and nearby areas. Contact Quin Company to discuss your property, timeline, and goals.

Contact Us