It's important to choose a local plumber, heating & A/C contractor that you can depend on. GSMS has over three decades of experience, holds an A+ rating with The Better Business Bureau of NH, is fully licensed, and has factory trained technicians. Our GSMS Difference will complete your checklist when it comes to finding the right contractor. With our Start-Right Promise (which comes with every new installation) we promise that you'll have no issues in the first two years or we'll make it right.
Business highlights
37 years of trusted experience
Emergency Services Offered
Services we offer
Residential and light commercial, plumbing, heating, cooling, high efficiency installs, warranted service, new installations & retrofits.
Fantastic job and professional service from the time I contacted GSMS to make an appointment to the promptness of providing a report and invoice for their services. Their website is well designed and very easy to use. I received a call shortly after I submitted a request to book an appointment. Zak was friendly and an appointment was booked in no time! Mark was punctual and provided professional service while explaining the type of furnaces we have. I will definitely use GSMS again and highly recommend them.
Description of Work: Furnace tune up
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$125
Response from Granite State Mechanical Services Llc
Thank you for your review, [Member Name Removed]! I'm so glad to hear that you are joining our growing family of lifelong clients. We work hard to make sure our team of Service Specialists deliver the exact experience you described. We look forward to working with you in the near future. Have a "Granite" Day! -Zak
Joe L.
10/2018
5.0
heating & air conditioning/hvac, plumbing, water heater repair
 + 1 more
I have used GSMS for several projects over the years. The are always professional and provide excellent service. This service was for the replacement of a gas forced hot air furnace with a high efficiency gas forced hot air furnace. Over the years I have used GSMS during a kitchen remodel, a master bath remodel, upgrade of Air Conditioning and the installation of an on-demand gas water heater. I highly recommend them!
Description of Work: Furnace Replacement & Upgrade
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$5,000
Response from Granite State Mechanical Services Llc
Thank you for speaking so highly of us, [Member Name Removed]! We're glad to have a client like you. Stay warm and I hope you're enjoying your new heating system. -Zak
Lori B.
01/2016
5.0
heating & air conditioning/hvac, plumbing, water heater repair
 + 1 more
My experience with GSMS was very good. They are punctual and I can count on the job being completed professionally. Water leaks can be a challenge to identify and resolve, but through careful analysis and checking multiple areas that could be the source of the problem, they were able to address the situation and take care of the problem.
Description of Work: Replaced a hot water tank. Also diagnosed & made the necessary repair to resolve a water leak coming through the ceiling.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$1,800
Response from Granite State Mechanical Services Llc
Thank you for sharing your GSMS experience with the Angie's List community. We greatly appreciate your kind and honest words. -Zak
Suzanne E D.
02/2015
5.0
heating & air conditioning/hvac
 + -1 more
unknown
Description of Work: New furnace----great
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$4,000
Cheryl F.
06/2014
5.0
heating & air conditioning/hvac
 + -1 more
Our high velocity air-conditioner system was serviced 3 weeks ago for it's annual check by another company we have used, but had little confidence in, and lo and behold, it has not been working properly. Granite State Mechanical was referred to us by our contractor, and we are so appreciative of that! Mark and Zack were extremely responsive, and accommodated my and quot;cry for helpand quot; with same-day service. They provided an estimate of arrival time, then called as they were leaving the prior job to let us know that they were en-route, and arrived right on-time. After putting shoe-coverings on as soon as they entered the house (thank you so much for your kind consideration!), they immediately got to work, promptly assessed the problem, took the time to explain what needed to be done and why, and worked very efficiently. Their pricing was reasonable, and we are very pleased with their work. They kindly took us on as new customers, and we look forward to working with them for years to come. Thank you so much for your professionalism, expertise, and a great experience! :)
Description of Work: Replaced faulty wiring in compressor unit.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$267
Contact information
724 E Industrial Park Dr Unit 16, Manchester, NH 03109
All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.
*Contact business to see additional licenses.
Service Categories
Heating and Air Conditioning,
Water Heaters,
Plumbing,
Natural Gas Lines,
Air Duct Cleaning
FAQ
Granite State Mechanical Services Llc is currently rated 5 overall out of 5.
Sunday: Open All Day
Monday: Open All Day
Tuesday: Open All Day
Wednesday: Open All Day
Thursday: Open All Day
Friday: Open All Day
Saturday: Open All Day
Granite State Mechanical Services Llc accepts the following forms of payment: American Express,Check,Discover,MasterCard,Visa
Yes, Granite State Mechanical Services Llc offers free project estimates.
Yes, Granite State Mechanical Services Llc offers eco-friendly accreditations.
No, Granite State Mechanical Services Llc does not offer a senior discount.
Yes, Granite State Mechanical Services Llc offers emergency services.
Yes, Granite State Mechanical Services Llc offers warranties.
Granite State Mechanical Services Llc offers the following services: Residential and light commercial, plumbing, heating, cooling, high efficiency installs, warranted service, new installations & retrofits.
Drain clearing.
Contact information
724 E Industrial Park Dr Unit 16, Manchester, NH 03109