4.6
Based on 3435 reviews
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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 3435 reviews
powered by Google
Richard Riquier profile pictureRichard Riquier
13:12 23 Jul 24
Leak in kitchen. Technician was quick and professional. I’ve used gem in the past and have always had a good experience.
Brian Bessette profile pictureBrian Bessette
16:08 16 Jul 24
Nate came out first thing in the morning to help with my clogged sewer main. He was very professional and kind. He explained everything with no difficulty and offered multiple cost-tiered options. Mainly whether we would utilize a camera in the process of snaking the main. I appreciated being offered the option. We went with the camera process. So we could fully diagnose the issue, and determine if this would be a recurring problem.
We found roots growing in an old, 2-foot, cast-iron section of my main drainage pipe.
He used a blade attachment and cleared the obstruction to the best of his ability. Then left me with a quote to have the 2-foot section of cast iron replaced with PVCโ€”which is only a small section that penetrated the foundation of my home.
I was very happy with the service, and most importantly the transparent approach which allowed me to make informed decisions.
Nateโ€™s customer service skills were out of this world. I advise GEM Plumbing to invest in this young man.
Matthew Bodziony profile pictureMatthew Bodziony
16:02 16 Jul 24
Incredible company.
I had two whole house central AC units replaced (19 yrs old) and their team and other parts of the company (Plumbling, electrical, etc.) worked together to do an unbelieable installation in very hot conditions. My hats off to your company and we are so impressed that I contracted GEM to install a whole house 25kw generator.
The team was:
Alec Reyes
Marcus Mendoza
Roger Ribeiro
Richard Kadison profile pictureRichard Kadison
20:05 11 Jul 24
I was able to schedule an appointment for the next day. The technician was great. Chris went over everything that needed to be done and explained it clearly. Very professional. He was also able to offer a discount and waived the fee for the service call. When I reviewed the bill that night, there was an error and the fee hadnโ€™t been waived. When I called Gem the next day, they saw the error and immediately corrected it. Said the refund would be put on my credit card. Very happy with the service.
DebraJean Fournier profile pictureDebraJean Fournier
14:18 22 Jun 24
I am very happy with my well water pump service. David Chapman and his associate were professional, friendly and respectful. David showed me how to change my filter for which I am truly grateful.
It was super easy booking online The next day the dispatcher, (unfortunately I donโ€™t know her name) called to offer an earlier appointment. She was very polite and kind.
My whole transaction was smooth and pleasant from start to finish!

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.

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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.

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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.

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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.

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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.

  • Water Purifier System Installation: Whole-home purification improves water quality from every tap.
  • Water Softener Installation: Soft water prevents scale buildup and improves appliance life.
  • Water Softener Maintenance: Regular service keeps softening systems effective.
  • Water Softener Repair: When softeners malfunction, we identify and fix the problem.
  • Water Softener Replacement: Aging units lose effectiveness. Modern equipment performs better with less maintenance.
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.

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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.

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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.

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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.

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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.

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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.