Fine Home Building | Construction Management | Estate Maintenance

We excel in creating more than just homes; we build personalized spaces where your family’s story can unfold. Our dedicated general contracting team transforms your needs and vision into reality, infusing each room with your unique character and personality. We handle the substantial construction work, keeping you up to speed on the progress along the way.

Our approach is marked by meticulous attention to construction budgets, timelines, project coordination, and the intricate building process. We operate with proactive awareness, ensuring seamless progress from concept to completion. With 15+ years of industry expertise, we have a proven track record of delivering personalized and responsive new home, renovation and residential addition construction services. We bring a personal touch and a dedication to customer service while also building beautiful, livable, and enduring spaces.

At HSL Build, our passion lies in creating homes and spaces that stand the test of time. We have won numerous awards, work with premier architects, but it is our home owner testimonials and satisfaction that gives us the most pride. Contact us today to experience our expertise and transform your dreams into lasting, exceptional realities. Discover the difference of personalized construction with HSL Build, where your vision becomes our masterpiece.

Founder Erno Bacso 

Erno is a seasoned engineer, project manager, and master tradesman whose reputation for enthusiasm, dedication, and precision is as strong as the fine homes he crafts. Working closely with a network of architects, interior designers, and contractors ensures success - regardless of the construction project’s uniqueness. He and his HSL Building team are guided by a strong moral fiber and form relationships that last much longer than the term of the project.


Trusted & highly regarded. Our Client’s Satisfaction Speaks for itself

Over the years, Erno and his team have developed a reputation for quality and candor. Our client’s satisfaction is extremely important to us and positive referrals remain the most valued ‘thank you’ we can receive.

We highly recommend the HSL team. We first met Erno Bacso about 6 months before demolishing our existing home and starting over. Since then we’ve been impressed with the level of attention to detail and craftsmanship they have brought to building our home. The HSL team is professional, kind, responsive, conscientious, trustworthy and knowledgeable. Weekly meetings helped us to communicate about big decisions and work through smaller details. From start to finish their attentiveness and focus on quality has been unwavering. The HSL team is a pleasure to work with and built a home that has exceeded our expectations.

Heike S.H.

HSL is simply the best building company you could ask for! Working with Erno Bacso and the entire HSL team was an absolute dream! HSL was there every step of the way to make sure that our renovation ran smoothly and was completed on time and within budget. The team at HSL could not have been more accommodating before, during and after our project, making sure that every detail was completed to our utmost satisfaction. Erno is a true professional and did a fantastic job coordinating with every trade, especially the design and architect firms, who were both also amazing. We highly recommend Erno and the entire HSL team!

Donna S.

We were fortunate to work with Erno Bacso and his company, HSL, on a major renovation of our home including expanding the kitchen into adjacent rooms & installing a second floor deck. We are pleased with his work and with the results. Erno and his subcontractors do high quality work and care very much about satisfying their client while staying on budget. His subcontractors (such as carpenters, cabinetmakers, and painters) are friendly, decent people who were serious about the work and were a pleasure to have at our house. Now that the job is done, we miss them! Some of our work was quite challenging as we created a modern space in an 1867 farmhouse, and Erno and his team were creative and resourceful in giving us the sort of space, finishes, and feel we wanted. We recommend Erno and his company HSL highly for their work, their conscientiousness and their integrity.

Regina K.

HSL Building company ran our project from scratch to finish, turning a concept sketch into our dream home. Throughout the entire process, Erno was professional, transparent, reliable, and always found an elegant solution to even the most baffling of construction issues. He made sure that we were involved in all aspects of the process, and provided us with multiple options and price quotes at every step on the way. Most importantly, Erno is a genuinely nice person who treated everybody involved in the construction with kindness and respect. We have already retained Erno to do our estate management and to do a follow-up project on our house. He is a pleasure to work with, and we warmly recommend HSL Building Company to anybody contemplating a construction project.

Leif A.

Erno did an absolutely outstanding job with our major renovation. He established a productive working relationship with our architect, coordinated the various trades, kept them on schedule, and on budget. You can see that he commands the respect of colleagues and workers. We would hire HSL Building Company again without hesitation!

Brian C.

We found Erno to be at all times professional, courteous, and a pleasure to work with. Erno took the time to understand our requirements, and then quickly offered us appropriate choices and quotes. He and his HSL Building team are reliable, punctual, efficient and friendly. It is so good to work with Erno Bacso who follows through with all he sets out to do for us. We highly recommend his services.

Stuart G.

HSL was hired as the general contractor on a major renovation for a project where I was the Owners Rep in Greenwich, CT. Erno was consistently diligent, fair and responsive throughout the entire process and coordinated effectively with the entire team that was assembled to manage a complex series of phases to renovate a 1890's victorian home. His crew was professional and considerate and they did an excellent job facilitating a complex series of tasks.

Owners Rep

I have had the opportunity to work with Erno Bacso and the HSL Building Co. on quite a few projects. I can attest that it was a pleasure dealing with them and the projects we did together stand as proof to that. Their attention to details and overall quality of service is immaculate. From an architect point of view HSL is the one of the best team players around, if not the best. Their overall reputation speaks for itself. Exquisite indeed.

Studio Dumitru Architects

We worked with HSL Building on a major renovation of our Westport home and are thrilled with the end-result. During the renovation, we found both Erno (the owner) and Jay (our project manager) to be professional, responsive, organized, engaged, and very committed to delivering quality work. They also had a great collaborative relationship with our architect. We have continued to work with Erno on some small projects and he is always polite, kind and just an all-around nice person who seems genuinely excited about what he does. I am sure we will continue to work with HSL Building for years to come.

Emyluz R.

I have known Erno Bacso for many years and he has helped me with a number of renovation projects. He is polite, responsive and easy to work with. I recommend HSL Building Company.

The Well Appointed House