# O’Leary Landscaping

**Trade:** Landscaping · **Address:** 129 Queen Anne Rd, Harwich, MA 02645 · **Phone:** (508) 432-5198 · **Website:** http://olearylandscaping.com/ · **Languages:** English

**Rating: 3.8/5** (low confidence) — from 4 reviews across 6 sources.

## The honest read

O'Leary Landscaping has been serving Harwich, Chatham and Brewster with design, construction, hardscape and irrigation work — the company recently merged with Lower Cape Irrigation to round out that side of the business, and says it's been doing this since 1980 (BBB dates the company's start to 1998; the exact founding year is worth confirming).

One customer's 2025 review says they've used the company for over 20 years and still count on it for regular home maintenance. Another, from 2023, described a specific fix: a builder had left too much fill on the property, causing basement flooding, and O'Leary regraded the yard and repitched a walkway and patio to send rainwater away from the house — at what the homeowner called a fair price. In a 2016 review, a customer called the crew thorough, punctual and meticulous, and noted they also handle winter plowing for the Cape Cod Theatre Company.

The company carries an Angie's List Super Service Award from 2015 and 2016 and holds an A+ BBB grade. Its Houzz listing shows a landscape license number, though that hasn't been independently verified against the state registry — worth asking about directly. There's also some inconsistency about who currently runs the business: BBB names Sean M. O'Leary as president, while the company's own website credits ownership to Dan O'Leary — good to clarify who you'd be working with.

Between the drainage fix, the long-tenured customer, and the hardscape and masonry work in its portfolio, this reads as a full-service Cape Cod outfit worth calling for anything from routine lawn care to a patio or retaining wall project.

**Strengths:**
- Long-tenured customers — one review cites 20-plus years of consistent service
- Drainage fixes — regraded yard resolved chronic basement flooding at a fair price
- Cape Cod awards — Angie's List Super Service Award in 2015 and 2016

**Where sources disagree:**
- BBB names Sean M. O'Leary as president; the company's website credits ownership to Dan O'Leary
- Self-reported founding in 1980 versus BBB's listed start date of 1998

## Claims & citations

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

- Self-reports being a full-service Cape Cod landscaping and irrigation company handling design, construction, maintenance, hardscape, lighting and irrigation for residential and commercial clients _(confidence: medium)_
  - [Official Website](http://olearylandscaping.com) — “A full-service Cape Cod landscaping and irrigation company offering design, construction, maintenance, hardscape, lighting, and irrigation s…”
- Self-reports operating since 1980, following a recent merger with Lower Cape Irrigation _(confidence: medium)_
  - [Official Website](http://olearylandscaping.com) — “Company history (self-reported): In business since 1980; recently merged with Lower Cape Irrigation to become a full-service landscaping and…”
  - [Official Website](http://olearylandscaping.com) — “Self-reported 46 years in business”
- BBB lists the company as a Harwich sole proprietorship under Sean M. O'Leary, started in 1998, with an A+ letter grade _(confidence: high)_
  - [Better Business Bureau](https://www.bbb.org/us/ma/harwich/profile/irrigation-equipment/oleary-landscaping-and-irrigation-0021-125933) — “Better Business Bureau grade: A+”
  - [Better Business Bureau](https://www.bbb.org/us/ma/harwich/profile/irrigation-equipment/oleary-landscaping-and-irrigation-0021-125933) — “BBB lists O'Leary Landscaping and Irrigation as a Harwich, MA sole proprietorship (Sean M. O'Leary, President), not BBB Accredited, with an …”
- A 2025 review describes a 20-plus-year customer relationship and consistent service _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTUNvZ2VXSEh3EAE!2m1!1s0x0:0x98afe680e82728bc!3m1!1s2@1:CIHM0ogKEICAgMCogeWHHw%7C%7C?hl=en) — “5★ We have used O’Leary Landscape and irrigation for over 20 years. I am finding it hard to think of any other company that I haven’t had to…”
- A 2023 review describes regrading a yard and repitching a walkway/patio to fix chronic basement flooding, at a fair price _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNSazgyR0RBEAE!2m1!1s0x0:0x98afe680e82728bc!3m1!1s2@1:CIHM0ogKEICAgICRk82GDA%7C%7C?hl=en) — “5★ Did a great job regrading my side and back yard, lowering and properly sloping a walkway and patio.  Builder had put in too much fill, an…”
- In a 2016 review, called thorough, punctual and meticulous; also handles winter plowing for the Cape Cod Theatre Company _(confidence: low)_
  - [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672) — “5★ A fabulous landscaping and irrigation firm. They are thorough, punctual and meticulous. My yard looks better than I ever imagined. They a…”
- Holds an Angie's List Super Service Award (2015, 2016) and 2 Houzz badges _(confidence: medium)_
  - [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672) — “Listed certification: Angie's List Super Service Award (2015, 2016)”
  - [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672) — “Listed certification: 2 Houzz Badges”
- Houzz lists a landscape license number (MCLP#1561); not independently verified against the state registry _(confidence: low)_
  - [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672) — “Licence listed on Houzz: MCLP#1561”
- Specializes in Landscaping _(confidence: high)_
  - [Official Website](http://olearylandscaping.com) — “A full-service Cape Cod landscaping and irrigation company offering design, construction, maintenance, hardscape, lighting, and irrigation s…”
  - [Official Website](http://olearylandscaping.com) — “Company history (self-reported): In business since 1980; recently merged with Lower Cape Irrigation to become a full-service landscaping and…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTUNvZ2VXSEh3EAE!2m1!1s0x0:0x98afe680e82728bc!3m1!1s2@1:CIHM0ogKEICAgMCogeWHHw%7C%7C?hl=en) — “5★ We have used O’Leary Landscape and irrigation for over 20 years. I am finding it hard to think of any other company that I haven’t had to…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNSazgyR0RBEAE!2m1!1s0x0:0x98afe680e82728bc!3m1!1s2@1:CIHM0ogKEICAgICRk82GDA%7C%7C?hl=en) — “5★ Did a great job regrading my side and back yard, lowering and properly sloping a walkway and patio.  Builder had put in too much fill, an…”
  - [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672) — “5★ A fabulous landscaping and irrigation firm. They are thorough, punctual and meticulous. My yard looks better than I ever imagined. They a…”
  - [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672) — “Services offered (Houzz): Landscape Construction, Hardscaping, Landscape Maintenance, Patio Construction, Paver Installation, Retaining Wall…”
- Also offers Masonry _(confidence: low)_
  - [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672) — “Services offered (Houzz): Landscape Construction, Hardscaping, Landscape Maintenance, Patio Construction, Paver Installation, Retaining Wall…”

## License

Status: **not_found** — verified against the official MA state registry, never self-reported.
Re-check at the official registry: https://contractorhub.mass.gov/s/hic-contractor-search

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=O%E2%80%99Leary%20Landscaping&query_place_id=ChIJm2IEBgY_-4kRvCgn6IDmr5g): 4.5★ from 10 ratings
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=O%E2%80%99Leary%20Landscaping&query_place_id=ChIJm2IEBgY_-4kRvCgn6IDmr5g): Listed on this source
- [Better Business Bureau](https://www.bbb.org/us/ma/harwich/profile/irrigation-equipment/oleary-landscaping-and-irrigation-0021-125933): Listed on this source
- [Yelp](https://www.yelp.com/biz/o-leary-landscaping-harwich): Listed on this source
- [Official Website](http://olearylandscaping.com): 46 yrs in business · Self-reported profile and service details
- [Houzz](https://www.houzz.com/professionals/landscape-contractors/o-leary-landscaping-and-irrigation-pfvwus-pf~1452582672): 5.0★ from 1 ratings

## Recent reviews

- **5/5 · Google Reviews · Ryan Maas · 2025-04-17**: We have used O’Leary Landscape and irrigation for over 20 years. I am finding it hard to think of any other company that I haven’t had to switch from for home maintenance needs during that time. It is very nice to know that they still value the customer and provide great service at a fair price. Yes…
- **5/5 · Google Reviews · Robert T Jones · 2024-02-17**: Gave good referral
- **5/5 · Google Reviews · Chuck McQuaid · 2023-04-10**: Did a great job regrading my side and back yard, lowering and properly sloping a walkway and patio.  Builder had put in too much fill, and my cellar used to flood.  O'Leary fixed the problem and charged a fair price.  Now the rainwater goes away from the house.  Thank you!
- **5/5 · Houzz · 2016-08-17**: A fabulous landscaping and irrigation firm. They are thorough, punctual and meticulous. My yard looks better than I ever imagined. They also provide plowing service for the Cape Cod Theatre Company and they always make certain we can open for business after it snows. I am so impressed with their ser…

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Data freshness: last scanned 2026-08-22T13:33:51.477Z.
Cite as: O’Leary Landscaping — Tavlee (https://tavlee.com/contractor/o-leary-landscaping-harwich)
Source: https://tavlee.com/contractor/o-leary-landscaping-harwich