I’ve had the pleasure of working with Olson Development for the past 25 years. Their quality, professionalism, and attention to detail cannot be surpassed. Projects are exceptionally designed, constructed, and managed, from start to finish. Our company has enjoyed working with Mark and his team and look forward to future projects.

– Custom Glass Company, CT

Olson Development did the most fabulous renovation on my home! They finished my entire lower level, added a wraparound deck, a three season porch, renovated two bathrooms, and designed and installed custom entry stairs.

The craftsmanship by Olson Development was extremely high quality. The company workers were respectful, communicative, and honest. The job site was always well managed, neat and safe.

It is rare to encounter a company that embodies great integrity, great talent and a business acumen that puts you at ease from start to finish during your construction project.

I sing the highest of praise for Olson Development because they truly earned it.

-R. P. East Haddam, CT

Olson Development, LLC recently completed a wonderful renovation of the basement in my 215-year-old farm house. We were at wits end living with a dirt cellar for over 20 years that was constantly damp, musty and even flooded in adverse weather conditions. Mark Olson and his professional team designed a plan to excavate the soil; install a Stego vapor barrier; rigid insulation and a four inch reinforced concrete slab to completely change the environment of our basement and the rest of our antique home. The project also included installing new support columns for the chestnut floor beams; a high-efficiency propane hot water burner; beautiful new wooden basement stairs and closed cell insulation on the basement ceiling.From the onset, it was clear that Mark and his team, take pride in their work offering the highest level of craftsmanship despite the adverse conditions of working in a 215-year-old home. The quality of work was superior exceeding my expectations and each day, the workmen took extra time to clean up after their days work leaving the project in a pristine state. The project was completed in the time-frame that was promised and on

From the onset, it was clear that Mark and his team, take pride in their work offering the highest level of craftsmanship despite the adverse conditions of working in a 215-year-old home. The quality of work was superior exceeding my expectations and each day, the workmen took extra time to clean up after their days work leaving the project in a pristine state. The project was completed in the time-frame that was promised and on budget.

The workmen were all expert craftsman that took a great deal of pride in their work.

-R.M. Newtown, CT