4.6
Based on 8642 reviews
powered by Google

Carrier Residential Factory Authorized Dealer
North American Technician Excellence - NATE - Certifying the Finest in HVACR
Mass Save | Heat Pump Installer

Your Dennis Home Runs Better with GEM

Cape Cod living comes with demands that mainland properties don’t face.

Salt air works on metal components, seasonal occupancy stresses systems that sit idle for months, and the housing stock spans generations of construction styles. Dennis homeowners need service from technicians who understand these realities.

GEM Plumbing & Heating Services, LLC serves Dennis year-round, not just during tourist season. Whether you’re a permanent resident in South Dennis or opening your family’s cottage in Dennis Port for summer, we respond same-day with the expertise Cape properties require.

When your family needs heating, cooling, plumbing, or electrical services in Dennis, trust ours. Call GEM today.

Years in Business

Skilled employees

Emergency Service

Trucks on the Road


(833) 222-2953

Year-Round Service for a Seasonal Community

Many contractors disappear after Labor Day. GEM serves Dennis through every season.

We understand that a frozen pipe in February matters just as much as a failed AC in July, and that full-time residents deserve the same attention as summer visitors. Our technicians respond throughout the year with consistent service and fair pricing regardless of the calendar.

When your Cape home needs professional attention, you deserve technicians who know the area and provide honest assessments without pressure.


Why Dennis Homeowners Choose GEM

Over 75 years of serving Massachusetts families with reliable work and honest service.

Every GEM technician, plumber, and electrician holds proper licensing, passes background checks, and maintains NATE certification.

Our fleet covers Dennis, Dennis Port, East Dennis, South Dennis, and West Dennis with responsive service.

Whether it’s your primary residence or vacation property, we respond quickly when systems fail.

Our rates don’t change based on the tourist calendar. You get consistent, honest pricing year-round.

Members receive priority scheduling, maintenance discounts, and regular service that protects vacation properties during the off-season.

Carrier Factory Authorized Dealer and National Grid certifications back every installation.

We serve Dennis residents through mild summers and harsh winters, not just peak season.


Getting the Help You Need Is Simple

Cape Cod complications shouldn’t follow you home. Getting your house fixed should be straightforward.

Call with a problem, get a qualified technician who understands Cape properties, and move forward with your day. We handle the details from diagnosis through completion.

Call or book online. We accommodate both full-time residents and property owners coordinating remotely.

Your technician assesses the situation, explains the problem clearly, and provides pricing before any work begins.

We complete repairs correctly, clean up thoroughly, and confirm everything functions before leaving.

GEM technician smiling inside residential kitchen during service call

(833) 222-2953

What Our Customers Are Saying

100% Satisfaction Guarantee

4.6
Based on 8638 reviews
Michael from Gem Plumbing was here today to do an annual check on our central air conditioning system and mini-split system. He did a thorough check of all the components inside and outside the home. He is very knowledgeable and explained everything very clearly as to what he found and observed on our systems. This service was covered under our maintenance plan with Gem so there was no charge for today. Michael is a really friendly and personable guy and he did a great job at our home.
Scott was great. Gave me my options. For now just changed the toilet fill valve. A a bit pricey, but good to have changed it
Your co. And your ees. That helped me from having no heat for 3 days and are miracle workers. They were professional from beginning to the end.
I now have the comfort or a warm home.
I would recommend your company to my friends and family.
That you.
Experience knowledgeable friendly staff
Technicians were very professional, respectful and explained exactly what they would be doing and answered all my questions.
Great job
Fast, professional, really know what they are doing! Very responsive! Came 12:30AM one night and resolved a severe leak. Great people!

Update: Doing home maintenance now for heating, air conditioning and plumbing. Doing excellent assessments. Great service, knowledgeable staff. Very happy with GEM!
B
9/6/2025—-GEM does our HVAC service.
We had one condenser stop. They came, found an electric problem, sent the electricians in their group, ordered the required electrical panel and we are back up and running.
These people REALLY know what they are doing!!
Corey Mayo took care of it this morning- he was polite, informative, and efficient.
I was very pleased with GEM plumbing. They came when they said they would and explained everything. I would highly recommend them.
Gem has always been my lifesaver and yesterday they came through again. When GEM came yesterday for the annual boiler cleaning they discovered that my boiler was leaking carbon monoxide gas. It had not been leaking the year before so carbon monoxide leaking from your burner. It’s like a tire that’s going flat in the air is coming out. It only gets worse. They gave me an estimate on replacing it, I did some research and they said that they couldn’t install it the next day. The price was in line with everything I had researched and the Bernar rated very high on Trustpilot as did the warranty. Having worked with GEM before, I trust them and I made the deal. Today two men arrived two more came then the Electrician.They got the old burner out they got the new burner installed. They cleaned up the basement and I now have heat and no carbon monoxide.Thanks for being there again GEM.
John arrived within the time window, was courteous and professional. He explained what he was doing throughout the service call.
Great service as usual. Techs were very pleasant, knowledgeable and considerate. The explained everything so I could understand it.
Very professional and was sure to explain everything that was done and the condition of the system
David was professional, courteous and knowledgeable. GEM is lucky to have him. Just wished GEM helped out with some of the cost seeing how it was just installed seven years ago but I was very please with the service David provided.
Technician Joseph Sr, was on time, knowledgeable, neat and personable. Excellent service.
Great service for the annual ac check up!
Gem did a great job installing the new furnace and A/C systems for the house, their work was on time and Gem did a great job installing the new furnace and A/C systems for the house. Their work was on time and professional as always!!
Tim did a great job. Diagnosed the problem with my generator promptly and got it back in working condition right away. Recommended for generator service.
excellent Anthony.lllldid heating tuneup.my wife and I very happy with his work.
Prompt, communicative, friendly and precise. Nicole was amazing.
I had to call Gem on a Sunday for a leaking faucet that was causing havoc to my wood floors. Orlando was the technician. He saved the day!!!! I was so thankful!! It was quick he was so nice. He should get a raise for his customer service.
Tim was terrific.. very personable and knowledgeable ..he knows what he is doing..
..
Luis and Edwin did an OUTSTANDING job in replacing my old furnace with a new one. They were thorough in every aspect of the job. From removal to the new install and clean up. Very professional and answered any questions I had. I can't thank them enough for the excellent Jobe they performed. 👍👍👍👍
Polite, professional, and diligent.
Mason was very polite and courteous. He explained everything

customer and technician interaction

Peace of Mind, Worry-Free

Maintaining your home can be stressful. Let us help.

Preserve your home’s value, extend your equipment’s life span, and ease your worries with our membership plans.

Well-maintained systems run better, last longer, and save you money on energy bills. Regular care prevents breakdowns, extends equipment life, and keeps your home comfortable year-round. When it’s time to sell, buyers notice homes with documented maintenance history.

Our screened, trained, and experienced technicians serve Dennis homes around the clock.

We’ve serviced the WWII-era beach cottages in Dennis Port where original systems have seen decades of salt exposure. We’ve maintained the historic sea captains’ homes along Route 6A where period construction meets modern comfort needs. We’ve handled emergency calls at vacation properties where systems failed after months of sitting idle, and we’ve upgraded equipment in newer construction throughout the villages.

Dennis housing reflects every era of Cape Cod development, and our technicians know what each requires.

With us, you can spend less money to take better care of your home.

Membership plans pay for themselves. You get discounted rates on service, priority scheduling when problems happen, and regular maintenance that prevents expensive emergency repairs. Efficient systems cost less to run, and catching issues early saves you from major expenses down the road.

Keep all parts of your home operating at peak efficiency with regular maintenance tune-ups.

Your HVAC, plumbing, and electrical systems work together to keep your home running. Regular tune-ups ensure everything operates efficiently, safely, and reliably. We inspect, clean, and adjust systems before problems start, so you avoid breakdowns when you need your systems most.


GEM HVAC technician standing in front of service van

Heating and Cooling Services in Dennis, MA

Cape Cod weather brings coastal humidity in summer and damp cold in winter. Your HVAC system manages unique conditions year-round.

GEM provides heating and cooling services throughout Dennis, from emergency repairs to system upgrades designed for coastal environments.

(833) 222-2953

Heating & Cooling Icon

Furnaces for Dennis Homes

Dennis winters bring the kind of penetrating cold that demands reliable heating.

Our technicians keep furnaces running through the season, whether you’re here year-round or need your system ready when you arrive. From minor repairs to full system upgrades, we provide clear guidance and dependable workmanship at every step.

  • Furnace Installation: We install furnaces selected for coastal conditions, ensuring dependable heat through Dennis winters.
  • Furnace Replacement: When your furnace reaches end of life, we upgrade to equipment that handles Cape Cod’s heating demands efficiently.
  • Furnace Repair: Ignition failures, airflow problems, and inconsistent heating all respond to our diagnostic expertise.
  • Furnace Maintenance: Annual service is especially important for vacation properties where systems sit idle between visits.
Cooling System Icon

Air Conditioning Services in Dennis

Dennis summers bring humidity that makes cooling essential for comfort, not just convenience.

Our cooling technicians keep your system running through heat waves with responsive service and lasting repairs.

  • Air Conditioner Installation: We size and install AC systems appropriate for Cape Cod’s humidity and your property’s specific needs.
  • Air Conditioner Replacement: Aging units lose efficiency, especially in coastal environments. Newer equipment handles humidity better while using less power.
  • Air Conditioner Repair: When cooling fails or humidity control suffers, we identify problems and restore proper operation.
  • Air Conditioner Maintenance: Pre-season service ensures your system performs when summer arrives, particularly important for seasonal properties.
Heat Pump Icon

Heat Pumps

Heat pumps offer efficient heating and cooling in one system, well-suited to Cape Cod’s moderate climate.

GEM helps Dennis homeowners maximize heat pump performance through expert installation, timely repairs, and regular maintenance. Our certified technicians understand coastal conditions.

  • Heat Pump Installation: We configure heat pump systems for year-round performance in Dennis’s coastal environment.
  • Heat Pump Replacement: When your heat pump loses efficiency, current technology offers significant improvements for Cape properties.
  • Heat Pump Repair: Mode failures, reduced output, and cycling problems all respond to our diagnostic approach.
  • Heat Pump Maintenance: Regular service keeps heat pumps efficient through seasonal transitions.
Ductless Icon

Ductless Mini-Splits

Many Dennis homes lack central ductwork, and additions often weren’t connected to main systems. Ductless units provide targeted climate control.

GEM’s ductless specialists design and install systems that heat and cool specific areas without requiring ductwork modifications. The result is quiet, efficient comfort exactly where you want it.

Boiler Icon

Boilers

Boiler heat remains common in Dennis homes, providing steady warmth through coastal winters.

GEM’s heating team provides comprehensive boiler services to keep your system safe, efficient, and dependable. We service both gas and oil boilers using quality components and proven techniques.

  • Boiler Installation: We match boiler capacity to your home’s distribution system for consistent, efficient heat.
  • Boiler Repair: Pressure problems, leaks, and uneven heating all fall within our expertise.
  • Boiler Maintenance: Annual service is critical for boilers in seasonal properties that sit idle for extended periods.
A piggy bank represents Mass Save rebate savings

Oil-to-Gas Conversions

Where natural gas is available, converting from oil offers convenience and often lower operating costs.

Technician Icon

Radiant Heating Systems

Radiant floor heat provides even warmth without moving air, working well in Cape homes where drafts affect comfort.

GEM installs and services radiant systems that keep Dennis properties comfortable.

Indoor Air Quality Icon

Indoor Air Quality Solutions

Coastal humidity affects indoor air quality, and proper management makes homes more comfortable year-round.

GEM offers filtration, purification, and humidity control that improves indoor air quality throughout your Dennis home.

Smart thermostat Icon

Thermostats & Smart Home Devices

Smart thermostats let you monitor and adjust conditions remotely, valuable for vacation property owners tracking their Dennis home from anywhere.

GEM installs connected devices that provide control and visibility for local and remote owners.

GEM Plumbing Heating Cooling u0026 Electrical branded technician portrait

Complete Plumbing Services in Dennis, MA

Cape Cod plumbing faces unique challenges from seasonal use and coastal conditions. When problems arise, you need help fast.

GEM’s licensed plumbers serve Dennis with expertise in the specific issues Cape properties encounter.

(833) 222-2953

Water Heaters

Water Heater Repair & Replacement

Hot water is essential whether you’re here year-round or just arriving for the weekend.

GEM services tank and tankless water heaters throughout Dennis.

  • Traditional Water Heater Installation: We install water heaters appropriately sized for your property’s usage patterns and occupancy.
  • Traditional Water Heater Replacement: When tanks fail, we replace them with equipment matched to Cape Cod conditions.
  • Traditional Water Heater Repair: Heating problems, leaks, and corrosion issues all respond to our expertise.
  • Traditional Water Heater Maintenance: Regular service extends tank life, especially important in coastal environments.
  • Tankless Water Heater Installation: On-demand systems work well for vacation properties with variable occupancy.
  • Tankless Water Heater Replacement: When tankless units age out, current models offer improved performance.
  • Tankless Water Heater Repair: Error codes and temperature problems indicate issues we can diagnose and resolve.
  • Tankless Water Heater Maintenance: Annual descaling maintains tankless performance in areas with hard water.
Drain Cleaning Icon

Drain Clog Removal & Sewer Services in Dennis

Salt, sand, and seasonal debris affect Cape Cod drains differently than mainland properties.

GEM’s drain cleaning removes buildup and restores proper flow throughout Dennis homes.

  • Kitchen Drains: Grease, food waste, and soap build up inside pipes, gradually reducing flow. Professional cleaning removes deposits before complete blockages form.
  • Bathroom Drains: Hair, soap scum, and personal care products combine into tough clogs that standard methods can’t clear.
  • Basement and Utility Drains: Floor drains collect debris and sediment that cause backup during storms if not cleaned regularly.
Water Treatment Icon

Water Filtration & Water Quality Improvements

Cape Cod water quality varies by location, and many Dennis homes benefit from treatment systems.

GEM installs solutions tailored to local water conditions.

Well Systems Icon

Well System & Well Pump Repair

When your well pump malfunctions, household water supply stops completely. GEM provides professional well pump services including installation, repair, and replacement to maintain dependable water flow for Dennis area properties on private wells.

Remodel Icon

Kitchen & Bath Remodels

Outdated plumbing fixtures affect both the function and value of your Dennis home.

Corroded faucets, sluggish drains, and inconsistent pressure indicate systems ready for upgrades. GEM’s plumbers install modern fixtures that improve daily convenience while complementing your home’s style.

  • Kitchen Faucets
  • Bathroom Faucets & Toilets
  • Garbage Disposal
  • Hot Water Dispenser
  • Drinking Water Filter
  • Appliance Hook Up
  • Cooking Upgrades
  • Spa Bathroom
Leaks Icon

Plumbing Leaks

Ceiling stains, musty odors, and dripping sounds often signal hidden leaks causing ongoing damage.

In older Dennis properties, worn connections and aging pipe materials frequently develop small leaks that grow into expensive problems. Our technicians use specialized detection equipment to locate leaks precisely, complete permanent repairs, and prevent water damage from spreading through walls, floors, and foundations.

Hydro Jet Icon

Hydro Jetting

When standard drain snaking can’t clear stubborn blockages, hydro jetting scours the entire pipe interior with high-pressure water.

This service safely removes grease accumulation, tree root intrusion, and years of buildup from Dennis drain lines. Hydro jetting restores full flow capacity and reduces future clog frequency throughout your plumbing system.

Maintenance Icon

Sump Pumps

Dennis properties face groundwater pressure, and sump pumps protect basements and crawlspaces from water damage.

GEM keeps these essential systems functioning reliably.

  • Sump Pump Installation: We install pumps with capacity appropriate for your property’s drainage needs.
  • Sump Pump Replacement: When pumps fail, we upgrade to equipment that handles local conditions.
  • Sump Pump Repair: Pumps that run constantly or fail to activate need attention before the next storm.
  • Sump Pump Maintenance: Regular testing is especially important for seasonal properties.
Licensed GEM electrician working inside electrical panel

Power Your Home With GEM’s Dennis Electricians

Coastal conditions affect electrical systems, and salt air accelerates corrosion. Professional service keeps your Dennis home safe.

GEM’s licensed electricians handle residential electrical needs throughout all five villages.

(833) 222-2953

Generator Icon

Standby Generator Repair & Installation in Dennis

Cape Cod sees power outages from storms, and generators keep essential systems running.

GEM installs and maintains backup power for Dennis properties. We guide you through selection, handle installation, and provide ongoing service.

  • Generator Installation: We size generators for your home’s critical loads and install them for reliable automatic operation.
  • Generator Replacement: When generators become unreliable, we upgrade to current equipment.
  • Generator Repair: Generators that won’t start or run poorly need service before the next outage.
  • Generator Maintenance: Regular service ensures your generator activates when needed.
Lighting Icon

Indoor & Outdoor Lighting Design

Proper lighting enhances Cape homes inside and out, from living spaces to landscape features.

GEM electricians install lighting solutions that enhance your Dennis property.

  • Indoor Lighting: Recessed fixtures, pendant lights, under-cabinet illumination, and accent lighting tailored to your Dennis home’s style and function.
  • Outdoor Lighting: Durable, efficient landscape and security lighting for walkways, driveways, patios, and yards that improves safety and curb appeal.
Electrical Panel Icon

Electrical Panel Upgrades

Your electrical panel must safely handle your Dennis home’s power demands as you add appliances, devices, and technology.

GEM’s electricians evaluate your current capacity, explain upgrade options, and install panels that deliver reliable power with room for future needs.

Commercial Icon

Commercial Electrical Services

Dennis businesses depend on consistent electrical service to operate efficiently and safely.

Our commercial electricians serve retail locations, office buildings, and light-industrial facilities throughout the community. We handle lighting upgrades, panel work, safety inspections, and emergency repairs that keep local businesses running.

Icon representing electrical services

Surge Protectors

Storm activity, grid fluctuations, and aging infrastructure expose Dennis homes to damaging power surges.

Whole-home surge protection installed at your electrical panel guards every circuit and connected device against voltage spikes that destroy electronics and appliances.

Rewiring service icon representing professional plumbing repairs

Rewiring & Wiring Installation

Older Dennis properties often contain wiring that cannot safely meet modern electrical loads.

Flickering lights, frequently tripped breakers, and outlets that feel warm indicate systems needing professional attention. GEM replaces outdated wiring to current codes, delivering safe, reliable power throughout your home.

Equipment Icon

EV Chargers

Home charging makes electric vehicle ownership more practical and convenient for Dennis drivers.

GEM’s certified electricians install Level 2 chargers in garages and driveways, providing faster charging speeds and professional wiring that meets safety standards.

Detector Icon

Carbon Monoxide & Smoke Detector Installation

Properly placed and maintained detectors provide critical early warning against invisible dangers.

Our electricians install smoke and CO detectors in optimal locations throughout your Dennis home, test each unit, and ensure battery backup systems function correctly.

Smart Phone Icon

Smart Home Installation

Connected devices and smart home systems add convenience, efficiency, and control to modern Dennis homes.

GEM’s electricians install and integrate smart thermostats, lighting controls, security components, and energy monitoring systems that work together seamlessly.

Ready for Reliable HVAC, Plumbing, and Electrical Services in Dennis?

Cape Cod deserves year-round service from professionals who understand coastal properties.

GEM has served Massachusetts families since 1949. Call us or schedule online for same-day response throughout Dennis.

GEM technician in front of service truck


Frequently Asked Questions

What areas does GEM serve on Cape Cod?

GEM serves Dennis and communities throughout Cape Cod, the South Shore, and all of Rhode Island. Our fleet provides responsive service across the region.

How quickly can I schedule service?

Same-day appointments are available for most calls. We accommodate both local residents and property owners coordinating from off-Cape.

Are your technicians licensed and insured?

Every GEM technician, plumber, and electrician carries proper licensing and insurance. HVAC specialists hold NATE certification.

Do you service vacation properties?

Yes. We work with property owners and managers to maintain seasonal homes, including pre-season preparation and emergency response when owners aren’t present.

How can I protect my property during the off-season?

Regular maintenance catches problems before they cause damage. GEM’s Home Comfort Club includes scheduled service that helps Dennis property owners avoid surprises.