Landscape Design Darien, CT | Greenwich, CT

Residential & Commercial

LANDSCAPE DESIGN In Stamford, CT & the surrounding areas

Our Goal - Deliver Landscaping Solutions Our Customers Can Feel Confident In, Season After Season.

Hours: Open - Closes 4:30 pm

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Straightforward Estimates, Prompt Responses

If you’re planning a landscaping project, we make it easy to get started. Call us today and we’ll respond within one business day to discuss your needs and provide a free estimate.

(203) 357-0788

A Local Landscaping Company
Built on Experience

Since 2008, Thomas J Costello Landscaping LLC has provided professional landscaping services to residential and commercial properties throughout Stamford, CT, and surrounding towns. As a family-owned business licensed by the State of Connecticut, we focus on dependable service, consistent workmanship, and results that hold up over time. Our goal is simple: deliver landscaping solutions our customers can feel confident in, season after season.

Tick Spraying Programs
We offer professional tick spraying services designed to significantly reduce tick activity on your property.
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Lawn & Plant Care

Fertilization, plant health treatments, mowing, hedge trimming, aeration, tick control, and seasonal maintenance programs.

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Hardscaping & Masonry
Stone patios, retaining walls, walkways, and outdoor features built to last and look natural.
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Landscape Architecture
The process where drawings, drafted in a universal language, are created for use by other consultants, and for permitting and construction.
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Landscape Design & Planning
We create layouts that fit your property and style, including lawns, shrubs, trees, and flower beds.
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Outdoor Living Spaces
Patios, fire pits, water features, raised vegetable gardens, fences, and outdoor kitchens — designed to make your yard functional and enjoyable.
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Seasonal Services
Snow removal, holiday decorating, and spring/fall clean-ups to keep your property safe and looking its best throughout the year.
VIEW PORTFOLIO
Tick Spraying Programs
We offer professional tick spraying services designed to significantly reduce tick activity on your property.
VIEW PORTFOLIO
Lawn & Plant Care

Fertilization, plant health treatments, mowing, hedge trimming, aeration, tick control, and seasonal maintenance programs.

VIEW PORTFOLIO
Hardscaping & Masonry
Stone patios, retaining walls, walkways, and outdoor features built to last and look natural.
VIEW PORTFOLIO
Landscape Architecture
The process where drawings, drafted in a universal language, are created for use by other consultants, and for permitting and construction.
VIEW PORTFOLIO
Landscape Design & Planning
We create layouts that fit your property and style, including lawns, shrubs, trees, and flower beds.
VIEW PORTFOLIO
Outdoor Living Spaces
Patios, fire pits, water features, raised vegetable gardens, fences, and outdoor kitchens — designed to make your yard functional and enjoyable.
VIEW PORTFOLIO
Seasonal Services
Snow removal, holiday decorating, and spring/fall clean-ups to keep your property safe and looking its best throughout the year.
VIEW PORTFOLIO

From Design to Long-Term Care

Thomas J Costello Landscaping LLC supports every stage of your landscape’s lifecycle — from initial design and installation to routine care and seasonal services.We invite you to view examples of our recent work to see the craftsmanship and attention to detail we bring to every job. We are particularly recognized for our cliff rock installation work and welcome projects throughout Greenwich, CT, and nearby areas.

A Team That Stays
& It Shows

Experience matters, but consistency matters even more. Our crew brings over 100 years of combined hands-on experience, and the majority of our team has worked together for more than ten years.The company founder holds a Bachelor’s degree in Landscape and Nursery Management from SUNY Cobleskill, giving every project a strong technical foundation.

This long-term teamwork allows us to work efficiently, communicate clearly, and maintain high standards across every service we provide.

Why Homeowners Continue
to Choose Us

Clients turn to us not only for our experience, but for our reliability, clear communication, and respect for their time and property. From custom raised beds to specialty features like outdoor pizza ovens, we approach every project with the same level of care and professionalism.

These principles have made us a trusted choice for landscape design in Darien, CT, and throughout the region.

“Bespoke Service”
Approach

Every property presents different challenges and opportunities. That’s why we don’t follow a standard template for our work. We evaluate each project based on layout, terrain, function, and your personal preferences.

Whether you’re enhancing an existing landscape or planning something entirely new, your goals guide every decision we make.

From Our Clients

J
J A
I did a tick treatment contract with Costello last year (2025) and was very happy with their techs. They really took the time to treat the property and problem areas during each visit. Price was very reasonable. Professional company in my experience.
M
Maria McFall
Tom Costello and his crew have been working for me for many years! They’re always willing to drop what they’re doing to come and help me out and I am so grateful to have such an Honest and meticulous group of men working for me! They are the best!!!
R
Robert Garvey
Excellent work at a competitive price. Tom Costello closely manages his projects and is easy to work with. He is a man of his word.
R
Raymond metro
Thomas Costello has always been easy to work with, attentive to his customer's needs, and most importantly returns emails and calls quickly. His team is professional, and they will quickly make right any issues that pop up. I strongly recommend Thomas J Costello Landscaping
R
Richard Cerrone
By far, the best level of service for landscaping and lawn care is Thomas J Costello Landscaping. The crew is well trained and delivers a high level of quality. Their attention to detail throughout the seasons is consistent.
S
Steffen Kondi
The best Landscaping company around! Affordable prices and great quality work. Thomas and his crew were on time for the work we did expanding our patio and installed a rock wall in our backyard! No bait n switch with the quote they gave me from start to finish. I highly recommend Thomas J Costello Landscaping for any jobs or landscaping needs!
P
Paul Jeffery
Thomas J Costello Landscaping designed and built an attractive upgraded front entrance for the lower section of our condo association. Day to day they do a very good job maintaining our lawn and bushes/shrubs as well as clearing snow from our condo driving area.

Your Local Landscaping
Partner

We stand behind our work and offer free estimates on all services
Whether you’re preparing for winter snow removal or planning a complete landscape renovation.
If you’re looking for a dependable landscaping contractor in Darien, CT, or the surrounding areas, contact Thomas J Costello Landscaping LLC today at (203) 357-0788.

Request an Estimate

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Get Started With Your Landscaping Project