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50+ Years
experience
Emergency
services
Trusted Plumbing & HVAC Services in Lexington, MA
As a family-owned business with nearly a century of experience, we have built a reputation on delivering exceptional service rooted in integrity and expertise. Our father-and-son leadership team, representing the fifth generation of our family, combines decades of hands-on knowledge with a commitment to innovation, ensuring every project meets the highest standards of quality. Headquartered in Lexington, Massachusetts, we specialize in plumbing, heating, and cooling solutions designed to enhance home comfort, safety, and health while leveraging cutting-edge technology to improve outcomes.

Our dedication to transparency, reliability, and customer satisfaction has made us a trusted name in the region, serving both residential and commercial clients with personalized attention. With 93 years of continuous operation, we remain focused on evolving with industry advancements while maintaining the core values that have defined our legacy.
Services
Plumbing Services Heating Installation Emergency Repairs Gas Line Repair Water Heater Installation Sewer Line Repair Drain Unclogging Backflow Prevention New Construction Plumbing Re-piping Services
Details
  • Year established: 1930
Highlights and features
  • We offer 93 years of experience in plumbing and heating solutions.
  • Our fifth-generation family team ensures personalized, trustworthy service.
  • We provide comprehensive plumbing, heating, and cooling services under one roof.
  • Our experts use advanced technology to deliver efficient, long-lasting results.
  • We offer emergency heating services to resolve urgent issues promptly.
Services
Plumbing Services
Our plumbing services include re-piping, drain unclogging, sewer line repair, and backflow protection. We specialize in natural gas line installation, water heater replacement, and well pump services. Using advanced techniques like video inspection and pressurized jetting, we ensure durable, code-compliant solutions for residential and commercial properties.
Heating Installation
We install energy-efficient furnaces and ventilation systems for new constructions or replacements. Our team provides emergency heating repairs, furnace maintenance, and temporary heating solutions during winter breakdowns. All installations meet strict safety and efficiency standards to ensure long-term reliability.
Emergency Repairs
Available for urgent heating failures, our emergency services prioritize rapid response to restore warmth and safety. Technicians address furnace malfunctions, gas leaks, and frozen pipes, offering temporary heating options if immediate repairs aren't possible. Service is available outside regular business hours for critical needs.
Gas Line Repair
We install, repair, and retrofit natural gas lines with strict adherence to safety protocols. Our experts handle gas line diagnostics, corrosion repair, and pressure testing to prevent leaks and ensure compliance. Services include both residential and commercial gas system upgrades for optimal performance.
Water Heater Installation
We offer gas, electric, and tankless water heater installations tailored to household needs. Our team evaluates efficiency, space, and usage patterns to recommend ideal systems. Services include well pump installation, tank replacement, and troubleshooting for consistent hot water supply and energy savings.
People
Lawrence Sweet
Owner
Fifth-generation plumbing expert with over 40 years of industry experience, Lawrence leads with a commitment to quality and customer satisfaction.
Dan Sweet
Co-Owner
Dan Sweet, Lawrence's son, brings modern expertise to the family business, focusing on innovative heating solutions and client communication.
Questions
What services does Sweet Plumbing and Heating offer?
We provide plumbing, heating, and cooling services including installations, repairs, emergency support, gas lines, water heaters, and sewer line solutions.
Do you offer emergency heating repairs?
Yes, we provide 24/7 emergency heating services with temporary solutions available during winter breakdowns.
Are you licensed and insured?
As a fifth-generation family business, we maintain all required licenses and insurance for plumbing and HVAC work in Massachusetts.
What areas do you serve?
We primarily serve Lexington, MA, with plans to expand our service area while maintaining personalized attention.
How do you handle unexpected repair costs?
We provide upfront estimates and notify clients immediately if additional costs arise during service.