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Custom Home Building with Sobieski.


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Whether it’s a custom home project in the greater Wilmington area, on the Main Line in Pennsylvania, or at the Delaware beaches, you need a partnership with the right mechanical firm.


Our current custom home builder clients began seeing the Sobieski Difference from the initial design consultation and continued to see it all the way through the process, ending with the finished build. Thatdifference is that we understand that every detail is important and ultimately will reflect back upon the builder and it's in our best interest to improve your reputation through the quality of our work.

The systems that need to function both properly and efficiently will drive the comfort of the home and the satisfaction of the owner. Sobieski maintains the in-house proficiencies and tenured staff that will be your professional consultant, trusted advisor, and reliable team during the entire process. Based on the home’s design and the system preferences from either the builder or end client, we will assist in the process of deciding on the most efficient options.


When you as a builder choose Sobieski for your custom home HVAC and plumbing installation, you will also be providing your client a partner for life. We have built our custom homes division with long term support in mind. Your clients will know that Sobieski’s service teams will be available to service and maintain their home’s complex systems for years to come.

30 years ago, J. F. Sobieski, Inc. was founded with a clear idea of what we would need for a successful future. Our company has always put a strong emphasis on high quality service and customer satisfaction. The way we conduct our business has an impact on our customers, families, Sobieski staff and management teams, subcontractors, and the community. Our goal has always been to help build lasting relationships with every client we serve, to solidify the gains we have made, to grow in new ways and to always be ready to serve our customers whenever they need us.

Our goal at Sobieski is to earn your trust while offering you and your clients the highest quality service. That’s why we focus on our three core values to make sure you can count on us:

  • Integrity - All members of our team have integrity in every decision they make.
  • Family - We treat our team like family, so our employees are happy, loyal and trustworthy.
  • Courage - Everyone who is a part of Sobieski has the courage to make the right decision at all times.

From the very beginning, customer satisfaction has been our number one priority. We hold ourselves to the highest of standards and have earned industry recognition and various awards. Sobieski has an A+ rating with the Better Business Bureau and hold many designations with HomeAdvisor and other industry affiliates. We have also received a number of awards from industry leading manufactures. Sobieski has always promoted maintaining a safe job site and for that effort we have also been awarded the Safety Training and Evaluation Process (STEP) Award and received multiple Excellence in Construction Awards by Associated Builders & Contractors.


At Sobieski, we have over three decades of expertise in designing and installing complex custom mechanical and plumbing systems. Our team of project managers, designers, and expert installers will ensure the homeowner will live comfortably in their custom home with well-designed, high- quality, and energy efficient heating and cooling systems. Along with ensuring the end result includes efficiently-designed and durable plumbing systems.

When you choose Sobieski for your custom home HVAC and plumbing installation, you’ll have a partner for life, since we can also continue to service and maintain your home’s systems.


We invite you to review a few case studies that we have included in our Custom Homes Brochure to illustrate firsthand what our amazing team is capable of providing you and your clients.


Are you ready to select the plumbing and mechanical contractor for your custom home build? Contact us or call 866-477-4404 to learn more.

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  • I am a retired superintendent, and I have dealt with many people of different fields. I found Sobieski Services, Inc. to be very professional. The people who did the installation were very well-mannered and professional. I oversaw their work from salesman to workman.

    Orval L F., Wilmington, DE
  • Sobieski replaced my air conditioning unit. It went very smoothly! They were on schedule, on time, and there were absolutely no issues. They were very professional!

    Jeffrey S., Philadelphia, PA
  • I have worked with different contractors before, and they do not compare to Sobieski Services. They are very professional and a great organization; everyone from sales to the technical people work as a team. They were great with keeping in touch with me by returning each phone call on time.

    Arjun K., Lafayette Hill, PA
  • Technician was friendly and knowledgeable. After fixing my Heat Pump, and speaking with him throughout the day, I would have gladly invited him over for dinner. Service was great and things are working as they should.

    Jeremy W., Elkton, MD
  • I received a courtesy call asking if my technician could come earlier than the scheduled time. He greeted me at the door with a smile, put booties over his shoes to keep my floor clean and explained what he was planning to do.

    Nikki L., Elkton, MD