# Monomoy Mechanical, LLC

**Trade:** HVAC / Heating & Cooling · **Address:** 21 Fruean Ave L, South Yarmouth, MA 02664 · **Phone:** (508) 623-6952 · **Website:** https://www.monomoymechanical.com/ · **Languages:** English, Spanish

**Rating: 4.6/5** (high confidence) — from 182 reviews across 6 sources. A 0–5 star rating built from what customers and the public say (every review and mention weighted by where it was posted, how old, how detailed and how credible it is, shrunk toward a 3.5★ baseline when evidence is thin) plus what the record shows (Reddit recommendations or warnings, a registry-verified licence, how recently they were reviewed, customer work photos, BBB grade, negative news, a revoked licence). Positive record counts only as far as the reviews have earned it; penalties count in full. Confidence describes how much weighted evidence stands behind the number, never the number itself: low when fewer than about five normal reviews' worth of weight (or mentions only) support it, medium up to about twenty, high beyond that across at least two sources. An operator flag for a suspicious review pattern caps a rating at 3.5★ and marks it low.
98% of sentiment-scored reviews read net-positive. Last 6 months: 81 reviews, 0 negative.

## The honest read

Monomoy Mechanical, LLC is a South Yarmouth heating and cooling contractor whose name comes up on Cape Cod the way a good HVAC company usually does — when the air conditioning quits in a heat wave. Its Massachusetts sheet-metal licence, 17709-SM-A, is verified active in the state registry, with Nicholas Kenneth Gouveia as the holder of record.

The written record is deep and recent: 182 reviews on file across six sources going back to 2023, 4.9 stars from 254 Google ratings, and 81 reviews in the last six months with none of them negative. What homeowners describe most often is speed — a call answered the same afternoon, a technician arriving inside 24 hours during a July heat wave, and one late-night emergency visit the customer said carried a reasonable after-hours charge.

The second theme is the crew itself. Reviewers name individual technicians — Dave, Matt, Tim D., Josh T., Oriano, Justin, Connor, Jay, Troy, Dustin and Jake, plus Monica in the office — and the praise is consistently about being walked through the diagnosis rather than just handed a bill. On bigger jobs that turns into detail: a mini-split installation finished on schedule with a patient walkthrough of how to run the system, and a heat-pump job where the crew replaced dampers and adjusted ductwork to even out cooling between floors.

The one blemish worth raising is about the front end, not the work. In November 2025 a reviewer said they asked for an estimate and a lead time on what they called a fairly simple plumbing job, exchanged several texts, and got neither — so if what you need is a quote on plumbing rather than heating and cooling, pin down who owes you the number and by when.

They are the straightforward call for Cape air-conditioning, mini-split and heat-pump work, especially anything urgent in summer. Confirm the licence number against the state registry, ask which technician is assigned, and get the scope and price in writing before the truck rolls.

**Strengths:**
- Same-day response — reviewers describe calls answered and repairs done within hours
- Clear explanations — named technicians walk homeowners through the diagnosis
- Mini-split installs — finished on schedule with a full system walkthrough
- After-hours calls — late-night AC repair at a charge the customer called reasonable
- Duct corrections — heat-pump job fixed uneven upstairs-downstairs cooling

**Concerns:**
- Quote follow-through — a 2025 reviewer got no plumbing estimate after several texts

**Where sources disagree:**
- Nearly every review praises how fast they respond, while the single one-star review says a request for a plumbing quote went unanswered through multiple text exchanges.

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- Massachusetts HVAC (sheet metal) licence 17709-SM-A is verified active in the state registry, with Nicholas Kenneth Gouveia as the holder of record. _(confidence: high)_
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA hvac license 17709-SM-A registry-verified active — registry holder of record: Nicholas Kenneth Gouveia”
- Google shows 4.9 stars from 254 ratings, and the reviews quoted in the packet run from 2025 to August 2026 and are almost entirely five-star. _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Monomoy%20Mechanical%2C%20LLC&query_place_id=ChIJkRlZ3abN5IkREgS-xD-duys) — “Google: 4.9★ from 254 ratings”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT210ellYSTFaaTF2V0ZOUFFVSmhOM2cwUmxKSmFFRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOmtzYXI1Zi1vWFNPQUJhN3g0RlJJaEE%7C%7C?hl=en) — “5★ We couldn’t be more grateful and appreciative for the knowledge, professionalism and clear communication Dave and the entire Monomoy Mech…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2pKV2NEQllURFpWVG1OdFVXUTBSa05rTWw4MmNYYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjJWcDBYTDZVTmNtUWQ0RkNkMl82cXc%7C%7C?hl=en) — “5★ Tim D. was professional, knowledgeable and very good at communicating and explaining the needed AC repairs.  He completed the job with ac…”
  - [HomeAdvisor](https://www.homeadvisor.com/rated.monomoymechanicalllc.155943778.html) — “HomeAdvisor: 5.0★ from 1 ratings”
- Speed of response is the most repeated theme: reviewers describe technicians arriving the same day they called, late at night, or within 24 hours during summer heat waves. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSQmNIWm9abGd4VkdOU1YxWlNiVXRPUTFOd2NGRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlRBcHZoZlgxVGNSV1ZSbUtOQ1NwcFE%7C%7C?hl=en) — “5★ Came out late at night to fix our AC. Emergency charge was very reasonable. Service was great.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xWdVNIVm5Rek5mYUZSaU5uaDJiVTF2ZEhCaFZHYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlVuSHVnQzNfaFRiNnh2bU1vdHBhVGc%7C%7C?hl=en) — “5★ They arrived on the same day I called and were very efficient in fixing our HVAC issue”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xGSU1XcE1jSEpuVkUxbU1WVTNMVnBJVVRGcWRWRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlFIMWpMcHJnVE1mMVU3LVpIUTFqdVE%7C%7C?hl=en) — “5★ Fantastic!  Matt heard my urgency when I called about my air conditioning not working.  He did his best to have a tech come the same day …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tNeWRYTlZkakZOU3pGb1ZqRnVlRUpxUjNGYVRsRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOkMydXNVdjFNSzFoVjFueEJqR3FaTlE%7C%7C?hl=en) — “5★ Great company to work with. One of our mini splits stopped working during the current heatwave, with temperatures in the 90’s and heat in…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21aUlRFcDVkVWxTVVc1cVkxVjRSMHR0VUVaNkxVRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOmZRTEp5dUlSUW5qY1V4R0ttUEZ6LUE%7C%7C?hl=en) — “5★ Timely, reliable and responsive!
Messaged Monomoy Mechanical after hours when our AC compressor stopped working. Within minutes I was abl…”
- Technicians are repeatedly named and praised for explaining the diagnosis and the fix in plain terms before doing the work. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT20xTVQxUjJkRk5XT0daUk5FMUVSM1ZNVldjMU9HYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOm1MT1R2dFNWOGZRNE1ER3VMVWc1OGc%7C%7C?hl=en) — “5★ Josh was great to work with. Prompt service, professional, explained everything well,  very straightforward, answered all my questions. H…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xCRFNIVm9WVGhTYlhjd1dreHRVblJmY0dscmVtYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlBDSHVoVThSbXcwWkxtUnRfcGlremc%7C%7C?hl=en) — “5★ Josh T arrived on time, diagnosed problem and explained solution. Would highly recommend Monomoy Mechanical.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tjemJFVkVObHBSUW1WTWEzYzBPRVIzWDFWdVkyYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOkczbEVENlpRQmVMa3c0OER3X1VuY2c%7C%7C?hl=en) — “5★ Oriano arrived early and was very thorough. He explained everything he was doing. Very personable and is a credit to the company.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25KRVR6ZEtUM05zWnpGeFVVY3RSMHAwTjFWVVNVRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOnJETzdKT3NsZzFxUUctR0p0N1VUSUE%7C%7C?hl=en) — “5★ I’ve been having issues with our HVAC unit for a year and Josh was able to figure out what the issue was, suggested a permanent fix and a…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xaVE1uRmZWbko1VVVOR09HWTNOMGd0TWxOUE5YYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlZTMnFfVnJ5UUNGOGY3N0gtMlNPNXc%7C%7C?hl=en) — “5★ Josh was terrific! He explained everything clearly, was personable, and very efficient. Would 10/10 recommend him!”
- Mini-split and heat-pump installation draws the most detailed praise, including a 2025 job where the crew replaced dampers and adjusted ductwork to improve airflow between floors. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xwSE1WbG5kbGhuTjFGSFNVbHhjbEZqT0U1eVgwRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlpHMVlndlhnN1FHSUlxclFjOE5yX0E%7C%7C?hl=en) — “5★ Oriano was professional & thorough, and did a great job servicing AC mini splits.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25ZMFRWUjNiMFpqYzBaR1duQjVPR2RXYjNVNVYyYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOnY0TVR3b0Zjc0ZGWnB5OGdWb3U5V2c%7C%7C?hl=en) — “5★ Highly Recommended – Monomoy Mechanical LLC Delivered Excellence!
Jay and Troy worked incredibly hard and completed the mini split instal…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2poZlRVZ3pWbmRLUjJNMllUVjVlVEpDVm1FeFZuYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjhfTUgzVndKR2M2YTV5eTJCVmExVnc%7C%7C?hl=en) — “5★ Dustin and Jake did a good careful job installing our new Heatpumps.  They did damper replacement and duct adjustment work to improve our…”
- Air-conditioning diagnosis and repair is the work the recent record shows them hired for most often. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25abE5FZ3hPRWR0U2podmFuRnJOV3d0WXpWS1ZuYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOnZlNEgxOEdtSjhvanFrNWwtYzVKVnc%7C%7C?hl=en) — “5★ Tim was on time and was a great
Help in getting the air conditioner back on at our house!”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2paWmJqVTRRa1JTZGxSTVdrdGpUVlpGV21adlFXYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjZZbjU4QkRSdlRMWktjTVZFWmZvQWc%7C%7C?hl=en) — “5★ Tim d was awesome.   Every part of my ac service was perfect on a hot day with same day aervice.   Thank you for going above and beyond.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xOcmRVSTRXREpVYmxodVoyMVNURkZ2VXpsdloxRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlNrdUI4WDJUblhuZ21STFFvUzlvZ1E%7C%7C?hl=en) — “5★ Technician was able to squeeze me in 2 days early. Josh was personable, knowledgeable, and had my A/C fixed in less than one hour.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2pKV2NEQllURFpWVG1OdFVXUTBSa05rTWw4MmNYYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjJWcDBYTDZVTmNtUWQ0RkNkMl82cXc%7C%7C?hl=en) — “5★ Tim D. was professional, knowledgeable and very good at communicating and explaining the needed AC repairs.  He completed the job with ac…”
- A November 2025 reviewer said they asked for an estimate and a lead time on a fairly simple plumbing job and, after multiple text exchanges, received neither. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT201bVFWSXdabXBxVkY5RE4yNWZZa3BMUWxkelJXYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOm5mQVIwZmpqVF9DN25fYkpLQldzRWc%7C%7C?hl=en) — “1★ Tried to get an estimate and a lead time on getting a fairly simple plumbing job done.

After multiple conversations via text no quote no…”
- Reviewers name a sizeable field team — Dave, Matt, Tim D., Josh T., Oriano, Justin, Connor, Jay, Troy, Dustin and Jake — alongside Monica handling scheduling in the office. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT210ellYSTFaaTF2V0ZOUFFVSmhOM2cwUmxKSmFFRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOmtzYXI1Zi1vWFNPQUJhN3g0RlJJaEE%7C%7C?hl=en) — “5★ We couldn’t be more grateful and appreciative for the knowledge, professionalism and clear communication Dave and the entire Monomoy Mech…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2pJNGRYQlhhVGQ1UmtkZk1IaEVhbXBvWldOVFUyYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjI4dXBXaTd5RkdfMHhEampoZWNTU2c%7C%7C?hl=en) — “5★ Mat is incredible very polite always friendly really knows what he’s doing expertise all the way. Very reasonable pricing always dependab…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25abE5FZ3hPRWR0U2podmFuRnJOV3d0WXpWS1ZuYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOnZlNEgxOEdtSjhvanFrNWwtYzVKVnc%7C%7C?hl=en) — “5★ Tim was on time and was a great
Help in getting the air conditioner back on at our house!”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xCRFNIVm9WVGhTYlhjd1dreHRVblJmY0dscmVtYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlBDSHVoVThSbXcwWkxtUnRfcGlremc%7C%7C?hl=en) — “5★ Josh T arrived on time, diagnosed problem and explained solution. Would highly recommend Monomoy Mechanical.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tjemJFVkVObHBSUW1WTWEzYzBPRVIzWDFWdVkyYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOkczbEVENlpRQmVMa3c0OER3X1VuY2c%7C%7C?hl=en) — “5★ Oriano arrived early and was very thorough. He explained everything he was doing. Very personable and is a credit to the company.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xoaGRUWm1ia3N5TldGSk4zWnFhSGRDTUVveFVuYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlhhdTZmbksyNWFJN3ZqaHdCMEoxUnc%7C%7C?hl=en) — “5★ Talked to Monica and she sent someone out right away fixed the problem.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21KcmEwWjNTRmxtVkd0NE9GaE5kWFZHWVMxa1FXYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOmJra0Z3SFlmVGt4OFhNdXVGYS1kQWc%7C%7C?hl=en) — “5★ Justin and Connor were exceptional in installing my new service.  They take care and pride in their work.  Very courteous and informative…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2toUlMydEVRMDVNZDNSaE1rSTBUMnRFWmxWbWNHYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOkhRS2tEQ05Md3RhMkI0T2tEZlVmcGc%7C%7C?hl=en) — “5★ The tech Oriano was very nice and professional. Did a great job. Very happy with the service. Thank you”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25ZMFRWUjNiMFpqYzBaR1duQjVPR2RXYjNVNVYyYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOnY0TVR3b0Zjc0ZGWnB5OGdWb3U5V2c%7C%7C?hl=en) — “5★ Highly Recommended – Monomoy Mechanical LLC Delivered Excellence!
Jay and Troy worked incredibly hard and completed the mini split instal…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2poZlRVZ3pWbmRLUjJNMllUVjVlVEpDVm1FeFZuYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjhfTUgzVndKR2M2YTV5eTJCVmExVnc%7C%7C?hl=en) — “5★ Dustin and Jake did a good careful job installing our new Heatpumps.  They did damper replacement and duct adjustment work to improve our…”
- A 2025 reviewer described being sent a live tracking link showing how long until the technician arrived. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21aUlRFcDVkVWxTVVc1cVkxVjRSMHR0VUVaNkxVRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOmZRTEp5dUlSUW5qY1V4R0ttUEZ6LUE%7C%7C?hl=en) — “5★ Timely, reliable and responsive!
Messaged Monomoy Mechanical after hours when our AC compressor stopped working. Within minutes I was abl…”
- A reviewer who needed a late-night air-conditioning repair described the emergency charge as very reasonable. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSQmNIWm9abGd4VkdOU1YxWlNiVXRPUTFOd2NGRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlRBcHZoZlgxVGNSV1ZSbUtOQ1NwcFE%7C%7C?hl=en) — “5★ Came out late at night to fix our AC. Emergency charge was very reasonable. Service was great.”
- A Nextdoor neighbour answered a request for emergency HVAC recommendations by naming the company. _(confidence: medium)_
  - [Nextdoor](https://nextdoor.com/p/qDFR3bmCC3D8) — “Nextdoor (Harwich, MA) — Monomoy mechanical.”
- Specializes in HVAC / Heating & Cooling _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT210ellYSTFaaTF2V0ZOUFFVSmhOM2cwUmxKSmFFRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOmtzYXI1Zi1vWFNPQUJhN3g0RlJJaEE%7C%7C?hl=en) — “5★ We couldn’t be more grateful and appreciative for the knowledge, professionalism and clear communication Dave and the entire Monomoy Mech…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xwSE1WbG5kbGhuTjFGSFNVbHhjbEZqT0U1eVgwRRAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOlpHMVlndlhnN1FHSUlxclFjOE5yX0E%7C%7C?hl=en) — “5★ Oriano was professional & thorough, and did a great job servicing AC mini splits.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2pKV2NEQllURFpWVG1OdFVXUTBSa05rTWw4MmNYYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjJWcDBYTDZVTmNtUWQ0RkNkMl82cXc%7C%7C?hl=en) — “5★ Tim D. was professional, knowledgeable and very good at communicating and explaining the needed AC repairs.  He completed the job with ac…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25ZMFRWUjNiMFpqYzBaR1duQjVPR2RXYjNVNVYyYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOnY0TVR3b0Zjc0ZGWnB5OGdWb3U5V2c%7C%7C?hl=en) — “5★ Highly Recommended – Monomoy Mechanical LLC Delivered Excellence!
Jay and Troy worked incredibly hard and completed the mini split instal…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2poZlRVZ3pWbmRLUjJNMllUVjVlVEpDVm1FeFZuYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOjhfTUgzVndKR2M2YTV5eTJCVmExVnc%7C%7C?hl=en) — “5★ Dustin and Jake did a good careful job installing our new Heatpumps.  They did damper replacement and duct adjustment work to improve our…”
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA hvac license 17709-SM-A registry-verified active — registry holder of record: Nicholas Kenneth Gouveia”
- Also offers Plumbing _(confidence: low)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT201bVFWSXdabXBxVkY5RE4yNWZZa3BMUWxkelJXYxAB!2m1!1s0x0:0x2bbb9d3fc4be0412!3m1!1s2@1:CAIQACodChtycF9oOm5mQVIwZmpqVF9DN25fYkpLQldzRWc%7C%7C?hl=en) — “1★ Tried to get an estimate and a lead time on getting a fairly simple plumbing job done.

After multiple conversations via text no quote no…”

## Ownership

- Identifies as family-owned — the business's own statement, not independently verified.

## License

Status: **active** (#17709-SM-A, hvac) — verified against the official MA state registry on 2026-08-20, never self-reported.
Re-check at the official registry: https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=Monomoy%20Mechanical%2C%20LLC&query_place_id=ChIJkRlZ3abN5IkREgS-xD-duys): 4.9★ from 254 ratings
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Monomoy%20Mechanical%2C%20LLC&query_place_id=ChIJkRlZ3abN5IkREgS-xD-duys): Listed on this source
- [Yelp](https://www.yelp.com/biz/monomoy-mechanical-south-yarmouth): Listed on this source
- [Official Website](https://www.monomoymechanical.com): Self-reported profile and service details
- [Exa](https://www.buildzoom.com/contractor/monomoy-mechanical-llc): 0 web mentions across the open web (each linked to its source)
- [Exa](https://www.monomoymechanical.com/service-areas/chatham-ma/): 0 web mentions across the open web (each linked to its source)
- [HomeAdvisor](https://www.homeadvisor.com/rated.monomoymechanicalllc.155943778.html): 5.0★ from 1 ratings
- [HomeAdvisor](https://www.homeadvisor.com/rated.monomoymechanicalllc.155943778.html): Listed on this source
- [BuildZoom](https://www.buildzoom.com/contractor/monomoy-mechanical-llc): Listed on this source

## Mentions

Unverified third-party mentions found on the open web — relay with attribution ("a Reddit commenter said…"), never as Tavlee's own finding.

- “Monomoy mechanical.” — nextdoor.com (2026-04-04) — https://nextdoor.com/p/qDFR3bmCC3D8

## Recent reviews

- **5/5 · Google Reviews · Christina Hagopian · 2026-08-19**: We couldn’t be more grateful and appreciative for the knowledge, professionalism and clear communication Dave and the entire Monomoy Mechanical team provided. He replaced our HVAC system with the right diagnosis and  equipment to make our home both comfortable and efficient. Thank you, THANK YOU!!
- **5/5 · Google Reviews · robert BARTON · 2026-08-18**: Mat is incredible very polite always friendly really knows what he’s doing expertise all the way. Very reasonable pricing always dependable
- **5/5 · Google Reviews · Melissa Leone · 2026-08-18**: Excellent and timely service!
- **5/5 · Google Reviews · Helen Robinson · 2026-08-18**: We were so very much pleased with the service we received.   He was so kind and respectful to us.  He explained  everything  to us.  Thank you very  much.
- **5/5 · Google Reviews · Bill Philbrick · 2026-08-12**: Excellent
- **5/5 · Google Reviews · Kim Lembo · 2026-08-11**: Tim was on time and was a great
Help in getting the air conditioner back on at our house!
- **5/5 · Google Reviews · kelleher family · 2026-08-08**: Came out late at night to fix our AC. Emergency charge was very reasonable. Service was great.
- **5/5 · Google Reviews · Matthew Wiencke · 2026-08-04**: Josh was great to work with. Prompt service, professional, explained everything well,  very straightforward, answered all my questions. Highly recommend!
- **5/5 · Google Reviews · Alexandria Sullivan · 2026-07-30**: Professional, friendly efficient simply excellent
- **5/5 · Google Reviews · Jeff Costa · 2026-07-30**: Josh T arrived on time, diagnosed problem and explained solution. Would highly recommend Monomoy Mechanical.

---

Data freshness: last scanned 2026-08-20T06:26:35.926Z.
Cite as: Monomoy Mechanical, LLC — Tavlee (https://tavlee.com/contractor/monomoy-mechanical-llc-south-yarmouth)
Source: https://tavlee.com/contractor/monomoy-mechanical-llc-south-yarmouth