Premier general contractors

Serving the Black Hills of South Dakota and surrounding areas.


We specialize in New Custom Homes, Ag and Commercial Buildings along with many other construction projects in the Black Hills and surrounding area. With over 20 years of experience, we are known for our excellence in craftsmanship and attention to detail. 

Expert General Contracting

New Custom Home Construction

Remodels & Renovations

Concrete & Flatwork

Let us help you turn your next project into reality!

What our Clients are Saying…

Pro Form Concrete, LLC

Pro Form Concrete, LLC has done business with Firefly Builders, Inc and found their Company excellent to do business with. Very professional, personable, and prompt, we found that they have a real understanding of the general contracting business as it pertains to the subcontractor & homeowner, realizing what information the subcontractor needs as it relates to what the home owner’s expectations are.  Thanks for giving us your business!

– William Ritola, Owner, Pro Form Concrete LLC

Watford City Homes Inc.

My company Watford City Homes Inc. has been doing business with Firefly Builders, Inc for several years. They have been a great company to work with. Wayne the owner of the company is a man of his word. If he tells me something he stands behind it. Very rare in this day in age. I have not been able to find a problem they can’t help me out of. The last job Firefly did for me was 10 hours from the office. Wayne went way beyond what he was paid to do to help me. While his family sat in a hotel room he stayed an extra day just to help me and my customer with their new home. If you ever need a contractor to treat you like family, this is the company to hire. I will never forget the great job they have done for me.

– Shane Moran, Managing Director, Watford City Homes Inc.

Brandon & Karla Young

Firefly Builders, Inc is a great company to hire to build your new house. They get the job done in a timely manner and do an awesome job. We could not be happier with the service, quality, and the kindness shown by Firefly. It was an amazing experience and my new home looks great. We would recommend Firefly to anyone needing a General Contractor.

-Brandon & Karla Young

Rick Furnish

Firefly re-sided my house recently. When I was looking for a contractor the lumber yard recommended them. I had heard of the company, but was tentative about hiring them since I did not know their work personally. On that one recommendation I hired them, and I am so thankful that I did!. The crew was polite, knowledgeable, and efficient. They were very good about keeping me in the loop regarding progress, and making sure I was satisfied. When they were conscientious about leaving the job site clean and picked up each night (it is amazing how many contractors do not do this!). They work HARD , and some long hours at times, to get the job done. Their quality was exceptional, and though they were not the cheapest, they were worth every penny! I look forward to using them for future projects and hope you will too!

– Rick Furnish, Spearfish, SD